ORCID Profile
0000-0003-4494-2625
Current Organisation
Charles Darwin University
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Informa UK Limited
Date: 19-09-2013
DOI: 10.3109/19401736.2013.830297
Abstract: In this study, we describe the first complete mitochondrial sequence for the Endangered dwarf sawfish Pristis clavata. The base composition of the 16,804 bp long mitogenome is 31.9% A, 26.5% C, 13.3% G and 28.3% T and the gene arrangement and transcriptional direction are the same as those found in most vertebrates. All protein-coding genes start with ATG except the COI gene, which starts with GTG. Stop codons include incomplete T, AGG and TAA however, TAG is not found in the mitogenome of this euryhaline elasmobranch species.
Publisher: Wiley
Date: 18-11-2019
DOI: 10.1111/CONL.12688
Publisher: Wiley
Date: 23-06-2022
DOI: 10.1111/FAF.12675
Abstract: Chondrichthyan fishes are among the most threatened vertebrates on the planet because many species have slow life histories that are outpaced by intense fishing. The Western Central Atlantic Ocean, which includes the Greater Caribbean, is a hotspot of chondrichthyan bio ersity and abundance, but has been characterized by extensive shark and ray fisheries and a lack of sufficient data for effective management and conservation. To inform future research and management decisions, we analysed patterns in chondrichthyan extinction risk, reconstructed catches and management engagement in this region. We summarized the extinction risk of 180 sharks, rays and chimaeras, including 66 endemic and 14 near‐endemic species, using contemporary IUCN Red List assessments. Over one‐third (35.6%) were assessed as Vulnerable, Endangered or Critically Endangered, primarily due to overfishing. Reconstructed catches from 1950 to 2016 peaked in 1992, then declined by 40.2% thereafter. The United States, Venezuela and Mexico were responsible for most catches in the region and hosted the largest proportions of the regional distributions of threatened species, largely due to having extensive coastal habitats in their Exclusive Economic Zones. The quantity and taxonomic resolution of fisheries landings data were poor in much of the region, and national‐level regulations varied widely across jurisdictions. Deepwater fisheries represent an emerging threat, although many deepwater chondrichthyans currently have refuge beyond the depths of most fisheries. Regional collaboration as well as effective and enforceable management informed by more complete fisheries data, particularly from small‐scale fisheries, are required to protect and recover threatened species and ensure sustainable fisheries.
Publisher: Wiley
Date: 16-04-2019
DOI: 10.1002/AQC.3053
Publisher: Cambridge University Press (CUP)
Date: 22-02-2022
DOI: 10.1017/S0959270921000447
Abstract: Knowledge of where a threatened species occurs in a landscape is crucial for determining its habitat requirements and informing its conservation planning and management. We conducted the first broad-scale survey of the Endangered Alligator Rivers Yellow Chat Epthianura crocea tunneyi across much of its known range on drying coastal floodplains in northern Australia. Presence-absence records from 257 sites surveyed in the late dry season (August–December) of 2018 and 2019 were modelled using occupancy/detectability models. Occupancy was estimated to be 0.10 ± 0.04 with a high detection probability (0.89 ± 0.07). Modelling of 13 site-level environmental covariates found that chats were more likely to be detected at sites where the native shrub Sesbania sesban was present, were close to hydrogeological features such as depressions or channels, were long unburnt (5+ years) and/or with topsoil damage caused by feral pigs. Our estimates of chat occupancy, detectability, and the covariates that influence their occupancy, have improved our understanding of the role that fire and feral animals have on chat distribution and habitat selection, and can be used as a baseline for future monitoring. We also provide recommendations on how to design and implement future monitoring of this subspecies.
Publisher: Frontiers Media SA
Date: 06-09-2021
DOI: 10.3389/FCOSC.2021.719981
Abstract: The conservation of threatened elasmobranchs in tropical regions is challenging due to high local reliance on aquatic and marine resources. Due primarily to fishing pressure, river sharks ( Glyphis ) and sawfishes (Pristidae) have experienced large population declines in the Indo-Pacific. Papua New Guinea (PNG) may offer a refuge for these species, as human population density is low, and river shark and sawfish populations are thought to persist. However, few data are available on these species in PNG, and risk posed by small-scale fishers is poorly understood. This study observed elasmobranch catches in small-scale fisheries in riverine and coastal environments in the East Sepik (northern region), Gulf, and Western Provinces (southern region) of PNG. Surveys were conducted over a period of weeks to months in each region, during the dry season across seven field trips from 2017 to 2020. We observed a total of 783 elasmobranchs encompassing 38 species from 10 families. River sharks made up 29.4% of observations in the southern region, while sawfishes made up 14.8 and 20.3% in the northern and southern regions, respectively. River sharks were commonly caught by small-scale fishers in lower riverine environments in southern PNG, while sawfishes were generally less common and mainly observed through dried rostra. The primary threat to river shark and sawfish populations is their capture by small-scale fishers targeting teleosts for swim bladder. Persisting populations of river sharks and sawfishes indicate that PNG is the second known nation with viable populations of multiple species in the Indo-Pacific. However, populations are declining or at high risk of decline, and fisheries management and conservation are required to realize the potential of PNG as a long-term refuge.
Publisher: Wiley
Date: 23-04-2020
DOI: 10.1002/AQC.3331
Abstract: The process of understanding the rapid global decline of sawfishes (Pristidae) has revealed great concern for their relatives, the wedgefishes (Rhinidae) and giant guitarfishes (Glaucostegidae), not least because all three families are targeted for their high‐value and internationally traded ‘white’ fins. The objective of this study was to assess the extinction risk of all 10 wedgefishes and six giant guitarfishes by applying the International Union for Conservation of Nature (IUCN) Red List Categories and Criteria, and to summarize the latest understanding of their biogeography and habitat, life history, exploitation, use and trade, and population status. Three of the 10 wedgefish species had not been assessed previously for the IUCN Red List. Wedgefishes and giant guitarfishes have overtaken sawfishes as the most imperilled marine fish families globally, with all but one of the 16 species facing an extremely high risk of extinction through a combination of traits: limited biological productivity presence in shallow waters overlapping with some of the most intense and increasing coastal fisheries in the world and overexploitation in target and by‐catch fisheries, driven by the need for animal protein and food security in coastal communities and the trade in meat and high‐value fins. Two species with very restricted ranges, the clown wedgefish ( Rhynchobatus cooki ) of the Malay Archipelago and the false shark ray ( Rhynchorhina mauritaniensis ) of Mauritania, may be very close to extinction. Only the eyebrow wedgefish ( Rhynchobatus palpebratus ) is not assessed as Critically Endangered, with it occurring primarily in Australia where fishing pressure is low and some management measures are in place. Australia represents a ‘lifeboat’ for the three wedgefish and one giant guitarfish species occurring there. To conserve populations and permit recovery, a suite of measures will be required that will need to include species protection, spatial management, by‐catch mitigation, and harvest and international trade management, all of which will be dependent on effective enforcement.
