Article (Scientific journals)
Brown trout fry move inshore at night: a choice of water depth or velocity?
Bardonnet, A.; Poncin, Pascal; Roussel, J. M.
2006In Ecology of Freshwater Fish, 15 (3), p. 309-314
Peer Reviewed verified by ORBi
 

Files


Full Text
Art Bardonnet.pdf
Publisher postprint (558.28 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
habitat; Salmonidae; young-of-the-year; emergence; predation risk
Abstract :
[en] The instream positions of brown trout fry differ between daylight and darkness. According to field and laboratory observations, recently emerged 0+ brown trout use shallow and slow-flowing areas close to the bank at night and tend to move off-shore during daylight. In laboratory channels, we tested whether the use of habitats close to the river bank could be attributed to a choice of either water depth or velocity. In two complementary experiments, emerging brown trout alevins were given the choice of using shallow-slow or deep-swift habitats (experiment 1), and deep-slow or shallow-swift habitats (experiment 2). At night, a persistent preference for the shallow habitats was displayed, regardless of velocity. It was concluded that swim-up brown trout fry respond to shallowness rather than ambient low water velocity when selecting habitats close to the bank at night. The behavioural significance of this result and implications for river management are discussed.
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Bardonnet, A.
Poncin, Pascal ;  Université de Liège - ULiège > Biologie du comportement - Ethologie et psychologie animale
Roussel, J. M.
Language :
English
Title :
Brown trout fry move inshore at night: a choice of water depth or velocity?
Publication date :
September 2006
Journal title :
Ecology of Freshwater Fish
ISSN :
0906-6691
eISSN :
1600-0633
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
15
Issue :
3
Pages :
309-314
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 January 2010

Statistics


Number of views
75 (7 by ULiège)
Number of downloads
1 (0 by ULiège)

Scopus citations®
 
10
Scopus citations®
without self-citations
7
OpenCitations
 
10

Bibliography


Similar publications



Contact ORBi