ORCID Profile
0000-0002-3525-1665
Current Organisations
Nottingham Trent University - Clifton Campus
,
Edith Cowan University
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Marine And Estuarine Ecology (Incl. Marine Ichthyology) | Molecular Evolution | Life Histories (Incl. Population Ecology) | Conservation And Biodiversity | Ecology | Population And Ecological Genetics | Genetics
Living resources (incl. impacts of fishing on non-target species) | Higher education | Marine protected areas | Environmental and resource evaluation not elsewhere classified |
Publisher: Elsevier BV
Date: 03-2013
Publisher: Oxford University Press (OUP)
Date: 03-2019
Abstract: This review shows that the presence of seagrass microbial community is critical for the development of seagrasses from seed germination, through to phytohormone production and enhanced nutrient availability, and defence against pathogens and saprophytes. The tight seagrass-bacterial relationship highlighted in this review supports the existence of a seagrass holobiont and adds to the growing evidence for the importance of marine eukaryotic microorganisms in sustaining vital ecosystems. Incorporating a micro-scale view on seagrass ecosystems substantially expands our understanding of ecosystem functioning and may have significant implications for future seagrass management and mitigation against human disturbance.
Publisher: Inter-Research Science Center
Date: 24-05-2007
DOI: 10.3354/MEPS338097
Publisher: Inter-Research Science Center
Date: 02-12-2008
DOI: 10.3354/AB00107
Publisher: CSIRO Publishing
Date: 2011
DOI: 10.1071/MF10232
Abstract: Spatial closure management is a strategy used throughout the world for a range of goals, including protecting aquatic bio ersity and promoting fish production. However, benefits of freshwater protected areas (FPAs) have seldom been assessed. The present study is, therefore, one of the few that has compared the abundances, biomass and size structure of fish species between a FPA and the adjacent fished area. Fish assemblages in a large freshwater sw (Beung Borapet) in Thailand were s led with fish traps to test the hypothesis that the FPA would enhance fisheries production and bio ersity. Total densities and biomass of fish did not differ or were inconsistent between FPA and the fished area, and these patterns were inconsistent among several dominant species. Only one dominant species had higher densities and biomass in the FPA, which also did not appear to result in an increase in the size of fish. The benefits of the FPA for fisheries enhancement and conservation of bio ersity are inconsistent and appear to be compromised by a combination of non-selective fishing methods, illegal fishing activities and point-source impacts from other human disturbances. Spatial management therefore needs to be tailored to the socioeconomic structure of the community, resource availability for compliance, and multiple management-agency objectives.
Publisher: Wiley
Date: 14-07-2017
DOI: 10.1111/FAF.12237
Publisher: Springer International Publishing
Date: 2018
Publisher: Elsevier BV
Date: 07-2003
Publisher: Inter-Research Science Center
Date: 20-01-2012
DOI: 10.3354/MEPS09367
Publisher: Elsevier BV
Date: 10-2007
Publisher: Springer International Publishing
Date: 2018
Publisher: Elsevier BV
Date: 08-2015
Publisher: Informa UK Limited
Date: 09-2015
DOI: 10.2216/15-39.1
Publisher: Elsevier BV
Date: 04-2006
Publisher: Elsevier BV
Date: 11-2005
Publisher: Inter-Research Science Center
Date: 24-01-2006
DOI: 10.3354/MEPS307233
Publisher: Inter-Research Science Center
Date: 29-04-2010
DOI: 10.3354/MEPS08516
Publisher: CSIRO Publishing
Date: 09-02-2022
DOI: 10.1071/MF21131
Abstract: The use of geostatistical indices to examine fishery-dependent data over time is novel. We assess the value of a range of these indices for describing trends in boat-based recreational fishing in Western Australia and areas of high effort and catches for two demersal species with varying biological characteristics, life histories and distributions. The number of blocks (10- × 10-nautical mile (~19- × 19-km) area) visited decreased by 40%, while the number of fishing trips with demersal species catch increased by 15%. Spatial indices showed a south-easterly shift in demersal catch per unit effort (CPUE) across survey years. The southerly shift of West Australian dhufish (Glaucosoma herbraicum) CPUE and subsequent return to the north likely to reflect the response of this temperate species to a marine heatwave. In comparison, CPUE of retained Baldchin groper (Choerodon rubescens) shifted north, whereas released catches shifted south with high probabilities of hotspots present associated with habitat structure. We identified hotspots of retained and released CPUE, highlighting potential areas where species experience high post-release mortality through barotrauma, and targeted spatial management strategies. Spatial indices allow quantitative definition of the structure of the fishery, identify high catch areas, and assess changes over time at a broader scale to sustainably manage multispecies fisheries.
