Mortality of key fish species released by recreational anglers in an Australian estuary

Broadhurst, Matt K.; Gray, Charles A.; Reid, Dennis; Wooden, Michael E.L.; Young, Damian J.; Haddy, James; Damiano, Cristiana

doi:10.1016/j.jembe.2005.02.001

Cited by 71 publications

(131 citation statements)

References 17 publications

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“…For A. australis, the percentages dying were comparable to those recorded for individuals released from capture by hook and line (e.g. between 8 and 28%; Broadhurst et al 2005), while R. sarba incurred a similar range of fatalities as another local sparid (snapper Pagrus auratus) discarded during trawling (between 30 and 100%, Wassenberg & Hill 1993, Sumpton & Jackson 2005.…”

Section: Discussionsupporting

confidence: 51%

“…At least 3 d prior to the start of each experiment, appropriate numbers and species of control fish were collected from the estuaries using cast nets, hook and line, beach seines and short deployments (<15 min) of trawls and boat-based seines rigged with fine-meshed, knotless codends (see Broadhurst et al 2004bBroadhurst et al , 2005 for details) and placed into the holding tanks. All control fish were handled, transported, fed and monitored for mortalities following the procedures outlined by Broadhurst et al (1999).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Damage and partitioned mortality of teleosts discarded from two Australian penaeid fishing gears

Uhlmann

Broadhurst²

2007

Dis. Aquat. Org.

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Section: Discussionsupporting

confidence: 51%

Section: Methodsmentioning

confidence: 99%

Damage and partitioned mortality of teleosts discarded from two Australian penaeid fishing gears

Uhlmann

Broadhurst²

2007

Dis. Aquat. Org.

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“…With a total catch of 13 million ind. yr -1 (Henry & Lyle 2003), breams (Sparidae) are among the most highly sought species, and especially yellowfin bream Acanthopagrus australis, which is targeted throughout its distribution in estuaries and near-shore habitats between southern Queensland and Victoria (West & Gordon 1994, Broadhurst et al 2005.…”

Section: Introductionmentioning

confidence: 99%

“…Concerns over the potential for large unaccounted recreational fishing mortalities of yellowfin bream have resulted in preliminary assessments of their post-release fate, the results of which have been promising (Broadhurst et al 1999, Butcher et al 2007. For example, during a recent catch-and-release event involving conventional angling practices, Broadhurst et al (2005) observed overall short-term (< 5 d) mortalities of between 8 and 28%.…”

Section: Introductionmentioning

confidence: 99%

Ingestion and ejection of hooks: effects on long-term health and mortality of angler-caught yellowfin bream Acanthopagrus australis

Broadhurst¹,

Butcher²,

Brand³

et al. 2007

Dis. Aquat. Org.

