Growth rates and age at adult size of loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea, estimated through capture-mark-recapture records

Authors

  • Paolo Casale Department of Animal and Human Biology, University of Rome 1 ‘La Sapienza’,
  • Antonios D. Mazaris Department of Ecology, School of Biology
  • Daniela Freggi Sea Turtle Rescue Centre WWF Italy
  • Carola Vallini A.R.C.H.E
  • Roberto Argano Department of Animal and Human Biology, University of Rome 1 ‘La Sapienza’

DOI:

https://doi.org/10.3989/scimar.2009.73n3589

Keywords:

loggerhead sea turtle, growth rate, capture‑mark‑recapture, Mediterranean

Abstract


Growth rates of the juvenile phase of loggerhead turtles (Caretta caretta) were estimated for the first time in the Mediterranean Sea from capture-mark-recapture records. Thirty-eight turtles were released from Italian coasts and re-encountered after 1.0-10.9 years in the period 1986-2007. Their mean CCL (curved carapace length) ranged from 32.5 to 82.0 cm and they showed variable growth rates, ranging from 0 to 5.97 cm/yr (mean: 2.5). The association between annual growth rate and three covariates (mean year, mean size and time interval) was investigated through a non-parametric modelling approach. Only mean size showed a clear effect on growth rate, described by a monotonic declining curve. Variability indicates that factors not included in the model, probably individual-related ones, have an important effect on growth rates. Based on the monotonic decreasing growth function which indicates no growth spurt, a von Bertalanffy growth function was used to estimate the time required by turtles to grow within the observed size range. The results indicate that turtles would take 16-28 years to reach 66.5-84.7 cm CCL, the average nesting female sizes observed at the most important Mediterranean nesting sites, which can be considered an approximation of the size at maturity.

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References

Argano, R., R. Basso, M. Cocco and G. Gerosa. – 1992. New data on loggerhead (Caretta caretta) movements within Mediterranean. Boll. Mus. Ist. Biol. Univ. Genova, 56-57: 137-163.

Balazs, G.H. and M. Chaloupka. – 2004. Thirty-year recovery trend in the once depleted Hawaiian green sea turtle stock. Biol. Conserv., 117(5): 491-498. doi:10.1016/j.biocon.2003.08.008

Bjorndal, K.A. and A.B. Bolten. – 1988. Growth rates of juvenile loggerheads, Caretta caretta, in the southern Bahamas. J. Herpetol., 22(4): 480-482. doi:10.2307/1564345

Bjorndal, K.A., A. Bolten and H.R. Martins. – 2000a. Somatic growth model of juvenile loggerhead sea turtles Caretta caretta: duration of pelagic stage. Mar. Ecol. Prog. Ser., 202: 265-272. doi:10.3354/meps202265

Bjorndal, K.A., A.B. Bolten and M.Y. Chaloupka. – 2000b. Green turtle somatic growth model: evidence for density dependence. Ecol. Appl., 10(1): 269-282.

Bolten, A.B. – 1999. Techniques for measuring sea turtles. In: K.L. Eckert, K.A. Bjorndal, F.A. Abreu-Grobois and M. Donnelly (eds.), Research and Management Techniques for the Conservation of Sea Turtles, pp. 110-114. IUCN/SSC Marine Turtle Specialist Group Publication No. 4. Washington, DC.

Carr, A. and D. Goodman. – 1970. Ecologic implications of size and growth in Chelonia. Copeia, 1970: 783-786. doi:10.2307/1442334

Carreras, C., S. Pont, F. Maffucci, M. Pascual, A. Barcelo, F. Bentivegna, L. Cardona, F. Alegre, M. SanFelix, G. Fernandez and A. Aguilar. – 2006a. Genetic structuring of immature loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea reflects water circulation patterns. Mar. Biol., 149: 1269-1279. doi:10.1007/s00227-006-0282-8

Carreras C., L. Cardona, A. Marco, M. Pascual, A. Aguilar, D. Margaritoulis, A. Rees, J.J. Castillo, J. Tomás, J.A. Raga, G. Fernández, M. SanFelix, O. Turkozan, Y. Levy, A. Gasith, M. Aureggi, M. Khalil, C. Rico and S. Roques. – 2006b. Degree of isolation of the Mediterranean nesting populations of the loggerhead sea turtle using nuclear markers. In: M. Frick, A. Panagopoulou, A.F. Rees and K. Williams (eds.), Book of abstracts, 26th Ann. Symp. Sea Turtle Biol. Conserv., p. 186. International Sea Turtle Society, Athens.

