Predation risk alters life history strategies in an oceanic copepod

TitlePredation risk alters life history strategies in an oceanic copepod
AuthorsKvile KØ, Altin D, Thommesen L, Titelman J
TypeJournal Article
Journal NameEcology
CitationKvile KØ, Altin D, Thommesen L, Titelman J. Predation risk alters life history strategies in an oceanic copepod. Ecology. 2020 Oct 01; e03214.


The ubiquitous oceanic copepod Calanus finmarchicus is the major link between primary producers and important fish stocks in the North Atlantic Ocean and adjacent seas. Despite over a century of research on growth and development of this key species, the effect of predation risk on these processes remains elusive. We tested how food level and chemical cues from a fish predator influence growth and development of C. finmarchicus, using a predator naïve laboratory population. Copepods reached adult stage earlier both in response to high food and to predator cues in our experiment. High food also increased growth and lipid accumulation. In contrast, perceived predation risk triggered reduced size and lipid fullness, indicating a decoupling of growth and development rates. Our results demonstrate that chemical predator cues can influence life history strategies in C. finmarchicus, and suggest that present and future patterns in oceanic zooplankton size and population dynamics may also reflect differences in predation risk.

Additional details for this publication include:
Property NameValue
Journal CountryUnited States
Publication TypeJournal Article
Language Abbreng
CopyrightThis article is protected by copyright. All rights reserved.
Journal AbbreviationEcology
Publication Date2020 Oct 01
Publication ModelPrint-Electronic
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PMID: PMID:33001438