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Examining the effects of authentic C&R on the reproductive potential of Northern pike

Flink, Henrik and Nordahl, Oscar and Hall, Marcus and Rarysson, Anton and Bergstrom, Kristofer and Larsson, Per and Petersson, Erik and Merila, Juha and Tibblin, Petter (2021). Examining the effects of authentic C&R on the reproductive potential of Northern pike. Fisheries Research. 243 , 106068
[Research article]

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Abstract

The practice within recreational fisheries to release captured fish back to the wild, known as catch-and-release (C&R), is an increasingly important strategy to protect fish stocks from overexploitation. However, C&R is a stressor and since animal reproduction is particularly sensitive to stress there is reason to suspect that such a practice induces sublethal fitness consequences. Here, we investigated whether and how C&R fishing influenced the reproductive potential in an anadromous population of Northern pike (Esox lucius). First, female pike were exposed to authentic C&R using rod-and-reel fishing in a coastal foraging habitat prior to the spawning period. Next, we observed the migration to the freshwater spawning habitat and compared both the timing of arrival and maturity stage between C&R-treated and control individuals. Finally, to evaluate effects on the quality and viability of eggs we stripped captured control and recaptured C&R-treated females, measured egg dry mass to assess nutrient content, conducted artificial fertilisations and incubated eggs in a controlled laboratory experiment. We found no evidence of C&R causing alterations in either arrival time, maturity stage, or the quality and viability of fertilised eggs. In combination, our results suggest that long-term effects of C&R-induced stress on key reproductive traits of pike, if any, are minor.

Authors/Creators:Flink, Henrik and Nordahl, Oscar and Hall, Marcus and Rarysson, Anton and Bergstrom, Kristofer and Larsson, Per and Petersson, Erik and Merila, Juha and Tibblin, Petter
Title:Examining the effects of authentic C&R on the reproductive potential of Northern pike
Series Name/Journal:Fisheries Research
Year of publishing :2021
Volume:243
Article number:106068
Number of Pages:9
Publisher:ELSEVIER
ISSN:0165-7836
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:Angling, Migration, Recreational fishing, Reproduction, Stress
URN:NBN:urn:nbn:se:slu:epsilon-p-113477
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113477
Additional ID:
Type of IDID
DOI10.1016/j.fishres.2021.106068
Web of Science (WoS)000690429400010
ID Code:25286
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:09 Sep 2021 11:25
Metadata Last Modified:09 Sep 2021 11:31

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