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Hydrobiological Journal
Rédacteur en chef adjoint: V.I. Yurishinets (open in a new tab)
Secrétaire exécutif du comité de rédaction: L.I. Kalinina (open in a new tab)

Publication de 6  numéros par an

ISSN Imprimer: 0018-8166

ISSN En ligne: 1943-5991

SJR: 0.221 SNIP: 0.469 CiteScore™:: 0.9 H-Index: 12

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Peculiarities of Summer Feeding and Trophic Specialization of Juvenile Perch in the Krivoye Lake (Northern Karelia)

Volume 56, Numéro 2, 2020, pp. 41-49
DOI: 10.1615/HydrobJ.v56.i2.40
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RÉSUMÉ

In summer of 2004-2009 the composition of stomach content in Perca fluviatilis on the benthos-eating stage (fullness index, frequency of occurrence and mass fraction of food objects) and biomass proportion of main macrozoobenthic groups were studied in oligotrophic subarctic lake (Krivoye Lake, Northern Karelia). The coastal amphipod Gammarus lacustris was the main feeding object of perch in the lake. The expressed specialization of perch feeding on large invertebrates (> 10 mm) and summer shift were revealed; summer shift in preferred food objects (from amphipods G. lacustris to insects larvae) depends on availability of large dominants in the lake benthos.

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