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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.15 no.3 Curitiba  1998

http://dx.doi.org/10.1590/S0101-81751998000300016 

Dolphin interactions with the mullet artisanal fishing on Southern Brazil: a qualitative and quantitative approach

 

 

Paulo C. Simões-LopesI; Marta E. FabiánII; João O. MeneghetiII

IDepartamento de Ecologia e Zoologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina. Caixa Postal 5102, 88040-970 Florianópolis, Santa Catarina, Brazil
IIDepartamento de Zoologia, Universidade Federal do Rio Grande do Sul. 90046-900 Porto Alegre, Rio Grande do Sul, Brazil

 

 


ABSTRACT

A detailed analysis of the interactions between Tursiops truncatus (Montagu, 1821) and the artisanal fishing of mullets (Mugil spp.) is presented at two localities in the south of Brazil: Laguna (Santa Catarina) and Inibé/Tramandaí (Rio Grande do Sul). Its behavioral strategies and the advantages of their association are re-described and quantified based on the success of the capture and on the selectivity of the prey sizes. The mullets are the main resource involved (92% to 75%) both at numerical level and as biomass. Twenty individuals of Tursiops truncatus participated in the interactions in Laguna and 9 in Imbé/Tramandaí. The participation and learning of calves is also reported.

Key words: Cetacea, Delphinidae, Tursiops truncatus, ecology, behavior, artisanal fishery.


 

 

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

 

 

ACKNOWLEDGEMENTS. We are grateful to Giselle de S. Paula, Jaqueline de Araujo, Karla Z. Scherer and M.C. Both for his invaluable assistance at the field. Drs. B. Würsig, L. von Fersen, N.B. Barros, K. Pryor, L.M. Herman, A.M. de Araujo, C.O. Diefenbach, M. Marmontel, and F.X. Pelletier kindly helped us with literature. The support of Barddal Fundation and of FAPERGS grant is greatly appreciated. We are indebted the fishermen of Laguna and Imbé who have contributed with many information and with your patience.

 

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Recebido em 05.VI.1997; aceito em 03.VIII.1998.

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