Publisher: Informa UK Limited
Date: 20-01-2015
DOI: 10.3109/19401736.2014.1003898
Abstract: In this study, we describe the first complete mitochondrial sequence for the Endangered Narrow Sawfish Anoxypristis cuspidata. It is 17,243 bp in length and contains 13 protein-coding genes, two rRNA genes, 22 tRNA genes, and a control region with the common vertebrate mitogenomic organization. A total of 30 bp overlaps and 28 bp short intergenic spaces are located between all genes. The overall base composition is 32.7% A, 25.7% C, 12.9% G, and 28.6% T. Two start codons (ATG and GTG) and two stop codons (TAG and TAA/T) were used in all protein-coding genes. The origin of L-strand replication (OL) sequence (38 bp) formed a hairpin structure (13 bp stem and 12 bp loop) to initiate the replication of L-strand.
Publisher: Magnolia Press
Date: 19-07-2017
DOI: 10.11646/ZOOTAXA.4294.3.3
Abstract: Descriptions of the egg cases of Dentiraja polyommata (n = 16) and Asymbolus pallidus (n = 44) are provided from egg cases collected from a commercial trawl fishery off Swain Reefs, central Queensland, Australia. Egg cases of D. polyommata are rectangular, convex and golden-tan in colour and those of A. pallidus elongate, vase-shaped and golden. To determine if a comparative statistical non-metric multi-dimensional scaling approach could identify egg cases of species taken in the same region and fishery, egg cases were compared with the skate D. endeavouri and catsharks A. analis, A. rubiginosus and Figaro boardmani. The statistical approach clearly discriminated the species based on five proportional measurements and identified the morphometrics that separated genera and species. This approach is valuable in a fisheries context for accurate identification of visually similar egg cases that can assist management of oviparous chondrichthyans. A rare incidence of intraspecific chondrichthyan cannibalism was noted for A. pallidus males that consumed egg cases of their own species.
Publisher: Cambridge University Press (CUP)
Date: 18-10-2010
DOI: 10.1017/S0025315410001670
Abstract: Three species of Australian endemic catsharks (grey spotted catshark Asymbolus analis , orange spotted catshark A. rubiginosus and Australian sawtail shark Figaro boardmani ) were collected from the trawl grounds of a highly seasonal commercial fishery off southern Queensland, Australia. Specimens were collected on the mid to outer continental shelf at depths between 78 and 168 m. This study provides the first information on the reproductive biology of these three poorly-known species. Mature female and male A. analis were observed from 455 mm total length (TL), mature female A. rubiginosus from 410 mm TL, mature male A. rubiginosus from 405 mm TL, mature female F. boardmani from 402 mm TL and mature male F. boardmani from 398 mm TL (although a lack of immature specimens precluded more accurate assessments of size at maturity). The reproductive mode of all species was confirmed as single oviparous (carrying only one egg case in each uterus at a time). Ovarian fecundity (the number of vitellogenic follicles) ranged from 7–20 in A. analis , 5–23 in A. rubiginosus and 9–13 in F. boardmani . Several indicators suggest that Asymbolus catsharks off southern Queensland are reproductively active year-round. The proportion of female A. rubiginosus carrying egg cases was highest in spring (60%), intermediate in autumn (50%) and lowest in winter (44%).
Publisher: Wiley
Date: 16-10-2020
DOI: 10.1111/JFB.14530
Publisher: CSIRO Publishing
Date: 2017
DOI: 10.1071/MF16177
Abstract: Migration is a fundamental aspect of the life history of many fish and must be well understood for targeted conservation and management. We used acoustic telemetry and otolith 87Sr/86Sr analysis, in conjunction with annual ageing, to study intraspecific variation in barramundi Lates calcarifer migration in the Northern Territory, Australia. Acoustic transmitters were implanted into 25 barramundi (420–1010-mm total length (TL) median 510mm TL) from freshwater reaches of the South Alligator River and their movements tracked over years. 87Sr/86Sr transect analysis was also conducted on otoliths of 67 barramundi from the Daly, Mary, South Alligator and Roper rivers. Acoustic telemetry showed that most fish remained in fresh water across wet and dry seasons. Higher rates of movement occurred during the wet season and a minority of fish moved into the estuary during high flows. Otolith chemistry analyses revealed high ersity in salinity histories among in iduals. We integrated the telemetry and otolith chemistry data to examine migration as a function of the stage of sexual development, and have proposed a revised life history model that identifies three migratory contingents. We conclude that anthropogenic disturbance, including modified river hydrology, has the potential to alter the frequency of life history contingents in barramundi populations.
Publisher: Informa UK Limited
Date: 03-07-2018
Publisher: Informa UK Limited
Date: 2016
Publisher: Magnolia Press
Date: 20-08-2019
DOI: 10.11646/ZOOTAXA.4657.3.14
Abstract: White et al. (2019) described a new species of whaler shark represented by only three specimens from South-east Asia, all collected prior to 1934. They proposed the nomen Carcharhinus obsolerus with the justification of: “The specific name is Latin for ‘extinct’ (obsolerus) in allusion to the fact that the species has not been recorded in many decades.” Dubois & Séret (2019) stated that the epithet obsolerus was “doubtless” an incorrect spelling which must be corrected to obsoletus. However, the Dubois & Séret (2019) publication becomes confusing in its discussion around the wording of the related Articles in the International Code of Zoological Nomenclature (32.2, 33.2 and 32.5) and lacks a clear conclusion.
