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Stable isotopes and gut contents indicate differential resource use by coexisting asp (Leuciscus aspius) and pikeperch (Sander lucioperca)
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SYSNO ASEP 0494915 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Stable isotopes and gut contents indicate differential resource use by coexisting asp (Leuciscus aspius) and pikeperch (Sander lucioperca) Author(s) Vašek, Mojmír (BC-A) RID, ORCID
Eloranta, A. P. (NO)
Vejříková, Ivana (BC-A) RID, ORCID
Blabolil, Petr (BC-A) RID, ORCID
Říha, Milan (BC-A) RID, ORCID
Jůza, Tomáš (BC-A) RID, ORCID
Šmejkal, Marek (BC-A) RID, ORCID
Matěna, Josef (BC-A) RID
Kubečka, Jan (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCIDSource Title Ecology of Freshwater Fish. - : Wiley - ISSN 0906-6691
Roč. 27, č. 4 (2018), s. 1054-1065Number of pages 12 s. Language eng - English Country DK - Denmark Keywords dietary ontogeny ; foraging strategy ; interspecific competition ; piscivory ; stable isotopes Subject RIV EG - Zoology OECD category Zoology R&D Projects 7F14316 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA15-01625S GA ČR - Czech Science Foundation (CSF) Institutional support BC-A - RVO:60077344 UT WOS 000445181800015 EID SCOPUS 85053596547 DOI 10.1111/eff.12414 Annotation Differential use of habitat and prey resources is an important mechanism that may allow coexistence of sympatric species. Unlike interactions between smaller cyprinid and percid fishes, the resource use by coexisting predatory asp (Leuciscus aspius) and pikeperch (Sander lucioperca) is relatively unknown. Here, gut content and stable isotope analyses were used to study ontogenetic dietary shifts and interspecific trophic niche overlap between asp and pikeperch coexisting in two reservoirs. The hypothesis that both species show an ontogenetic dietary shift from small invertebrates to large fish prey, but at the same time use different prey resources to reduce potential competitive interactions, was validated. The isotopic niches of the two predators showed no, or only a moderate, degree of overlap (0%-65%). The ontogenetic changes in the degree of interspecific isotopic niche overlap were different in the two reservoirs, suggesting that trophic segregation can be dynamic and variable among systems. Gut contents revealed that small (<100mm standard length) asp consumed mostly terrestrial invertebrates and emerged aquatic insects, whereas small pikeperch foraged on zooplankton, larval and pupal stages of aquatic insects and fish. Larger individuals (>100mm) of both species were predominantly piscivorous, with asp consuming more cyprinid prey and pikeperch more percid prey. Coexisting asp and pikeperch populations are able to utilise different prey resources, thereby reducing potential negative competitive interactions. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2019
Number of the records: 1