Status of natural feed resources and habitat of crayfish in the basin of the Sal River
Crayfish is a well-established fishing target in the basin of the Sal River within the Rostov Region. The climate change causing unstable hydrological conditions, as well as the extensive anthropogenic activity have a significant impact on aquatic biological resources. This work was aimed at the investigation of the status of the water bodies and exploitable biological resources (crayfish) in the water bodies of the Sal River Basin, with the anthropogenic pressure and climate changes taken into account. A retrospective analysis of the following parameters has been carried out: hydrological regime of the Sal River Basin since 1937, of the habitat conditions and status of the crayfish population (2012–2021), and the status of its feeding resources (2000–2013) in the context of anthropogenic activities and climate change. It has been found out that the hydrological regime of the water-deficient basin of the Sal River since the mid-1970s has been characterized by a decreased runoff during the spring flood and an increased runoff during the winter and summer–autumn low water period due to air temperature increase in the cold season. Due to the decrease in the water content of the Sal River Basin, the stream water supply lessened and the content of sulfates, chlorides and total dissolved solids in water increased, which resulted in the change of the water type from the hydrocarbonate to the sulfate one. These changes in the concentrations and ratios of salt-forming ions have been also caused by decreased precipitation and an increased feed of ground- and underground waters to the rivers of this basin. The priority toxicants and active ingredients of the pesticides of modern classes found in the water and bottom sediments of the Sal River did not affect the growth and reproduction of the crayfish. Commercial productivity of crayfish stock has shown a trend toward decrease, which resulted from the changes in some observed climate parameters (an increase in air temperature, a decrease in water content in the Sal River Basin), as well as from the increase in total dissolved solids in the water. However, the hydrochemical regime remains to be relatively favorable for life sustenance of the bottom species of aquatic animals, and the anthropogenic pollution of the ecosystem with priority toxicants is low, which makes it possible for the population to maintain stable length composition and similar quantitative values for different length classes of crayfish, as well as its reproduction capacity.
Main Authors: | , , , , , , , , , , , , |
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Format: | Journal Contribution biblioteca |
Language: | Russian |
Published: |
2022
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Subjects: | Heavy metals, Precipitation, Habitats, Organochlorine pesticides, Polychlorinated biphenyls, Toxicants, Тяжелые металлы, Минерализация воды, Полихлорированные бифенилы, Хлорорганические пестициды, Ракопродуктивность, ASFA_2015::C::Crayfish fisheries, ASFA_2015::A::Anthropogenic effects, ASFA_2015::F::Food resources, |
Online Access: | http://hdl.handle.net/1834/42514 |
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Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources |
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Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources Saenko, E.M. Zhukova, S.V. Kosenko, Yu.V. Korablina, I.V. Trushkov, A.V. Marchenko, A.O. Valiullin, V.A. Zinchuk, O.A. Karpushina, Yu.E. Taradina, E.A. Burlachko, D.S. Lutynskaya, L.A. Podmareva, T.I. Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
description |
Crayfish is a well-established fishing target in the basin of the Sal River within the Rostov Region. The climate change causing unstable hydrological conditions, as well as the extensive anthropogenic activity have a significant impact on aquatic biological resources. This work was aimed at the investigation of the status of the water bodies and exploitable biological resources (crayfish) in the water bodies of the Sal River Basin, with the anthropogenic pressure and climate changes taken into account. A retrospective analysis of the following parameters has been carried out: hydrological regime of the Sal River Basin since 1937, of the habitat conditions and status of the crayfish population (2012–2021), and the status of its feeding resources (2000–2013) in the context of anthropogenic activities and climate change. It has been found out that the hydrological regime of the water-deficient basin of the Sal River since the mid-1970s has been characterized by a decreased runoff during the spring flood and an increased runoff during the winter and summer–autumn low water period due to air temperature increase in the cold season. Due to the decrease in the water content of the Sal River Basin, the stream water supply lessened and the content of sulfates, chlorides and total dissolved solids in water increased, which resulted in the change of the water type from the hydrocarbonate to the sulfate one. These changes in the concentrations and ratios of salt-forming ions have been also caused by decreased precipitation and an increased feed of ground- and underground waters to the rivers of this basin. The priority toxicants and active ingredients of the pesticides of modern classes found in the water and bottom sediments of the Sal River did not affect the growth and reproduction of the crayfish. Commercial productivity of crayfish stock has shown a trend toward decrease, which resulted from the changes in some observed climate parameters (an increase in air temperature, a decrease in water content in the Sal River Basin), as well as from the increase in total dissolved solids in the water. However, the hydrochemical regime remains to be relatively favorable for life sustenance of the bottom species of aquatic animals, and the anthropogenic pollution of the ecosystem with priority toxicants is low, which makes it possible for the population to maintain stable length composition and similar quantitative values for different length classes of crayfish, as well as its reproduction capacity. |
format |
Journal Contribution |
topic_facet |
Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources |
author |
Saenko, E.M. Zhukova, S.V. Kosenko, Yu.V. Korablina, I.V. Trushkov, A.V. Marchenko, A.O. Valiullin, V.A. Zinchuk, O.A. Karpushina, Yu.E. Taradina, E.A. Burlachko, D.S. Lutynskaya, L.A. Podmareva, T.I. |
