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Standardization of CPUE of loggerhead sea turtle (Caretta caretta) caught by pelagic longliners in the Southwestern Atlantic Ocean

Published online by Cambridge University Press:  17 March 2010

Maite Pons ,
Andrés Domingo ,
Gilberto Sales ,
Fernando Niemeyer Fiedler ,
Philip Miller ,
Bruno Giffoni  and
Mauricio Ortiz
Maite Pons
Affiliation:
Recursos Pelágicos, Dirección Nacional de Recursos Acuáticos, Constituyente 1497, CP 11200, Montevideo, Uruguay Centro de Investigación y Conservación Marina, Giannattasio km.30.500, CP 15008, El Pinar, Canelones, Uruguay
Andrés Domingo
Affiliation:
Recursos Pelágicos, Dirección Nacional de Recursos Acuáticos, Constituyente 1497, CP 11200, Montevideo, Uruguay Centro de Investigación y Conservación Marina, Giannattasio km.30.500, CP 15008, El Pinar, Canelones, Uruguay
Gilberto Sales
Affiliation:
Centro TAMAR / ICMCB, Av Farol Gargia Dávila s/n Praia do Forte, Mata de São João, Bahia, Brazil
Fernando Niemeyer Fiedler
Affiliation:
Fundação Pró-TAMAR, Rua Antônio Athanazio n 273, Itaguá, CEP: 11680-000, Ubatuba, São Paulo, Brazil
Philip Miller
Affiliation:
Recursos Pelágicos, Dirección Nacional de Recursos Acuáticos, Constituyente 1497, CP 11200, Montevideo, Uruguay Centro de Investigación y Conservación Marina, Giannattasio km.30.500, CP 15008, El Pinar, Canelones, Uruguay
Bruno Giffoni
Affiliation:
National Marine Fisheries Service, Southeast Fisheries Science Center, Miami Laboratory, 75 Virginia Beach Drive, Miami FL 33149, USA
Mauricio Ortiz
Affiliation:
Fundação Pró-TAMAR, Av. Ministro Victor Konder n° 374, Centro, CEP: 88301-700, Itajaí, Santa Catarina, Brazil
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Abstract

The population abundance estimates used in stock assessments or required to establish management measures, depend on the sampling of the entire demographic spectrum of a population resident in a given area. However, for sea turtles, most population estimates are based mainly on nesting beach survey data and only consider a fraction of the population. The Southwest Atlantic Ocean (SWA) is an important foraging and development area for juveniles of the loggerhead sea turtle Caretta caretta where reproductive stocks from various nesting beaches mix. Declines in C. caretta populations have been observed in many parts of the world and bycatch rates of this species in the SWA are among the highest worldwide. This study standardizes the catch rates of loggerheads caught by pelagic longline fisheries in the region, using data collected by observer programs from Brazil and Uruguay. Generalized linear models (GLM) with a delta lognormal approximation were used. The variables used in the model take into account spatial and temporal variations as well as the characteristics of the fleet. In total, 6 272 344 hooks were observed between 1998 and 2007, with minimum effort registered in 2000 (12 010 hooks) and maximum effort in 2005 (1 989 431 hooks). During this period 3778 loggerheads were incidentally captured. The catch rates of loggerheads by the Uruguayan and Brazilian pelagic longline fisheries show oscillations through the years without a clear tendency; however, a low negative trend was observed from 1998 to 2005 with an increase in the last two years (2006 and 2007). The capture per unit of effort (CPUE) values varied between 0.38 to 1.78 ind/1000 hooks in 2005 and 2007, respectively. Distinct zones with differential catch rates were identified, with the higher CPUE values over the continental slope of Uruguay and adjacent waters. The incidental catch rates of this species are influenced, not only by fishing area, but also by year, season, sea surface temperature and gear type. In consequence, these variables and other potential ones should be considered in bycatch estimates by different fisheries because the loggerhead sea turtles are not uniformly distributed. This study intends to contribute not only to the general knowledge of loggerhead sea turtles in the SWA but to a future assessment of their populations at a global scale.

