ORCID Profile
0000-0002-0519-4030
Current Organisations
NSW Department of Primary Industries
,
Southern Cross University
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Publisher: Oxford University Press (OUP)
Date: 13-06-2018
Abstract: The giant Australian cuttlefish, Sepia apama, forms a dense spawning aggregation at a single known location across its wide southern Australian distribution. After a rapid increase in fishing pressure on the aggregation in the late 1990s, a series of fishing closures were introduced before any biological information could be collected. We surveyed the habitats, timing, and spatial distribution of the spawning aggregation over 4 years, using underwater visual transects and passive tagging, to assess the suitability of the closures. We found that the annual aggregation was both temporally (April–August) and spatially (over 8 km of coastline) localized and predictable, with a consistent peak in abundances in late May–early June. Cuttlefish densities were generally highest over the shallow, broken bedrock habitat, which was more extensive in several sites left open to fishing. Although the original closure covered about 43% of the hard substrate, it accounted for only 23–37% of the total cuttlefish abundance. The extremely high densities recorded during this study verified that this is a massive spawning aggregation for cuttlefish species worldwide, and that it could be highly vulnerable to overexploitation in the absence of adequate protection, because it is so spatiotemporally predictable and localized.
Publisher: Elsevier BV
Date: 11-1997
Publisher: Public Library of Science (PLoS)
Date: 14-10-2014
Publisher: The Royal Society
Date: 13-03-2019
Abstract: Behavioural lateralization is widespread. Yet, a fundamental question remains, how can lateralization be evolutionary stable when in iduals lateralized in one direction often significantly outnumber in iduals lateralized in the opposite direction? A recently developed game theory model predicts that fitness consequences which occur during intraspecific interactions may be driving population-level lateralization as an evolutionary stable strategy. This model predicts that: (i) minority-type in iduals exist because they are more likely to adopt unpredictable fighting behaviours during competitive interactions (e.g. fighting) and (ii) majority-type in iduals exist because there is a fitness advantage in having their biases synchronized with other conspecifics during interactions that require coordination (e.g. mating). We tested these predictions by investigating biases in giant Australian cuttlefish during fighting and mating interactions. During fighting, most male cuttlefish favoured the left eye and these males showed higher contest escalation but minority-type in iduals with a right-eye bias achieved higher fighting success. During mating interactions, most male cuttlefish favoured the left eye to inspect females. Furthermore, most male cuttlefish approached the female's right side during a mating attempt and these males achieved higher mating success. Our data support the hypothesis that population-level biases are an evolutionary consequence of the fitness advantages involved in intraspecific interactions.
Publisher: CSIRO Publishing
Date: 2005
DOI: 10.1071/MF04157
Abstract: The present study investigated the stock structure of snapper (Pagrus auratus) in South Australia, and the extent to which this is influenced by adult movement. Fish from the 9+ age class were s led from six different regions, encompassing km of coastline and different habitat types. The chemistry of transverse sections of otoliths was s led using laser ablation inductively coupled plasma-mass spectrometry, providing elemental profiles that were related to age for the first nine years of the fish’s lives. The age-related annual averages for both 88Sr and 138Ba differed significantly between regions. They were, however, similar for the first three years, then erged considerably between the ages of three to five years, and then remained consistently different through to the age of nine years. This suggests that all fish, regardless of where captured, originated from only one or two nursery areas, but dispersed throughout the different regions between the ages of three to five years, before becoming resident to their new regions of occupancy. Thus, this population of snapper represents a single, large, stock where the in iduals have a common origin, but through age-related emigration ultimately disperse and supplement the low abundance populations in regional State waters.
Publisher: Springer Science and Business Media LLC
Date: 27-07-2016
Publisher: Wiley
Date: 03-2012
DOI: 10.1111/J.1095-8649.2011.03202.X
Abstract: This study assessed the mortality of 157 snapper Pagrus auratus (9-29 cm, total length, L(T) ) after being conventionally angled and then released into cages (along with 48 controls) for 4 days off south-eastern Australia. Fatalities were restricted to 12 angled fish (7·6%) and mostly attributed to the ingestion of hooks and especially their subsequent removal, which caused substantial blood loss and immediate death. Hook ingestion was significantly biased towards smaller fish (<21 cm L(T)) and attributed to a lower chance of anglers initially detecting these in iduals on the line (allowing them to consume more of the baits). While mortalities might be reduced in future via (1) choosing terminal rigs that promote mouth hooking and (2) cutting the line on any-hook ingested fish, the results nevertheless validate releasing unwanted angled inshore juvenile P. auratus as a means for managing their exploitation.
