Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea)
Abstract When caught in a trawl, some individuals interacting with the fishing gear may escape, but such interactions may lead to physiological trauma that causes direct delayed mortality and/or increased vulnerability to predation. Understanding fishery-induced stress levels and the recovery period...
Published in: | Journal of Crustacean Biology |
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2021
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Online Access: | http://dx.doi.org/10.1093/jcbiol/ruab013 http://academic.oup.com/jcb/article-pdf/41/2/ruab013/37774505/ruab013.pdf |
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croxfordunivpr:10.1093/jcbiol/ruab013 2023-08-20T04:02:33+02:00 Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) Krag, Ludvig A Krafft, Bjørn A Herrmann, Bent Skov, Peter V Havforskningsinstituttet Norwegian Research Council 2021 http://dx.doi.org/10.1093/jcbiol/ruab013 http://academic.oup.com/jcb/article-pdf/41/2/ruab013/37774505/ruab013.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of Crustacean Biology volume 41, issue 2 ISSN 0278-0372 1937-240X Aquatic Science journal-article 2021 croxfordunivpr https://doi.org/10.1093/jcbiol/ruab013 2023-07-28T11:02:06Z Abstract When caught in a trawl, some individuals interacting with the fishing gear may escape, but such interactions may lead to physiological trauma that causes direct delayed mortality and/or increased vulnerability to predation. Understanding fishery-induced stress levels and the recovery period of escapees is therefore crucial for predicting total fishing-induced mortality. Hemolymph lactate concentration is commonly used as an index of physiological stress in many crustacean species, and the clearing time of lactate back to normal levels indicates the ability to recover from stress. We measured the hemolymph lactate concentration in three groups of Antarctic krill (Euphausia superbaDana, 1850): Group 1, trawl escapees collected during fishing; Group 2, specimens subjected to simulated mesh penetration; and Group 3, an onboard acclimated control group. Individuals that had escaped the trawl during fishing had the highest concentrations of hemolymph lactate (mean > 6 mmol–l). Exposure to mesh penetration was in itself not stressful, as hemolymph lactate concentrations did not differ significantly between Group 2 and the control Group (mean 0.8 mmol–lversus 0.7 mmol–l, respectively). Additional stress factors during the capture and handling process likely added to the elevated lactate levels observed in Group 1. For the trawl escapees, the lactate clearance time during stress recovery was modeled as a function of exponential decay. Hemolymph lactate levels did not differ significantly among the three groups after 200 min, which suggested that Antarctic krill recovered from fishery-induced stress within this time period. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Oxford University Press (via Crossref) Antarctic The Antarctic Journal of Crustacean Biology 41 2 |
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Oxford University Press (via Crossref) |
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croxfordunivpr |
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English |
topic |
Aquatic Science |
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Aquatic Science Krag, Ludvig A Krafft, Bjørn A Herrmann, Bent Skov, Peter V Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
topic_facet |
Aquatic Science |
description |
Abstract When caught in a trawl, some individuals interacting with the fishing gear may escape, but such interactions may lead to physiological trauma that causes direct delayed mortality and/or increased vulnerability to predation. Understanding fishery-induced stress levels and the recovery period of escapees is therefore crucial for predicting total fishing-induced mortality. Hemolymph lactate concentration is commonly used as an index of physiological stress in many crustacean species, and the clearing time of lactate back to normal levels indicates the ability to recover from stress. We measured the hemolymph lactate concentration in three groups of Antarctic krill (Euphausia superbaDana, 1850): Group 1, trawl escapees collected during fishing; Group 2, specimens subjected to simulated mesh penetration; and Group 3, an onboard acclimated control group. Individuals that had escaped the trawl during fishing had the highest concentrations of hemolymph lactate (mean > 6 mmol–l). Exposure to mesh penetration was in itself not stressful, as hemolymph lactate concentrations did not differ significantly between Group 2 and the control Group (mean 0.8 mmol–lversus 0.7 mmol–l, respectively). Additional stress factors during the capture and handling process likely added to the elevated lactate levels observed in Group 1. For the trawl escapees, the lactate clearance time during stress recovery was modeled as a function of exponential decay. Hemolymph lactate levels did not differ significantly among the three groups after 200 min, which suggested that Antarctic krill recovered from fishery-induced stress within this time period. |
author2 |
Havforskningsinstituttet Norwegian Research Council |
format |
Article in Journal/Newspaper |
author |
Krag, Ludvig A Krafft, Bjørn A Herrmann, Bent Skov, Peter V |
author_facet |
Krag, Ludvig A Krafft, Bjørn A Herrmann, Bent Skov, Peter V |
author_sort |
Krag, Ludvig A |
title |
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_short |
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_full |
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_fullStr |
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_full_unstemmed |
Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea) |
title_sort |
physiological stress and recovery kinetics in trawl escapees of the antarctic krill euphausia superba dana, 1850 (euphausiacea) |
publisher |
Oxford University Press (OUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1093/jcbiol/ruab013 http://academic.oup.com/jcb/article-pdf/41/2/ruab013/37774505/ruab013.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba |
op_source |
Journal of Crustacean Biology volume 41, issue 2 ISSN 0278-0372 1937-240X |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/jcbiol/ruab013 |
container_title |
Journal of Crustacean Biology |
container_volume |
41 |
container_issue |
2 |
_version_ |
1774713070214447104 |