Assessment of Genetic Variability of Fish Personality Traits using Rainbow Trout Isogenic Lines

Type Article
Date 2014-07
Language English
Author(s) Millot Sandie1, Pean Samuel1, Labbe Laurent2, Kerneis Thierry2, Quillet Edwige3, Dupont-Nivet Mathilde3, Begout Marie-LaureORCID1
Affiliation(s) 1 : IFREMER, Lab Ressources Halieut, F-17137 Lhoumeau, France.
2 : INRA, PEIMA Pisciculture Expt INRA Monts dArree UE0937, F-29450 Le Drennec, Sizun, France.
3 : INRA, UMR 1313, F-78350 Jouy En Josas, France.
Source Behavior Genetics (0001-8244) (Springer), 2014-07 , Vol. 44 , N. 4 , P. 383-393
DOI 10.1007/s10519-014-9652-z
WOS© Times Cited 17
Keyword(s) Personality, Isogenic lines, Genetic variability, Risk taking, Spatial exploration, Oncorhynchus mykiss
Abstract The study of inter-individual variability of personality in fish is a growing field of interest but the genetic basis of this complex trait is still poorly investigated due to the difficulty in controlling fish genetic origin and life history. When available, isogenic lines that allow performing independent tests on different individuals having identical genotype constitute a very relevant experimental material to disentangle the genetic and environmental components of behavioural individuality. We took advantage of heterozygous isogenic lines to investigate the personality in rainbow trout through the analysis of their reactions to different experimental situations. To this end, seven to ten rainbow trout isogenic lines were screened for their spatial exploratory behaviour, their flight response toward a stressor and their risk taking behaviour. Results showed that some lines seemed less sensitive to new events or environmental changes and could be defined as low responsive, while others were very sensitive and defined as high responsive. The use of isogenic lines highlighted the importance of genetic factors, in combination with life history, in the expression of personality in domesticated fish.
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