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Zooplanktivore fish body growth responses to browning-induced light limitation vary over ontogeny, but not with fish density

Van Dorst, Renee and Gårdmark, Anna and Svanback, Richard and Huss, Magnus (2021). Zooplanktivore fish body growth responses to browning-induced light limitation vary over ontogeny, but not with fish density. Ecology of Freshwater Fish. 31 , 17-28
[Research article]

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Abstract

Ongoing climate change is leading to browning of many lakes and coastal areas, which can impair fish body growth and biomass production. However, whether and how effects of light limitation caused by browning on fish body growth vary over early ontogeny is unknown. In this study, we set up a mesocosm experiment to test whether roach (Rutilus rutilus) body growth responses to browning depend on body size, and if findings are robust over roach densities. We also studied a potential mechanism for size-specific responses by conducting an aquaria experiment to test if size-specific prey selectivity in roach changes with browning. We found that roach body growth responses to browning-induced light limitation vary over ontogeny (independent of roach density), negatively affecting body growth of young-of-the-year (YOY) but not of 1-year-old individuals. We also show that this difference in growth response is likely a consequence of browning-induced alterations in zooplankton community composition and variation in prey selectivity between YOY and 1-year-old fish. This suggests that we should account for the diverse effects of browning over fish ontogeny, mediated via altered prey composition and ontogenetic changes in prey preference, when assessing overall impacts of browning on aquatic ecosystems.

Authors/Creators:Van Dorst, Renee and Gårdmark, Anna and Svanback, Richard and Huss, Magnus
Title:Zooplanktivore fish body growth responses to browning-induced light limitation vary over ontogeny, but not with fish density
Series Name/Journal:Ecology of Freshwater Fish
Year of publishing :2021
Volume:31
Page range:17-28
Number of Pages:12
Publisher:WILEY
ISSN:0906-6691
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 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:body size, browning, climate change, density, prey selectivity, roach
URN:NBN:urn:nbn:se:slu:epsilon-p-111579
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-111579
Additional ID:
Type of IDID
DOI10.1111/eff.12605
Web of Science (WoS)000634117600001
ID Code:26275
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:06 Dec 2021 10:25
Metadata Last Modified:06 Dec 2021 10:31

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