Publisher: Oxford University Press (OUP)
Date: 14-09-2016
Publisher: MDPI AG
Date: 03-12-2020
DOI: 10.3390/TECHNOLOGIES8040074
Abstract: Falls are the main cause of susceptibility to severe injuries in many humans, especially for older adults aged 65 and over. Typically, falls are being unnoticed and interpreted as a mere inevitable accident. Various wearable fall warning devices have been created recently for older people. However, most of these devices are dependent on local data processing. Various algorithms are used in wearable sensors to track a real-time fall effectively, which focuses on fall detection via fuzzy-as-a-service based on IEEE 1855–2016, Java Fuzzy Markup Language (FML) and service-oriented architecture. Moreover, several approaches are used to detect a fall using machine learning techniques via human movement positional data to avert any accidents. For fuzzy logic web services, analysis is performed using wearable accelerometer and gyroscope sensors, whereas in machine learning techniques, k-NN, decision tree, random forest and extreme gradient boost are used to differentiate between a fall and non-fall. This study aims to carry out a comparative analysis of real-time fall detection using fuzzy logic web services and machine learning techniques and aims to determine which one is better for real-time fall detection. Research findings exhibit that the proposed fuzzy-as-a-service could easily differentiate between fall and non-fall occurrences in a real-time environment with an accuracy, sensitivity and specificity of 90%, 88.89% and 91.67%, respectively, while the random forest algorithm of machine learning achieved 99.19%, 98.53% and 99.63%, respectively.
Publisher: Springer Science and Business Media LLC
Date: 16-08-2006
Publisher: Springer Science and Business Media LLC
Date: 20-05-1997
Publisher: ACM
Date: 05-07-2023
Publisher: Elsevier BV
Date: 10-2003
Publisher: Elsevier BV
Date: 04-2021
Publisher: CSIRO Publishing
Date: 2007
DOI: 10.1071/MF05234
Abstract: In total, 7497 sandbar sharks, Carcharhinus plumbeus (Nardo, 1827), were collected between May 2000 and June 2003 from commercial fishers and during fishery-independent research cruises in coastal Western Australian waters. Maximum observed lengths were 165 and 166 cm fork length (FL) for males and females respectively. The lengths at which 50% of sharks were mature were 126.9 and 135.9 cm FL for males and females respectively. Juvenile sharks tended to occur in temperate waters, whereas mature-sized sharks predominantly occurred in tropical waters. Unlike other regions, juveniles were found in offshore continental shelf waters rather than in shallow waters of estuaries and marine embayments. Results indicated a biennial reproductive periodicity. Mating occurred during summer and autumn, and parturition took place after a 12-month gestation. Pups were born at 40 to 45 cm FL throughout most of the species’ Western Australian range. The majority of neonates were caught at temperate latitudes. Litter sizes varied between 4 and 10, with a mean of 6.5. There was a weak but statistically significant increase in litter size with maternal length. Mean embryonic sex ratio of females to males differed significantly from a one-to-one ratio.