author_facet |
Saenko, E.M. Zhukova, S.V. Kosenko, Yu.V. Korablina, I.V. Trushkov, A.V. Marchenko, A.O. Valiullin, V.A. Zinchuk, O.A. Karpushina, Yu.E. Taradina, E.A. Burlachko, D.S. Lutynskaya, L.A. Podmareva, T.I. |
author_sort |
Saenko, E.M. |
title |
Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
title_short |
Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
title_full |
Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
title_fullStr |
Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
title_full_unstemmed |
Status of natural feed resources and habitat of crayfish in the basin of the Sal River |
title_sort |
status of natural feed resources and habitat of crayfish in the basin of the sal river |
publishDate |
2022 |
url |
http://hdl.handle.net/1834/42514 |
work_keys_str_mv |
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dig-aquadocs-1834-425142023-02-21T02:17:05Z Status of natural feed resources and habitat of crayfish in the basin of the Sal River Состояние сырьевой базы и среды обитания раков в бассейне р. Сал Saenko, E.M. Zhukova, S.V. Kosenko, Yu.V. Korablina, I.V. Trushkov, A.V. Marchenko, A.O. Valiullin, V.A. Zinchuk, O.A. Karpushina, Yu.E. Taradina, E.A. Burlachko, D.S. Lutynskaya, L.A. Podmareva, T.I. Heavy metals Precipitation Habitats Organochlorine pesticides Polychlorinated biphenyls Toxicants Тяжелые металлы Минерализация воды Полихлорированные бифенилы Хлорорганические пестициды Ракопродуктивность ASFA_2015::C::Crayfish fisheries ASFA_2015::A::Anthropogenic effects ASFA_2015::F::Food resources Crayfish is a well-established fishing target in the basin of the Sal River within the Rostov Region. The climate change causing unstable hydrological conditions, as well as the extensive anthropogenic activity have a significant impact on aquatic biological resources. This work was aimed at the investigation of the status of the water bodies and exploitable biological resources (crayfish) in the water bodies of the Sal River Basin, with the anthropogenic pressure and climate changes taken into account. A retrospective analysis of the following parameters has been carried out: hydrological regime of the Sal River Basin since 1937, of the habitat conditions and status of the crayfish population (2012–2021), and the status of its feeding resources (2000–2013) in the context of anthropogenic activities and climate change. It has been found out that the hydrological regime of the water-deficient basin of the Sal River since the mid-1970s has been characterized by a decreased runoff during the spring flood and an increased runoff during the winter and summer–autumn low water period due to air temperature increase in the cold season. Due to the decrease in the water content of the Sal River Basin, the stream water supply lessened and the content of sulfates, chlorides and total dissolved solids in water increased, which resulted in the change of the water type from the hydrocarbonate to the sulfate one. These changes in the concentrations and ratios of salt-forming ions have been also caused by decreased precipitation and an increased feed of ground- and underground waters to the rivers of this basin. The priority toxicants and active ingredients of the pesticides of modern classes found in the water and bottom sediments of the Sal River did not affect the growth and reproduction of the crayfish. Commercial productivity of crayfish stock has shown a trend toward decrease, which resulted from the changes in some observed climate parameters (an increase in air temperature, a decrease in water content in the Sal River Basin), as well as from the increase in total dissolved solids in the water. However, the hydrochemical regime remains to be relatively favorable for life sustenance of the bottom species of aquatic animals, and the anthropogenic pollution of the ecosystem with priority toxicants is low, which makes it possible for the population to maintain stable length composition and similar quantitative values for different length classes of crayfish, as well as its reproduction capacity. Раки являются традиционным объектом промысла в бассейне р. Сал в границах Ростовской области. Климатические изменения, обуславливающие нестабильные гидрологические условия, и активная хозяйственная деятельность оказывают существенное влияние на водные биоресурсы. Целью работы стало изучение состояния водных объектов и промысловых биоресурсов (раки) в водоемах бассейна р. Сал с учетом антропогенного воздействия и климатических изменений. Проведен ретроспективный анализ гидрологического режима бассейна р. Сал с 1937 г., условий среды обитания и состояния популяции раков (2012–2021 гг.), а также их кормовой базы (2000–2013 гг.) под влиянием антропогенного воздействия и климатических изменений. Установлено, что гидрологический режим вододефицитного бассейна р. Сал с середины 1970-х гг. характеризуется снижением стока весеннего половодья и увеличением стока зимней и летне-осенней межени в связи с повышением температуры воздуха в холодный период года. Вследствие снижения водности бассейна р. Сал уменьшились русловые запасы водотоков, увеличилось содержание в воде сульфатов и хлоридов и повысилась общая минерализация воды со сменой типа вод с гидрокарбонатного на сульфатный. Данные изменения концентраций и соотношения солеобразующих ионов обусловлены также снижением атмосферных осадков и увеличением роли грунтовых и подземных вод в питании рек данного бассейна. Концентрации приоритетных токсикантов и действующих веществ пестицидов современных классов в воде и донных отложениях в устье р. Сал не оказывали негативного влияния на рост и размножение раков. Отмечена тенденция снижения промысловой ракопродуктивности популяции раков в результате изменения ряда наблюдаемых климатических параметров (рост температуры воздуха, снижение водности в бассейне р. Сал) и роста минерализации воды. Однако сохранение относительно благоприятного для жизнедеятельности придонных видов водных биологических ресурсов гидрохимического режима и низкого уровня антропогенного загрязнения экосистемы приоритетными токсикантами позволяет популяции сохранять стабильную размерную структуру и близкие количественные показатели размерных групп раков и плодовитости. Published Refereed 2023-02-20T12:43:27Z 2023-02-20T12:43:27Z 2022 Journal Contribution 2618-8147 print 2619-1024 online 10.47921/2619-1024_2022_5_4_35 http://hdl.handle.net/1834/42514 ru https://journal.azniirkh.ru/ Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ pp.35-51 Sal River Rostov Region Река Сал Ростовская область Россия |