Publisher: Elsevier BV
Date: 2021
Publisher: Oxford University Press (OUP)
Date: 24-11-2022
Abstract: Cuttlefish are an important global fisheries resource, and their demand is placing increasing pressure on populations in many areas, necessitating conservation measures. We reviewed evidence from case studies spanning Europe, Africa, Asia, and Australia encompassing erse intervention methods (fisheries closures, protected areas, habitat restoration, fishing-gear modifications, promoting egg survival, and restocking), and we also discuss the effects of pollution on cuttlefish. We conclude: (1) spatio-temporal closures need to encompass substantial portions of a species’ range and protect at least one major part of their life cycle (2) fishing-gear modifications have the potential to reduce unwanted cuttlefish capture, but more comprehensive trials are needed (3) egg survival can be improved by erting and salvaging from traps (4) existing lab rearing and restocking may not produce financially viable results and (5) fisheries management policies should be regularly reviewed in light of rapid changes in cuttlefish stock status. Further, citizen science can provide data to reduce uncertainty in empirical assessments. The information synthesized in this review will guide managers and stakeholders to implement regulations and conservation initiatives that increase the productivity and sustainability of fisheries interacting with cuttlefish, and highlights gaps in knowledge that need to be addressed.
Publisher: Wiley
Date: 21-10-2021
DOI: 10.1002/AQC.3733
Abstract: Marine aquarium organisms represent some of the highest value products that can be harvested from coral reefs. Collection is extremely selective, and sea anemones are often targeted, leading to reduced densities and localized extinctions in some locations. Currently, there is a lack of information about species’ popularity and survival in captivity, and consumer attitudes towards sustainability. This study surveyed aquarists and businesses ( n = 445) from 39 countries between February and October 2018 to help fill these knowledge gaps. Respondent groups indicated similar preferences. The three most desired species were Entacmaea quadricolor, Stichodactyla tapetum and Heteractis magnifica . Size preferences for anemones were typically smaller (tentacle crown diameter of 100–200 mm) than their maximum sizes. Survival time in captivity was generally 12 months or longer, and 20% lived more than 10 years. Respondents indicated that they would prefer to buy captive‐bred rather than wild‐harvested anemones (aquarists 95%, businesses 94%) and would pay more for the former (aquarists 79%, businesses 70%). While potential propagation methods have been established for E. quadricolor , other popular anemones within the marine aquarium trade may also be good candidates for captive breeding. Mariculture could provide alternative livelihoods, reduce collection pressure on wild populations and facilitate the recovery and conservation of depleted anemone populations, particularly in developing island nations from where the majority of anemones are currently sourced.
Publisher: Elsevier BV
Date: 12-2010
DOI: 10.1016/J.SCITOTENV.2010.08.062
Abstract: Understanding how sulfate-reducing microbes in freshwater systems respond to added salt, and therefore sulfate, is becoming increasingly important in inland systems where the threat from salinisation is increasing. To address this knowledge gap, we carried out mesocosm studies to determine how the sulfate-reducing microbial community in sediments from a freshwater wetland would respond to salinisation. The levels of inorganic mineral sulfides produced after 6months incubation were measured to determine whether they were in sufficient quantity to be harmful if re-oxidized. Comparative sequence analysis of the dissimilatory sulfite reductase (DSR) gene was used to compare the sulfate-reducing community structure in mesocosms without salt and those incubated with moderate levels of salt. The amount of total S, acid volatile sulfide or chromium-reducible sulfide produced in sediments with 0, 1 or 5gL(-1) added salt were not significantly different. Sediments subjected to 15gL(-1) salt contained significantly higher total S and acid volatile sulfide, and levels were above trigger values for potential harm if re-oxidation occurred. The overall community structure of the sulfate-reducing microbiota (SRM) was explained by the level of salt added to sediments. However, a group of sulfate reducers were identified that occurred in both the high salt and freshwater treatments. These results demonstrate that freshwater sediments contain sulfate reducers with erse abilities to respond to salt and can respond rapidly to increasing salinity, explaining the observation that harmful levels of acid volatile sulfides can form rapidly in sediments with no history of exposure to salt.
