A bio-economic appraisal of pair trawl fisheries off southeastern Brazil
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Data
2001-01-01
Autores
Castro, Luiz Arnaud Britto de
Petrere Jr., Miguel [UNESP]
Comune, Antônio Evaldo
Título da Revista
ISSN da Revista
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Editor
Universidade de São Paulo (USP), Instituto Oceanográfico
Resumo
Numa primeira tentativa de introduzir modelos bio-econômicos no gerenciamento pesqueiro no sudeste e sul do Brasil realizou-se um estudo da pesca de parelhas. Para isso construiu-se um modelo utilizando os parâmetros biológicos disponíveis na literatura. Como não há registros históricos de dados econômicos da pesca, foram utilizados os valores atuais do pescado e dos diversos insumos utilizados nessa atividade. Os resultados indicam que a frota estava superdimensionada no período de 1976-1981. de fato, daquela época até 1996, essa frota reduziu-se de 28 parelhas para apenas 11, um número ainda excessivo. O superdimensionamento da frota reflete-se nos resultados econômicos da análise, na forma de retornos financeiros negativos. Entretanto, deve-se levar em conta que alguns dos custos fixos não representam efetivo desembolso por parte dos armadores, uma vez que muitos deles não têm seus barcos segurados, ao mesmo tempo que a maioria dos barcos já estão totalmente amortizados e não apresentam mais custos sobre o capital. Por outro lado, as rendas consideradas não incluem o valor da fauna acompanhante desembarcada.
A study of the pair trawl fisheries was made in an attempt to introduce bio-economic models into fishery management in southern and southeastern Brazil. The biological parameters of demersal fishes found in the literature were used to mount the bio-economic model. Since there are no historical data on the economics of the fishery industry, the present market values of fish and of the diverse items that compose the costs of the catch have been used. The results show that the fleet was oversized in the period 1976-1981. The number of boats was reduced from 28 pairs to only 11 in 1996, but was still considered too big. The size of the fleet is reflected in the economic results of the analysis which shows negative returns. However, the fact that some of the fixed costs are not actually spent by the owners of the boats, as many of them have no insurance and most of the boats are already completely paid off and do not accrue costs on the capital invested must all be taken into account. on the other hand, the income figures used in this analysis did not take into account the value of the by-catch landed.
A study of the pair trawl fisheries was made in an attempt to introduce bio-economic models into fishery management in southern and southeastern Brazil. The biological parameters of demersal fishes found in the literature were used to mount the bio-economic model. Since there are no historical data on the economics of the fishery industry, the present market values of fish and of the diverse items that compose the costs of the catch have been used. The results show that the fleet was oversized in the period 1976-1981. The number of boats was reduced from 28 pairs to only 11 in 1996, but was still considered too big. The size of the fleet is reflected in the economic results of the analysis which shows negative returns. However, the fact that some of the fixed costs are not actually spent by the owners of the boats, as many of them have no insurance and most of the boats are already completely paid off and do not accrue costs on the capital invested must all be taken into account. on the other hand, the income figures used in this analysis did not take into account the value of the by-catch landed.
Descrição
Palavras-chave
Modelos bio-econômicos, Arrasto de portas, Peixes demersais, Micropogonias furnieri, Macrodon ancylodon, Cynoscion jamaicensis, Brasil, Bio-economic models, Pair trawling, Demersal fishes, Micropogonias furnieri, Macrodon ancylodon, Cynoscion jamaicensis, Brazil
Como citar
Revista Brasileira de Oceanografia. Instituto Oceanográfico da Universidade de São Paulo, v. 49, n. 1-2, p. 39-48, 2001.