Influence of environmental parameters on growth pattern and population structure of Carassius auratus gibelio in Eastern Ukraine |
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Authors: | R Liasko A Koulish A Pogrebniak O Papiggioti L Taranenko and I Leonardos |
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Institution: | (1) Laboratory of Zoology, Department of Biological Applications and Technologies, University of Ioannina, 451 10 Ioannina, Greece;(2) Institute of Fisheries, Ukrainian Academy of Agrarian Sciences, Slaviansk, Ukraine;(3) Department of Zoology, Biological Faculty, National University of Donetsk, Donetsk, Ukraine; |
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Abstract: | Population structure and growth parameters of Prussian carp (Carassius auratus gibelio) were studied in 12 freshwater ecosystems of the Donbass region (Eastern Ukraine). These ecosystems differed significantly
with respect to their surface area, water transparency and annual concentrations of phosphorus and nitrogen. Amongst the studied
ecosystems, diploid males and females as well as a smaller percentage of triploid females were found. The population structure
of C. a. gibelio varied significantly in terms of the percentage of triploids and sex ratio amongst diploids. A considerable proportion of
triploid females (>10%) was found in four ecosystems with intermediate surface area (38–50 ha) and relatively high growth
rate of specimens. The sex ratio amongst diploids was significantly female-biased in seven of 12 ecosystems, including those
where triploids were present in considerable numbers. The growth parameters of Prussian carp were significantly correlated
with ecosystem characteristics, but the growth patterns of diploids and triploids were not significantly different from each
other. The restricted distribution of triploid specimens suggests that the triploid form might counter diverse environmental
challenges, whereas the diploid form of Prussian carp seems to be efficiently adapted to a wide range of ecosystem conditions. |
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