Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-28T15:02:47.108Z Has data issue: false hasContentIssue false
  • English
  • Français

Catch rates and size composition of blue sharks (Prionace glauca) caught by the Brazilian pelagic longline fleet in the southwestern Atlantic Ocean

Published online by Cambridge University Press:  04 February 2011

Felipe C. Carvalho ,
Debra J. Murie ,
Fábio H.V. Hazin ,
Humberto G. Hazin ,
Bruno Leite-Mourato ,
Paulo Travassos  and
George H. Burgess
Felipe C. Carvalho*
Affiliation:
Program of Fisheries and Aquatic Sciences, School of Forest Resources and Conservation, University of Florida, 7922 NW 71st, Gainesville, FL 32653, USA Florida Program for Shark Research, Florida Museum of Natural History, University of Florida, 280 Dickinson Hall, Gainesville, FL 32611, USA
Debra J. Murie
Affiliation:
Florida Program for Shark Research, Florida Museum of Natural History, University of Florida, 280 Dickinson Hall, Gainesville, FL 32611, USA
Fábio H.V. Hazin
Affiliation:
Departamento de Pesca e Aqüicultura, Universidade Federal Rural de Pernambuco (DEPAq-UFRPE), R. Dom Manoel de Medeiros s/n, Dois Irmãos 52171-900, Recife, PE, Brasil
Humberto G. Hazin
Affiliation:
Departamento de Pesca e Aqüicultura, Universidade Federal Rural de Pernambuco (DEPAq-UFRPE), R. Dom Manoel de Medeiros s/n, Dois Irmãos 52171-900, Recife, PE, Brasil
Bruno Leite-Mourato
Affiliation:
Departamento de Pesca e Aqüicultura, Universidade Federal Rural de Pernambuco (DEPAq-UFRPE), R. Dom Manoel de Medeiros s/n, Dois Irmãos 52171-900, Recife, PE, Brasil Departamento de Oceanografia, Universidade Federal de Pernambuco (UFPE), Cidade Universitária, 50670-901, Recife, PE, Brasil
Paulo Travassos
Affiliation:
Departamento de Pesca e Aqüicultura, Universidade Federal Rural de Pernambuco (DEPAq-UFRPE), R. Dom Manoel de Medeiros s/n, Dois Irmãos 52171-900, Recife, PE, Brasil
George H. Burgess
Affiliation:
Florida Program for Shark Research, Florida Museum of Natural History, University of Florida, 280 Dickinson Hall, Gainesville, FL 32611, USA
*
a Corresponding auteur: fcorreia@ufl.edu
Get access

Abstract

Distribution and relative abundance of blue sharks (Prionace glauca) in the southwestern Atlantic Ocean was modeled based on catch-per-unit-effort (CPUE) per 1000 hooks and length frequencies of blue sharks caught by the Brazilian pelagic tuna longline fleet. As a measure of relative abundance, CPUE of blue sharks caught in 58 238 fishing sets by the Brazilian pelagic tuna longline fleet (national and chartered), from 1978 to 2009, was standardized by a Generalized Linear Model (GLM) using three different approaches: i) a negative binomial error structure (log link); ii) the traditional delta lognormal model; and iii) the Tweedie distribution, recently proposed to adjust models with a high proportion of zeros. A cluster analysis using the K-means method was used to identify target species and incorporate it as a factor into the GLM. Cluster analysis grouped the data into six different fishing clusters according to the percentage of target species. Target factor (cluster) was the most important factor explaining the variance in all three CPUE models. The Tweedie model showed a relatively better fit compared to the other models. Blue shark nominal and standardized CPUE showed a relatively stable trend from 1978 to 1995. From 1995 onwards, however, there was an increasing trend in the standardized CPUE, up to a maximum value in 2008. In general, nominal CPUE and standardized CPUE tracked well up until 2000, after which standardized CPUE’s values were at a noticeably lower level than nominal CPUE. Length frequency data were analyzed for 11 932 blue sharks measured as part of the Brazilian onboard observer program operating on the pelagic tuna longline fleet between 2006 and 2008, with sizes ranging from 91 to 224 cm fork length. Overall, blue shark size data showed clear spatial and seasonal distributions for males and females in the southwestern Atlantic Ocean, with juveniles predominantly concentrated in the most southerly latitudes.

