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Facing the river gauntlet: understanding the effects of fisheries capture and water temperature on the physiology of coho salmon

Raby, Graham D., Clark, Timothy D., Farrell, Anthony P., Patterson, David A., Bett, Nolan N., Wilson, Samantha M., Willmore, William G., Suski, Cory D., Hinch, Scott G. and Cooke, Steven J. 2015, Facing the river gauntlet: understanding the effects of fisheries capture and water temperature on the physiology of coho salmon, PLoS one, vol. 10, no. 4, pp. 1-20, doi: 10.1371/journal.pone.0124023.

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Title Facing the river gauntlet: understanding the effects of fisheries capture and water temperature on the physiology of coho salmon
Author(s) Raby, Graham D.
Clark, Timothy D.
Farrell, Anthony P.
Patterson, David A.
Bett, Nolan N.
Wilson, Samantha M.
Willmore, William G.
Suski, Cory D.
Hinch, Scott G.
Cooke, Steven J.
Journal name PLoS one
Volume number 10
Issue number 4
Article ID e0124023
Start page 1
End page 20
Total pages 20
Publisher PLoS
Place of publication San Francisco, Calif.
Publication date 2015
ISSN 1932-6203
Keyword(s) Animals
Conservation of Natural Resources
Electrocardiography
Female
Fisheries
Heart Rate
Lactic Acid
Male
Muscle, Skeletal
Oncorhynchus kisutch
Oxygen Consumption
Rivers
Stress, Physiological
Temperature
Time Factors
Summary An improved understanding of bycatch mortality can be achieved by complementing field studies with laboratory experiments that use physiological assessments. This study examined the effects of water temperature and the duration of net entanglement on physiological disturbance and recovery in coho salmon (Oncorhynchus kisutch) after release from a simulated beach seine capture. Heart rate was monitored using implanted electrocardiogram biologgers that allowed fish to swim freely before and after release. A subset of fish was recovered in respirometers to monitor metabolic recovery, and separate groups of fish were sacrificed at different times to assess blood and white muscle biochemistry. One hour after release, fish had elevated lactate in muscle and blood plasma, depleted tissue energy stores, and altered osmoregulatory status, particularly in warmer (15 vs. 10°C) and longer (15 vs. 2 min) capture treatments. A significant effect of entanglement duration on blood and muscle metabolites remained after 4 h. Oxygen consumption rate recovered to baseline within 7-10 h. However, recovery of heart rate to routine levels was longer and more variable, with most fish taking over 10 h, and 33% of fish failing to recover within 24 h. There were no significant treatment effects on either oxygen consumption or heart rate recovery. Our results indicate that fishers should minimize handling time for bycatch and maximize oxygen supply during crowding, especially when temperatures are elevated. Physiological data, such as those presented here, can be used to understand mechanisms that underlie bycatch impairment and mortality, and thus inform best practices that ensure the welfare and conservation of affected species.
Language eng
DOI 10.1371/journal.pone.0124023
Field of Research 070403 Fisheries Management
070401 Aquaculture
050202 Conservation and Biodiversity
MD Multidisciplinary
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30105071

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.