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Ecology and ethnoecology of dusky grouper [garoupa, Epinephelus marginatus (Lowe, 1834)] along the coast of Brazil.

Begossi A, Silvano RA - J Ethnobiol Ethnomed (2008)

Bottom Line: Much of the information found in the literature concerns Mediterranean dusky groupers.We conclude that precautionary approaches and 'data-less' management approaches are needed in the coast of Brazil.Research on this species and on the potential of aquaculture for its cultivation, are urgent, due to the apparent vulnerability and decrease of dusky grouper along the coast of Brazil.

View Article: PubMed Central - HTML - PubMed

Affiliation: Fisheries & Food Institute, Rua Coronel Quirino 1636, Campinas, S.P. 13025-002, Brazil. alpinab@uol.com.br

ABSTRACT
Dusky grouper (garoupa, Epinephelus marginatus) is an important catch for several artisanal small-scale fisheries along the Brazilian coast. It is a sedentary, monandric, and late maturing protogynous species, which makes it vulnerable to overharvesting even though it is mainly caught through hook and line or spear fishing through free diving. Lack of information on the ecology and biology of this species in Brazil is astonishing. Much of the information found in the literature concerns Mediterranean dusky groupers. Studies compiling local knowledge (ethnoecology) about fish species complement biological data, and have been fundamental for effective fisheries management. In this study, our objectives are to obtain data about dusky grouper through fish catches and analysis of stomach contents and gonad maturation (macroscopic analyses), along with interviews from fishermen from six small-scales communities from the southern (Pântano do Sul, Florianópolis, Santa Catarina State) to the northern Brazilian coast (Porto Sauípe, Bahia State). We conclude that precautionary approaches and 'data-less' management approaches are needed in the coast of Brazil. Research on this species and on the potential of aquaculture for its cultivation, are urgent, due to the apparent vulnerability and decrease of dusky grouper along the coast of Brazil.

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Map showing study areas in the coast of Brazil.
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Figure 1: Map showing study areas in the coast of Brazil.

Mentions: The methods employed in this study included collecting specimens of dusk grouper, marking fishing spots, and conducting two sets of interviews with local fishermen. Interviews were conducted in two different steps, from 2004 to 2006. The collection of specimens occurred in 2006–2007 from two landing points: Bertioga (São Paulo) and Copacabana beach ('Colônia de Pescadores do Posto 6', Rio de Janeiro, Figure 1). Dusky grouper was collected at landing points by buying the recently caught fish, which had been separated to be sold in the small local markets (Table 1). Such fish had their stomach contents analyzed and the presence/absence of mature gonads was observed. Such methods have been applied in other studies on marine fish species in Brazil [24]. Fish and crab identifications were performed by one of the authors (AB), and by L. S. Souza and L. E. C. Oliveira, and revised by R. Caires, and G. S. de Melo, respectively, from the Museum of Zoology, University of São Paulo; they were based on keys for Brazilian fishes and crabs [7,25].


Ecology and ethnoecology of dusky grouper [garoupa, Epinephelus marginatus (Lowe, 1834)] along the coast of Brazil.

Begossi A, Silvano RA - J Ethnobiol Ethnomed (2008)

Map showing study areas in the coast of Brazil.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2567293&req=5

Figure 1: Map showing study areas in the coast of Brazil.
Mentions: The methods employed in this study included collecting specimens of dusk grouper, marking fishing spots, and conducting two sets of interviews with local fishermen. Interviews were conducted in two different steps, from 2004 to 2006. The collection of specimens occurred in 2006–2007 from two landing points: Bertioga (São Paulo) and Copacabana beach ('Colônia de Pescadores do Posto 6', Rio de Janeiro, Figure 1). Dusky grouper was collected at landing points by buying the recently caught fish, which had been separated to be sold in the small local markets (Table 1). Such fish had their stomach contents analyzed and the presence/absence of mature gonads was observed. Such methods have been applied in other studies on marine fish species in Brazil [24]. Fish and crab identifications were performed by one of the authors (AB), and by L. S. Souza and L. E. C. Oliveira, and revised by R. Caires, and G. S. de Melo, respectively, from the Museum of Zoology, University of São Paulo; they were based on keys for Brazilian fishes and crabs [7,25].

Bottom Line: Much of the information found in the literature concerns Mediterranean dusky groupers.We conclude that precautionary approaches and 'data-less' management approaches are needed in the coast of Brazil.Research on this species and on the potential of aquaculture for its cultivation, are urgent, due to the apparent vulnerability and decrease of dusky grouper along the coast of Brazil.

View Article: PubMed Central - HTML - PubMed

Affiliation: Fisheries & Food Institute, Rua Coronel Quirino 1636, Campinas, S.P. 13025-002, Brazil. alpinab@uol.com.br

ABSTRACT
Dusky grouper (garoupa, Epinephelus marginatus) is an important catch for several artisanal small-scale fisheries along the Brazilian coast. It is a sedentary, monandric, and late maturing protogynous species, which makes it vulnerable to overharvesting even though it is mainly caught through hook and line or spear fishing through free diving. Lack of information on the ecology and biology of this species in Brazil is astonishing. Much of the information found in the literature concerns Mediterranean dusky groupers. Studies compiling local knowledge (ethnoecology) about fish species complement biological data, and have been fundamental for effective fisheries management. In this study, our objectives are to obtain data about dusky grouper through fish catches and analysis of stomach contents and gonad maturation (macroscopic analyses), along with interviews from fishermen from six small-scales communities from the southern (Pântano do Sul, Florianópolis, Santa Catarina State) to the northern Brazilian coast (Porto Sauípe, Bahia State). We conclude that precautionary approaches and 'data-less' management approaches are needed in the coast of Brazil. Research on this species and on the potential of aquaculture for its cultivation, are urgent, due to the apparent vulnerability and decrease of dusky grouper along the coast of Brazil.

Show MeSH
Related in: MedlinePlus