Keywords

Sea turtlebycatchlonglineGLMSouthwestern Atlantic Ocean
Type
Research Article
Information
Aquatic Living Resources , Volume 23 , Issue 1 , January 2010 , pp. 65 - 75
Copyright
© EDP Sciences, IFREMER, IRD, 2010

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References

Acha, E.M., Mianzan, H.W., Guerrero, R.A., Favero, M., Bava, J., 2004, Marine fronts at the continental shelves of austral South America physical and ecological processes. J. Mar. Syst. 44, 83–105. CrossRef
Benito Garzón, M., Blazek, R., Neteler, M., Sánchez de Dios, R., Sainz Ollero, H., Furlanello, C., 2006, Machine learning models for predicting species habitat suitability: an example with Pinus sylvestris L. for the Iberian peninsula. Ecol. Model. 197, 383–393. CrossRef
Bolten, A.B, Bjorndal, K.A., Martins, H.R., Dellinger, T., Biscoito, M.J., Encalada, S.E., Bowen, B.W., 1998, Transatlantic developmental migrations of loggerhead sea turtles demonstrated by mtDNA sequence analysis. Ecol. Appl. 8, 1–7. CrossRef
Breiman L., Friedman J.H., Olshen R.A., Stone C.J., 1984, Classification and Regression Trees. Chapman and Hall. New York.
Bugoni, L., Mancini, P.L., Monteiro, D.S., Nascimento, L., Neves, T.S., 2008, Seabird bycatch in the Brazilian pelagic longline fishery and a review of capture rates in the southwestern Atlantic Ocean. Endang. Species Res. 5, 137–147. CrossRef
Caraccio M.N., Domingo A., Márquez A., Naro-Maciel E., Miller P., Pereira A., 2008, Las aguas del Atlántico Sudoccidental y su importancia en el ciclo de vida de la tortuga cabezona (Caretta caretta): evidencias a través del análisis del adnmt. SCRS/2007/124 Col. Vol. Sci. Pap. ICCAT, 62, 1831–1837.
Chaloupka, M.Y., Limpus, C.J., 2001, Trends in the abundance of sea turtles resident in southern Great Barrier Reef waters. Biol. Conserv. 102, 235–249. CrossRef
Chaloupka M., Dutton P., Nakano H., 2004, Status of sea turtle stocks in the Pacific. FAO Fish. Rep. R738 Suppl.
Cooke J.G., 1997, A procedure for using catch-effort indices in bluefin tuna assessments. SCRS/96/062 Col. Vol. Sci. Pap. ICCAT , 46, 228–232.
Cooke, S.J., Suski, C.D., 2004, Are circle hooks an effective tool for conserving marine and freshwater recreational catch-and-release fisheries? Aquatic Conserv: Mar. Freshw. Ecosyst. 14, 299–326. CrossRef
Crouse, D. T.,Crowder, L. B., Caswell, H., 1987, A stage.based population model for loggerhead sea turtles and implications for conservation. Ecology 68, 1412–1423. CrossRef
De'ath, G., Fabricius, K.E., 2000, Classification and regression trees: a powerful yet simple technique for ecological data analysis. Ecology 81, 3178–3192. CrossRef
Domingo, A., Menni, R.C., Forselledo, R., 2005, Bycatch of the pelagic ray Dasyatis violacea in Uruguayan longline fisheries and aspects of distribution in the southwestern Atlantic. Sci. Mar. 69, 161–166. CrossRef
Domingo A., L. Bugoni, Prosdocimi L., Miller P., Laporta M., Monteiro D.S., Estrades A., Albareda D., 2006, El impacto generado por las pesquerías en las tortugas marinas en el Océano Atlántico sud occidental. WWF Programa Marino para Latinoamérica y el Caribe, San José, Costa Rica.
Domingo, A., Mora, O., Pons, M., Miller, P., Pereyra, G., 2007, Análisis de la CPUE y la composición de tallas de pez espada (Xiphias gladius), capturado por la flota uruguaya (2001-2005) en el Atlántico SW. SCRS/2006/118 Col. Vol. Sci. Pap. ICCAT 60, 1953-1963.