Publisher: Elsevier BV
Date: 06-2016
Publisher: Inter-Research Science Center
Date: 06-11-2017
DOI: 10.3354/MEPS12321
Publisher: Springer Science and Business Media LLC
Date: 08-1997
Publisher: Springer Science and Business Media LLC
Date: 27-06-2021
Publisher: Springer Science and Business Media LLC
Date: 12-1994
DOI: 10.1007/BF00346727
Publisher: Elsevier BV
Date: 08-2010
Publisher: Elsevier BV
Date: 09-2016
Publisher: Inter-Research Science Center
Date: 11-02-2009
DOI: 10.3354/MEPS07810
Publisher: Elsevier BV
Date: 07-1997
Publisher: Springer Science and Business Media LLC
Date: 05-05-2011
Publisher: Springer Science and Business Media LLC
Date: 22-05-2019
Publisher: Elsevier BV
Date: 06-2009
Publisher: Wiley
Date: 07-1996
Publisher: Inter-Research Science Center
Date: 22-05-2013
DOI: 10.3354/MEPS10262
Publisher: Wiley
Date: 26-08-2013
DOI: 10.1111/BRV.12055
Abstract: Worldwide, coastal systems provide some of the most productive habitats, which potentially influence a range of marine and terrestrial ecosystems through the transfer of nutrients and energy. Several reviews have examined aspects of connectivity within coastal seascapes, but the scope of those reviews has been limited to single systems or single vectors. We use the transfer of carbon to examine the processes of connectivity through multiple vectors in multiple ecosystems using four coastal seascapes as case studies. We discuss and compare the main vectors of carbon connecting different ecosystems, and then the natural and human-induced factors that influence the magnitude of effect for those vectors on recipient systems. Vectors of carbon transfer can be grouped into two main categories: detrital particulate organic carbon (POC) and its associated dissolved organic and inorganic carbon (DOC/DIC) that are transported passively and mobile consumers that transport carbon actively. High proportions of net primary production can be exported over meters to hundreds of kilometers from seagrass beds, algal reefs and mangroves as POC, with its export dependent on wind-generated currents in the first two of these systems and tidal currents for the last. By contrast, saltmarshes export large quantities of DOC through tidal movement, while land run-off plays a critical role in the transport of terrestrial POC and DOC into temperate fjords. Nekton actively transfers carbon across ecosystem boundaries through foraging movements, ontogenetic migrations, or 'trophic relays', into and out of seagrass beds, mangroves or saltmarshes. The magnitude of these vectors is influenced by: the hydrodynamics and geomorphology of the region the characteristics of the carbon vector, such as their particle size and buoyancy and for nekton, the extent and frequency of migrations between ecosystems. Through a risk-assessment process, we have identified the most significant human disturbances that affect the integrity of connectivity among ecosystems. Loss of habitat, net primary production (NPP) and overfishing pose the greatest risks to carbon transfer in temperate saltmarsh and tropical estuaries, particularly through their effects on nekton abundance and movement. In comparison, habitat/NPP loss and climate change are likely to be the major risks to carbon transfer in temperate fjords and temperate open coasts through alteration in the amount of POC and/or DOC/DIC being transported. While we have highlighted the importance of these vectors in coastal seascapes, there is limited quantitative data on the effects of these vectors on recipient systems. It is only through quantifying those subsidies that we can effectively incorporate complex interactions into the management of the marine environment and its resources.
Publisher: Springer Science and Business Media LLC
Date: 05-07-2018
Publisher: Elsevier BV
Date: 06-2005
Publisher: Wiley
Date: 05-10-2016
DOI: 10.1111/DDI.12495
Publisher: Springer Science and Business Media LLC
Date: 09-01-2007
Publisher: CSIRO Publishing
Date: 2015
DOI: 10.1071/MF13209
Abstract: To inform management, baseline ecological studies in estuaries must be implemented at spatial scales that accommodate both environmental gradients and likely anthropogenic pressures. We describe fine-scale spatial patterns in the abundances and size structure of large infaunal bivalves inhabiting shallow sand habitats in the lower reaches of a relatively undisturbed, permanently open, temperate estuary. S ling over 3 years at 19 sites during the autumn, when freshwater influence was minimal, revealed that Soletellina alba, Wallucina assimilis and Paphies elongata were consistently the most abundant of nine species present. Although most abundant near the ocean entrance, S. alba was distributed widely and shells of differing lengths, and presumably ages, were present at most sites, suggesting that this species recruited continuously throughout the study area when conditions were appropriate. In contrast, W. assimilis and P. elongata occurred only near or in the entrance channel of the Nornalup Inlet in areas where seagrass rhizomes may grow and where oceanic influences caused relatively turbulent conditions, respectively. Sediment structure appeared to exert only a moderate and intermittent influence on the bivalve assemblage at some sites where particularly large grain sizes occurred. This study provides important baseline information on the distribution and abundance of large bivalves in this estuary. These species are likely to be important in the trophic ecology of this system and are potential indicators of disturbance and ecosystem health.