Keywords

Pelagic sharkFishing strategyCPUE standardization, and spatial distribution
Type
Research Article
Information
Aquatic Living Resources , Volume 23 , Issue 4 , October 2010 , pp. 373 - 385
Copyright
© EDP Sciences, IFREMER, IRD 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Références

Aires-da-Silva, A.M., Gallucci, V.F., 2007, Demographic and risk analyses applied to management and conservation of the blue shark (Prionace glauca) in the North Atlantic Ocean. Mar. Freshw. Res. 58, 570–580. CrossRefGoogle Scholar
Alemany, F., Álvarez, F., 2003, Determination of effective fishing effort on hake, Merluccius merluccius, in Mediterranean trawl fishery. Sci. Mar. 67, 491–499. CrossRefGoogle Scholar
Amorim A.F., 1992, Estudo da biologia, pesca e reprodução do cação azul, Prionace glauca L. 1758, capturado no sudeste e sul do Brasil. Ph.D. Dissertation, Universidade Estadual Paulista, Rio Claro, São Paulo.
Anonymous, 2008, Report of the 2008 inter-sectional meeting of the ICCAT shark species group: shark stock assessment. ICCAT Col. Vol. Sci. Pap. 17.
Anonymous, 2009, Report of the 2009 inter-sectional meeting of the ICCAT working group on stock assessment methods. International Commission for the Conservation of Atlantic Tunas. ICCAT Col. Vol. Sci. Pap.
Aragão, J.A.N., Menezes de Lima, J. H., 1985, Análise comparativa entre a atuação das frotas atuneiras arrendadas na costa brasileira. IBAMA. Ser. Doc. Téc. 35, 185–293. Google Scholar
Arfelli C.A., 1996, Estudo da pesca e aspectos da dinâmica populacional de espadarte Xiphias gladius L. 1758 no Atlântico sul. Ph.D. Thesis, Universidade Estadual Paulista, Rio Claro, São Paulo.
Azevedo V.G., 2003, Aspectos biológicos e dinâmica das capturas do tubarão-azul (Prionace glauca) realizadas pela frota espinheleira de Itajaí-SC, Brasil. M.Sc Thesis, Universidade de São Paulo.
Baum, J.K., Blanchard, W., 2010, Inferring shark population trends from generalized linear mixed models of pelagic longline catch and effort data. Fish. Res. 102, 229–239. CrossRefGoogle Scholar
Barry, S.C., Welsh, A.H., 2002, Generalized additive modeling and zero inflated count data. Ecol. Model. 157, 179–188. CrossRefGoogle Scholar
Barker, M.J., Schleussel, G., 2005, Managing global shark fisheries: suggestions for prioritizing management strategies. Aquat. Conserv. Mar. Freshw. Ecosyst. 15, 325–347. CrossRefGoogle Scholar
Begg, G.A., Friedland, K.D., Pearce, J.B., 1999, Stock identification and its role in stock assessment and fisheries management: an overview. Fish. Res. 43, 1–8. CrossRefGoogle Scholar
Bigelow, A.K., Boggs, C.H., He, X., 1999, Environmental effects on swordfish and blue sharks catch rates in the US. North Pacific longline fishery. Fish. Oceanogr. 8, 178–198. CrossRefGoogle Scholar
Buencuerpo, V., Ríos, S., Morón, J., 1998, Pelagic sharks associated with the swordfish, Xiphias gladius, fishery in the eastern North Atlantic Ocean and the Strait of Gibraltar. Fish. Bull. 96, 667–685. Google Scholar
Campana, S.E., Marks, L., Joyce, W., Kohler, N.E., 2006, Effects of recreational and commercial fishing on the blue sharks (Prionace glauca) in Atlantic Canada, with inferences on the North Atlantic population. Can. J. Fish. Aquat. Sci. 63, 670–682. CrossRefGoogle Scholar
Carvalho, F., Hazin, F., Hazin, H, Travassos, P., 2008, Historical catch rates of blue sharks in the southwestern Atlantic Ocean between 1958–1962. ICCAT Col. Vol. Sci. Pap. 62, 1553–1559. Google Scholar
Castro, J.A., Mejuto, J., 1995, Reproductive parameters of blue shark, Prionace glauca, and other sharks in the Gulf of Guinea. Mar. Freshw. Res. 46, 967–973. CrossRefGoogle Scholar
Chambers J.M., Hastie T.J., 1993, Statistical models in S. Chapman & Hall, New York, London.
