Caracterização da piscicultura na região do Vale do Ribeira - SP

Castellani, Daniela; Barrella, Walter

doi:10.1590/s1413-70542005000100021

Cited by 20 publications

(12 citation statements)

References 3 publications

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“…Therefore, the individuals collected could have escaped at very small length or it can indicating the possibility that the species has developed and reproduced, generating fertile descendants. CASTELLANI and BARRELLA (2005) characterized the fish farming in the Ribeira Valley region, the same study area of this work. They found that in 95% of farms occurred escape of exotic species, which Nile tilapia is the most frequent.…”

Section: Resultsmentioning

confidence: 99%

Registro da tilápia-do-nilo no Rio Mandira, Cananéia, Estado de São Paulo

2017

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The present short communication reports the occurrence of Nile Tilapia (Oreochromis niloticus) in the Mandira River, in the extractive reserve in the Cananéia estuary, São Paulo State. In May 2014, using dip nets, we collected five specimens of O. niloticus in the estuary, with length ranging from 1.4 to 2.5 cm and weight between 0.8 and 2.3 g. Samplings performed in July indicated the presence of additional four specimens of O. niloticus in other stretches of the same river. The occurrence of alien species in conservation areas has high ecological importance, as they can cause environmental and biodiversity alterations; in Brazil, the introduction of alien species is usually related to economic activities, such as the Nile tilapia aquaculture.

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Section: Resultsmentioning

confidence: 99%

Registro da tilápia-do-nilo no Rio Mandira, Cananéia, Estado de São Paulo

2017

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“…Com o potencial desenvolvimento da aqüicultura no Estado, é necessário se preocupar primeiramente com a questão ambiental, principalmente por se tratar de empreendimentos que interagem diretamente com o meio ambiente estando localizados muito próximos aos corpos d´água e nascentes, inclusive próximos a áreas de proteção e o uso não controlado desse corpo d´água, assim como o efluente não tratado do tanque/viveiro, podem causar impacto negativo nos recursos hídricos (Castellani & Barrella, 2005). Um déficit na qualidade de água que pode ser causado por maus criadores que não se preocupam em manter intactas as fontes de água a jusante de seus empreendimentos pode vir a causar um prejuízo ambiental muito grande, impossibilitando o estabelecimento de vários organismos essenciais à cadeia alimentar, seja pelo alto grau de eutrofização do ambiente ou pela introdução de espécies exóticas.…”

Section: Resultsunclassified

A criação de tilápia no estado do Amapá como fonte de risco ambiental

Gama¹

2008

Acta Amaz.

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RESUMOO Estado do amapá, apesar de apresentar condições favoráveis ao crescimento da piscicultura, ainda apresenta pouco desenvolvimento desta atividade. a criação de peixes no Estado vem atraindo a atenção de muitos pequenos empreendedores que conseguem financiamento para tal, no entanto, seu investimento é concentrado na criação da Tilápia. Trata-se de uma espécie exótica, cujo processo de criação já foi amplamente estudado, mas que oferece risco de sua introdução no ambiente caso seja criada sem planejamento, como acontece no amapá. a grande concentração de empreendimentos com criação de Tilápia no Estado se encontra em áreas ambientalmente frágeis, podendo causar danos ambientais em caso de soltura ou escape, que normalmente acontece. Como não existem estudos na região sobre o potencial dano ambiental causado por esses peixes, preventivamente deve-se evitar esse tipo de criação, uma vez que existem outras espécies possíveis de serem criadas que são nativas do ambiente, como o Tambaqui.PalavRaS-chavE: Tilápia, amapá, Espécie exótica, The tilápia creation in the Amapá state as source of environmental risk aBSTRacTThe state of amapá presents great conditions for aquaculture growth, but continues to present little development of this activity. The creation of fish in the State is attracting the attention of many small entrepreneurs who concentrate in creating Tilápia, an exotic species, whose process of creation has been widely studied. However, there is the risk of introducing it into the environment, if created without planning, as happens in amapá. The heavy concentration of enterprises creating Tilápia in the State is located in fragile areas, which can cause environmental damages if it is let loose or escapes, which normally happens. as there are no studies in the region on the potential environmental damage caused by these fish, this type of creation must be prevented, since other possible species native to the environment, such as the Tambaqui, can be bred.

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“…Although the owners have said in the interviews that they are worried about fish escaping, 33% of them said they didn´t have any kind of physical screens or barriers in the effluents of their fee-fishing ponds. As the predominant species in the studied fishing grounds are not native, their escapes from fee-fishing ponds directly in the tributaries of the reservoir is a potential risk to the balance of the native aquatic fauna, showing the importance of fishing grounds as potential sources for dispersion of allochthonous species (Fernandes et al, 2003;Castellani and Barrella, 2005).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of water quality in fee-fishing ponds located in Guarapiranga’s sub basin, Upper Tietê River basin, São Paulo State

et al. 2020

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Abstract This study intended to characterize the fee-fishing ponds located in Guarapiranga's sub-basin both in terms of structure and environmental conditions. The studied region was mapped and 15 out of 24 georeferenced fee-fishing ponds had their owners interviewed through semi-structured questionnaires. In addition to that, samples were collected from the seven fee-fishing ponds closest to the reservoir throughout a seasonal cycle divided in four sample collections carried out between November 2013 and August 2014, aiming at measuring the following variables in situ: water flow rates, pH, turbidity, electrical conductivity and dissolved oxygen concentration in affluents and effluents. Other samples were taken in order to assess total phosphorus (TP) and total nitrogen (TN) concentrations. Our results show a decrease in dissolved oxygen concentration along with an increase in TP and TN concentration in effluents, as compared to affluents. TP e TN concentrations exceeded the permitted values established by CONAMA 357/2005 – Class II resolution in all effluents at least during part of the year. High nutrient levels were observed in affluents, condition with which basins that have been affected by population growth are commonly met. It was verified, by interviewing the owners regarding venture management and by analyzing the collected samples, that there is significant correlation between the daily feeding and the TP and TN levels (p=0.021 and p=0.045, respectively), with the ponds where feeding is more intense having showed the highest nutrient levels in their effluents. The results highlight the importance of mitigation measures such as educating the owners on proper water management, the installation of pond aerators in conjunction with tanks the filters of which shall be composed of aquatic macrophytes in their effluents, as well as awareness campaigns aiming to reduce the usage of dough by fishermen in order to minimize detrimental impacts on Guarapiranga’s sub-basin.

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Caracterização da piscicultura na região do Vale do Ribeira - SP

Cited by 20 publications

References 3 publications

Registro da tilápia-do-nilo no Rio Mandira, Cananéia, Estado de São Paulo

Registro da tilápia-do-nilo no Rio Mandira, Cananéia, Estado de São Paulo

A criação de tilápia no estado do Amapá como fonte de risco ambiental

Evaluation of water quality in fee-fishing ponds located in Guarapiranga’s sub basin, Upper Tietê River basin, São Paulo State

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