Publisher: Wiley
Date: 15-08-2018
DOI: 10.1111/FAF.12311
Publisher: Wiley
Date: 07-2013
DOI: 10.1111/JFB.12155
Abstract: Descriptions of the egg cases of three catsharks, Asymbolus analis, Asymbolus rubiginosus and Figaro boardmani, are provided from 65 egg cases obtained from fishing surveys carried out on the continental shelf of southern Queensland, Australia. Egg cases of A. analis, A. rubiginosus and F. boardmani have the same basic morphology they are typically vase-shaped, dorso-ventrally flattened and yellow and brown-tan in colour. The shape of the posterior border in terms of horn length and tendril thickness is the specific characteristic discriminating these three catsharks: enclosed horns in F. boardmani, short horns and tendrils in A. rubiginosus and long, coiled tendrils in A. analis. A non-parametric statistical approach was used as an exploratory tool for egg case identification in which six proportional measurements were sufficient to discriminate between species. Three egg cases of F. boardmani were recovered from the stomachs of three A. rubiginosus, which provided the first evidence of catshark-catshark predator-prey interaction.
Publisher: Wiley
Date: 02-2023
DOI: 10.1002/ECE3.9837
Abstract: The Bull Shark ( Carcharhinus leucas ) faces varying levels of exploitation around the world due to its coastal distribution. Information regarding population connectivity is crucial to evaluate its conservation status and local fishing impacts. In this study, we s led 922 putative Bull Sharks from 19 locations in the first global assessment of population structure of this cosmopolitan species. Using a recently developed DNA‐capture approach (DArTcap), s les were genotyped for 3400 nuclear markers. Additionally, full mitochondrial genomes of 384 Indo‐Pacific s les were sequenced. Reproductive isolation was found between and across ocean basins (eastern Pacific, western Atlantic, eastern Atlantic, Indo‐West Pacific) with distinct island populations in Japan and Fiji. Bull Sharks appear to maintain gene flow using shallow coastal waters as dispersal corridors, whereas large oceanic distances and historical land‐bridges act as barriers. Females tend to return to the same area for reproduction, making them more susceptible to local threats and an important focus for management actions. Given these behaviors, the exploitation of Bull Sharks from insular populations, such as Japan and Fiji, may instigate local decline that cannot readily be replenished by immigration, which can in turn affect ecosystem dynamics and functions. These data also supported the development of a genetic panel to ascertain the population of origin, which will be useful in monitoring the trade of fisheries products and assessing population‐level impacts of this harvest.
Publisher: Wiley
Date: 26-12-2016
DOI: 10.1111/MEC.13929
Abstract: Measuring population connectivity is a critical task in conservation biology. While genetic markers can provide reliable long-term historical estimates of population connectivity, scientists are still limited in their ability to determine contemporary patterns of gene flow, the most practical time frame for management. Here, we tackled this issue by developing a new approach that only requires juvenile s ling at a single time period. To demonstrate the usefulness of our method, we used the Speartooth shark (Glyphis glyphis), a critically endangered species of river shark found only in tropical northern Australia and southern Papua New Guinea. Contemporary adult and juvenile shark movements, estimated with the spatial distribution of kin pairs across and within three river systems, was contrasted with historical long-term connectivity patterns, estimated from mitogenomes and genome-wide SNP data. We found strong support for river fidelity in juveniles with the within-cohort relationship analysis. Male breeding movements were highlighted with the cross-cohort relationship analysis, and female reproductive philopatry to the river systems was revealed by the mitogenomic analysis. We show that accounting for juvenile river fidelity and female philopatry is important in population structure analysis and that targeted s ling in nurseries and juvenile aggregations should be included in the genomic toolbox of threatened species management.
Publisher: Cold Spring Harbor Laboratory
Date: 28-01-2022
DOI: 10.1101/2022.01.26.477854
Abstract: Chondrichthyan fishes are among the most threatened vertebrates on the planet because many species have slow life histories that are outpaced by intense fishing. The Western Central Atlantic Ocean, which includes the greater Caribbean, is a hotspot of chondrichthyan bio ersity and abundance, but is historically characterized by extensive shark and ray fisheries and a lack of sufficient data for effective management and conservation. To inform future research and management decisions, we analyzed patterns in chondrichthyan extinction risk, reconstructed catches, and regulations in this region. We summarized the extinction risk of 180 sharks, rays, and chimaeras using contemporary IUCN Red List assessments and found that over one-third (35.6%) were assessed as Vulnerable, Endangered, or Critically Endangered largely due to fishing. Reconstructed catches from 1950 to 2016 reached their peak in 1992, then declined by 40.2% through the end of the series. The United States, Venezuela, and Mexico were responsible for most catches and hosted large proportions of the regional distributions of threatened species these countries therefore held the greatest responsibility for chondrichthyan management. The abundance and resolution of fisheries landings data were poor in much of the region, and national-level regulations varied widely across jurisdictions. Deepwater fisheries represent an emerging threat, although many deepwater chondrichthyans currently find refuge beyond the depths of most fisheries. Regional collaboration as well as effective and enforceable management informed by more complete fisheries data, particularly from small-scale fisheries, are required to protect and recover threatened species and ensure sustainable fisheries.
Publisher: BirdLife Australia, Ltd.
Date: 2016
DOI: 10.20938/AFO33169177
Publisher: Informa UK Limited
Date: 10-01-2014
DOI: 10.3109/19401736.2013.861428
Abstract: In this study we describe the first complete mitochondrial sequence for the Critically Endangered Northern River shark Glyphis garricki. The complete mitochondrial sequence is 16,702 bp in length, contains 37 genes and one control region with the typical gene order and transcriptional direction of vertebrate mitogenomes. The overall base composition is 31.5% A, 26.3% C, 12.9% G and 29.3% T. The length of 22 tRNA genes ranged from 68 (tRNA-Ser2 and tRNA-Cys) to 75 (tRNA-Leu1) bp. The control region of G. garricki was 1067 bp in length with high A+T (67.9%) and poor G (12.6%) content. The mitogenomic characters (base composition, codon usage and gene length) of G. garricki were very similar to Glyphis glyphis.
Publisher: Informa UK Limited
Date: 24-11-2014
DOI: 10.3109/19401736.2014.982590
Abstract: In this manuscript we describe the first complete mitochondrial sequence for the Data Deficient Pigeye Shark Carcharhinus amboinensis. The mitogenome is 16,704 bp long and consists of 1 control region, 2 rRNA genes, 22 tRNA genes and 13 protein-coding genes with an overall base composition of 31.6% A, 24.9% C, 13.1% G and 30.4% T. The gene arrangement pattern and transcriptional direction were typical for a vertebrate species. The tRNA-Ser2 lacks the dihydrouridine arm and forms a simple loop, therefore it cannot be folded into the typical cloverleaf secondary structures like other tRNAs.