Ciotti, A.M., Odebrecht, C., Fillmann, G., Moller, O.O., 1995, Fresh-water outflow and subtropical convergence influence on phytoplankton biomass on the southern Brazilian continental-shelf. Cont. Shelf Res. 15, 1737–1756 . CrossRefGoogle Scholar
Coelho, R., Bentes, L., Gonçalves, J.M.S., Lino, P., Ribeiro, J., Erzini, K., 2003, Reduction of elasmobranch by-catch in the hake semipelagic near-bottom longline fishery in the Algarve, Southern Portugal. Fish. Sci. 69, 293–299. CrossRefGoogle Scholar
Compagno L.J.V., 1999, Checklist of living elasmobranches, in sharks, skates and rays. In: Hamlett W.C. (ed.), Johns Hopkins University Press, Baltimore, pp. 471–498.
Damalas, D., Megalofonou, P., Apostolopoulou, M., 2007, Environmental, spatial, temporal and operational effects on swordfish (Xiphias gladius) catch rates of eastern Mediterranean Sea longline fisheries. Fish. Res. 84, 233–246. CrossRefGoogle Scholar
Garcia C.A.E., 1997, Coastal and marine environments and their biota. physical oceanography. In: Seeliger U., Odebrecht C., Castello J. P.(eds.) Subtropical convergence environments: the coast and sea in the southwestern Atlantic. Springer Verlag, Berlin, pp. 129–136.
Gubanov Y.P, Grigor’yev V.N., 1975, Observations on the distribution and biology of the blue shark Prionace glauca (Carcharhinidae) of the Indian Ocean. J. Ichthyol. 15, 37–43.
Gulland J.A., 1983, Fish stock assessment: a manual of basic methods. John Wiley & Sons, Chichester.
Hazin F.H.V., 1993, Fisheries oceanographical study of tunas, billfishes and sharks in the southwestern equatorial Atlantic Ocean. PhD Dissertation, University of Fisheries, Tokyo.
Hazin, F.H.V., Couto, A.A., Kihara, K., Otsuka, K., Ishino, M., 1990, Distribution and abundance of pelagic sharks in the southwestern equatorial Atlantic. J. Tokyo Univ. Fish. 77, 51–64. Google Scholar
Hazin, F.H.V., Boeckmann, C.E., Leal, E.C., Lessa, R.P.T., Kihara, K., Otsuka, K., 1994a, Distribution and relative abundance of the blue shark, Prionace glauca, in the southwestern equatorial Atlantic Ocean. Fish. Bull. 92, 474–480. Google Scholar
Hazin, F.H.V., Lessa, R.P.T., Chammas, M., 1994b, First observations on stomach contents of the blue shark, Prionace glauca, from southwestern equatorial Atlantic Ocean. Anais da Academia Brasileira de Ciências, Acad. Brasil. Ciênc. 542, 195–198. Google Scholar
Hazin, F.H.V., Zagaglia, J.R., Broadhurst, M.K., Travassos, P.E.P., Bezerra, T.R.Q., 1998, Review of a small-scale pelagic longline fishery off northeastern Brazil. Mar. Fish. Rev. 60, 1–8. Google Scholar
Hazin, F.H.V., Pinheiro, P.B., Broadhurst, M.K., 2000a, Further notes on reproduction of the blue shark, Prionace glauca, and a postulated migratory pattern in the South Atlantic Ocean. Ciência e Cultura 52, 114–120. Google Scholar
Hazin, H.V.F., Broadhurst, M.K., Hazin, H.G., 2000b, Preliminary analysis of the feasibility of transferring new longline technology to small artisanal vessels off northeastern Brazil. Mar. Fish. Rev. 62, 27–34. Google Scholar
Hazin H.G., 2006, Influência das variáveis oceanográficas na dinâmica populacional e pesca do espadarte, Xiphias gladius Linnaeus 1758, no oceano Atlântico oeste. PhD Dissertation. Universidade do Algarve.
