Number of the records: 1  

Stable isotopes and gut contents indicate differential resource use by coexisting asp (Leuciscus aspius) and pikeperch (Sander lucioperca)

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    SYSNO ASEP0494915
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleStable 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, ORCID
    Source TitleEcology of Freshwater Fish. - : Wiley - ISSN 0906-6691
    Roč. 27, č. 4 (2018), s. 1054-1065
    Number of pages12 s.
    Languageeng - English
    CountryDK - Denmark
    Keywordsdietary ontogeny ; foraging strategy ; interspecific competition ; piscivory ; stable isotopes
    Subject RIVEG - Zoology
    OECD categoryZoology
    R&D Projects7F14316 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
    GA15-01625S GA ČR - Czech Science Foundation (CSF)
    Institutional supportBC-A - RVO:60077344
    UT WOS000445181800015
    EID SCOPUS85053596547
    DOI10.1111/eff.12414
    AnnotationDifferential 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.
    WorkplaceBiology Centre (since 2006)
    ContactDana Hypšová, eje@eje.cz, Tel.: 387 775 214
    Year of Publishing2019
Number of the records: 1  

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