Behavioural strategy of large perch Perca fluviatilis varies between a mesotrophic and a hypereutrophic lake

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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Behavioural strategy of large perch Perca fluviatilis varies between a mesotrophic and a hypereutrophic lake. / Jacobsen, Lene; Berg, Søren; Baktoft, Henrik; Skov, Christian.

In: Journal of Fish Biology, Vol. 86, No. 3, 2015, p. 1016-1029.

Research output: Contribution to journalJournal article – Annual report year: 2015Researchpeer-review

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@article{bcbf523a8c974a2fa476d4d8312906d8,
title = "Behavioural strategy of large perch Perca fluviatilis varies between a mesotrophic and a hypereutrophic lake",
abstract = "Behaviour of large perch Perca fluviatilis was studied in two lakes differing in environmental state i.e. mesotrophic v. hypereutrophic. A total of 20 adult perch P. fluviatilis (29–42 cm total length) in each lake were tagged with radio-transmitters, tracked and located eight times a day during six 24 h tracking periods over a year, enabling detection of differences in diel activity patterns and habitat use during summer and winter under two different environmental regimes. During summer, P. fluviatilis in the mesotrophic lake showed a distinct crepuscular activity pattern and a change from pelagic residency during daytime towards the littoral zone at night. In contrast, P. fluviatilis in the hypereutrophic lake were active during the entire diel cycle and were spread throughout the lake also during dark. During winter, crepuscular patterns of activity were seen in both lakes. Condition factor of large P. fluviatilis did not differ between the two lakes. Thus, it is suggested that P. fluviatilis in the hypereutrophic turbid lake adopted an alternative behaviour for successful foraging, being uniformly active throughout the diel cycle",
author = "Lene Jacobsen and S{\o}ren Berg and Henrik Baktoft and Christian Skov",
year = "2015",
doi = "10.1111/jfb.12613",
language = "English",
volume = "86",
pages = "1016--1029",
journal = "Journal of Fish Biology",
issn = "0022-1112",
publisher = "Wiley-Blackwell",
number = "3",

}

RIS

TY - JOUR

T1 - Behavioural strategy of large perch Perca fluviatilis varies between a mesotrophic and a hypereutrophic lake

AU - Jacobsen, Lene

AU - Berg, Søren

AU - Baktoft, Henrik

AU - Skov, Christian

PY - 2015

Y1 - 2015

N2 - Behaviour of large perch Perca fluviatilis was studied in two lakes differing in environmental state i.e. mesotrophic v. hypereutrophic. A total of 20 adult perch P. fluviatilis (29–42 cm total length) in each lake were tagged with radio-transmitters, tracked and located eight times a day during six 24 h tracking periods over a year, enabling detection of differences in diel activity patterns and habitat use during summer and winter under two different environmental regimes. During summer, P. fluviatilis in the mesotrophic lake showed a distinct crepuscular activity pattern and a change from pelagic residency during daytime towards the littoral zone at night. In contrast, P. fluviatilis in the hypereutrophic lake were active during the entire diel cycle and were spread throughout the lake also during dark. During winter, crepuscular patterns of activity were seen in both lakes. Condition factor of large P. fluviatilis did not differ between the two lakes. Thus, it is suggested that P. fluviatilis in the hypereutrophic turbid lake adopted an alternative behaviour for successful foraging, being uniformly active throughout the diel cycle

AB - Behaviour of large perch Perca fluviatilis was studied in two lakes differing in environmental state i.e. mesotrophic v. hypereutrophic. A total of 20 adult perch P. fluviatilis (29–42 cm total length) in each lake were tagged with radio-transmitters, tracked and located eight times a day during six 24 h tracking periods over a year, enabling detection of differences in diel activity patterns and habitat use during summer and winter under two different environmental regimes. During summer, P. fluviatilis in the mesotrophic lake showed a distinct crepuscular activity pattern and a change from pelagic residency during daytime towards the littoral zone at night. In contrast, P. fluviatilis in the hypereutrophic lake were active during the entire diel cycle and were spread throughout the lake also during dark. During winter, crepuscular patterns of activity were seen in both lakes. Condition factor of large P. fluviatilis did not differ between the two lakes. Thus, it is suggested that P. fluviatilis in the hypereutrophic turbid lake adopted an alternative behaviour for successful foraging, being uniformly active throughout the diel cycle

U2 - 10.1111/jfb.12613

DO - 10.1111/jfb.12613

M3 - Journal article

VL - 86

SP - 1016

EP - 1029

JO - Journal of Fish Biology

JF - Journal of Fish Biology

SN - 0022-1112

IS - 3

ER -