Universität zu Köln

Effertz, Christoph and von Elert, Eric ORCID: 0000-0001-7758-716X (2014). Light intensity controls anti-predator defences in Daphnia: the suppression of life-history changes. Proc. R. Soc. B-Biol. Sci., 281 (1782). LONDON: ROYAL SOC. ISSN 1471-2954

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Abstract

A huge variety of organisms respond to the presence of predators with inducible defences, each of which is associated with costs. Many genotypes have the potential to respond with more than one defence, and it has been argued that it would be maladaptive to exhibit all possible responses at the same time. Here, we test how a well-known anti-fish defence in Daphnia, life-history changes (LHC), is controlled by light. We show that the kairomone-mediated reduction in size at first reproduction is inversely coupled to the light intensity. A similar effect was found for the kairomonemediated expression of candidate genes in Daphnia. We argue that the light intensity an individual is exposed to determines the degree of LHC, which allows for plastic adjustment to fluctuating environments and simultaneously minimizes the associated costs of multiple alternately deployable defences. It is hypothesized that this allows for a coupling of multiple defences, i.e. LHC and diel vertical migration.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Effertz, Christoph UNSPECIFIED UNSPECIFIED UNSPECIFIED von Elert, Eric UNSPECIFIED orcid.org/0000-0001-7758-716X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-438508
DOI:	10.1098/rspb.2013.3250
Journal or Publication Title:	Proc. R. Soc. B-Biol. Sci.
Volume:	281
Number:	1782
Date:	2014
Publisher:	ROYAL SOC
Place of Publication:	LONDON
ISSN:	1471-2954
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DIEL VERTICAL MIGRATION; DEPTH SELECTION BEHAVIOR; HEAT-SHOCK PROTEINS; BODY-SIZE; HYALINA; KAIROMONES; PREDATION; MAGNA; PLASTICITY; DYNAMICS Multiple languages Biology; Ecology; Evolutionary Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43850