Universität zu Köln

Heynen, M., Borcherding, J., Bunnefeld, N. and Magnhagen, C. (2016). Plasticity and consistency of behavioural responses to predation risk in laboratory environments. J. Zool., 300 (3). S. 228 - 236. HOBOKEN: WILEY-BLACKWELL. ISSN 1469-7998

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Abstract

The individual animal is currently a major focus of behavioural research and an increasing number of studies raise the question of how between-individual behavioural consistency and behavioural plasticity interact. Applying the reaction norm concept on groups, our study addresses both of these aspects in one framework and within an animal's natural social environment. Risk-taking behaviour in 1-year-old perch Perca fluviatilis was assayed in aquarium experiments before and after the fish were subjected to the presence or absence of a piscivorous predator for 3weeks. To analyse the inter-individual behavioural variation across the repeated measurements, we dissected the behavioural change across the predator treatment into individual constant and plastic components using hierarchical mixed-effects models. During the predator treatment, juvenile perch increased in boldness and decreased in vigilance, the magnitude of these behavioural changes was influenced by group composition. However, the behavioural changes were not influenced by the presence of a predator, indicating the difficulties in generating realistic long-term predation pressure in the laboratory. Individuals differed in the relative increase in boldness across the predator treatment and, thus, varied in the shape of their reaction norms. In accordance, the best linear unbiased predictors, extracted from the random effects of separate linear mixed-effects models for the data before and after the predator treatment were only weakly correlated. Hence, between-individual variation seems to change under laboratory conditions and therewith not necessarily represents the initially present natural' variation, giving important implications for the conduction and interpretation of behavioural experiments.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Heynen, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Borcherding, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bunnefeld, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Magnhagen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-257123
DOI:	10.1111/jzo.12375
Journal or Publication Title:	J. Zool.
Volume:	300
Number:	3
Page Range:	S. 228 - 236
Date:	2016
Publisher:	WILEY-BLACKWELL
Place of Publication:	HOBOKEN
ISSN:	1469-7998
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHENOTYPIC PLASTICITY; PERCA-FLUVIATILIS; FITNESS CONSEQUENCES; PUMPKINSEED SUNFISH; ANIMAL PERSONALITY; TAKING BEHAVIOR; BOLDNESS; FISH; EVOLUTIONARY; POPULATIONS Multiple languages Zoology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25712