Domingo A., Barceló, C., Swimmer, Y., Pons, M., Miller, P., 2009, Anzuelos circulares vs. Anzuelos “J” en la flota palangrera uruguaya. SCRS/08/035 Col. Vol. Sci. Pap. ICCAT.
Gardner, B., Sullivan, P.J., Epperly, S., Morreale, S.J., 2008a, Hierarchical modeling of bycatch rates of sea turtles in the western North Atlantic. Endang Species Res. 5, 279–289. CrossRef
Gardner, B., Sullivan, P.J., Morreale, S.J., Epperly, S., 2008b, Spatial and temporal statistical analysis of bycatch data: patterns of sea turtle bycatch in the North Atlantic. Can. J. Fish. Aquat. Sci. 65, 2461–2470. CrossRef
Giffoni B., Domingo A., Sales G., Niemeyer-Fiedler F., Miller P., 2008, Interacción de tortugas marinas (Caretta caretta y Dermochelys coriacea) con la pesca de palangre pelágico en el atlántico sudoccidental: una perspectiva regional para la conservación. SCRS/2007/168 Col. Vol. Sci. Pap. ICCAT, 62, 1861–1870.
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.
Heppell S.S. Crowder L.B., Menzel T.R., 1999, Life table analysis of long-lived marine species with implications for conservation and management. In: Musick J.A. (Ed.). Life in the slow lane: ecology and conservation of long-lived marine animals. Am. Fish. Soc. Symp. 23. Bethesda MD, pp. 137–148.
Hilborn R., Walters C.J., 1992, Quantitative fisheries stock assessment: choice: dynamics and uncertainty. New York Chapman & Hall.
IUCN, 2008, List of threatened species. A global species assessment. Available at [http://www.redlist.org]
Jiménez, S., Domingo, A., Brazeiro, A., 2009, Seabird bycatch in the Southwest Atlantic: interaction with the Uruguayan pelagic longline fishery. Polar Biol. 32, 187–196. CrossRef
Kamezaki N., Matsuzawa Y., Abe O., Asakawa H., Fujii T., 2003, Loggerhead turtle nesting in Japan. In: Bolten, A.B., Witherington, B.E. (Eds.), Loggerhead sea turtles. Washington DC, Smithsonian Books, pp. 210–217.
Kotas, J.E., Dos Santos, S., De Azevedo, V.G., Gallo, B.M.G., Barata. P.C.R., 2003, Incidental capture of loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles by the pelagic longline fishery off southern Brazil. Fish. Bull. 102, 393–399.
Lambert D., 1992, Zero-Inflated Poisson regression models with an application to defects in manufacturing, Technometrics 34, 1–14.
Lewison, R.L., Freeman, S.A., Crowder, L.B., 2004, Quantifying the effects of fisheries on threatened species: the impact of pelagic longlines on loggerhead and leatherback sea turtles. Ecol. Lett. 7, 221–231. CrossRef
Lewison, R.L, Crowder, L.B., 2007, Putting longline bycatch of sea turtles into perspective. Conserv. Biol. 21, 79–86. CrossRef
Limpus C.J., Limpus, D.J., 2003, Loggerhead turtles in the Equatorial and Southern Pacific Ocean: A species in decline. In: Bolten A.B., Witherington B.E. (Eds.). Loggerhead sea turtles. Washington DC, Smithsonian Books. pp. 199–209.
Littell R.C., Milliken, G.A., Stroup, W.W., Wolfinger, R.D., 1996, SAS® System for Mixed Models. SAS Institute Inc., Cary NC.
Lo, N.C., Jacobson, L.D., Squire, J.L., 1992, Indices of relative abundance from fish spotter data based on delta-lognormal models. Can. J. Fish. Aquat. Sci. 49, 2515–2526. CrossRef
López-Mendilaharsu, M., Sales, G., Giffoni, B., Miller, P., Niemeyer Fiedler, F., Domingo, A., 2007, Distribución y composición de tallas de las tortugas marinas (Caretta caretta y Dermochelys coriacea) que interactúan con el palangre pelágico en el Atlántico Sur. SCRS/06/134. Col. Vol. Sci. Pap. ICCAT. 60, 2094–2109.