Publisher: Wiley
Date: 28-03-2017
DOI: 10.1111/JFB.13282
Abstract: The present study tested the hypothesis of no delayed sublethal effects of mild angling and release on the feeding, growth, somatic condition and gonadal development of golden perch Macquaria ambigua during gametogenesis. Subs les of adult M. ambigua (n = 17-21 of 207), originally captured from the wild and stocked into ten 0·1 ha earthen ponds, were angled and released during early and late gametogenesis. Wild s les that were concurrently collected throughout the experiment underwent rapid and synchronous gonadal development and many spawned. While no spawning occurred in the ponds, most M. ambigua underwent normal gonadal development to maturity, including the angled fish. Angled fish also fed, maintained condition and actually grew faster than non-angled captive controls. Although females that were angled during late gametogenesis more readily ingested and retained baited hooks, neither their subsequent condition nor gonadal development was significantly affected. The predominance of null results was attributed to the combined effects of the flexible reproductive strategy of M. ambigua, the benignness of mouth hooking and immediate release, and possible methodological issues arising from differential hooking success of more aggressive and resilient in iduals. The findings support earlier catch-and-release research, but contrast with reports of acute reproductive effects following capture and handling for aquaculture broodstock. This discrepancy highlights the need for research to specifically address welfare questions relevant to recreational fisheries across various species and angling scenarios.
Publisher: Springer Science and Business Media LLC
Date: 14-01-2010
Publisher: Oxford University Press (OUP)
Date: 23-11-2010
Abstract: Butcher, P. A., Broadhurst, M. K., Hall, K. C., Cullis, B. R., and Nicoll, R. G. 2010. Scale loss and mortality in angled-and-released eastern sea garfish (Hyporh hus australis). – ICES Journal of Marine Science, 67: 522–529. The eastern sea garfish (Hyporh hus australis) is an endemic Australian marine teleost that is angled in large numbers throughout its distribution. Most fish are retained, although some are released, mainly because of size-grading in response to bag limits. Owing to their fragility, there are concerns that few released fish survive. To investigate this assumption, 185 angled and 90 control eastern sea garfish were released in groups of five into holding cages, then monitored for up to 24 h. One control and 93 angled fish died, providing an adjusted angled mortality rate of 49.2%. All fish that ingested their hooks (n=7) subsequently died. Generalized linear mixed models for the remaining mouth-hooked garfish revealed that mortalities were mainly caused by scale loss (p .01) and air exposure (p .05). Further analyses revealed that scale loss most likely occurred when fish were held with dry bare hands (p .05), dropped (p .05) and exposed to air (p .01), or confined in 20-l buckets (p .05) for long periods. Air exposure was not significantly affected by any of the variables. Magnetic resonance imaging of 10 live and 5 dead angled-and-released fish revealed no significant differences in dermal damage, although the fatalities typically had greater abrasions than the survivors. The results demonstrate that the fate of eastern sea garfish can be improved significantly if they are released quickly, without physical contact. This protocol could have similar utility among other released species with deciduous scales.
Publisher: Wiley
Date: 09-03-2007
Publisher: Springer Science and Business Media LLC
Date: 07-04-2007
Publisher: Springer Science and Business Media LLC
Date: 17-02-2007
Publisher: Wiley
Date: 28-09-2011
DOI: 10.1111/J.1095-8649.2011.03096.X
Abstract: The effects of barotrauma on the short-term mortality and physical condition of Australian bass Macquaria novemaculeata were investigated after being: (1) conventionally angled and released during two tournaments in deep impoundments and (2) released untreated or subjected to venting or recompression during a manipulative experiment. All fish were released into two 20 m deep bathy-cages and monitored for 3 days. Of 238 M. novemaculeata angled during the tournaments, 43 (18·1%) had clinical signs of barotrauma or were vented and five of these later died (11·6% mortality). Catch histories varied significantly between both barotrauma and non-barotrauma fish and tournaments, but only hook ingestion significantly influenced mortality (P < 0·05). During the manipulative experiment, venting significantly influenced mortality (13·3%) compared to no treatment or recompression (no deaths). Magnetic resonance images and dissections of barotrauma fish indicated large variation among clinical signs. On the basis of these results, wherever possible M. novemaculeata suffering barotrauma should be immediately released with no treatment. Fish that are unable to resubmerge should be recompressed, while those held in live wells and released in shallow water should be vented.