Publisher: IUCN Species Survival Commission Shark Specialist Group
Date: 23-03-2023
DOI: 10.59216/SSG.ISRA.2023.R12
Abstract: The first Important Shark and Ray Areas (ISRA) regional expert workshop was held in hybrid mode (in person and online) in Bogotá, Colombia from 3–7 October 2022. The goal was to identify and delineate three dimensional and discrete portions of habitat that are critical to the survival of sharks, rays, and chimaeras, and that have the potential to be managed for conservation. The region covered was the Central and South American Pacific, from the Gulf of California in Mexico to southern Chile. This scientific collaboration amongst regional and global experts resulted in the identification of 65 Important Shark and Ray Areas, 5 candidate ISRAs, and 11 Areas of Interest. Identified ISRAs range in size from small underwater areas of 1.59 km2 at depths of 1,650–1,700 m (Northern Galápagos Hydrothermal Vents ISRA) to large areas of 3,191,603 km2 (Eastern Tropical Pacific Marine Corridor ISRA) from surface waters to a depth of 1,928 m. This compendium provides an overview of all areas delineated.
Publisher: Wiley
Date: 03-04-2018
DOI: 10.1111/JFB.13619
Abstract: The first record of the Ganges shark Glyphis gangeticus from anywhere in its range in over a decade is reported from the Arabian Sea. One female specimen was recorded at Sassoon Docks in Mumbai, India in February 2016, measuring 266 cm total length. In light of the Critically Endangered status of this species and its rarity, urgent management actions are needed to determine population size and trends in abundance in combination with fisher education and awareness c aigns.
Publisher: Informa UK Limited
Date: 11-03-2014
DOI: 10.3109/19401736.2014.892094
Abstract: In this manuscript we describe the first complete mitochondrial sequence for the Near Threatened Graceful Shark Carcharhinus amblyrhynchoides. It is 16,705 bp in length, consists of two rRNA genes, 22 tRNA genes, 13 protein-coding genes and one control region with the typical gene arrangement pattern and translate orientation in vertebrates. The overall base composition is 31.4% A, 25.1% C, 13.2% G and 30.3% T. The shortest tRNA-Ser2 cannot fold into a clover-leaf secondary structure due to the lack of the dihydrouridine arm.
Publisher: Public Library of Science (PLoS)
Date: 02-01-2019
Publisher: Elsevier BV
Date: 09-2014
Publisher: Magnolia Press
Date: 03-08-2016
DOI: 10.11646/ZOOTAXA.4147.2.4
Abstract: The Mumburarr Whipray, Urogymnus acanthobothrium sp. nov. is described from a single specimen taken from the Cambridge Gulf, Western Australia, and from images of 10 other specimens from northern Australia and Papua New Guinea (all observed but not collected). It is a very large ray that attains at least 161 cm disc width, making it amongst the largest of the whiprays. The ventral tail below the caudal sting has a low, short-based fold. A ventral tail fold (or a dorsal fold) has not been recorded for any other himanturin stingray in the Indo-West Pacific. Molecular data suggest it is most closely related to a similar but more widely distributed cognate, U. granulatus. Both of these species share a suboval disc shape, similar squamation patterns, and the tail posterior to the sting is entirely white (at least in small in iduals). U. acanthobothrium sp. nov. differs from U. granulatus in having a longer and more angular snout, longer tail, more posteriorly inserted caudal sting, lacks white flecks on the dorsal surface, and the ventral disc is uniformly white (rather than white with a broad black margin). It co-occurs with two other morphologically distinct Urogymnus in the region (U. asperrimus and U. dalyensis). Like U. dalyensis it occurs in both brackish and marine waters. A key is proved to the members of the genus Urogymnus.
Publisher: Elsevier BV
Date: 10-2015
Publisher: Wiley
Date: 15-10-2014
DOI: 10.1002/AQC.2525
Publisher: eLife Sciences Publications, Ltd
Date: 2014
Publisher: Wiley
Date: 13-07-2020
Publisher: IUCN SSC Shark Specialist Group
Date: 09-2023
Publisher: Inter-Research Science Center
Date: 17-02-2017
DOI: 10.3354/MEPS11995
Publisher: Springer Science and Business Media LLC
Date: 23-10-2023
Publisher: Inter-Research Science Center
Date: 06-08-2015
DOI: 10.3354/MEPS11354
Publisher: Cambridge University Press (CUP)
Date: 03-2023
Publisher: Wiley
Date: 09-03-2012
DOI: 10.1111/J.1095-8649.2012.03235.X
Abstract: Ecological risk assessments (ERAs) are employed to quantify and predict the vulnerability of a particular species, stock or population to a specific stressor, e.g. pollution, harvesting, climate change, by-catch. Data generated from ERAs are used to identify and prioritize species for implementation of effective conservation and management strategies. At this time, ERAs are of particular importance to elasmobranchs, given the ecological importance and documented global population declines of some elasmobranch species. Here, ERAs as a tool for elasmobranch conservation and management are reviewed and a theoretical roadmap provided for future studies. To achieve these goals, a brief history of ERAs and approaches used within them (in the context of elasmobranchs) are given, and a comprehensive review conducted of all ERA studies associated with elasmobranchs published between 1998 and 2011. The hazards assessed, species evaluated and methodological approaches taken are recorded. Chronological and geographical patterns suggest that this tool has grown in popularity as a commercial fishery management instrument, while also signalling a recent precautionary approach to elasmobranch management in commercial fisheries globally. The analysis demonstrates that the predominant parameters incorporated in previous ERAs are largely based on life-history characteristics, and sharks have received the majority of attention batoids (including skates) have received less attention. Recreational fishing and habitat degradation are discussed as hazards which warrant future investigation through ERA. Lastly, suggestions are made for incorporating descriptive ecological data to aid in the continued development and evolution of this management tool as it applies to future elasmobranch conservation.
Publisher: Informa UK Limited
Date: 11-05-2015
DOI: 10.3109/19401736.2015.1018208
Abstract: In this study we describe the first complete mitochondrial sequence of the Critically Endangered Smalltooth Sawfish Pristis pectinata. It is 16,802 bp in length and contains all 37 genes found in typical vertebrate mitogenomes. The nucleotide composition of the coding strand is 31.1% A, 26.0% C, 13.1% G and 28.9% T. There are 29 bp overlaps and 38 short intergenic spaces dispersed in the mitogenome. Two start codons (ATG and GTG) and two stop codons (TAG and TAA/T) were found in the protein-coding genes. The length of the 22 tRNA genes range from 67 bp (tRNA(Ser2)) to 75 bp (tRNA(Leu1)). The control region is 1102 bp in length with high A + T (62.0%) and poor G (13.5%) content.
