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Running against time: conservation of the remaining hawksbill turtle (Eretmochelys imbricata) nesting population in the Dominican Republic

Published online by Cambridge University Press:  29 October 2012

Ohiana Revuelta ,
Yolanda M. León ,
Francisco J. Aznar ,
Juan A. Raga  and
Jesús Tomás
Ohiana Revuelta
Affiliation:
Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
Yolanda M. León
Affiliation:
Grupo Jaragua, El Vergel 33, El Vergel, Santo Domingo, Dominican Republic Instituto Tecnológico de Santo Domingo, Santo Domingo, Dominican Republic
Francisco J. Aznar
Affiliation:
Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
Juan A. Raga
Affiliation:
Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
Jesús Tomás*
Affiliation:
Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
*
Correspondence should be addressed to: J. Tomás, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain email: jesus.tomas@uv.es
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Abstract

Saona Island hosts the last hawksbill turtle (Eretmochelys imbricata) nesting population in the Dominican Republic, which has experienced a severe decline in the last decades, mostly due to illegal egg take. Here we present the results of an artificial incubation programme started in 2007 to protect the clutches from human predation. A preliminary survey in 2006 showed that about 60% of clutches laid were taken by humans. Over the study period (2007–2010) we recorded 400 clutches, of which 38.2% were predated by humans, 40.7% were artificially incubated and 21% were incubated in situ. Overall, the artificial incubation programme allowed the release of 12,340 hatchlings. No differences were found in hatching and emergence success between clutches incubated in situ and clutches artificially incubated. However, incubation temperatures and incubation durations recorded suggest a male-biased hatchling sex-ratio in artificially incubated clutches. Although artificial incubation may mitigate the effect of egg take, our results indicate that other measures, such as clutch relocation to protected sections of the beach should be taken. Beach patrolling and education are currently implemented so that artificial incubation will be eventually phased out in favour of in situ incubation.

Keywords

Eretmochelys imbricataDominican Republicconservationartificial incubationhuman egg takeemergence successsex-ratio
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 4 , June 2013 , pp. 1133 - 1140
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012 