Carreras, C., M. Pascual, L. Cardona, A. Aguilar, D. Margaritoulis, A. Rees, O. Turkozan, Y. Levy, A. Gasith, M. Aureggi and M. Khalil. – 2007. The genetic structure of the loggerhead sea turtle (Caretta caretta) in the Mediterranean as revealed by nuclear and mitochondrial DNA and its conservation implications. Conserv. Genet., 8(4): 761-775. doi:10.1007/s10592-006-9224-8

Casale, P. – 2008. Incidental catch of marine turtles in the Mediterranean Sea: captures, mortality, priorities. WWF Italy, Rome.

Casale, P., D. Freggi, R. Basso and R. Argano. – 2005. Size at male puberty, sexing methods, and adult sex ratio in loggerhead turtles (Caretta caretta) from Italian waters investigated through tail measurements. Herpetol. J., 15: 145-148.

Casale, P., D. Freggi, R. Basso, C. Vallini and R. Argano. – 2007. A model of area fidelity, nomadism, and distribution patterns of loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea. Mar. Biol., 152: 1039-1049. doi:10.1007/s00227-007-0752-7

Casale P., D. Freggi, P. Gratton, R. Argano and M. Oliverio. – 2008. Mitochondrial DNA reveals regional and interregional importance of the central Mediterranean African shelf for loggerhead sea turtles (Caretta caretta). Sci. Mar., 72(3): 541-548. doi:10.3989/scimar.2008.72n3541

Casale, P., P. Pino d’Astore and R. Argano. – (in press). Age at size and growth rates of early juvenile loggerhead sea turtles (Caretta caretta) in the Mediterranean based on length frequency analysis. Herpetol. J.

Chaloupka, M., C.J. Limpus and J. Miller. – 2004. Green turtle somatic growth dynamics in a spatially disjunct Great Barrier Reef metapopulation. Coral Reefs, 23(3): 325-335. doi:10.1007/s00338-004-0387-9

Chaloupka, M. and C.J. Limpus. – 1997. Robust statistical modelling of hawksbill sea turtle growth rates (Southern Great Barrier Reef). Mar. Ecol. Prog. Ser., 146(13): 1-8. doi:10.3354/meps146001

Chaloupka, M.Y. and J.A. Musick. – 1997. Age, growth, and population dynamics. In: P.L. Lutz and J.A. Musick (eds.), The Biology of Sea Turtles, pp. 233-276. CRC Marine Biology Series, CRC Press, Inc.: Boca Raton, London, New York, Washington D.C.

Diez, C.E. and R.P. van Dam. – 2002. Habitat effect on hawksbill turtle growth rates on feeding grounds at Mona and Monito Islands, Puerto Rico. Mar. Ecol. Prog. Ser., 234: 301-309. doi:10.3354/meps234301

Dodd, C.K. Jr. – 1988. Synopsis of the biological data on the loggerhead sea turtle Caretta caretta (Linnaeus 1758). U.S. Fish Wildl. Serv., Biol. Rep. 88(14). Washington, DC.

Gayanilo, F.C. Jr., P. Sparre and D. Pauly. – 2005. FAO-ICLARM Stock Assessment Tools II (FiSAT II). User’s Guide. FAO Computerized Information Series (Fisheries). No. 8.

Hastie, T.J. and R.J. Tibshirani. – 1990. Generalized additive models. Monographs on statistics and applied probability, 43. Chapman and Hall, London

Heppell, S.S., M.L. Snover and L.B. Crowder. – 2003a. Sea turtle population ecology. In: P.L. Lutz, J.A Musick and J. Wyneken (eds.), The Biology of Sea Turtles. Volume II, pp. 275-306. CRC Marine Biology Series, CRC Press, Inc.: Boca Raton, London, New York, Washington D.C.