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Ninety juvenile yellowfin bream Acanthopagrus australis were angled from holding tanks, allowed to ingest nickel-plated, carbon-steel J-hooks and released (with their lines cut) into individual experimental tanks during 2 experiments in order to assess their (1) long-term (up to 105 d) health, mortality and rate of hook ejection and (2) short-and medium-term (< 42 d) temporal changes in health during hook ingestion. Equal numbers of control fish were scooped from holding tanks and similarly monitored in experimental tanks. Of 20 hook-ingested fish released during Expt 1, 3 died within 8 d, providing a non-significant mortality of 15%. Between Day 6 and Day 56 post-release, 13 of the surviving individuals ejected their hooks, which were typically oxidized to about 94% of their original weight and often broken into 2 pieces. At Day 105, there were no significant differences between the 20 control and 17 hook-ingested/-ejected fish in terms of their ability to digest and assimilate food (measured as changes in apparent digestibility coefficients), stress (measured as concentrations of plasma cortisol and glucose) or of morphological parameters that included weight (Wt) and maximum height (MH), maximum width (MW) and maximum girth (MG). During Expt 2, 3 individuals that still contained ingested hooks and 3 controls were sampled on each of 9 occasions between Day 3 and Day 42 post-release. All fish were sampled for blood cortisol and glucose and were then euthanized before being weighed and measured for total length (TL), MH, MW and MG. Hook-ingested individuals were also X-rayed to determine the position and orientation of hooks. There were no significant differences in plasma glucose between hook-ingested and control fish. Irrespective of the treatment of fish, concentrations of cortisol were elevated on some sampling occasions, indicating variable, acute stress. The MH and MG of fish were not significantly different between groups. Significant differences were detected for MG and Wt, with hook-ingested fish having weights similar to those of the control fish but a relatively greater MW (owing to stomach distension from ingested hooks) until 2 wk post-release, after which both morphological parameters generally declined. There was no significant temporal progression of hooks in the stomach of treatment fish; however, some hooks reorientated to positions that may have precluded passage along the digestive tract. We conclude that, for the J-hooks examined, cutting the line is an appropriate strategy that results in the greater majority of released hook-ingested yellowfin bream surviving with minimal negative long-term effects. KEY WORDS: Acanthopagrus australis · Catch-and-release · Hook mortality · Hook ingestionResale or republication not permitted without written consent of the publisher

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“…Survival was lower in both throat-hooked and stomach-hooked fish, with no stomach-hooked fish surviving capture. Hook location has been found to be a significant factor affecting the post-release survival of several species in Australia including G. hebraicum (St. John and Syers, 2005), mulloway Argyrosomus japonicus (Butcher et al, 2007) and yellowfin bream Acanthopagrus australis (Broadhurst et al, 2005b). As such, in order to maximise the post-release survival of line-caught G. scapulare, it is prudent to highlight methods that reduce the incidence of deep-hooking during capture.…”

Section: Discussionmentioning

confidence: 99%

Short-term survival of discarded pearl perch (Glaucosoma scapulare Ramsay, 1881) caught by hook-and-line in Queensland, Australia

Campbell¹,

McLennan²,

Sumpton³

2014

Fisheries Research

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a b s t r a c tPost-release survival of line-caught pearl perch (Glaucosoma scapulare) was assessed via field experiments where fish were angled using methods similar to those used by commercial, recreational and charter fishers. One hundred and eighty-three individuals were caught during four experiments, of which >91% survived up to three days post-capture. Hook location was found to be the best predictor of survival, with the survival of throat-or stomach-hooked pearl perch significantly (P < 0.05) lower than those hooked in either the mouth or lip. Post-release survival was similar for both legal (≥35 cm) and sub-legal (<35 cm) pearl perch, while those individuals showing no signs of barotrauma were more likely to survive in the short term. Examination of the swim bladders in the laboratory, combined with observations in the field, revealed that swim bladders rupture during ascent from depth allowing swim bladder gases to escape into the gut cavity. As angled fish approach the surface, the alimentary tract ruptures near the anus allowing swim bladder gases to escape the gut cavity. As a result, very few pearl perch exhibit barotrauma symptoms and no barotrauma mitigation strategies were recommended. The results of this study show that pearl perch are relatively resilient to catch-and-release suggesting that post-release mortality would not contribute significantly to total fishing mortality. We recommend the use of circle hooks, fished actively on tight lines, combined with minimal handling in order to maximise the post-release survival of pearl perch.Crown

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Mortality of key fish species released by recreational anglers in an Australian estuary

Cited by 71 publications

References 17 publications

Damage and partitioned mortality of teleosts discarded from two Australian penaeid fishing gears

Damage and partitioned mortality of teleosts discarded from two Australian penaeid fishing gears

Ingestion and ejection of hooks: effects on long-term health and mortality of angler-caught yellowfin bream Acanthopagrus australis

Short-term survival of discarded pearl perch (Glaucosoma scapulare Ramsay, 1881) caught by hook-and-line in Queensland, Australia

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