NDLI: Group feeding behavior of brown trout is a correlated response to selection for growth shaped by the environment

Content Provider	Springer Nature Link
Author	Boujard, Thierry Ramezi, Julien Vandeputte, Marc Labbé, Laurent Mambrini, Muriel
Copyright Year	2007
Abstract	Group feeding pattern is a response correlated to selection for growth in brown trout. Previous results suggest that the feeding pattern of two lines (NL and SY), selected with the same process at two different fishfarms, differ. This study addresses the following questions: (i) are the patterns differentially fixed by the selection process and if yes (ii) is this explained by the different genetic background of the lines? In a first experiment, we tested if the group feeding behavior can be inherited. We produced and reared under the same experimental conditions selected hybrids (NLS × SYS) and pure SY selected line (SYS). We compared their behavior on self-feeders when reared single or mixed (groups of 500 fish; mean initial BW = 6 g, 90-day period). Growth rates were comparable among the groups. In the lines reared single, NLS × SYS exhibited greater morning feeding activity than SYS. Feeding activity of SYS was higher later in the day. The inter-day variation of the morning peak was less variable for the hybrid than for the SYS line. In the mixed group, the pattern was intermediate between that of the hybrid and the pure line. In a second experiment we compared the feeding pattern of control hybrids (NLC × SYC) to pure control lines (SYC and NLC) reared single or mixed (groups of 500 fish; mean initial BW = 12 g, 92-day period). Feeding activity patterns were similar among the control groups. These results show that group feeding pattern is a heritable trait that can be indirectly selected with growth, which shape is less influenced by the growth performance and the genetic background than by the environmental conditions applied during the selection process.
Starting Page	525
Ending Page	534
Page Count	10
File Format	PDF
ISSN	00018244
Journal	Behavior Genetics
Volume Number	37
Issue Number	3
e-ISSN	15733297
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2007-03-09
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Feeding behavior Feeding pattern Growth Correlated response Environment interaction Fish Evolutionary Biology Neurosciences Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics Genetics (clinical)

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