Shustov Y., Belyakova E., Veselov A. Seasonal feeding habits of fishes in the river Bolshaya Uya (bas. Onega Lake) // Principy èkologii. 2013. № 4. P. 57‒69. DOI: 10.15393/j1.art.2013.3123


Issue № 4

Original research

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Seasonal feeding habits of fishes in the river Bolshaya Uya (bas. Onega Lake)

Shustov
   Yury
DSc, Petrozavodsk State University, shustov@petrsu.ru
Belyakova
   Elena
PhD, Petrozavodsk State University, belyakovalena@yandex.ru
Veselov
   Alexey Elpidiphorovitch
DSc, Institut of biology KarSC RAS, salmo@sampo.ru
Keywords:
trout river
seasonal feeding habits of freshwater fish
nutrition spectra
repletion
Summary: The article deals with the seasonal feeding habits of five fish species (young trout, mustached loach , bullhead - sculpin , stickleback and minnow) in one of the numerous tributaries of the Onega lake, also inhabited by trout. The results of investigation showed that not all the environmental situation are favorable for fish feeding. During the summer droughty period mustached loach limps in search of food due to the low water level. As a result, the intensity of fish feeding is extremely low, and more than half of them (60%) even have empty stomach. In summer feeding period the potential food competitors of juvenile trout may be virtually all river fishes: minnow - for " air " fraction, that is imaginal and subimaginal stages of amphibiotic, airial and terrestrial insects, and mustached loach, bullhead-sculpin, stickleback - for "water "fraction, that is larvae and nymphs of amphibiotic invertebrates.

© Petrozavodsk State University

Reviewer: N. Ilmast
Received on: 13 February 2014
Published on: 08 April 2014

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