Гідрохімічні показники ставів ДП ДГ «Нивка» ІРГ НААН України в контексті вимог до водного середовища великоротого окуня (Micropterus salmoides Lacepede, 1802)

Abstract

Purpose. Largemouth bass (Micropterus salmoides), a fish native to freshwaters of North America, is adapted within its natural and introduced ranges to freshwater biotopes with temperate climatic conditions. Considering the fact that biotopes in temperate climatic conditions are usually characterized by a significant diversity of physicochemical parameters, it can be concluded that largemouth bass is adapted to a broad range of hydrochemical parameters of the aquatic environment. However, such an adaptive range has its own limiting values, and a long stay of fish in an aquatic environment, the hydrochemical parameters of which approach the upper or lower limit of the adaptive range, can make negatively affect their growth, development, activity, ability to withstand stress factors, as well as inhibit reproductive function. This work examines favorable and unfavorable parameters of the aquatic environment, that have the greatest impact in the process of growing of largemouth bass, as well as an analysis of hydrochemical parameters of ponds of the State Enterprise «Experimental Fish Farm «Nyvka»» of the Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine for the possibility of growing this species. Findings. This paper contains brief information about main hydrochemical parameters that can have a negative impact on largemouth bass within natural or aquaculture water bodies as well as a comparison of their values ​​with some parameters of the aquatic environment of ponds of the State enterprise «Experimental Fish Farm «Nyvka» of the Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine obtained during hydrochemical studies in 2018-2019. Practical value. The information from this review can be used in further cultivation of largemouth bass in full-system warm-water pond fish farms with water supply from rivers with the drainage basin located in areas with a high level of urbanization. Keywords: largemouth bass, Micropterus salmoides, hydrochemical parameters, pond farming, aquaculture, adaptation, mineralization, pH, general hardness.