MODERN SITUATION OF THE FISH POPULATION AND MORPHOLOGICAL CHARACTERISTICS OF BREAM ABRAMIS BRAMA (L.) INHABITED IN THE RIVER CHULYM (BASIN OF THE RIVER OB)
Abstract
The article reveals data on bream inhabitance and its significance in fishing in the midstream basin of the river Chulym. The paper analyzes the catch and reveals the fact that bream catch is equal to the catch of wild fish in the river Chulym. The authors demonstrate morphological characteristics of the bream. They reveal the tendencies in changes of plastic features according to the sex and age and length features of the bream. The research studied bream males and females and their 25 plastic features; it found out bream males and females have variations on 8 features. Variations on 2 features were of great significance. The analysis of age and length variations revealed 3 groups of features which demonstrated different relation to linear growth of fish (the authors applied method of correlation analysis). The first group contains features which show weak relation between fish length (length of the head) and these features. The second group includes features demonstrating positive allometric growth; the third group contains features demonstrating negative allometric growth. The article reveals comparative analysis of plastic features between the midstream Chulym bream and the midstream Ob bream in order to estimate environmental variation. The samples were compared on 25 features and differed on 6 features. The authors found out the bream inhabited in the midstream Chulym is much similar to population of the Ob bream population.
About the Authors
D. V. ZlotnikRussian Federation
V. I. Romanov
Russian Federation
References
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Review
For citations:
Zlotnik D.V., Romanov V.I. MODERN SITUATION OF THE FISH POPULATION AND MORPHOLOGICAL CHARACTERISTICS OF BREAM ABRAMIS BRAMA (L.) INHABITED IN THE RIVER CHULYM (BASIN OF THE RIVER OB). Bulletin of NSAU (Novosibirsk State Agrarian University). 2015;(1):132-137. (In Russ.)