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References

REFERENCES

Almeida, A.P. and Mendes, S.L. (2007) An analysis of the role of local fishermen in the conservation of the loggerhead turtle (Caretta caretta) in Pontal do Ipiranga, Linhares, ES, Brazil. Biological Conservation 134, 106–112.CrossRefGoogle Scholar
Beggs, J.A., Horrocks, J.A. and Krueger, B.H. (2007) Increase in hawksbill sea turtle Eretmochelys imbricata nesting in Barbados, West Indies. Endangered Species Research 3, 159–168.CrossRefGoogle Scholar
Carrillo, E., Webb, G. and Manolis, C. (1999) Hawksbill turtles (Eretmochelys imbricata) in Cuba: an assessment of the historical harvest and its impacts. Chelonian Conservation and Biology 3, 264–280.Google Scholar
Chan, E.H. (1989) White spot development, incubation and hatching success of leatherback turtle (Dermochelys coriacea) eggs from Rantau Abang, Malaysia. Copeia 1, 42–47.CrossRefGoogle Scholar
Chantrapornsyl, S. (1992) Artificial incubation and embryonic development of olive ridley turtle eggs. Phuket Marine Biological Center Research Bulletin 57, 41–50.Google Scholar
DeGregorio, B.A. and Southwood Williard, A. (2011) Incubation temperatures and metabolic heating of relocated and in situ loggerhead sea turtle (Caretta caretta) nests at a northern rookery. Chelonian Conservation and Biology 10, 54–61.CrossRefGoogle Scholar
Dutton, P.H., Whitmore, C.P. and Mrosovsky, N. (1985) Masculinisation of leatherback turtle Dermochelys coriacea hatchlings from eggs incubated in Styrofoam boxes. Biological Conservation 31, 249–264.CrossRefGoogle Scholar
Dutton, D.L., Dutton, P.H., Chaloupka, M. and Boulon, R.H. (2005) Increase of a Caribbean leatherback turtle Dermochelys coriacea nesting population linked to long-term nest protection. Biological Conservation 126, 186–194.CrossRefGoogle Scholar
Eckert, K.L. (1999) Designing a conservation program. In Eckert, K.L., Bjorndal, K.A., Abreu-Grobois, F.A. and Donnelly, M. (eds) Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No. 4, pp. 6–8.Google Scholar
Eckert, K.L. and Eckert, S.A. (1990) Embryo mortality and hatch success in in situ and translocated leatherback sea turtle Dermochelys coriacea eggs. Biological Conservation 53, 37–46.CrossRefGoogle Scholar
Fleming, E.H. (2001) Swimming against the tide: recent surveys of exploitation, trade, and management of marine turtles in the northern Caribbean. Washington, DC: TRAFFIC North America.Google Scholar
García, A., Ceballos, G. and Adaya, R. (2003) Intensive beach management as an improved sea turtle conservation strategy in Mexico. Biological Conservation 111, 253–261.CrossRefGoogle Scholar
Godfrey, M.H. and Mrosovsky, N. (1999) Estimating hatchling sex ratios. In Eckert, K.L., Bjorndal, K.A., Abreu-Grobois, F.A. and Donnelly, M. (eds) Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No. 4, pp. 6–8.Google Scholar
Hawkes, L.A., Tomás, J., Revuelta, O., León, Y.M., Blumenthal, J.M., Broderick, A.C., Fish, M., Raga, J.A., Witt, M.J. and Godley, B.J. (2012) Migratory patterns in hawksbill turtles described by satellite tracking. Marine Ecology Progress Series 461, 223–232.CrossRefGoogle Scholar
Hillis, Z.M. and Phillips, B. (1996) The year of expanding, standardizing and planning for the future of hawksbill turtle research at Buck Island reef NM. In Proceedings of the 15th Annual Symposium on Sea Turtle Biology and Conservation, 20–25 February 1995. Hilton Head, South Carolina, USA. [Abstract.]Google Scholar
Horrocks, J.A. and Scott, N. McA. (1991) Nest site location and nest success in the hawksbill turtle Eretmochelys imbricata in Barbados, West Indies. Marine Ecology Progress Series 69, 1–8.CrossRefGoogle Scholar
IUCN (2011) Red list of threatened species. Available at URL: http://www.iucnredlist.org (accessed 19 November 2011).Google Scholar