Publisher: MDPI AG
Date: 07-04-2021
DOI: 10.3390/S21082582
Abstract: Speech assessment is an essential part of the rehabilitation procedure for patients with aphasia (PWA). It is a comprehensive and time-consuming process that aims to discriminate between healthy in iduals and aphasic patients, determine the type of aphasia syndrome, and determine the patients’ impairment severity levels (these are referred to here as aphasia assessment tasks). Hence, the automation of aphasia assessment tasks is essential. In this study, the performance of three automatic speech assessment models based on the speech dataset-type was investigated. Three types of datasets were used: healthy subjects’ dataset, aphasic patients’ dataset, and a combination of healthy and aphasic datasets. Two machine learning (ML)-based frameworks, classical machine learning (CML) and deep neural network (DNN), were considered in the design of the proposed speech assessment models. In this paper, the DNN-based framework was based on a convolutional neural network (CNN). Direct or indirect transformation of these models to achieve the aphasia assessment tasks was investigated. Comparative performance results for each of the speech assessment models showed that quadrature-based high-resolution time-frequency images with a CNN framework outperformed all the CML frameworks over the three dataset-types. The CNN-based framework reported an accuracy of 99.23 ± 0.003% with the healthy in iduals’ dataset and 67.78 ± 0.047% with the aphasic patients’ dataset. Moreover, direct or transformed relationships between the proposed speech assessment models and the aphasia assessment tasks are attainable, given a suitable dataset-type, a reasonably sized dataset, and appropriate decision logic in the ML framework.
Publisher: Wiley
Date: 24-04-2021
DOI: 10.1002/AQC.3591
Abstract: Pressures on coastal ecosystems are increasing and aquatic species that are restricted to these habitats are facing the threat of extinction. However, the true extent of many threatened and rare aquatic species, especially elasmobranchs, remains unclear due to high levels of data deficiency and poor efficacy of traditional survey methods. Sawfishes (Pristidae), a family of shark‐like rays, are among the most threatened and rare elasmobranch species and are difficult to detect in turbid, coastal habitats. Reliable cost‐effective tools to detect these species are urgently needed to increase their conservation potential. Characterization of environmental DNA (eDNA) extracted from water s les has garnered significant appeal for detection of rare and threatened species. To assist conservation and monitoring efforts for sawfishes using eDNA, species‐specific TaqMan quantitative polymerase chain reaction assays were developed and validated to detect 1.25–5 copies of a 12S rRNA gene fragment. Filter s les were collected in Northern Territory, Australia to assess the utility of the developed eDNA assays and compare the efficacy of preservation and extraction workflows for detecting rare species. Dwarf sawfish ( Pristis clavata ) were detected in three of 20 sites, and there was a significant effect of preservation and extraction workflow on total eDNA yield and subsequent detection success. Longmire's preserved s les extracted using glycogen‐aided precipitation yielded a significantly higher concentration of total eDNA ( n = 60 β = 1.27, t (95) = 8.172, P 0.0001) and yielded positive P. clavata eDNA detections compared to ethanol preserved s les extracted using QIAGEN DNeasy kit, which did not yield any positive detections. The optimized eDNA assays were developed to support monitoring efforts for endangered sawfishes. Importantly, this study demonstrates that choice of preservation and extraction workflow requires careful consideration, especially when detection of rare or threatened species can have important management and conservation outcomes.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 21-12-2022
Abstract: The viability of spatially structured populations depends on the abundance and connectivity between subpopulations of breeding adults. Yet, for many species, both are extremely difficult to assess. The speartooth shark is a critically endangered elasmobranch inhabiting tropical rivers with only three adults ever recorded in Australia. Close-kin mark-recapture models, informed by sibling pairs among 226 juveniles, were developed to estimate adult abundance and connectivity in two Australian river systems. Sixty-eight sibling pairs were found, and adult abundance was estimated at 892 for the Adelaide River and 1128 for the Alligator Rivers. We found strong evidence for female philopatry, with most females returning to the same river to pup. Adelaide River males appear largely philopatric, whereas Alligator Rivers males are highly connected to the Adelaide River. From only 4 years of s ling, our results demonstrate that juvenile-only kin pairs can inform simultaneous estimates of abundance and connectivity in a rare and threatened species.
Publisher: Wiley
Date: 09-08-2017
DOI: 10.1111/EMR.12266
Publisher: Magnolia Press
Date: 17-03-2021
DOI: 10.11646/ZOOTAXA.4947.1.1
Abstract: An annotated checklist of chondrichthyan fishes (sharks, batoids, and chimaeras) occurring in South African waters is presented. The checklist is the result of decades of research and on-going systematic revisions of the regional fauna. The chondrichthyan fauna of South Africa is one of the richest in the world with 191 species, comprising 50 families and 103 genera. It consists of 30 families, 64 genera, and 111 species of sharks 17 families, 36 genera, and 72 species of batoids and, 3 families, 5 genera, and 8 species of chimaeras. The most species-rich shark families are the whaler sharks Carcharhinidae with 20 species followed by the deepwater catsharks Pentanchidae with 13 species. The most species-rich batoid families are the hardnose stakes Rajidae with at least 21 species followed by the stingrays Dasyatidae with 13 species. This monograph represents the first detailed annotated checklist of chondrichthyans from South Africa in over 30 years.
