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

Lene Jacobsen, Søren Berg, Henrik Baktoft, P.-A. Nilsson, Christian Skov

Research output: Contribution to journalJournal articleResearchpeer-review

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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 m2) 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
Original languageEnglish
JournalJournal of Limnology
Volume73
Issue number1
Pages (from-to)187-190
ISSN1129-5767
DOIs
Publication statusPublished - 2014

Cite this

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title = "The effect of turbidity and prey fish density on consumption rates of piscivorous Eurasian perch Perca fluviatilis",
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 m2) 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 = "Lene Jacobsen and S{\o}ren Berg and Henrik Baktoft and P.-A. Nilsson and Christian Skov",
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journal = "Journal of Limnology",
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The effect of turbidity and prey fish density on consumption rates of piscivorous Eurasian perch Perca fluviatilis. / Jacobsen, Lene; Berg, Søren; Baktoft, Henrik; Nilsson, P.-A.; Skov, Christian.

In: Journal of Limnology, Vol. 73, No. 1, 2014, p. 187-190.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - The effect of turbidity and prey fish density on consumption rates of piscivorous Eurasian perch Perca fluviatilis

AU - Jacobsen, Lene

AU - Berg, Søren

AU - Baktoft, Henrik

AU - Nilsson, P.-A.

AU - Skov, Christian

PY - 2014

Y1 - 2014

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AB - 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 m2) 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

U2 - 10.4081/jlimnol.2014.837

DO - 10.4081/jlimnol.2014.837

M3 - Journal article

VL - 73

SP - 187

EP - 190

JO - Journal of Limnology

JF - Journal of Limnology

SN - 1129-5767

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