Kamel, S.J. and Mrosovsky, N. (2006) Deforestation: risk of sex ratio distortion in hawksbill sea turtles. Ecological Applications 16, 923–931.CrossRefGoogle ScholarPubMed
Kamel, S.J. and Delcroix, E. (2009) Nesting ecology of the hawksbill turtle, Eretmochelys imbricata, in Guadeloupe, French West Indies from 2000–07. Journal of Herpetology 43, 367–376.CrossRefGoogle Scholar
Kornaraki, E., Matossiana, D.A., Mazarisa, A.D., Matsinosa, Y.G. and Margaritoulis, D. (2006) Effectiveness of different conservation measures for loggerhead sea turtle (Caretta caretta) nests at Zakynthos Island, Greece. Biological Conservation 130, 324–330.CrossRefGoogle Scholar
Lagueux, C.J. and Campbell, C.L. (2005) Marine turtle nesting and conservation needs on the south-east coast of Nicaragua. Oryx 39, 398–405.CrossRefGoogle Scholar
Lagueux, C.J., Campbell, C.L. and McCoy, W.A. (2003) Nesting and conservation of the hawksbill turtle, Eretmochelys imbricata, in the Pearl Cays, Nicaragua. Chelonian Conservation and Biology 4, 588–602.Google Scholar
Liles, M.J., Jandres, M.V., López, W.A., Mariona, G.I., Hasbún, C.R. and Seminoff, J.A. (2011) Hawksbill turtles Eretmochelys imbricata in El Salvador: nesting distribution and mortality at the largest remaining nesting aggregation in the eastern Pacific Ocean. Endangered Species Research 14, 23–30.CrossRefGoogle Scholar
Marcovaldi, M.A., Lopez, G., Soaresi, L.S., Santos, A., Bellini, C. and Barata, P. (2007) Fifteen years of hawksbill sea turtle (Eretmochelys imbricata) nesting in northern Brazil. Chelonian Conservation and Biology 6, 223–228.CrossRefGoogle Scholar
Martin, R.E. (1996) Storm impacts on loggerhead turtle reproductive success. Marine Turtle Newsletter 73, 10–12.Google Scholar
McClenachan, L., Jackson, J.B.C. and Newman, M.J.H. (2006) Conservation implications of historic sea turtle nesting beach loss. Frontiers in Ecology and the Environment 4, 290–296.CrossRefGoogle Scholar
Meylan, A.B. (1999) Status of the hawksbill turtle, Eretmochelys imbricata, in the Caribbean region. Chelonian Conservation and Biology 3, 177–184.Google Scholar
Meylan, A.B. (2002) Global Status Review of the hawksbill turtle (Eretmochelys imbricata), with an emphasis on the wider Caribbean. An Addendum for the Second CITES wider Caribbean hawksbill turtle dialogue meeting, Cayman Islands (U.K.) 21–23 May 2002. In Marine Turtle Specialist Group 2007 IUCN red list status assessment.Google Scholar
Miller, J.D. (1999) Determining clutch size and hatch success. In Eckert, K.L., Bjorndal, K.A., Abreu-Grobois, F.A. and Donnelly, M. (eds) Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No. 4, pp. 6–8.Google Scholar
Moncada, F., Carrillo, E., Saenz, A. and Nodarse, G. (1999) Reproduction and nesting of the hawksbill turtle, Eretmochelys imbricata, in the Cuban Archipelago. Chelonian Conservation and Biology 3, 257–263.Google Scholar
Morreale, S.J., Ruiz, G.J., Spotila, J.R. and Standora, E.A. (1982) Temperature-dependent sex determination: current practices threaten conservation of sea turtles. Science 216, 1245–1247.CrossRefGoogle ScholarPubMed
Mortimer, J.A. (1999) Reducing threats to eggs and hatchlings: hatcheries. In Eckert, K.L., Bjorndal, K.A., Abreu-Grobois, F.A. and Donnelly, M. (eds) Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No. 4, pp. 6–8.Google Scholar
Mrosovsky, N. (1994) Sex ratios of sea turtles. Journal of Experimental Zoology 270, 16–27.CrossRefGoogle Scholar
Mrosovsky, N. and Pieau, C. (1991) Transitional range of temperature, pivotal temperatures and thermosensitive stages for sex determination in reptiles. Amphibia-Reptilia 12, 169–179.CrossRefGoogle Scholar
Mrosovsky, N., Kamel, S.J., Diez, C.E. and van Dam, R.P. (2009) Methods of estimating natural sex ratios of sea turtles from incubation temperatures and laboratory data. Endangered Species Research 8, 147–155.CrossRefGoogle Scholar
