EFFECTS OF ECOLOGICAL CONDITIONS ACROSS DIFFERENT FISH FARMING ZONES ON THE REPRODUCTIVE BIOLOGY AND BROODSTOCK FORMATION OF GRASS CARP (CTENOPHARYNGODON IDELLA VALENCIENNES, 1844).
DOI:
https://doi.org/10.37547/Keywords:
Grass carp, fish farming zones, reproduction, broodstock, hydrochemistry, ecological factors, accumulated temperature, pond aquaculture.Abstract
This study evaluates the biological and reproductive characteristics of grass carp (Ctenopharyngodon idella Valenciennes, 1844) and the ecological factors affecting broodstock formation under the conditions of the seventh fish farming zone of Uzbekistan. Fish farming zones were comparatively assessed according to accumulated thermal units, hydrochemical parameters, and environmental conditions. The results demonstrate that the climatic conditions of Uzbekistan, characterized by accumulated temperatures exceeding 3000 °C·days and water temperatures of 22–28 °C, provide favorable conditions for rapid growth and early sexual maturation, with males reaching maturity at approximately three years and females at 3–4 years of age. The findings provide a scientific basis for broodstock management and the development of intensive pond aquaculture technologies.
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