Maunder, M.N., Punt, A.E., 2004, Standardizing catch and effort data: a review of recent approaches. Fish. Res. 70, 141–159. CrossRef
McCracken M.L., 2004, Modeling a very rare event to estimate sea turtle bycatch: lessons learned. US Dep. Commerce, NOAA Tech. Memo., NOAA-TM-NMFSPIFSC-3.
McCullagh P., Nelder J.A., 1989, Generalized Linear Models. Second Ed. Chapman & Hall, London.
Ortiz, M., Arocha, F., 2004, Alternative error distribution models for standardization of catch rates of non-target species from a pelagic longline fishery: billfish species in the Venezuelan tuna longline fishery. Fish. Res. 70, 275–297. CrossRef
Pennington, M., 1996, Estimating the mean and variance from highly skewed marine data. Fish. Bull. 94, 498–505.
Pinedo, M.C., Polacheck, T., 2004, Sea turtle by-catch in pelagic longline sets off southern Brazil. Biol. Conserv. 119, 335–339. CrossRef
Pinheiro J.C., Bates D.M., 2000, Mixed-Effects Models in S and S-Plus. Springer-Verlag, New York.
Piovano, S., Swimmer, Y., Giacoma, C., 2009, Are circle hooks effective in reducing incidental captures of loggerhead sea turtles in a Mediterranean longline fishery? Aquat. Conserv. Mar. Freshw. Ecosyst. 19, 779–785. CrossRef
R Development Core Team, 2007, R: a language and environment for statistical computing. R Foundation for statistical computing, Vienna. Available at: http://www.r-project.org/.
Reis E.C., Soares L.S., Vargas S.M., Santos F.R., Young R.J., Bjorndal K.A., Bolten A.B., Lôbo-Hajdu G., 2009, Genetic composition, population structure and phylogeography of the loggerhead sea turtle: colonization hypothesis for the Brazilian rookeries. Conserv. Genet.
Sales, G., Giffoni, B., Barata, P., 2008, Incidental catch of sea turtles by the Brazilian pelagic longline fishery. J. Mar. Biol. Assoc. UK 88, 853–864. CrossRef
Shono, H., 2008, Application of the Tweedie distribution to zero-catch data in CPUE analysis. Fish. Res. 93, 154–162. CrossRef
Spotila, J.R., Reina, R.R., Steyermark, A.C., Plotkin, P.T., Paladino, F.V., 2000, Pacific leatherback turtles face extinction. Nature 405, 529-530. CrossRef
SPREP, 2001, A review of turtle bycatch in the western and central Pacific Ocean tuna fisheries. A report prepared for the South Pacific Regional Environment Programme (SPREP) by the Oceanic Fisheries Programme, Secretariat of the Pacific Community (SPC).
Stefánsson, G., 1996, Analysis of grounfish survey abundance data: combining the GLM and Delta approaches. ICES J. Mar. Sci. 53, 577–588. CrossRef
Vayssiéres, M.P., Richard, R.E., Allen-Diaz, B.H., 2000, Classification trees: an alternative non-parametric approach for predicting species distribution. J. Veget. Sci. 11, 679–694. CrossRef
Watson, J.W., Epperly, S.P., Shah, A.K., Foster, D.G., 2005, Fishing methods to reduce sea turtle mortality associated with pelagic longlines. Can. J. Fish. Aquat. Sci. 62, 965–981. CrossRef
Witherington, B.E., Kubilis, P., Brost, B., Meylan, A., 2009, Decreasing annual nest counts in a globally important loggerhead sea turtle population. Ecol. Appl. 19, 30–54. CrossRef
Yeung, C., 2001, Analysis of marine turtle bycatch by the U.S. Atlantic pelagic longline fleet. NOAA Tech. Memo. NMFSSEFSC 455, pp. 120–142.