Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil

The goal of this study was to characterize current water quality, simulate water quality in 8 large artificial reservoirs occurring along the course of the Paranapanema River, Brazil, and estimate fish production in the region to assess the impacts of this production on the local aquatic environment...

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Autores principales:	RM Neto, HR Nocko, A Ostrensky
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/59c6f5e2e5794c0fb1d7549bb051b015
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spelling	oai:doaj.org-article:59c6f5e2e5794c0fb1d7549bb051b0152021-11-16T10:32:23ZEnvironmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil1869-215X1869-753410.3354/aei00130https://doaj.org/article/59c6f5e2e5794c0fb1d7549bb051b0152015-04-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v6/n3/p255-272/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534The goal of this study was to characterize current water quality, simulate water quality in 8 large artificial reservoirs occurring along the course of the Paranapanema River, Brazil, and estimate fish production in the region to assess the impacts of this production on the local aquatic environment. Primary data describing the bottom sediments and water quality, and time series recorded between 2001 and 2011 were used. Water quality was modeled to simulate the trophic state index (TSI) for each reservoir, and 37 fish cage farms along the length of those reservoirs were identified. Only one-third of these farms had environmental licensing for regular operations. The potential increase in fish production was estimated to exceed 250% in the short to medium term. The concentrations of nutrients (organic matter, nitrogen, and phosphorus) present in the bottom sediment beyond areas of fish production were similar to those found in areas distant from the fish farms. The TSI results indicated that the reservoirs could be classified between oligotrophic and mesotrophic. The few eutrophied areas represented approximately 1% on average of the total area of the reservoirs. The reservoirs of the Paranapanema River have adequate water quality standards for aquaculture, and there is no indication that this activity is currently causing significant impacts to the overall aquatic environment in each reservoir. Nevertheless, caution is required when selecting areas for new fish farms to avoid areas that are more susceptible to eutrophication.RM NetoHR NockoA OstrenskyInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 6, Iss 3, Pp 255-272 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 RM Neto HR Nocko A Ostrensky Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
description	The goal of this study was to characterize current water quality, simulate water quality in 8 large artificial reservoirs occurring along the course of the Paranapanema River, Brazil, and estimate fish production in the region to assess the impacts of this production on the local aquatic environment. Primary data describing the bottom sediments and water quality, and time series recorded between 2001 and 2011 were used. Water quality was modeled to simulate the trophic state index (TSI) for each reservoir, and 37 fish cage farms along the length of those reservoirs were identified. Only one-third of these farms had environmental licensing for regular operations. The potential increase in fish production was estimated to exceed 250% in the short to medium term. The concentrations of nutrients (organic matter, nitrogen, and phosphorus) present in the bottom sediment beyond areas of fish production were similar to those found in areas distant from the fish farms. The TSI results indicated that the reservoirs could be classified between oligotrophic and mesotrophic. The few eutrophied areas represented approximately 1% on average of the total area of the reservoirs. The reservoirs of the Paranapanema River have adequate water quality standards for aquaculture, and there is no indication that this activity is currently causing significant impacts to the overall aquatic environment in each reservoir. Nevertheless, caution is required when selecting areas for new fish farms to avoid areas that are more susceptible to eutrophication.
format	article
author	RM Neto HR Nocko A Ostrensky
author_facet	RM Neto HR Nocko A Ostrensky
author_sort	RM Neto
title	Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
title_short	Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
title_full	Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
title_fullStr	Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
title_full_unstemmed	Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil
title_sort	environmental characterization and impacts of fish farming in the cascade reservoirs of the paranapanema river, brazil
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/59c6f5e2e5794c0fb1d7549bb051b015
work_keys_str_mv	AT rmneto environmentalcharacterizationandimpactsoffishfarminginthecascadereservoirsoftheparanapanemariverbrazil AT hrnocko environmentalcharacterizationandimpactsoffishfarminginthecascadereservoirsoftheparanapanemariverbrazil AT aostrensky environmentalcharacterizationandimpactsoffishfarminginthecascadereservoirsoftheparanapanemariverbrazil
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Environmental characterization and impacts of fish farming in the cascade reservoirs of the Paranapanema River, Brazil

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