Survival due to vitelline reserve of a finned neonate of Carcharias taurus in southern of Brazil
Keywords:
commercial fishing, protected species, conservationAbstract
A neonate of Carcharias taurus with mutilated fins was caught during commercial fishing with monofilament nylon bottom gillnets on the continental shelf of southern Brazil. The individual, a 100-cm long male, had the lobes of the first dorsal and two pectoral fins, probably cut clean with a knife and the wounds were healing process. The specimen probably was captured by the first time as a neonate and survival may only have happened due to the yolk reserve it was born with. In southern Brazil, where it was recaptured, landings of C. taurus have been forbidden by law since 1998. This case highlights the need for measures to enforce the landing of shark carcasses with attached fins to avoid finning and restrain the illegal fishing of protected species.
References
Africa. IV. The families Odontaspididae,Scapanorhynchidae, Isuridae, Cetrhinidae,
Alopiidae, Orectolobidae and Rhiniodontidae.Investigational Report, Durban, 39: 1-103.
BIGELOW, H.B. and SCHROEDER, W.C. 1948 Sharks. Memoir Sears Foundation for Marine Research, New Haven USA, 1: 59-576.
CAMHI, M.; FOWLER, S.L.; MUSICK, J.A.;BRí"žUTIGAM, A.; FORDHAM, S.V. 1998
Sharks and their Relatives í Ecology and Conservation. IUCN/SSC Shark Specialist
Group. IUCN, Gland, Switzerland and Cambridge, UK. iv + 39 pp.
CHIARAMONTE, G.; DOMINGO, A.; SOTO, J.2007 Carcharias taurus (Southwest Atlantic Subpopulation). In: IUCN 2009. IUCN Red List of Threatened Species. Version 2009.1.
GALINA A.B. 2006 A distribuição espacial e a composição das capturas de elasmobrí¢nquios pela frota de emalhe de Passo de Torres í SC, na costa sul do Brasil, no verão de 2004/2005. Rio Grande, 66p. (Dissertação de Mestrado em Ocenografia Biológica, FURG).
GILMORE, R.G. 1993 Reproductive biology of lamnoid sharks. Environmental Biology of Fishes, Dordrecht, 38: 95-114.
GILMORE, R.G.; PUTZ, O.; DODRILL, J.W. 2005 Oophagy, intrauterine cannibalism and
reproductive strategy in Lamnoid sharks. In: HAMLETT, W.C. (Ed.) Reproductive biology of Chondrichthyes. Science Publishers, Inc.Enfield (NH), USA. p.435-462
IBAMA 1998 Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais
Renováveis. Portaria nº 121, de 24 de Agosto.Disponível em: http://ibama2.ibama.gov.br/cnia2/renima/cnia/lema/lema_texto/IBAMA/PT0121-240898.PDF. Acesso em: 15 out. 2010.
IBAMA/CEPERG 2009 Desembarque de pescado no Rio Grande do Sul: 2008. Instituto
Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis; Centro de Pesquisa e Gestão dos Recursos Pesqueiros Lagunares e Estuarinos; Projeto Estatística Pesqueira. Rio Grande. 45p.
MUSICK, J.A.; BURGES, G.; CAILLIET, G.;CAMHI, M.; FORDHAM, S. 2000.
Management of sharks and their relatives (Elasmobranchii). Fisheries, Bethesda USA,
25(3): 9-13.
ROSE, D. 1998 Shark fisheries and trade in the Americas, Volume 1: North America.
Washington: TRAFFIC North America. 143p.
SPRINGER, S. 1948 Oviphagous Embryos of the Sand Shark, Carcharias taurus. Copeia,Lawrence, 3: 153-157
SAíÂDI, B.; BRADA, M.N.; MAROUANI, S.;GUÉLORGET, O.; CAPAPÉ C. 2006 Atypical
characteristics of an albino embryo of Carcharhinus plumbeus (Chondrichthyes:
Carcharhinidae) from the Gulf of Gabí¨s (southern Tunisia, Mediterranean). Acta
Adriatica, Split, Croatia, 47(2): 167-174.
VIDELER, J.J. 1993 Fish swimming. New York:Chapman & Hall. 254p.
VILCOX, D.; DOVE, B.; MACDAVID, D.; GREER,D. 2002 Image Tool for Windows version 3.0. The University of Texas Health Science Center in San Antonio.
VOOREN, C.M.; NAVES, L.C.; ROMAY, A.F.L. 2003 Guia para a identificação de tubarões e raias em desembarques da pesca no Rio Grande do Sul. Documentos Técnicos de
Oceanografia, Rio Grande, 12: 1-54.
VOOREN, C.M.; KLIPPEL, S.; GALINA, A.B. 2005 Os elasmobrí¢nquios das águas costeiras da Plataforma Sul. In: VOOREN, C.M. and KLIPPEL, S. (Eds.) Ações para a conservação de tubarões e raias no sul do Brasil: Igaré. Porto Alegre, Cap. 7. p.113-120.
VOOREN, C.M. and KLIPPEL, S. 2005a Ações para a conservação de tubarões e raias na Plataforma Sul. In: VOOREN, C.M. and KLIPPEL, S. (Eds.) Ações para a conservação de tubarões e raias no sul do Brasil. Porto Alegre:Igaré. Cap. 14. p.229-246
VOOREN, C.M. and KLIPPEL, S. 2005b Diretrizes para a conservação de espécies ameaçadas de elasmobrí¢nquios. In: VOOREN, C.M. and KLIPPEL, S. (Eds.) Ações para a conservação de tubarões e raias no sul do Brasil. Igaré: Porto Alegre. Cap. 13. p.213-228.