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Effects of kinship on growth and movements of brown trout in field enclosures

Greenberg, L A; Herrnäs, B; Brönmark, Christer LU ; Dahl, Jonas LU and Eklöv, A (2002) In Ecology of Freshwater Fish 11(4). p.251-259
Abstract
The effect of kinship on growth and use of space by individually PIT-tagged 1+ brown trout was studied for 11 weeks in eight stream enclosures. Each enclosure consisted of two sections, separated by a region containing PIT-detecting antennae, which enabled us to measure use of sections by all individuals. Two types of sibling groups were tested, a single sibling group, F1, consisting of four individuals that were reared together in hatchery tank 'a' (F1a) plus four additional siblings of the same family but raised in hatchery tank 'b' (F1b), and a mixed sibling group, consisting of four F1a individuals plus four siblings from a second family, F2. Based on kin theory and earlier laboratory studies, we expected that growth of the F1a... (More)
The effect of kinship on growth and use of space by individually PIT-tagged 1+ brown trout was studied for 11 weeks in eight stream enclosures. Each enclosure consisted of two sections, separated by a region containing PIT-detecting antennae, which enabled us to measure use of sections by all individuals. Two types of sibling groups were tested, a single sibling group, F1, consisting of four individuals that were reared together in hatchery tank 'a' (F1a) plus four additional siblings of the same family but raised in hatchery tank 'b' (F1b), and a mixed sibling group, consisting of four F1a individuals plus four siblings from a second family, F2. Based on kin theory and earlier laboratory studies, we expected that growth of the F1a individuals in the single sibling group to be greater than that of F1a individuals in the mixed family sibling group, but instead we found just the opposite. The variance of growth did not differ between treatments. Nor was there a difference in time F1a individuals spent together when they were in mixed versus single sibling groups. We did find that F1a individuals changed habitat more frequently than F2 individuals in the mixed sibling group but less frequently than F1b in the single sibling groups. Thus, our predictions based on kin theory for growth and behavior of brown trout were not supported by our data, and we suggest that the role of kin recognition for the ecology of salmonids deserves further attention. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ecology of Freshwater Fish
volume
11
issue
4
pages
251 - 259
publisher
Wiley-Blackwell
external identifiers
  • wos:000179194900005
  • scopus:0036892483
ISSN
0906-6691
DOI
10.1034/j.1600-0633.2002.00018.x
language
English
LU publication?
yes
id
45c1ed2e-152c-432c-85f9-717a4159bbfc (old id 149876)
date added to LUP
2007-06-28 13:31:43
date last changed
2017-01-01 06:56:41
@article{45c1ed2e-152c-432c-85f9-717a4159bbfc,
  abstract     = {The effect of kinship on growth and use of space by individually PIT-tagged 1+ brown trout was studied for 11 weeks in eight stream enclosures. Each enclosure consisted of two sections, separated by a region containing PIT-detecting antennae, which enabled us to measure use of sections by all individuals. Two types of sibling groups were tested, a single sibling group, F1, consisting of four individuals that were reared together in hatchery tank 'a' (F1a) plus four additional siblings of the same family but raised in hatchery tank 'b' (F1b), and a mixed sibling group, consisting of four F1a individuals plus four siblings from a second family, F2. Based on kin theory and earlier laboratory studies, we expected that growth of the F1a individuals in the single sibling group to be greater than that of F1a individuals in the mixed family sibling group, but instead we found just the opposite. The variance of growth did not differ between treatments. Nor was there a difference in time F1a individuals spent together when they were in mixed versus single sibling groups. We did find that F1a individuals changed habitat more frequently than F2 individuals in the mixed sibling group but less frequently than F1b in the single sibling groups. Thus, our predictions based on kin theory for growth and behavior of brown trout were not supported by our data, and we suggest that the role of kin recognition for the ecology of salmonids deserves further attention.},
  author       = {Greenberg, L A and Herrnäs, B and Brönmark, Christer and Dahl, Jonas and Eklöv, A},
  issn         = {0906-6691},
  language     = {eng},
  number       = {4},
  pages        = {251--259},
  publisher    = {Wiley-Blackwell},
  series       = {Ecology of Freshwater Fish},
  title        = {Effects of kinship on growth and movements of brown trout in field enclosures},
  url          = {http://dx.doi.org/10.1034/j.1600-0633.2002.00018.x},
  volume       = {11},
  year         = {2002},
}