Publisher: Inter-Research Science Center
Date: 12-05-2016
DOI: 10.3354/ESR00731
Publisher: Inter-Research Science Center
Date: 14-03-2017
DOI: 10.3354/ESR00810
Publisher: Wiley
Date: 05-08-2021
DOI: 10.1002/AQC.3678
Abstract: Sawfish (Pristidae) are considered to be among the most threatened families of elasmobranch (sharks and rays). There is a need to gather information on the status of poorly known sawfish populations to assist in global recovery initiatives. This study used interviews with local fishers to investigate the presence of sawfish in southern Papua New Guinea (PNG) and their interactions with and uses and values for small‐scale fishers. A range of sawfish size classes are still encountered throughout southern PNG, while juvenile largetooth sawfish Pristis pristis were additionally reported in the freshwater reaches of all rivers surveyed. Reports of large size classes in estuarine and marine environments provide an optimistic outlook that sawfish populations persist throughout southern PNG. Most fishers that catch sawfish retain them for various uses including consumption and for the sale of meat, fins and occasionally rostra. Negative population trends including decreases in catch frequency and/or size classes were reported by 66% of interviewees, with the largest declines being reported in the Kikori River. The increasing technical capacity of small‐scale fishers, their preference for gillnetting and the emerging market for teleost swim bladder (a high‐value fishery product) present a major ongoing threat to sawfish in southern PNG. Furthermore, the tendency of fishers to kill or remove rostra from entangled sawfish results in high fishing mortality regardless of any use by the fisher. This study indicates that considerable community engagement will be necessary to manifest any legislative actions or increased enforcement on international trade regulations for sawfish in PNG. This is due to traditional land and waterway ownership values throughout PNG and the local perception of sawfish as a traditional food resource rather than an animal of intrinsic bio ersity value as perceived by global conservationists. Future research should consider exploring culturally appropriate conservation initiatives that are likely to achieve engagement and participation from local fishers.
Publisher: Elsevier
Date: 2021
Publisher: Springer Science and Business Media LLC
Date: 10-10-2014
Publisher: Public Library of Science (PLoS)
Date: 07-10-2015
Publisher: American Association for the Advancement of Science (AAAS)
Date: 12-02-2021
Abstract: We used a novel approach to estimate the spatial contraction of sawfish populations and guide recovery efforts.
Publisher: Wiley
Date: 29-05-2016
DOI: 10.1111/JFB.13020
Abstract: Reproductive variables are provided for batoids regularly taken as by‐catch in the east coast otter‐trawl fishery on the inner‐mid continental shelf off the south‐east and central coasts of Queensland, Australia. Total length at maturity ( L T50 and 95% c.i .) for the eastern shovelnose ray Aptychotrema rostrata was 639·5 mm (617·6–663·4 mm) for females and 597·3 mm (551·4–648·6 mm) for males. Litter size ( n = 9) ranged from nine to 20 (mean ± s.e. = 15·1 ± 1·2). This species exhibited a positive litter size–maternal size relationship. Disc width at maturity ( W D50 and 95% c.i .) for the common stingaree Trygonoptera testacea was 162·7 mm (155·8–168·5 mm) for females and 145·9 mm (140·2–150·2 mm) for males. Gravid T. testacea ( n = 6) each carried a single egg in the one functional (left) uterus. Disc width at maturity ( W D50 and 95% c.i .) for the Kapala stingaree Urolophus kapalensis was 153·7 mm (145·1–160·4 mm) for females and 155·2 mm (149·1–159·1 mm) for males. Gravid U. kapalensis ( n = 16) each carried a single egg or embryo in the one functional (left) uterus. A single female yellowback stingaree Urolophus sufflavus carried an embryo in each uterus. A global review of the litter sizes of shovelnose rays (Rhinobatidae) and stingarees (Urolophidae) is provided.
Publisher: Elsevier BV
Date: 06-2016
Publisher: Springer Science and Business Media LLC
Date: 08-05-2015
Publisher: Wiley
Date: 06-2010
Publisher: Wiley
Date: 02-12-2020
DOI: 10.1111/FAF.12526
Publisher: Informa UK Limited
Date: 16-07-2013
DOI: 10.3109/19401736.2013.809443
Abstract: In this study we present the first complete mitogenome for the speartooth shark Glyphis glyphis, a rare euryhaline elasmobranch from northern Australia and Papua New Guinea. The mitogenome is 16,702 bp in length and the overall base composition is 31.5% A 26.0% C 13.0% G and 29.5% T. It includes 2 ribosomal RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, 13 protein-coding genes and a putative 1066 bp long control region. The COI gene is initiated by GTG codon whereas the remaining protein-coding genes started with the ATG codon. This study will help elucidate the taxonomy of this poorly known group of sharks.
Publisher: Wiley
Date: 07-2022
DOI: 10.1002/ECE3.9114
Abstract: The delineation of subspecies is important in the evaluation and protection of bio ersity. Subspecies delineation is h ered by inconsistently applied criteria and a lack of agreement and shifting standards on how a subspecies should be defined. The Australian endemic Yellow Chat ( Epthianura crocea ) is split into three subspecies ( E. c . crocea , E. c. tunneyi , and E. c. macgregori ) based on minor plumage differences and geographical isolation. Both E. c. tunneyi (Endangered) and E. c. macgregori (Critically Endangered) are recognized under Australian legislation as threatened and are the subject of significant conservation effort. We used mitochondrial DNA to evaluate the phylogeny of the Yellow Chat and determine how much genetic variation is present in each of the three subspecies. We found no significant difference in the cytochrome b sequences (833 base pairs) of E. c. crocea and E. c. tunneyi , but approximately 0.70% or 5.83 bp difference between E. c macgregori and both E. c. crocea and E. c. tunneyi. This analysis supports the delineation of E. c. macgregori as a valid subspecies but does not support separation of E. c. crocea from E. c. tunneyi . We also found very low levels of genetic variation within the Yellow Chat, suggesting it may be vulnerable to environmental change. Our results cast doubt upon the geographic isolation of E. c. crocea from E. c. tunneyi , but more advanced genetic sequencing and a robust comparison of plumage are needed to fully resolve taxonomy.
Publisher: Cambridge University Press (CUP)
Date: 03-05-2017
DOI: 10.1017/S0030605316000041
Abstract: Despite much effort to promote the conservation and recovery of threatened species, the extent of the current list of threatened vertebrates ( 7,600 species) underscores the need to develop novel communication and marketing tools to raise awareness and funding for their conservation. Although flagship species have been widely used in conservation marketing, the flagship role of extinct species has been largely overlooked and the status of lost species is rarely associated with the status of extant species facing a high risk of extinction. Some extinct species (e.g. the dodo Raphus cucullatus and the thylacine Thylacinus cynocephalus ) are cultural and commercial icons and therefore familiar, and may appeal to the public as conservation flagships. We propose a wider use of extinct flagships to raise awareness for the conservation of threatened species by making a direct link between already extinct species and extant species at risk of extinction. We present ex les of publicly recognized and iconic extinct species that could be used in marketing for the conservation of threatened species. These extinct species are familiar and may be readily linked to threatened species or species groups. We outline a roadmap for testing their appeal under the extinct flagship concept, through market research. If research identifies that a cognitive link is made between the fate of an extinct species (i.e. they went extinct from human causes) and what may happen to threatened species (i.e. they are at risk of extinction from human causes), extinct species may well have a wider role to play as conservation flagships.
