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Differential geographical trends for loggerhead turtles stranding dead or alive along the Andalusian coast, southern Spain

Published online by Cambridge University Press:  09 July 2009

Juan J. Bellido ,
Juan J. Castillo ,
Francisco Pinto ,
Juan J. Martín ,
José L. Mons ,
José C. Báez  and
Raimundo Real
Juan J. Bellido*
Affiliation:
Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, E-29071, Málaga
Juan J. Castillo
Affiliation:
Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga
Francisco Pinto
Affiliation:
Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga
Juan J. Martín
Affiliation:
Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga
José L. Mons
Affiliation:
Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga
José C. Báez
Affiliation:
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, E-29071, Málaga
Raimundo Real
Affiliation:
Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, E-29071, Málaga
*
Correspondence should be addressed to: J.J. Bellido, Aula del Mar de Málaga, Avenida M. Heredia, 35 29001, Málaga, email: [email protected]
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Abstract

Every year, an undetermined number of loggerhead turtles cross the Gibraltar Strait entering and going out of the Mediterranean Sea. An unknown percentage of them strand on the Andalusian beaches, alive or dead, with an unequal distribution along the coast. We found a geographical pattern in the density of strandings, as well as in the proportion of them that were alive and dead. Atlantic areas receive a higher number of strandings, although most of them correspond to dead individuals, especially on the west coast (province of Huelva), whereas on the Mediterranean coast there is less difference between the number of alive and dead turtles stranded. The causes of stranding also presented a spatial segregation along these coasts: net fisheries were concentrated in Huelva, cold stunning was more frequent in Atlantic Cádiz, and debilitated turtle syndrome and longline were biased to the Mediterranean coast. The Atlantic areas might be an important accumulation zone for turtles, but where they endure a high human-induced stress and mortality. In the Mediterranean area, different causes, such as the narrowness of the Alborán basin, the ocean currents, human activity, or the number of turtles crossing, may increase the number of turtles stranding alive on the coast.

Keywords

Caretta carettaspatial distributionsouth Iberian Peninsulastrandingssea turtle
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 90 , Issue 2 , March 2010 , pp. 225 - 231
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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References