Publisher: Springer Science and Business Media LLC
Date: 04-11-2015
Publisher: Elsevier BV
Date: 2007
Publisher: Elsevier BV
Date: 05-2015
Publisher: Wiley
Date: 06-1992
Publisher: Wiley
Date: 11-08-2022
DOI: 10.1111/BRV.12886
Abstract: Sandy beaches are iconic interfaces that functionally link the ocean with the land via the flow of organic matter from the sea. These cross-ecosystem fluxes often comprise uprooted seagrass and dislodged macroalgae that can form substantial accumulations of detritus, termed 'wrack', on sandy beaches. In addition, the tissue of the carcasses of marine animals that regularly wash up on beaches form a rich food source ('carrion') for a ersity of scavenging animals. Here, we provide a global review of how wrack and carrion provide spatial subsidies that shape the structure and functioning of sandy-beach ecosystems (sandy beaches and adjacent surf zones), which typically have little in situ primary production. We also examine the spatial scaling of the influence of these processes across the broader land- and seascape, and identify key gaps in our knowledge to guide future research directions and priorities. Large quantities of detrital kelp and seagrass can flow into sandy-beach ecosystems, where microbial decomposers and animals process it. The rates of wrack supply and its retention are influenced by the oceanographic processes that transport it, the geomorphology and landscape context of the recipient beaches, and the condition, life history and morphological characteristics of the macrophyte taxa that are the ultimate source of wrack. When retained in beach ecosystems, wrack often creates hotspots of microbial metabolism, secondary productivity, bio ersity, and nutrient remineralization. Nutrients are produced during wrack breakdown, and these can return to coastal waters in surface flows (swash) and aquifers discharging into the subtidal surf. Beach-cast kelp often plays a key trophic role, being an abundant and preferred food source for mobile, semi-aquatic invertebrates that channel imported algal matter to predatory invertebrates, fish, and birds. The role of beach-cast marine carrion is likely to be underestimated, as it can be consumed rapidly by highly mobile scavengers (e.g. foxes, coyotes, raptors, vultures). These consumers become important vectors in transferring marine productivity inland, thereby linking marine and terrestrial ecosystems. Whilst deposits of organic matter on sandy-beach ecosystems underpin a range of ecosystem functions and services, they can be at variance with aesthetic perceptions resulting in widespread activities, such as 'beach cleaning and grooming'. This practice diminishes the energetic base of food webs, intertidal fauna, and bio ersity. Global declines in seagrass beds and kelp forests (linked to global warming) are predicted to cause substantial reductions in the amounts of marine organic matter reaching many beach ecosystems, likely causing flow-on effects for food webs and bio ersity. Similarly, future sea-level rise and increased storm frequency are likely to alter profoundly the physical attributes of beaches, which in turn can change the rates at which beaches retain and process the influxes of wrack and animal carcasses. Conservation of the multi-faceted ecosystem services that sandy beaches provide will increasingly need to encompass a greater societal appreciation and the safeguarding of ecological functions reliant on beach-cast organic matter on innumerable ocean shores worldwide.
