Post-capture survival of Atlantic wolffish (Anarhichas lupus) captured by bottom otter trawl: can live release programs contribute to the recovery of species at risk?
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Published source details
Grant S.M. & Hiscock W. (2014) Post-capture survival of Atlantic wolffish (Anarhichas lupus) captured by bottom otter trawl: can live release programs contribute to the recovery of species at risk?. Fisheries Research, 151, 169-176.
Published source details Grant S.M. & Hiscock W. (2014) Post-capture survival of Atlantic wolffish (Anarhichas lupus) captured by bottom otter trawl: can live release programs contribute to the recovery of species at risk?. Fisheries Research, 151, 169-176.
Actions
This study is summarised as evidence for the following.
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Release protected or species of concern alive after capture Action Link |
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Release protected or species of concern alive after capture
A replicated study in 2004 in bottom fishing grounds in the Atlantic Ocean off Canada (Grant & Hiscock 2014) found that Atlantic wolffish Anarhichas lupus (protected species) caught in the yellowtail flounder Limanda ferruginea trawl fishery typically survived for five days after capture and release. Overall post-capture survival of 41 wolffish (either kept in holding tanks for 48 h or held in tanks for 10 h before being placed in sea cages on the seabed for 2 d) ranged from 0–100%. However, survival varied with duration of air exposure after capture, with most individuals exposed to air for periods <2 h surviving (<30 min: 100%, 30 min–1 h: 88%, 1 h–1.5 h: 100%, 1.5–2 h: 90%), while none of the 4 fish exposed for >2 h survived. In autumn 2004, post-capture survival of wolffish captured in yellowtail flounder trawl net deployments was assessed. A total of 23 wolffish were held in temporary holding tanks and survival assesses up to 48 h, and 18 wolffish were held in tanks for 10 h before being moved to holding cages deployed on the seafloor where survival was monitored for up to 2 d.
(Summarised by: Leo Clarke)
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