Income evaluation of small - scale fishers in two brazilian urban reservoirs: Represa Billings (SP) and Lago Paranoá (DF)

Brazilian Journal of Biology

M. Petrere Jr.²  T. Walter¹  C. V. Minte-vera¹ 

[1] ,UNESP Departamento de Ecologia Rio Claro SP ,Brazil

关键词: small-scale fisheries;    financial analysis;    Represa Billings;    Lago Paranoá;    Brazil;    pescarias de pequena escala;    análise financeira;    Represa Billings;    Lago Paranoá;    Brasil;   

DOI  :  10.1590/S1519-69842006000500007

来源: SciELO

【 摘 要 】

The income of small-scale fisheries of two urban reservoirs in Brazil: Represa Billings (127 km²) located in the metropolitan region of São Paulo, the capital city of the state of São Paulo and Lago Paranoá (38 km²) located in Brasília (DF), the capital city of Brazil were calculated and compared. Both fisheries are mainly based on the alien Nile tilapia Oreochromis niloticus (more than 80% of the total catch). Although these reservoirs are nearly 900 km apart, their native fish fauna belong to the Upper Paraná Province. The Represa Billings fishers have, on average, a daily profit of R$ 15.8 (U$ 8.4 mostly employing gill nets) and Lago Paranoá fishers R$ 46.6 (U$ 24.9, mostly employing cast nets), which is a statistically significant difference (P < 0.001). The profit of the fisheries is explained by the factor "reservoir" and covariate "days of fishing". Due to the increasing violence in the metropolitan region of São Paulo, the Represa Billings fishery is vanishing.

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