Publisher: Springer Science and Business Media LLC
Date: 07-07-1999
Publisher: Elsevier BV
Date: 09-2007
DOI: 10.1016/J.MARENVRES.2007.02.002
Abstract: Saltmarsh vegetation, seston and microphytobenthos are all conspicuous components of most temperate estuaries and they potentially contribute to the estuarine food chain. Yet their relative contributions are unclear, as is the significance of saltmarsh losses through natural and human-induced impacts. This study aimed to quantitatively determine the contribution of various types of primary producers to detritus in the Walpole-Nornalup Estuary and Leschenault Inlet, two permanently open estuaries in SW Australia, and, estimate the flow of different types of detritus to higher trophic levels, using carbon ((13)C) and nitrogen ((15)N) stable isotopes as tracers. Results of the mixing model indicated that seston, microphytobenthos and to some extent seagrass and fringing saltmarsh were the main contributors to the detrital pool in both estuaries. However, the relative contribution of different primary producers varied both within and between estuaries. The contribution of saltmarsh was higher at sites close to rivers and dense fringing vegetation, while seston, microphytobenthos and seagrass dominated the detrital material at other sites. Benthic harpacticoid copepods were shown to feed on detritus though they appeared to actively select for different components of the detritus depending on site and estuary. Isotopic signatures of other consumers indicated that fish and invertebrates derived nutrients from MPB and detritus, either directly as food or indirectly through feeding on invertebrates. The overall contribution of saltmarsh to detritus was lower in Leschenault Inlet than in Walpole-Nornalup Estuary, possibly as a result of increased clearing of fringing vegetation around Leschenault Inlet. This pattern was however not reflected in harpacticoid food. Therefore, although losses of fringing saltmarsh around estuaries have the potential to significantly affect estuarine food webs, the significance of such losses will be site- and estuary-dependent.
Publisher: Informa UK Limited
Date: 06-2006
Publisher: Elsevier BV
Date: 11-2019
Publisher: Elsevier BV
Date: 02-2016
Publisher: Springer Science and Business Media LLC
Date: 06-1995
DOI: 10.1007/BF00350675
Publisher: Springer Science and Business Media LLC
Date: 04-2005
Publisher: Wiley
Date: 02-1997
Publisher: Elsevier BV
Date: 03-2001
DOI: 10.1016/S0022-0981(00)00343-9
Abstract: Fish were collected from the intake screens of the Oldbury Power Station in the Severn Estuary in each week between early July 1972 and late June 1977 and at least twice monthly between early January 1996 and late June 1999. The annual catches, after adjustment to a common s ling effort, demonstrate that the abundance of fish at Oldbury was far greater in the 1990s than 1970s, mainly due to marked increases in the numbers of certain marine species, such as sand goby, whiting, bass, thin-lipped grey mullet, herring, sprat and Norway pout. These increases may reflect the great improvement that occurred in the water quality of the Severn Estuary between these decades. The only species that declined markedly in abundance was poor cod. Modest declines in flounder and River l rey paralleled those occurring elsewhere in the UK. The species composition in the two decades also differed, reflecting changes not only in the relative abundances of the various marine estuarine-opportunistic species, which dominated the ichthyofauna, but also in those of the suite of less abundant species in the estuary. The cyclical changes undergone each year by the species composition of the fish fauna of the Severn Estuary reflect sequential intra-annual changes in the relative abundances of species representing each of the marine, diadromous and freshwater categories. New approaches have been developed to test whether or not large sets of correlations between patterns of recruitment amongst abundant marine species (internal correlations), and between those patterns and salinity and water temperature within the estuary (cross-correlations), were significant. The correlation profile analyses found no evidence that the annual recruitment strengths of these species were either intercorrelated, or correlated with either one or a combination of both of the above environmental variables. Yet, the timings of the recruitment of these species into the estuary were intercorrelated, i.e. a slightly earlier or later than normal immigration by one species in a given year was paralleled by the same trend in other species. However, this association in recruitment times could be linked neither to salinity nor water temperature within the estuary, nor to a combination of these two variables. These results indicate that, while the factors that influence the annual recruitment strengths of the juveniles of different marine species vary, inter-annual differences in the phasing of events that regulate spawning times and/or larval dispersal influence, in the same direction, the times when marine species are recruited into the estuary.