Publisher: Wiley
Date: 23-08-2020
DOI: 10.1002/AQC.3400
Publisher: Informa UK Limited
Date: 18-09-2014
DOI: 10.3109/19401736.2014.958682
Abstract: The complete mitochondrial genome of the Freshwater Whipray Himantura dalyensis is presented in this study. It is 17,693 bp in length and contains 37 genes in typical gene order and transcriptional orientation observed in vertebrates. There were a total of 86 bp short intergenic spacers and 22 bp overlaps in the genome. The overall base composition was 31.4% A, 25.5% C, 13.2% G and 29.9% T. Two start codons (GTG and ATG) and two stop codons (TAG and TAA/T) were found in 13 protein-coding genes. The length of 22 tRNA genes ranged from 68 (tRNA-Cys and tRNA-Ser2) to 75 bp (tRNA-Leu1). The origin of L-strand replication (OL) was found between the tRNA-Asn and tRNA-Cys genes. The base composition of the control region (1940 bp) was similar to the whole mitogenome.
Publisher: Wiley
Date: 03-09-2021
DOI: 10.1111/JFD.13523
Abstract: Tilapia tilapinevirus (also known as tilapia lake virus, TiLV) is considered to be a new threat to the global tilapia industry. The objective of this study was to develop simple cell culture‐based heat‐killed (HKV) and formalin‐killed (FKV) vaccines for the prevention of disease caused by TiLV. The fish were immunized with 100 µl of either HKV or FKV by intraperitoneal injection with each vaccine containing 1.8 × 10 6 TCID 50‐ inactivated virus. A booster vaccination was carried out at 21‐day post‐vaccination (dpv) using the same protocol. The fish were then challenged with a lethal dose of TiLV at 28 dpv. The expression of five immune genes ( IgM , IgD , IgT , CD4 and CD8 ) in the head kidney and spleen of experimental fish was assessed at 14 and 21 dpv and again after the booster vaccination at 28 dpv. TiLV‐specific IgM responses were measured by ELISA at the same time points. The results showed that both vaccines conferred significant protection, with relative percentage survival of 71.3% and 79.6% for HKV and FKV, respectively. Significant up‐regulation of IgM and IgT was observed in the head kidney of fish vaccinated with HKV at 21 dpv, while IgM , IgD and CD4 expression increased in the head kidney of fish receiving FKV at the same time point. After booster vaccination, IgT and CD8 transcripts were significantly increased in the spleen of fish vaccinated with the HKV, but not with FKV. Both vaccines induced a specific IgM response in both serum and mucus. In summary, this study showed that both HKV and FKV are promising injectable vaccines for the prevention of disease caused by TiLV in Nile tilapia.
Publisher: Inter-Research Science Center
Date: 25-08-2009
DOI: 10.3354/ESR00206
Publisher: Elsevier
Date: 2022
Publisher: CRC Press
Date: 09-03-2010
Publisher: CSIRO Publishing
Date: 19-06-2023
DOI: 10.1071/WF22173
Abstract: Background The coastal floodplains of northern Australia are fire-prone, but the impact of fire on floodplain biota is not well understood. Aims In this study, we sought to characterise the fire history of six adjacent floodplains in coastal Northern Territory, Australia. Methods We built a fine-scale 31-year fire history (1988–2018) to compare fire regimes on floodplains across land tenures and floodplain fire regimes with the surrounding savanna fire regime, determine the extent to which current fire regimes are meeting existing ecological fire thresholds, and investigate the relationship between rainfall totals and the extent of burning. Key results Floodplains in conservation reserves burnt more frequently than those on pastoral lands, and savannas burnt more often than floodplains. Current floodplain fire regimes comfortably meet existing ecological fire thresholds. The proportion of floodplain burning is inversely proportional to the amount of rain in the previous wet season. Conclusions Floodplain fire regimes vary markedly between land-use types, and floodplain fire regimes differ to those of savannas. The current management thresholds for floodplain fire regimes would benefit from further evidence of conservation outcomes. Implications For more effective floodplain fire management, research is needed to generate floodplain-specific thresholds that best conserve their considerable conservation value.
Publisher: Springer Science and Business Media LLC
Date: 11-02-2015
DOI: 10.1038/518167E
Publisher: Elsevier BV
Date: 2015
Publisher: Inter-Research Science Center
Date: 28-01-2021
DOI: 10.3354/ESR01090
Abstract: The largetooth sawfish Pristis pristis is a Critically Endangered, once widespread shark-like ray. The species is now extinct or severely depleted in many former parts of its range and is protected in some other range states where populations persist. The likelihood of collecting substantial new biological information is now low. Here, we review all available life history information on size, age and growth, reproductive biology, and demography as a resource for population assessment and demographic modelling. We also revisit a subset of historical data from the 1970s to examine the maternal size-litter size relationship. All available information on life history is derived from the Indo-West Pacific (i.e. northern Australia) and the Western Atlantic (i.e. Lake Nicaragua-Río San Juan system in Central America) subpopulations. P. pristis reaches a maximum size of at least 705 cm total length (TL), size-at-birth is 72-90 cm TL, female size-at-maturity is reached by 300 cm TL, male size-at-maturity is 280-300 cm TL, age-at-maturity is 8-10 yr, longevity is 30-36 yr, litter size range is 1-20 (mean of 7.3 in Lake Nicaragua), and reproductive periodicity is suspected to be biennial in Lake Nicaragua (Western Atlantic) but annual in Australia (Indo-West Pacific). There was a weak relationship between litter size and maternal size in Lake Nicaragua, and lifetime reproductive output for an in idual female from Lake Nicaragua was estimated as 73 pups. Future demographic models should aim to capture the variability and uncertainty in life history parameters for P. pristis and we encourage a conservative approach to any application for conservation and management.
