Conditions for the development of crayfish stocks in the Veselovsky Reservoir
Crayfish is a long-established fisheries target in the water bodies of the Rostov Region. This work presents the data characterizing the pollution of water and bottom sediments with petroleum products, organochlorine pesticides, and heavy metals. The changes in the biological parameters of the crayfish population in the reservoir have been reviewed. The status of crayfish population, their stocks and abundance in the reservoir are conditional upon the existing range of abiotic and anthropogenic factors. The ecological improvement of the environment in 2020–2022 and the low concentrations of petroleum products, organochlorine pesticides and heavy metals facilitated the recovery of the crayfish exploitable stock that reached 32.9 t in 2022. In the consistently favourable conditions, under a regular monitoring of the productive crayfish populations, sustainable exploitation of their stocks and responsible control over their harvesting implemented by the fisheries protection authorities, this reservoir will retain its crayfish commercial importance.
| Main Authors: | , , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2023
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| Subjects: | Crayfish population structure, Exploitable stock, Среда обитания, Промысловый запас, Структура популяции, Загрязнение, Степень зарастаемости, Гидрологический режим, Общая минерализация воды, Состояние популяции, Речные раки, Оценка загрязнения, Изменение среднесуточной температуры, Размерная структура, ASFA_2015::A::Abiotic factors, ASFA_2015::S::Stock assessment, ASFA_2015::C::Crustacean fisheries, ASFA_2015::P::Population structure, |
| Online Access: | http://hdl.handle.net/1834/42949 |
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| Summary: | Crayfish is a long-established fisheries target in the water bodies of the Rostov Region. This work presents the data characterizing the pollution of water and bottom sediments with petroleum products, organochlorine pesticides, and heavy metals. The changes in the biological parameters of the crayfish population in the reservoir have been reviewed. The status of crayfish population, their stocks and abundance in the reservoir are conditional upon the existing range of abiotic and anthropogenic factors. The ecological improvement of the environment in 2020–2022 and the low concentrations of petroleum products, organochlorine pesticides and heavy metals facilitated the recovery of the crayfish exploitable stock that reached 32.9 t in 2022. In the consistently favourable conditions, under a regular monitoring of the productive crayfish populations, sustainable exploitation of their stocks and responsible control over their harvesting implemented by the fisheries protection authorities, this reservoir will retain its crayfish commercial importance. |
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