Publisher: Wiley
Date: 09-1995
Publisher: Elsevier BV
Date: 09-2012
Publisher: Oxford University Press (OUP)
Date: 17-12-2010
Abstract: Butcher, P. A., Broadhurst, M. K., Hall, K. C., and Cooke, S. J. 2011. Post-release survival and physiology of angled luderick (Girella tricuspidata) after confinement in keeper nets in an Australian estuary. – ICES Journal of Marine Science, 68: . The study was initiated in response to concerns about the post-release welfare of angled luderick (Girella tricuspidata) after protracted confinement in keeper nets. In all, 111 fish were angled and confined for 2–250 min before being released into holding cages (with 87 controls) and monitored for 4 d. Blood was taken from fish angled and brought on board immediately (n = 11), angled and held in keeper nets (n = 25), and angled and held in monitoring cages for 4 d (n = 12). Blood was also taken from controls held in monitoring cages for 4 d (n = 12). No controls and only one angled fish died. Compared with immediately s led angled fish, those confined in keeper nets had significantly elevated cortisol, glucose, lactate, chloride, sodium, and aspartate aminotransferase. Most of the variables returned to pre-stress levels in caged fish after 4 d. Despite this recovery, the short-term stress associated with capture and keeper-net confinement has welfare implications and justifies avoiding such a practice and/or reducing the personal daily angling quota of the species.
Publisher: Wiley
Date: 30-06-2015
Publisher: Springer Science and Business Media LLC
Date: 03-2002
Publisher: Wiley
Date: 18-05-2009
Publisher: Springer Science and Business Media LLC
Date: 11-2003
Publisher: Wiley
Date: 20-10-2011
Publisher: Inter-Research Science Center
Date: 11-06-2018
DOI: 10.3354/MEPS12606
Publisher: Wiley
Date: 02-05-2013
DOI: 10.1111/JFD.12103
Abstract: This study assessed the effects of different retrieval depths (2, 10 or 20 m), surface intervals (none or 15 min) and release methods (untreated, vented or recompressed) on the incidence of external and internal clinical signs of barotrauma (ECSB and ICSB) and post-release mortality in golden perch, Macquaria ambigua (Richardson). Fish were assessed for ECSB before and after surface intervals and either monitored for mortality over 3 days in two deep cages or killed for internal examination. When all fish were left untreated, short-term mortality increased with retrieval depth from 0% and 4.2% among 2 and 10-m fish, respectively, to 19.2% among 20-m fish while surface interval only affected the incidence of two ECSB (excess buoyancy and a prolapsed cloaca). Mortality was also greater among 20-m fish that were subjected to a 15-min surface interval and left untreated (22.2%) or vented (22.2%) than those that were recompressed (5.6%). Of the ECSB, only exophthalmia was associated with increased mortality, with half of the affected fish dying. However, many fish retrieved from 10 and 20 m also sustained numerous ICSB, including compressed gonads or vital organs and ruptured or collapsed, haemorrhaging swimbladders that remained deflated for up to 3 days after release.
Publisher: University of Chicago Press
Date: 04-2007
DOI: 10.1086/512106
Abstract: Cephalopods are well known for their erse, quick-changing camouflage in a wide range of shallow habitats worldwide. However, there is no documentation that cephalopods use their erse camouflage repertoire at night. We used a remotely operated vehicle equipped with a video camera and a red light to conduct 16 transects on the communal spawning grounds of the giant Australian cuttlefish Sepia apama situated on a temperate rock reef in southern Australia. Cuttlefish ceased sexual signaling and reproductive behavior at dusk and then settled to the bottom and quickly adapted their body patterns to produce camouflage that was tailored to different backgrounds. During the day, only 3% of cuttlefish were camouflaged on the spawning ground, but at night 86% (71 of 83 cuttlefish) were camouflaged in variations of three body pattern types: uniform (n=5), mottled (n=33), or disruptive (n=34) coloration. The implication is that nocturnal visual predators provide the selective pressure for rapid, changeable camouflage patterning tuned to different visual backgrounds at night.
