TROPHIC RELATION AND NUTRITIONAL STATE OF THE PERCH PERCA FLUVIATILIS L., 1758 (PERCIDAE) FROM K. SATPAEV'S CHANNEL RESERVOIRS
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2013, Vol 0, Issue 2
Abstract
The perch Perca fluviatilis L., 1758 (Percidae) is a one of the mass species of fishes fauna of K. Satpaev's (formerly Irtysh-Karaganda) channel waters. This species is feeding more than 20 species of benthos, nekton organisms and fishes. The nekton crustacean and fish have the most important value for perch feeding. The feeding intensity is about 40 %. The perch is feeding while spawning too. Perch population has a tendency of nutritional state decrease while moving from south to north. Old individuals and males are more well-fed in comparison with young species and females. The nutritional state of perch from the reservoirs of K. Satpaev's channel is at high level. The value of a perch in a food of other predators is ambiguous and varied throughout the time of research. In connection with undesirability of a high abundance of the species in industrial fish community the actions for decrease in its number are necessary to be carried out.
Authors and Affiliations
Kraynyuk Nickolaevich , Assylbekova Zhangirovna
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