Heppell, S.S., L.B. Crowder, D.T. Crouse, S.P. Epperly and N.B. Frazer. – 2003b. Population Models for Atlantic Loggerheads: Past, Present, and Future. In: A.B. Bolten and B. Witherington (eds.), Loggerhead Sea Turtles, pp. 255-273. Smithsonian Institution Press, Washington, DC, USA.

Laurent, L., P. Casale, M.N. Bradai, B.J. Godley, G. Gerosa, A.C. Broderick, W. Schroth, B. Schierwater, A.M. Levy, D. Freggi, E.M. Abd El-Mawla, D.A. Hadoud, H.E. Gomati, M. Domingo, M. Hadjichristophorou, L. Kornaraky, F. Demirayak and Ch. Gautier. – 1998. Molecular resolution of marine turtle stock composition in fishery bycatch: a case study in the Mediterranean. Mol. Ecol., 7: 1529-1542. doi:10.1046/j.1365-294x.1998.00471.x PMid:9819906

Limpus, C.J. – 1990. Puberty and first breeding in Caretta caretta. In: T.H. Richardson, J.I. Richardson and M. Donnelly (compilers), Proc. 10th Ann. Works. Sea Turtle Biol. Conserv., pp. 81-83.

NOAA Technical Memorandum NMFS-SE FC-278. Miami, FL. Limpus, C.J. and P.C Reed. – 1985. The green turtle, Chelonia mydas, in Queensland: a preliminary description of the population structure in a coral reef feeding ground. In: G. Grigg, R. Shine and E. Ehmann (eds.), The biology of Australasian frogs and reptiles, pp. 47-52. Surrey Beatty & Sons, Chipping Norton, Australia.

Limpus, C.J. and M. Chaloupka. – 1997. Nonparametric regression modeling of green sea turtle growth rates (Southern Great Barrier Reef). Mar. Ecol. Prog. Ser., 149(13): 23-34. doi:10.3354/meps149023

Margaritoulis, D., R. Argano, I. Baran, F. Bentivegna, M.N. Bradai, J.A. Caminas, P. Casale, G. De Metrio, A. Demetropoulos, G. Gerosa, B. Godley, J. Houghton, L. Laurent and B. Lazar. – 2003. Loggerhead turtles in the Mediterranean Sea: present knowledge and conservation perspectives. In: A.B. Bolten and B. Witherington (eds.), Loggerhead Sea Turtles, pp. 175‑198. Smithsonian Institution Press, Washington, DC, USA.

Mazaris, A.D., O. Fiksen and Y.G. Matsinos. – 2005. Using an individual-based model for assessment of sea turtle population viability. Popul. Ecol., 47: 179-91. doi:10.1007/s10144-005-0220-5

McCullagh P. and J.A. Nelder. – 1989. Generalized linear models. Monographs on statistics and applied probability, 37. Chapman and Hall, London.

Price, E.R., B.P. Wallace, R.D. Reina, J.R. Spotila, F.V. Paladino, R. Piedra and E. Velez. – 2006. Size, growth, and reproductive output of adult female leatherback turtles Dermochelys coriacea. Endang. Species Res., 1: 41-48. doi:10.3354/esr001041

Seminoff, J.A., A. Resendiz, W.J. Nichols and T.T. Jones. – 2002. Growth rates of wild green turtles (Chelonia mydas) at a temperate foraging area in the Gulf of California, Mexico. Copeia, 2002(3): 610-617. doi:10.1643/0045-8511(2002)002[0610:GROWGT]2.0.CO;2

Von Bertalanffy, L. – 1938. A quantitative theory of organic growth (inquiries on growth laws). Human Biol., 10(2): 181-213.

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Published

2009-09-30

How to Cite

1.
Casale P, Mazaris AD, Freggi D, Vallini C, Argano R. Growth rates and age at adult size of loggerhead sea turtles (Caretta caretta) in the Mediterranean Sea, estimated through capture-mark-recapture records. Sci. mar. [Internet]. 2009Sep.30 [cited 2024Mar.29];73(3):589-95. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1088

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