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Growth variation of Atlantic salmon Salmo salar at sea affects their population-specific reproductive potential

Jacobson, Philip and Whitlock, Rebecca and Huss, Magnus and Leonardsson, Kjell and Östergren, Johan and Gårdmark, Anna (2021). Growth variation of Atlantic salmon Salmo salar at sea affects their population-specific reproductive potential. Marine Ecology Progress Series. 671 , 165-174
[Research article]

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Abstract

Understanding the processes shaping the dynamics of anadromous fish populations is essential for their management and conservation. Yet, little is known about how variation in performance at sea affects their population dynamics. Here we show that variation in body growth at sea contributes to explaining variation in the reproductive potential for 2 Atlantic salmon Salmo salar populations, but to a varying extent. To this end, we assembled data collected during 50 yr for 2 Baltic salmon populations of hatchery origin, including annually released smolts, survival at sea estimates, size-specific growth at sea, annual length distributions of returning adult females and their reproductive potential. The regression models fitted to explain the reproductive potential of our 2 study populations improved when growth at sea was included as an explanatory variable, in addition to smolt year class abundance and estimates of their survival at sea. This link between body growth at sea and population-level reproductive potential suggests that growth at sea can be important to consider when resolving variation in recovery and dynamics among salmon populations sharing the same sea.

Authors/Creators:Jacobson, Philip and Whitlock, Rebecca and Huss, Magnus and Leonardsson, Kjell and Östergren, Johan and Gårdmark, Anna
Title:Growth variation of Atlantic salmon Salmo salar at sea affects their population-specific reproductive potential
Series Name/Journal:Marine Ecology Progress Series
Year of publishing :2021
Volume:671
Page range:165-174
Number of Pages:10
Publisher:INTER-RESEARCH
ISSN:0171-8630
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:Anadromy, Fecundity, Population dynamics, Salmon, Size-specific body growth
URN:NBN:urn:nbn:se:slu:epsilon-p-113635
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113635
Additional ID:
Type of IDID
DOI10.3354/meps13734
Web of Science (WoS)000691313900010
ID Code:25475
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Department of Aquatic Resources
(S) > Dept. of Wildlife, Fish and Environmental Studies
Deposited By: SLUpub Connector
Deposited On:21 Sep 2021 10:25
Metadata Last Modified:21 Sep 2021 10:31

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