Some like it deep: Intraspecific niche segregation in ruffe (Gymnocephalus cernua)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895620" target="_blank" >RIV/60076658:12310/17:43895620 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/17:00480481

Result on the web

<a href="http://onlinelibrary.wiley.com/doi/10.1111/fwb.12953/epdf" target="_blank" >http://onlinelibrary.wiley.com/doi/10.1111/fwb.12953/epdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/fwb.12953" target="_blank" >10.1111/fwb.12953</a>

Result language

angličtina

Original language name

Some like it deep: Intraspecific niche segregation in ruffe (Gymnocephalus cernua)

Original language description

Generalist fishes commonly show intraspecific niche segregation along the littoral-pelagic resource axis in lakes. Recent studies have shown that the deep, cold and seemingly unproductive profundal zone can also offer underutilised resources and facilitate specialised individuals, and can contribute to lake food webs via methane-derived carbon pathways. Despite numerous examples from salmonid fish species, such intraspecific niche segregation along a littoral-profundal resource axis has not been reported in percids or other predominantly littoral benthivorous fishes. Here, we describe a case of ruffe (Gymnocephalus cernua: Percidae) populations consisting of shallow- and deep-water dwelling individuals in two post-mining lakes in the northern Czech Republic. Results from stable isotope (N-15 and C-13) mixing models indicated that littoral and profundal food resources dominated the long-term diets of ruffe individuals caught from shallow- and deep-water habitats, respectively. No similar niche segregation along the littoral-profundal gradient was observed in coexisting perch (Perca fluviatilis: Percidae) which used more pelagic food than the benthivorous ruffe. The observed littoral-profundal niche segregation in ruffe was more pronounced in the macrophyte-rich and poorly oxygenated Lake Milada, where high habitat complexity and strong interspecific interactions in the littoral zone as well as the absence of competing fish species in the profundal zone likely promote narrow trophic niches of shallow- and deep-water dwelling ruffe Our study provides novel evidence of littoral-profundal niche segregation in a predominantly benthivorous fish species. The results also show that intraspecific niche variation can be affected by lake ecosystem characteristics, in particular by the availability of and competition for littoral and profundal resources.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10617 - Marine biology, freshwater biology, limnology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Freshwater Biology

ISSN

0046-5070

e-ISSN

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Volume of the periodical

62

Issue of the periodical within the volume

8

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

1401-1409

UT code for WoS article

000405074600008

EID of the result in the Scopus database

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