Acta Limnologica Brasiliensia
Acta Limnologica Brasiliensia
Original Article

Intensive fish farming: changes in water quality and relationship with zooplankton community

Piscicultura intensiva: alterações na qualidade da água e a relação com a comunidade zooplanctônica

Tamiris Rosso Storck; Leticia Raquel Sippert; Débora Seben; Dinei Vitor Lazarotto; Júlia Helfenstein; Jheniffer dos Santos da Luz; Felipe Osmari Cerezer; Silvana Isabel Schneider; Arci Dirceu Wastowski; Barbara Clasen; Jaqueline Ineu Golombieski

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Aim: This study aimed to evaluate the interference of intensive fish farming in the physicochemical variables of water and in the zooplankton community from a tilapia (Oreochromis niloticus Linnaeus, 1758) pond in southern Brazil. In addition, it was verified whether the analyzed zooplankton groups could be bioindicators of changes in the quality of pond water.

Methods: The water and zooplankton sample collections were carried out monthly in different places of the pond: at the water supply site (affluent), in the middle of the pond and at the water outlet site (effluent). Analyzes related to nitrogen series (total nitrogen, total ammonia, nitrite + nitrate), dissolved oxygen, total hardness, total alkalinity, total phosphorus, pH, turbidity and water temperature were performed at all sampling sites. In addition, the density of the zooplankton groups Copepoda (adults and nauplii), Rotifera and Cladocera was determined.

Results: Regarding the changes between the quality variables of the affluent and effluent water of the pond, the outlet water showed a significant increase only in the variable total alkalinity. Rotifers were the most abundant organisms, and nauplii Copepoda showed a significant increase in the density of organisms in the middle of the pond compared to the inlet water. Both the redundancy analysis (RDA) and the Spearman correlation matrix revealed that zooplanktonic groups are associated with certain physicochemical variables of the water. According to the Analysis of Indicator Species (IndVal), the evaluated organisms are not related to bioindicator species in this environment.

Conclusions: Therefore, intensive production of O. niloticus caused changes only in the total alkalinity of the pond water. The zooplanktonic organisms correlated with the physicochemical variables of the water and between the groups, and did not show potential for bioindicators of water quality in the different locations of the pond.


effluent, environmental management, monitoring, Oreochromis niloticus, pollution


Objetivo: Este estudo teve como objetivo avaliar a interferência da piscicultura intensiva nas variáveis físico-químicas da água e na comunidade zooplanctônica de um viveiro de tilápias (Oreochromis niloticus Linnaeus, 1758) no sul do Brasil. Além disso, verificou-se se os grupos de zooplâncton analisados poderiam ser bioindicadores de alterações na qualidade da água do viveiro.

Métodos: As coletas de amostras de água e zooplâncton foram realizadas mensalmente em diferentes locais do viveiro: no local de abastecimento de água (afluente), no meio do viveiro e no local de saída de água (efluente). Foram realizadas análises relacionadas a série nitrogenada (nitrogênio total, amônia total, nitrito + nitrato), oxigênio dissolvido, dureza total, alcalinidade total, fósforo total, pH, turbidez e temperatura da água em todos os locais de amostragem. Além disso, foi determinada a densidade dos grupos de zooplânctons Copepoda (adultos e náuplios), Rotifera e Cladocera.

Resultados: Em relação às variações entre as variáveis de qualidade da água afluente e efluente do viveiro, a água de saída apresentou aumento significativo apenas na variável alcalinidade total. Os rotíferos foram os organismos mais abundantes, e os Copepoda náuplios apresentaram um aumento significativo na densidade de organismos no meio do viveiro em comparação com a água de entrada. Tanto a análise de redundância (RDA) quanto a matriz de correlação de Spearman revelaram que grupos zooplanctônicos estão associados a determinadas variáveis físico-químicas da água. De acordo com a Análise de Espécies Indicadoras (IndVal), os organismos avaliados não apresentam relação como espécies bioindicadoras deste ambiente.

Conclusões: A produção intensiva de O. niloticus causou alterações apenas na alcalinidade total da água do viveiro. Os organismos zooplanctônicos apresentaram correlação com as variáveis físico-químicas da água e entre os grupos, e não apresentaram potencial para bioindicadores da qualidade da água nos diferentes locais do viveiro.


efluente, gestão ambiental, monitoramento, Oreochromis niloticus, poluição


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