Distribution and relative abundance of the blue shark, Prionace glauca, in the South Brazil
Keywords:
CPUE, South Atlantic Ocean, water massesAbstract
A total of 233 blue sharks Prionace glauca (Linnaeus, 1758) were caught by pelagic longline between 1996 and 1999 at different seasons. The study area was the continental slope of the southwestern Atlantic Ocean and adjacent oceanic waters, between 27oS and 35oS, at fishing depths between 25 and 200 m. According to CPUE (number of individuals/1,000 hooks), P. glauca was abundant in November (24.0%) and July (37.5); showed low abundance during March/April (9.2) and was scarce in August (2.2) and December (1.38). The highest concentrations were observed in South Atlantic Central Water (SACW). The scarcity of P. glauca was related to the presence of Subantartic Waters and thermic inversions between surface and the profundity of 100 m approximately.
References
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PRATT, H. L., JR. 1979 Reproduction in the blue shark, Prionace glauca. Fish. Bull., 77 (2): 445-470.
SOKAL, R. R. e ROHLF, J. F. 1969 Biometry. W.H.Freeman and Company, USA.
STEVENS, J.D. 1976 First results of shark tagging in the north-east Atlantic. Journal of the Marine Biological Association of the United Kingdom, 56:929-937.
STEVENS, J. D., BONFIL, R., DULVY, N. K.; WALKER,P. A. 2000 The effects of fishing on sharks, rays, and chimaeras (chondricthyans), and the applications for marine ecosystems. J. Mar. Sci.,57: 476-494.
STRASBURG, D. W. 1958 Distribution, abundance, and habits of pelagic sharks in the Central Pacific Ocean. Fish. Bull., 58: 335-361.
AMORIM, A. F., ARFELLI, C. A.; FAGUNDES, L., 1998 Pelagic elasmobranchs caught by longliners off southern Brazil during 1974-97: an overview. Mar. Freshwater Res., 49: 621-632.
BIGELOW, K. A., BOGGS, C. H.; HE, X., 1999 Environmental effects on swordfish and blue shark catch rates in the US North Pacific longline fishery.Fish. Oceanogr., 8 (3): 178-198.
CAREY, F. G. e SCHAROLD, J. V. 1990 Movements of blue sharks (Prionace glauca) in depht and course.Mar. Biol., 106: 329-342.
CASTRO, J. A. e MEJUTO, J. 1995 Reproductive Reproductive parameters of blue shark, and others sharks in the Gulf of guinea. Mar. Fresh. Res. 46: 967-973.
COMPAGNO, L. G. V. 1984 FAO species catalogue,volume 4. Sharks of the world. An annoted and illustrated catalogue of sharks species known to date. Part 2. Carcharhiniformes. FAO Fish. Synop.,125: 252-655.
GROTENBREG, L. e VOOREN, C. M. 1999 Projeto ARGO, Relatório final, volume 2. Avaliação dos Recursos Pesqueiros dos Peixes Pelágicos de Grande Porte, parte 3. Age and growth of the Age and growth of the blue shark, Prionace glauca, from southern Brazil. Fundação Universidade do Rio Grande, Rio Grande, RS.
GUBANOV, Y. P. e GRIGOR’YEV, V. N. 1975 Observations of the distribution and biology of the blue shark Prionace glauca (Carcharhinidae) of the Indian Ocean. J. Ichthyol., 15: 37-43.
GUEDES, V. 1999 A pesca de espinhel de superfície ("longlineâ€Â) na região sudeste-sul do Brasil. Programa Revizee / Score Sul, Avaliação das Capturas de Elasmobrí¢nquios, CEPSUL/IBAMA, Itajaí, SC. 183p. (Relatório anual técnico- científico).
HARVEY, J. M. 1989 Food habitats, seasonal,abundance, size, and Sex of the blue shark, Prionace glauca, in Monterrey Bay, California. Calif. Fish and Game, 75 (1): 33-44.
HAZIN, F. H. V., COUO, A. C., KIHARA, K., OTSURA,K.; ISHINO, M. 1990 Distribution and abundance of pelagics sharks in the southwestern equatorial Atlantic. J. Tokyo Univ. Fish., 77 (1): 51-64.
HAZIN, F. H. V., BOEKMAN, C. E., LEAL, E. C.,LESSA, R. P. T., KIHARA, K. ; OTSUKA, K.
1994 Distribution and relative abundance of the blue shark, Prionace glauca, in the southwestern equatorial Atlantic Ocean. Fish. Bull., 92: 474-480.
HUBOLD, G. 1980a Hydrography and plancton off southern Brazil and Rio de la Plata, AugustNovember 1977. Atlí¢ntica, 4: 1-22.
HUBOLD, G. 1980b Second report on hydrography and plancton off southern Brazil and Rio de la Plata, Autumn Cruise: April-June 1978. Atlí¢ntica,4: 23-42.
LEGAT, J.F. e VOOREN, C.M. 2004 Reproductive cicle and migration of the blue shark (Prionace glauca) in South Atlantic Ocean. In: VI International Congress on the biology of fish, 2004, Manaus. P 25-35.
Mí–LLER, O. O., ZAVIALOV, P., LEON, S. P. DE;FREITAS, A. C. 1999 Projeto ARGO, Relatório final, volume 10. Mapeamneto hidrográfico das águas oceí¢nicas da ZEE-Sul. Fundação Universidade do Rio Grande, Rio Grande, RS.
NAKANO, H., MAKIHARA, M.; SHIMAZAKI, K., 1985 Distribution and biological characteristics of the blue shark in the central North Pacific. Bulletin of the Faculty of Fisheries, Hokkaido University, 36(3): 99-113.
ODEBRECHT, C. e CASTELLO, J. P. 2001 The convergence ecosystem in the southwest Atlantic. In: U. Seeliger & B. Kjerfve (eds.), Ecological Studies. Coastal Marine Ecosystem of Latin America, vol. 144.Springer- Verlag Berlin Heidelberg.
PIOLA, A. R., CAMPOS, E. J. D., Mí–LLER, O. O. JR., CHARO, M; MARTINEZ, C. 2000 The
subtropical shelf front off eastern South America.J. Geophys. Res., 105 (C3): 6565-6578.
PRATT, H. L., JR. 1979 Reproduction in the blue shark, Prionace glauca. Fish. Bull., 77 (2): 445-470.
SOKAL, R. R. e ROHLF, J. F. 1969 Biometry. W.H.Freeman and Company, USA.
STEVENS, J.D. 1976 First results of shark tagging in the north-east Atlantic. Journal of the Marine Biological Association of the United Kingdom, 56:929-937.
STEVENS, J. D., BONFIL, R., DULVY, N. K.; WALKER,P. A. 2000 The effects of fishing on sharks, rays, and chimaeras (chondricthyans), and the applications for marine ecosystems. J. Mar. Sci.,57: 476-494.
STRASBURG, D. W. 1958 Distribution, abundance, and habits of pelagic sharks in the Central Pacific Ocean. Fish. Bull., 58: 335-361.
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2018-11-03
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