GROWTH RATE OF SQUALIUS ORPHEUS (KOTTELAT AND ECONOMIDIS 2007) IN THE RIVERS CHEPINSKA AND VACHA

Fish populations from both rivers are characterized by disturbed age structure and predominance of young individuals. The fish also consumes larger animal organisms such as small frogs and small fish. [...]the species feeds on algae and fruits of coastal plants (Mikhailova, 1964). [...]water outflow...

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Bibliographic Details
Published in:Poljoprivreda i šumarstvo 2022-06, Vol.68 (2), p.109-120
Main Author: KOLEV, Vasil
Format: Article
Language:English
Subjects:
Age
Age composition
Algae
Coastal waters
Fish
Fish populations
Frogs
Growth rate
Hydroelectric plants
Hydroelectric power
Population
Rivers
Scales
Water temperature
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Summary:Fish populations from both rivers are characterized by disturbed age structure and predominance of young individuals. The fish also consumes larger animal organisms such as small frogs and small fish. [...]the species feeds on algae and fruits of coastal plants (Mikhailova, 1964). [...]water outflow after the cascade is strongly influenced by an operation of a hydropower plant. (1) where: L - Length of fish (mm) S - Diagonal caudal radius of the fish scales (eyepiece micrometer scales divisions) a, b - Equation Coefficients Net weight (W) values were estimated, using the equation described by Ricker (1975) and applied by many authors (Zhivkov 1993, 1999, Raikova-Petrova and Zhivkov 1993, Kukushkin, 1997, Belomacheva et al. 2000). ..
ISSN:0554-5579
1800-9492
DOI:10.17707/AgricultForest.68.2.08