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Do instream habitat variables and the abundance of brown trout Salmo trutta (L.) affect the distribution and growth of stone loach, Barbatula barbatula (L.)?

Nilsson, Erika LU and Persson, Anders LU (2005) In Ecology of Freshwater Fish 14(1). p.40-49
Abstract
Along a stream, we investigated whether the abundance of stone loach (Barbatula barbatula, L.) was related to the presence of brown trout (Salmo trutta, L.) and instream habitat variables. First, a field survey was carried out where different habitat variables and the densities of both species were quantified and subjected to principal components analysis. Then the abundance of stone loach was related to the scores of the retained axes (eigenvalues >1). The abundance of stone loach was positively correlated to substrate particle size, amount of shade, temperature, discharge and current velocity, but negatively correlated to brown trout abundance. Secondly, a month-long field enclosure experiment in a stream was performed to test for any... (More)
Along a stream, we investigated whether the abundance of stone loach (Barbatula barbatula, L.) was related to the presence of brown trout (Salmo trutta, L.) and instream habitat variables. First, a field survey was carried out where different habitat variables and the densities of both species were quantified and subjected to principal components analysis. Then the abundance of stone loach was related to the scores of the retained axes (eigenvalues >1). The abundance of stone loach was positively correlated to substrate particle size, amount of shade, temperature, discharge and current velocity, but negatively correlated to brown trout abundance. Secondly, a month-long field enclosure experiment in a stream was performed to test for any negative effects of brown trout on stone loach growth. Four treatments were used: intraspecific competition (stone loach at double density), interspecific competition (stone loach + small trout), predation (stone loach + large trout) and a control (stone loach alone). The results showed that large trout tended to have negative effects on final stone loach biomass. The absence of a negative effect of large trout on resource density suggests that nonlethal effects rather than resource competition caused this trend. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ecology of Freshwater Fish
volume
14
issue
1
pages
40 - 49
publisher
Wiley-Blackwell
external identifiers
  • wos:000226855100004
  • scopus:14344260724
ISSN
0906-6691
DOI
10.1111/j.1600-0633.2004.00074.x
language
English
LU publication?
yes
id
c7137605-fdeb-4889-bf4e-7097b2f95108 (old id 146514)
date added to LUP
2007-06-28 14:44:41
date last changed
2017-01-01 07:26:15
@article{c7137605-fdeb-4889-bf4e-7097b2f95108,
  abstract     = {Along a stream, we investigated whether the abundance of stone loach (Barbatula barbatula, L.) was related to the presence of brown trout (Salmo trutta, L.) and instream habitat variables. First, a field survey was carried out where different habitat variables and the densities of both species were quantified and subjected to principal components analysis. Then the abundance of stone loach was related to the scores of the retained axes (eigenvalues >1). The abundance of stone loach was positively correlated to substrate particle size, amount of shade, temperature, discharge and current velocity, but negatively correlated to brown trout abundance. Secondly, a month-long field enclosure experiment in a stream was performed to test for any negative effects of brown trout on stone loach growth. Four treatments were used: intraspecific competition (stone loach at double density), interspecific competition (stone loach + small trout), predation (stone loach + large trout) and a control (stone loach alone). The results showed that large trout tended to have negative effects on final stone loach biomass. The absence of a negative effect of large trout on resource density suggests that nonlethal effects rather than resource competition caused this trend.},
  author       = {Nilsson, Erika and Persson, Anders},
  issn         = {0906-6691},
  language     = {eng},
  number       = {1},
  pages        = {40--49},
  publisher    = {Wiley-Blackwell},
  series       = {Ecology of Freshwater Fish},
  title        = {Do instream habitat variables and the abundance of brown trout Salmo trutta (L.) affect the distribution and growth of stone loach, Barbatula barbatula (L.)?},
  url          = {http://dx.doi.org/10.1111/j.1600-0633.2004.00074.x},
  volume       = {14},
  year         = {2005},
}