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Sex-dependent responses of perch to changes in water clarity and temperature

SYSNO ASEP	0443158
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Sex-dependent responses of perch to changes in water clarity and temperature
Author(s)	Estlander, Satu (BC-A) Nurminen, L. (FI) Mrkvička, Tomáš (BC-A)_RID Olin, M. (FI) Rask, M. (FI) Lehtonen, H. (FI)
Source Title	Ecology of Freshwater Fish. - : Wiley - ISSN 0906-6691 Roč. 24, č. 4 (2015), s. 544-552
Number of pages	9 s.
Language	eng - English
Country	DK - Denmark
Keywords	increasing water colour ; climate change ; European perch ; feeding efficiency ; sexual size dimorphism
Subject RIV	EH - Ecology, Behaviour
Institutional support	BC-A - RVO:60077344
UT WOS	000361010500005
EID SCOPUS	84941056096
DOI	10.1111/eff.12167
Annotation	Rising temperatures and decreasing water transparency of lakes have strong wide ranging effects on fish. Fish responses to various changes in the environment are usually species-dependent, but responses may also vary within species. In general, large individuals are considered to be more sensitive to environmental variation due to higher energy demand, than smaller individuals. Similarly, large individuals require more food to maintain bodily functions and are thus more sensitive to resource and food scarcity. These size-specific responses to environmental gradients are also sex-dependent in species that exhibit sexual size dimorphism (SSD). We studied in enclosures with short-term experiments how rising temperatures and decreasing water transparency regulate the feeding rates of female and male European perch (Perca fluviatilis L.). To explore experimental results, we calculated perch SSD in nine lakes with varying environmental conditions using previously collected field data. The results of the experiments revealed that the combined effect of water transparency and temperature on the feeding rate of fish is gender-dependent: feeding rate of females decreased more than that of males. The experimental results were also supported by field data that revealed a negative relation between water transparency and the magnitude of SSD in perch. Our results suggest that rising temperatures and decreasing water transparency may potentially decrease fish size in a sex-dependent manner. As female size is one of the main demographic traits determining the reproductive success of a fish population, changing environments may have unexpected and far-reaching consequences on fish population dynamics.
Workplace	Biology Centre (since 2006)
Contact	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Year of Publishing	2016

Number of the records: 1