REFERENCES

Báez, J.C., Camiñas, J.A. and Rueda, L. (2006) Incidental capture of marine turtles fisheries of South Spain. Marine Turtle Newsletter 111, 11–12.Google Scholar
Báez, J.C., Camiñas, J.A., Sagarminaga, R., Torreblanca, D. and Real, R. (2007) Capturas no dirigidas de tortuga boba (Caretta caretta, Linnaeus, 1758) en aguas de Andalucía y Murcia durante 2004. Munibe 25, 196–201.Google Scholar
Bellido, J.J., Martín, J.J., Castillo, J.J., Mons, J.L. and Tomás, J. (2002) Effect of external parasites (Cirripedia) on strandings rate of loggerhead turtle (Caretta caretta) on the Andalusian coast. Proceedings of the 22nd Annual Symposium on Sea Turtle Biology and Conservation, Miami, pp. 166–167.Google Scholar
Bellido, J.J., Castillo, J.J., Martín, J.J. and Mons, J.L. (2005) Consultoría y asistencia para la realización y evaluación de un estudio sobre la migración y el estado sanitario de las tortugas marinas en el litoral andaluz. Consejería de Medio Ambiente, Junta de Andalucía, 364 pp.Google Scholar
Bellido, J.J., Báez, J.C., Farfán, M.A., Camiñas, J.A., Castillo, J.J., Martín, J.J., Mons, J.L. and Real, R. (2007a) Comparación de los tamaños de las tortugas bobas (Caretta caretta, Linnaeus, 1758) varadas en las costas mediterráneas andaluzas con las de las capturas en el palangre. Munibe 25, 202–208.Google Scholar
Bellido, J.J., Castillo, J.J., Martín, J.J., Mons, J.L., Farfán, M.A. and Real, R. (2007b) Nuevas aportaciones al conocimiento de los movimientos migratorios de la tortuga boba (Caretta caretta) a través del estrecho de Gibraltar a partir de la información recopilada en varamientos. Revista Almoraima 35, 121–127.Google Scholar
Bellido, J.J., Báez, J.C., Sanchez, R.F., Castillo, J.J., Martín, J.J., Mons, J.L. and Real, R. (2008) Mass strandings of cold-stunned loggerhead turtles in the south Iberian Peninsula: ethological implications. Ethology, Ecology and Evolution 4, 401–405.CrossRefGoogle Scholar
Bjorndal, K.A., Bolten, A.B., Gordon, J. and Camiñas, J.A. (1994) Caretta caretta (loggerhead) growth and pelagic movement. Herpetological Review 25, 23–24.Google Scholar
Bolten, A.B. (2003) Active swimmers-passive drifters: the oceanic juvenile stage of loggerheads in the Atlantic system. In Bolten, A.B. and Witherington, B.E. (eds) Loggerhead sea turtles. Washington, DC: Smithsonian Institution Press, pp 63–78.Google Scholar
Byers, C.R., Steinhorst, R.K. and Krausman, P.R. (1984) Clarification of a technique for analysis of utilization-availability data. Journal of Wildlife Management 48, 1050–1053.CrossRefGoogle Scholar
Cameron, G.N. and Spencer, S.R. (2008) Mechanisms of habitat selection by the hispid cotton rat (Sigmodon hispidus). Journal of Mammalogy 89, 126–131.CrossRefGoogle Scholar
Camiñas, J.A. and De la Serna, J.M. (1995) The loggerhead distribution in the western Mediterranean Sea as deduced from captures by the Spanish long line fishery. Scientia Herpetologica 1995, 316–323.Google Scholar
Camiñas, J.A. and Valeiras, J. (2001) Critical areas for loggerhead and leatherback turtles in the Western Mediterranean Sea and the Gibraltar Strait Region. Abstracts of the First Mediterranean Conference on Marine Turtles 24–28 October 2001 Rome, pp. 11.Google Scholar
Cano, N. (1977) Resultados de la Campaña “Alboran 73”. Boletín Instituto Español de Oceanografía 1, 103–175.Google Scholar
Carreras, C., Pascual, M., Cardona, L., Fernandez, G., San Felix, M. and Aguilar, A. (2004) Origin and migration pattern of the loggerhead turtle in the western Mediterranean. Rapport et Procès-Verbaux des Réunions de la Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée 37, 328.Google Scholar
Casale, P., Mazaris, A.D., Freggi, D., Basso, R. and Argano, R. (2007) Survival probabilities of loggerhead sea turtles (Caretta caretta) estimated from capture-mark-recapture data in the Mediterranean Sea. Scientia Marina 71, 365–372.CrossRefGoogle Scholar
Cejudo, D., Varo-Cruz, N., Liria, A., Castillo, J.J., Bellido, J.J. and López-Jurado, L.F. (2006) Transatlantic migration of juvenile loggerhead turtles (Caretta caretta L.) from the Strait of Gibraltar. Marine Turtle Newsletter 114, 9–11.Google Scholar
Eckert, S.A., Moore, J.E., Dunn, D.C., Sagarminaga, R., Eckert, K.L. and Halpin, P.N. (2008). Modeling loggerhead turtle movement in the Mediterranean: importance of body size and oceanography. Ecological Applications, 18, 290–308.CrossRefGoogle ScholarPubMed
Epperly, S., Braun, J., Chester, A., Cross, F., Merriner, J., Tester, P. and Churchill, J. (1996) Beach strandings as an indicator of at sea mortality of sea turtles. Bulletin of Marine Science 59, 289–297.Google Scholar
Hart, K.M., Mooreside, P. and Crowder, L.B. (2006) Interpreting the spatio-temporal patterns of sea turtle strandings: going with the flow. Biological Conservation 129, 283–290.CrossRefGoogle Scholar
López-Jurado, L.F. and Andreu, A.C. (1998) Caretta caretta (Linnaeus, 1758). In Salvador, A. (ed.) Reptiles. Fauna Iberica, Volume 10. Madrid: Museo Nacional de Ciencias Naturales, CSIC, pp. 44–56.Google Scholar
Luschi, P., Hays, G.C. and Papi, F. (2003) A review of long-distance movements by marine turtles, and the possible role of ocean currents. Oikos 103, 293–302.CrossRefGoogle Scholar
Marco, A., Carreras, C. and Castillo, J.J. (2008) Paso atrás en la conservación de la tortuga boba del Atlántico. Quercus 266, 37–40.Google Scholar
Norton, T., Keller, J.M., Peden-Keller, M., Day, R.D., Stedman, N., Segars, A., Greiner, E., Harms, C., Frick, M., Dodd, M., Schroeder, B., Sheridan, T., Hecker, B., Jacobson, E., Foley, A., Murphy, S., Cluse, W., Teas, W. and Bresette, M. (2004) Debilitated loggerhead turtle (Caretta caretta) syndrome along the southeastern US coast: incidence, pathogenesis, and monitoring. In Baer, C.K. (ed.) Proceedings of the American Association of Zoo Veterinarians, American Association of Wildlife Veterinarians, and Wildlife Disease Association, pp. 91–93.Google Scholar
Ramos, F., Millán, M., Vila, Y., Jiménez, M.P., Bernal, M., Anade, G. and Báez, J.C. (2004) Informe de campaña BOCADEVA 0604 Campaña de evaluación de recursos pelágicos costeros del Golfo de Cádiz B/O Cornide de Saavedra (6–13 de junio de 2004). Madrid: Instituto Español de Oceanografía, Informe Técnico Ministerio de Educación y Ciencia.Google Scholar
Revelles, M., Carreras, C., Cardona, L., Marco, A, Bentivegna, F., Castillo, J.J., De Martino, G., Mons, J.L., Smith, M.B., Rico, C., Pascual, M. and Aguilar, A. (2007) Evidence for an asymmetric size exchange of loggerhead sea turtles between the Mediterranean and the Atlantic trough the Strait of Gibraltar. Journal of Experimental Marine Biology and Ecology 349, 261–271.CrossRefGoogle Scholar
Sokal, R. and Rohlf, F.J. (1981) Biometry. New York: W.H. Freeman and Company.Google Scholar
Tomás, J., Fernández, M. and Raga, J.A. (2003) Sea turtles in Spanish Mediterranean waters: surprises in 2001. Marine Turtle Newsletter 101, 1–3.Google Scholar
Tomás, J., Gozalbes, P., Raga, J.A. and Godley, B.J. (2008) Bycatch of loggerhead sea turtles: insights from 14 years of stranding data. Endangered Species Research 5, 161–169.CrossRefGoogle Scholar