He, X., Bigelow, K.A., Boggs, C.H., 1997, Cluster analysis of longline sets and fishing strategies within the Hawaii-based fishery. Fish. Res. 31, 147–158. CrossRefGoogle Scholar
Henderson, A.C., Flannery, K., Dunne, J., 2001, Observations on the biology and ecology of the blue shark in the North-east Atlantic. J. Fish Biol. 58, 1347–1358. CrossRefGoogle Scholar
Hogarth, D.D., Abeyasekera, S., Artjur, R.I., Beddington, J.R., Burn, R.W., Halls, A.S., Kirkwood, G.P., McAllister, M., Medley, P., Meeds, C.C., Parkes, G.B., Pilling, G.M., Wakeford, R.C., Welcomme, R.L., 2006, Stock assessment for fishery management-A framework guide to the stock assessment tools of the fisheries management science programme (FMSP). FAO Fish. Tech. Pap. 487, 47–49. Google Scholar
Johnson R., Wichern K., 1988, Applied multivariate statistical analysis. 2nd ed. Prentice Hall, New York.
Legat J.F.A., 2001, Distribuição, abundância, reprodução e morfometria de Prionace glauca no sul do Brasil. Master’s Thesis. Universidade Federal do Rio Grande.
Lewy, P., Vinther, M., 1994, Identification of Danish North Sea trawl fisheries. ICES J. Mar. Sci. 51, 263–272. CrossRefGoogle Scholar
Maunder, M.N., Punt, M.E., 2004, Standardizing catch and effort data: a review of recent approaches. Fish. Res. 70, 141–159. CrossRefGoogle Scholar
Mayer, D.A., Molinari, R.L., Festa, F.G., 1998, The mean and annual cycle of upper layer temperature fields in relation to Sverdrup dynamics within the gyres of the Atlantic Ocean. J. Geophys. Res. 103, 545–566. CrossRefGoogle Scholar
Megalofonou, P., Damalas, D., Yannopoulos, C., 2005, Composition and abundance of pelagic shark by-catch in the eastern Mediterranean Sea. Cybium 29, 135–140. Google Scholar
Mejuto, J., García-Cortéz, B., 2004, Reproductive and distribution parameters of the blue shark, Prionace glauca, on the basis of on-board observations at sea in the Atlantic, Indian and Pacific Oceans. ICCAT, Col. Vol. Sci. Pap. 58, 951–973. Google Scholar
Menezes de Lima J.H., Kotas J.E., Lin C.F., 2000, A historical review of the Brazilian longline fishery and catch of swordfish. ICCAT. Col. Vol. Sci. Pap. 51,1329–1358.
Minami, M., Lennert-Cody, C., Gao, W., Román-Verdesoto, M., 2007, Modelling shark bycatch: the zero-inflated negative binomial regression model with smoothing. Fish. Res. 84, 210–221. CrossRefGoogle Scholar
Montealegre-Quijano, S.,Vooren, C.M., 2010, Distribution and abundance of the life stages of the blue shark Prionace glauca in the Southwest Atlantic. Fish. Res. 101, 168–179. CrossRefGoogle Scholar
Montu M., Duarte A.K., Gloeden I.M., 1997, Zooplankton. In: Seeliger U., Odebrecht C, Castello J.P. (eds.) Subtropical convergence environments. Springer-Verlag, Berlin, pp. 40–43.
Nakano, H., 1994, Age, reproduction and migration of blue shark in the North Pacific Ocean. Bull. Nat. Res. Inst. Far Seas Fish. 31, 141–255. Google Scholar
Nakano H., Stevens J.D., 2008, The biology and ecology of the blue shark, Prionace glauca. In: Camhi M.D., Pikitch E.K., Babcock E.A. (eds.). Sharks of the open ocean: biology, fisheries and conservation. Blackwell Publishing Ltd. Oxford, pp. 104–151.
O’Neill, M.F., Faddy, M.J., 2003, Use of binary and truncated negative binomial modelling in the analysis of recreational catch data. Fish Res. 60, 471–477. CrossRefGoogle Scholar
Pitcher T.J, Morato T., Hart P.J.B., Clark M.R., Haggan N, Santos R.S., 2007, Seamounts: ecology, fisheries and conservation. Fisheries and Aquatic Resource Series, Blackwell, pp. 282–295.
