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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60077344:_____/17:00480481

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Freshwater Biology

ISSN

0046-5070

e-ISSN

—

Svazek periodika

62

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

1401-1409

Kód UT WoS článku

000405074600008

EID výsledku v databázi Scopus

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