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The effect of turbidity and prey fish density on consumption rates of piscivorous Eurasian perch Perca fluviatilis

Jacobsen, Lene; Berg, Soren; Baktoft, Henrik; Nilsson, Anders LU and Skov, Christian (2014) In Journal of Limnology 73(1). p.187-190
Abstract
Predator-prey interaction strengths in variable environments constitute a fundamental link to the understanding of aquatic ecosystem responses to environmental change. The present study investigates the effects of visibility conditions and prey fish density on predation rates of visually oriented piscivorous Eurasian perch Perca fluviatilis L. This was done in outdoor mesocosm (16 m(2)) experiments with clear water and two levels of turbidity (25 and 105 NTU) and two prey fish densities [3.1 and 12.5 roach Rutilus rutilus (L.) individuals m(-2)]. Perch consumption rates were affected by visibility less than expected, while they were highly affected by increased prey fish density. Perch responded to high prey density in all visibility... (More)
Predator-prey interaction strengths in variable environments constitute a fundamental link to the understanding of aquatic ecosystem responses to environmental change. The present study investigates the effects of visibility conditions and prey fish density on predation rates of visually oriented piscivorous Eurasian perch Perca fluviatilis L. This was done in outdoor mesocosm (16 m(2)) experiments with clear water and two levels of turbidity (25 and 105 NTU) and two prey fish densities [3.1 and 12.5 roach Rutilus rutilus (L.) individuals m(-2)]. Perch consumption rates were affected by visibility less than expected, while they were highly affected by increased prey fish density. Perch responded to high prey density in all visibility conditions, indicating that prey density is more crucial for consumption than visibility in turbid lakes. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
visibility, roach prey, mesocosm, piscivory, hunting mode
in
Journal of Limnology
volume
73
issue
1
pages
187 - 190
publisher
Page Press
external identifiers
  • wos:000338928300017
  • scopus:84893061336
ISSN
1129-5767
DOI
10.4081/jlimnol.2014.837
language
English
LU publication?
yes
id
b182504a-b97f-458b-9ae5-dbc9530d2d1e (old id 4598845)
date added to LUP
2014-09-05 10:55:07
date last changed
2017-11-19 03:43:15
@article{b182504a-b97f-458b-9ae5-dbc9530d2d1e,
  abstract     = {Predator-prey interaction strengths in variable environments constitute a fundamental link to the understanding of aquatic ecosystem responses to environmental change. The present study investigates the effects of visibility conditions and prey fish density on predation rates of visually oriented piscivorous Eurasian perch Perca fluviatilis L. This was done in outdoor mesocosm (16 m(2)) experiments with clear water and two levels of turbidity (25 and 105 NTU) and two prey fish densities [3.1 and 12.5 roach Rutilus rutilus (L.) individuals m(-2)]. Perch consumption rates were affected by visibility less than expected, while they were highly affected by increased prey fish density. Perch responded to high prey density in all visibility conditions, indicating that prey density is more crucial for consumption than visibility in turbid lakes.},
  author       = {Jacobsen, Lene and Berg, Soren and Baktoft, Henrik and Nilsson, Anders and Skov, Christian},
  issn         = {1129-5767},
  keyword      = {visibility,roach prey,mesocosm,piscivory,hunting mode},
  language     = {eng},
  number       = {1},
  pages        = {187--190},
  publisher    = {Page Press},
  series       = {Journal of Limnology},
  title        = {The effect of turbidity and prey fish density on consumption rates of piscivorous Eurasian perch Perca fluviatilis},
  url          = {http://dx.doi.org/10.4081/jlimnol.2014.837},
  volume       = {73},
  year         = {2014},
}