Öz, M., Erdogan, A., Kaska, Y., Düsen, S., Aslan, A., Sert, H., Yavuz, M. and Tunc, M.R. (2004) Nest temperatures and sex-ratio estimates of loggerhead turtles at Patara beach on the south western coast of Turkey. Canadian Journal of Zoology 82, 94–101.CrossRefGoogle Scholar
Pérez-Castañeda, R., Salum-Fares, A. and Defeo, O. (2007) Reproductive patterns of the hawksbill turtle Eretmochelys imbricata in sandy beaches of the Yucatan Peninsula. Journal of the Marine Biological Association of the United Kingdom 87, 815–824.CrossRefGoogle Scholar
Pintus, K.J., Godley, B.J., McGowan, A. and Broderick, A.C. (2009) Impact of clutch relocation on green turtle offspring. Journal of Wildlife Management 73, 1151–1157.CrossRefGoogle Scholar
Pritchard, P. (1995) Recovered sea turtle populations and U.S. recovery team efforts. In Bjorndal, K. (ed.) Biology and conservation of sea turtles. Washington, DC: Smithsonian Institution Press, pp. 503–511.Google Scholar
Revuelta, O., León, Y.M., Feliz, P., Godley, B.J., Raga, J.A. and Tomás, J. (2012) Protected areas host important remnants of marine turtle nesting stocks in the Dominican Republic. Oryx 46, 348–358.CrossRefGoogle Scholar
Richardson, J.I., Hall, D.B., Mason, P.A., Andrews, K.M., Bjorkland, R., Cai, Y. and Bell, R. (2006) Eighteen years of saturation tagging data reveal a significant increase in nesting hawksbill sea turtles (Eretmochelys imbricata) on Long Island, Antigua. Animal Conservation 9, 302–307.CrossRefGoogle Scholar
Sarti Martínez, L., Barragán, A.R., García Muñoz, D., García, N., Huerta, P. and Vargas, F. (2007) Conservation and biology of the leatherback turtle in the Mexican Pacific. Chelonian Conservation and Biology 6, 70–78.CrossRefGoogle Scholar
Sato, F. and Madriasau, B.B. (1991) Preliminary report on natural reproduction of hawksbill sea turtles in Palau. Marine Turtle Newsletter 55, 12–14.Google Scholar
Sokal, R.R. and Rohlf, F.J. (1995) Biometry: the principles and practice of statistics in biological research. 3rd edition. New York: W.H. Freeman and Co.Google Scholar
van Dam, R.P. and Diez, C.E. (1998) Caribbean hawksbill turtle morphometrics. Bulletin of Marine Science 62, 145–155.Google Scholar
Wallace, B.P., Dimatteo, A.D., Hurley, B.J., Finkbeiner, E.M., Bolten, A.B., Chaloupka, M.Y., Hutchinson, B.J., Abreu-Grobois, F.A., Amorocho, D., Bjorndal, K.A., Bourjea, J., Bowen, B.W., Briseño Dueñas, R., Casale, P., Choudhury, B.C., Costa, A., Dutton, P.H., Fallabrino, A., Girard, A., Girondot, M., Godfrey, M.H., Hamann, M., López-Mendilaharsu, M., Marcovaldi, M.A., Mortimer, J.A., Musick, J.A., Nel, R., Pilcher, N.J., Seminoff, J.A., Troëng, S., Whiterington, B. and Mast, R.B. (2010) Regional management units for marine turtles: framework for prioritizing conservation and research across multiple scales. PloS One 5, 1–11. doi:10.1371/journal.pone.0015465.CrossRefGoogle ScholarPubMed
White, T.H. Jr, Jhonson Camacho, A., Bloom, T., Lancho Diéguez, P. and Sellares, R. (2011) Human attitudes and perceptions regarding endangered species conservation: a case study of Saona Island, Dominican Republic. Latin American Journal of Conservation 2, 18–29.Google Scholar
Whitmore, C.P. and Dutton, P.H. (1985) Infertility, embryonic mortality and nest-site selection in leatherback and green sea turtles in Suriname. Biological Conservation 34, 251–272.CrossRefGoogle Scholar
Wibbels, T. (2003) Critical approaches to sex determination in sea turtles. In Lutz, P.L., Musick, J.A. and Wyneken, J. (eds) The biology of sea turtles. Volume II. Boca Raton, FL: CRC Press, pp. 103–134.Google Scholar
Yntema, C.L. and Mrosovsky, N. (1982) Critical periods and pivotal temperatures for sexual differentiation in loggerhead turtles. Canadian Journal of Zoology 60, 1012–1016.CrossRefGoogle Scholar