Publisher: Elsevier BV
Date: 10-2006
DOI: 10.1016/J.SCITOTENV.2006.07.019
Abstract: This project examined the extent of sulfidic sediments in freshwater wetlands of the Murray-Darling Basin, Australia. We s led 81 wetlands throughout the basin with methods previously developed for the analysis of coastal acid sulfate soils. Sulfidic sediments are generally regarded as a coastal phenomenon. We tested the hypothesis that elevated concentrations of mineral sulfides may also accumulate in sediments of inland wetlands. Of the 81 wetlands s led, 17 (21%) contained reduced sulfur in sediments at concentrations above suggested trigger values. Most of the affected wetlands were adjacent to the Murray River, with only several associated with other major river catchments. Reduced sulfur in the sediments was positively correlated with sulfate concentrations in the overlying water column. This represents a concern for wetland managers because of the increasing desire to return wetlands to a more natural wetting and drying cycle to improve wetland health. However, during drying, sulfidic sediments oxidise and produce acid, which may exceed the buffering capacity of the system and ultimately harm aquatic life. Therefore, if sulfidic sediments are present, a drying phase should only be reinstated after careful consideration of the potential acidification risks. This study verified that sulfidic sediments can occur in freshwater wetlands in concentrations that could pose an ecological risk if mismanaged.
Publisher: Wiley
Date: 12-2009
DOI: 10.1111/J.1095-8649.2009.02474.X
Abstract: This study assessed the protracted effects of two angling treatments (mild and harsh) on the post-release mortality, gonadal development and somatic condition of Australian bass Macquaria novemaculeata in a pond-based experiment. Angled fish were destructively s led (along with controls) three times: immediately before, and 1 or 4 weeks after release into cages. Compared with the other groups, harshly angled fish had similar, low immediate and short-term mortalities (< or =5%), but significant delayed mortality (25%) and fed only minimally. None of these fish ejected ingested hooks. Forty-six per cent of captive fish (across all groups) and 20% of wild fish had non-ripening gonads (stage I) prior to, or during, the experiment. In females with ripening ovaries (stages II or III), neither angling treatment significantly reduced standardized gonadal mass. The mean per cent of atretic oocytes increased among females in all groups, but was significantly greater in those that were harshly angled. The results demonstrated that the gonadal development of M. novemaculeata could be suppressed or impaired (by angling, handling and confinement), and that further research is warranted. In particular, the timing and severity of angling in relation to the stage of gonadal development could have important implications for the introduction of temporal restrictions to angling.
Publisher: Elsevier BV
Date: 06-2004
Publisher: CSIRO Publishing
Date: 2015
DOI: 10.1071/MF14081
Abstract: Little is known about the population trajectory and dynamics of many marine invertebrates because of a lack of robust observational data. The giant Australian cuttlefish (Sepia apama) is IUCN-listed as Near Threatened because the largest known breeding aggregation of this species in northern Spencer Gulf, South Australia, has declined markedly since the turn of the century. We used by-catch records from long-term trawl surveys to derive abundance data for S. apama and commercial cuttlefish harvest data as a measure of exploitation. Using Bayesian hierarchical models to account for zero-inflation and spatial dependence in these abundance counts, we demonstrated a high probability of broad-scale declines in the density of S. apama, particularly surrounding the primary aggregation site, which supports the recent closure of the entire S. apama fishery in northern Spencer Gulf. Historical harvest data were positively correlated with S. apama density estimated from the trawl surveys, suggesting that the commercial cuttlefish catch tracks the species abundance. Our results also indicated the possibility that the known S. apama breeding grounds might be supplemented by in iduals that were spawned elsewhere in northern Spencer Gulf.
Location: Australia
No related grants have been discovered for Karina Hall.