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The Density and Production of Fish Populations in the Klíčava Reservoir (Czechoslovakia) and their Changes During the Period 1957‐1970
Author(s) -
Holčík Juraj,
Pivnička Karel
Publication year - 1972
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.19720570605
Subject(s) - fish <actinopterygii> , period (music) , yield (engineering) , production (economics) , standing crop , population , material balance , geography , environmental science , fishery , physical geography , ecology , biology , demography , engineering , economics , biomass (ecology) , physics , materials science , macroeconomics , sociology , process engineering , acoustics , metallurgy
The results of 14 years of observations are reported concerning the species composition, ichthyomass (standing crop), total and available production, harvestable yield and balance of the fish population in the Klíčava reservoir (67 ha of area) in central Bohemia. Two stages of the reservoir development with regard to its fish are recognized and characterized. Some phenomena concerning the course of the ichthyomass and production, and the reasons for their fluctuations are discussed.