Publisher: Elsevier BV
Date: 08-2007
Publisher: CSIRO Publishing
Date: 2010
DOI: 10.1071/MF09178
Abstract: Meiofauna are often important in the transfer of organic material to higher trophic levels in aquatic environments. However, in food web analysis the group is frequently pooled or ignored owing to the difficulty in isolating in idual components of the assemblage. In this study, we developed and tested a new method for extracting photopositive and detritus-free copepod s les from sediments, and compared this method to a previous technique (Couch 1989). In our initial trials, ∼400 copepods (all orders included) were collected in 15 min compared with 60 copepods using Couch’s method. In subsequent trials that focussed on specific orders of copepods, our method was at least 10 times more efficient than Couch’s method at collecting cyclopoid and harpacticoid copepods from sediments. The new method requires very little supervision and there is no requirement for a particular intensity of light. This method can increase the collection of large numbers of photopositive copepods in aquatic systems, and thereby facilitate the inclusion of this important component into future food web studies, particularly those using biomarkers such as stable isotopes or fatty acids.
Publisher: Elsevier BV
Date: 09-2009
Publisher: Elsevier BV
Date: 08-2019
Publisher: Inter-Research Science Center
Date: 31-08-2011
DOI: 10.3354/MEPS09256
Publisher: Elsevier BV
Date: 2001
Publisher: Springer Science and Business Media LLC
Date: 1996
DOI: 10.1007/BF00000625
Publisher: Inter-Research Science Center
Date: 08-04-2013
DOI: 10.3354/MEPS10327
Publisher: Inter-Research Science Center
Date: 12-07-2013
DOI: 10.3354/MEPS10325
Publisher: Springer Science and Business Media LLC
Date: 26-06-1997
Publisher: Springer Science and Business Media LLC
Date: 09-1992
DOI: 10.2307/1352780
Publisher: Public Library of Science (PLoS)
Date: 11-02-2011
Publisher: Springer Science and Business Media LLC
Date: 05-1993
DOI: 10.1007/BF00350727
Publisher: Wiley
Date: 29-04-2014
DOI: 10.1111/OIK.01382
Publisher: Springer Science and Business Media LLC
Date: 21-04-2017
Publisher: CSIRO Publishing
Date: 2008
DOI: 10.1071/MF07239
Abstract: Understanding the residency and movement patterns of major consumers, such as lobsters, in coastal waters is important for the management of coastal habitats and their fisheries. In the present study, we tagged 34 Panulirus cygnus with acoustic transmitters on a shallow coastal reef in south-western Australia and monitored their movements using fixed and manual receivers between November and May 2005–2006 and 2006–2007. We determined the proportion of ‘white’ (migratory-phase) lobsters emigrating from the reef between November and January and also characterised the large-scale movements of ‘red’ (residential-phase) and white lobsters. We undertook tank experiments to determine the effect of tagging and handling on P. cygnus behaviour. Counter to our expectation, 50% of white lobsters were detected on the reef after the migration period, whereas only a small proportion (13.6%) of white lobsters were tracked leaving the reef and only one in idual displayed directional offshore movement. This limited movement indicates that coastal no-take zones may build up legal-sized 4–5+ year old lobsters because many of these are likely to remain resident over the migration season. Laboratory experiments and field observations suggest that tagging and handling affect lobster behaviour and movement for a few days post tagging, potentially confounding conclusions on dispersal and movement patterns in some studies.
Publisher: Inter-Research Science Center
Date: 16-03-2015
DOI: 10.3354/MEPS11173
Location: India
Location: United Kingdom of Great Britain and Northern Ireland
Start Date: 11-2004
End Date: 11-2007
Amount: $70,668.00
Funder: Australian Research Council
View Funded ActivityStart Date: 08-2003
End Date: 12-2006
Amount: $82,000.00
Funder: Australian Research Council
View Funded Activity