Pratt, H.L., 1979, Reproduction in the blue shark, Prionace glauca . Fish. Bull. 77, 445–470. Google Scholar
Rogers, J.B., Pikitch, E.B., 1992, Numerical definition of ground-fish assemblages caught off the coast of Oregon and Washington using commercial fishing strategies. Can. J. Fish. Aquat. Sci. 49, 2648–2656. CrossRefGoogle Scholar
Seeliger U., Odebrecht C., Castello J.P., 1997, Subtropical convergence environments: the coast and sea in the southwestern Atlantic. Springer Verlag, Berlin.
Senba, Y., Nakano, H., 2004, Summary of species composition and nominal CPUE of pelagic sharks based on observer data from Japanese longline fishery in the Atlantic ocean from 1995 to 2003. ICCAT Col. Vol. Sci. Pap. 58, 1106–1117. Google Scholar
Shono H. 2008, Application of the Tweedie distribution to zero-catch data in CPUE analysis. Fish. Res. 93, 154–162.
Skomal, G.B., Natanson, L., 2003, Age and growth of the blue shark (Prionace glauca) in the North Atlantic Ocean. Fish. Bull. 101, 627–639. Google Scholar
Sokal R.R., Rohlf F.J., 1995, Analysis of frequencies. In: Biometry: the Principles and Practice of Statistics in Biological Research, 3rd edn. W.H. Freeman & Co., New York, pp. 685–793.
Stevens, J. D., 1992, Blue and mako shark by-catch in the Japanese longline fishery off south-eastern Australia. Aust. J. Mar. Freshw. Res. 43, 227–36. CrossRefGoogle Scholar
Strasburg, D.W., 1958, Distribution, abundance and habitats of pelagic sharks in the central Pacific Ocean. Fish. Bull. U.S. Fish. Wildlife Serv. 58, 335–361. Google Scholar
Travassos P., 1999, L’étude des relations thons -environnement dans l’océan Atlantique intertropical ouest : cas de l’albacore (Thunnus albacares Bonnaterre, 1788), du germon (Thunnus alalunga Bonnaterre, 1788) et du thon obèse (Thunnus obesus Lowe, 1839). PhD Dissertation, Université Paris.
Vas, P., 1990, The abundance of the blue shark in the western English Channel. Environ. Biol. Fish. 29, 209–225. CrossRefGoogle Scholar
Vaske, T., Rincon, G., 1998, Conteúdo estomacal dos tubarões azul (Prinace glauca) e anequim (Isurus oxyrinchus) em águas oceânicas no sul do Brasil. Rev. Bras. Biol. 3, 445–452. CrossRefGoogle Scholar
Ward, J.H., 1963, Hierarchicalgrouping to optimise an objective function. J. Am. Stat. Assoc. 58, 236–244. CrossRefGoogle Scholar
Ward P.J., Ramirez C.M., Caton A.E., 1996, The type of longlining activities of Japanese vessels in the eastern Australian fishing zone during the 1980s. In: Ward P.J.S (ed.) Japanese longlining in eastern Australian Waters 1962-1990. Bureau of Resource and Science, Canberra.
Ward, P., Myers, R.A., 2005, Shifts in open-ocean fish communities coinciding with the commencement of commercial fishing. Ecology 86, 835–847. CrossRefGoogle Scholar
Welsh, A.H., Cunningham, R.B., Donnelly, C. F., Lindenmayer, D.B., 1996, Modelling the abundance of rare species: statistical models for counts with extra zeros. Ecol. Model. 88, 297–308. CrossRefGoogle Scholar
Wu, C.L., Yeh, S.Y., 2001, Demarcation of operating areas and fishing strategies for Taiwanese longline fisheries in South Atlantic Ocean. ICCAT Col. Vol. Sci. Pap. 52, 1933–1947. Google Scholar
Zagaglia, C.R., Lorenzzetti, J.A., Stech, J.L., 2004, Remote sensing data and longline catches of yellowfin tuna (Thunnus albacares) in the equatorial Atlantic. Remote Sens. Environ. 93, 267–281. CrossRefGoogle Scholar