Publisher: Springer Science and Business Media LLC
Date: 27-01-2021
DOI: 10.1038/S41586-020-03173-9
Abstract: Overfishing is the primary cause of marine defaunation, yet declines in and increasing extinction risks of in idual species are difficult to measure, particularly for the largest predators found in the high seas
Publisher: Magnolia Press
Date: 20-07-2016
DOI: 10.11646/ZOOTAXA.4139.2.7
Abstract: A new dwarf wedgefish, Rhynchobatus cooki sp. nov. is described from a single female from a Jakarta fish market (Indonesia) and 11 specimens collected at Jurong fish market (Singapore). First collected in 1934, the broader ichthyological community have been aware of this distinctive but little known ray since the late 1990's. Rhynchobatus cooki is the smallest of the wedgefishes (to 81 cm TL) and has the lowest vertebral count (fewer than 107 centra). It is also distinguishable from its congeners based on its long, hastate snout, very strongly undulate anterior pectoral-fin margin, coloration and aspects of its squamation. The dorsal coloration is mainly dark and distinctively marked with white blotches, spots and streaks, and has a dark cruciate marking on the interorbit and a prominent white border around the body margin. Unlike most other wedgefish species, the snout tip lacks dark blotches and there is no black pectoral-fin marking. It shares well-developed rostral spines with a much larger Atlantic species (Rhynchobatus luebberti), but these spines are confined to the snout tip (rather than being more numerous and extending in paired rows along the rostral ridges nearly to the eyes). No additional specimens have been observed since 1996, despite an increased recent effort to survey the chondrichthyan fauna of South-East Asia and collect biological data for species, raising concerns over its conservation status.
Publisher: Wiley
Date: 08-09-2023
DOI: 10.1111/JFB.15537
Abstract: River sharks ( Glyphis spp.) and some sawfishes (Pristidae) inhabit riverine environments, although their long‐term habitat use patterns are poorly known. We investigated the diadromous movements of the northern river shark ( Glyphis garricki ), speartooth shark ( Glyphis glyphis ), narrow sawfish ( Anoxypristis cuspidata ), and largetooth sawfish ( Pristis pristis ) using in situ laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) on vertebrae to recover elemental ratios over each in idual's lifetime. We also measured elemental ratios for the bull shark ( Carcharhinus leucas ) and a range of inshore and offshore stenohaline marine species to assist in interpretation of results. Barium (Ba) was found to be an effective indicator of freshwater use, while lithium (Li) and strontium (Sr) were effective indicators of marine water use. The relationships between Ba and Li, and Ba and Sr were negatively correlated, while the relationship between Li and Sr was positively correlated. Both river shark species had elemental signatures indicative of prolonged use of upper estuarine environments, while adults appear to mainly use lower estuarine environments rather than marine. Decreases in Li:Ba and Sr:Ba at the end of the pre‐natal growth zone of P. pristis s les indicated that parturition likely occurs in freshwater. There was limited evidence of prolonged riverine habitat use for A. cuspidata . The results of this study support elemental‐environment relationships observed in teleost otoliths, and indicate that in situ LA‐ICP‐MS elemental characterization is applicable to a wide range of elasmobranch species as a discriminator for use and movement across salinity gradients. A greater understanding of processes that lead to element incorporation in vertebrae, and relative concentrations in vertebrae with respect to the ambient environment, will improve the applicability of elemental analysis to understand movements across the life history of elasmobranchs into the future. This article is protected by copyright. All rights reserved.
Publisher: CRC Press
Date: 02-05-2022
Publisher: CSIRO Publishing
Date: 2011
DOI: 10.1071/MF10160
Abstract: Despite increasing research effort and conservation focus on sharks, small species of little commercial value are often overlooked, although they make a considerable contribution to global ersity. The poorly known Colclough’s shark, Brachaelurus colcloughi, is naturally rare to uncommon and is encountered only irregularly. Collating all known records (n = 50), we review the species’ geographic and bathymetric distribution, habitat, reproductive biology and diet. All but four B. colcloughi records are from within a core distribution of ° latitude on the Australian east coast. Bathymetric distribution is from less than 4 to 217 m depth, with all but three records from less than 100 m depth. The species shelters on rocky reefs during the day and is thought to forage nocturnally around reefs and adjacent substrates. B. colcloughi is viviparous, with litter sizes of 6–7. Mature males and females have been observed from 61.0- and 54.5-cm total length, respectively. Gravid females have been collected in austral winter months. Dietary analysis indicates a predominantly piscivorous diet. Our results are placed in the context of existing threats and future research and management directions, demonstrating that shark species with low abundances and restricted ranges, such as B. colcloughi, require a suite of management arrangements to ensure long-term population viability.
Publisher: Elsevier BV
Date: 09-2021
Publisher: Springer Science and Business Media LLC
Date: 12-10-2018
Publisher: Universidad de Valparaiso Chile
Date: 04-10-2022
DOI: 10.22370/RBMO.2022.57.ESPECIAL.3419
Abstract: The Sharpfin Houndshark, Triakis acutipinna, was described in 1968 from a specimen captured from Isla de la Plata, Ecuador. Since then, there have been no confirmed records of the species. To investigate the contemporary occurrence of this ‘lost shark’, a multi-pronged approach was undertaken. This included a literature review, development of an educational poster, and conducting a small number of informal fisher interviews in five coastal communities of Manabí province, Ecuador. Half of the fishers interviewed recognized T. acutipinna and reported its capture as recently as 2010-2015. Despite the preliminary nature of the present study, it suggests that the lost shark of Ecuador persists.
Publisher: Frontiers Media SA
Date: 13-09-2022
DOI: 10.3389/FMARS.2022.968853
Abstract: Area-based conservation is essential to safeguard declining bio ersity. Several approaches have been developed for identifying networks of globally important areas based on the delineation of sites or seascapes of importance for various elements of bio ersity (e.g., birds, marine mammals). Sharks, rays, and chimaeras are facing a bio ersity crisis with an estimated 37% of species threatened with extinction driven by overfishing. Yet spatial planning tools often fail to consider the habitat needs critical for their survival. The Important Shark and Ray Area (ISRA) approach is proposed as a response to the dire global status of sharks, rays, and chimaeras. A set of four globally standardized scientific criteria, with seven sub-criteria, was developed based on input collated during four shark, bio ersity, and policy expert workshops conducted in 2022. The ISRA Criteria provide a framework to identify discrete, three-dimensional portions of habitat important for one or more shark, ray, or chimaera species, that have the potential to be delineated and managed for conservation. The ISRA Criteria can be applied to all environments where sharks occur (marine, estuarine, and freshwater) and consider the ersity of species, their complex behaviors and ecology, and biological needs. The identification of ISRAs will guide the development, design, and application of area-based conservation initiatives for sharks, rays, and chimaeras, and contribute to their recovery.
Publisher: Springer Science and Business Media LLC
Date: 19-11-2014
Location: Switzerland
No related grants have been discovered for Peter Kyne.