Caretta caretta MED (Loggerhead turtle, Mediterranean):  

Predictions & Data for this entry

Model:  std  

COMPLETE = 2.8
MRE = 0.171
SMSE = 0.254

Zero-variate data
DataObservedPredicted(RE)UnitDescriptionReference
ah49.08 49.58 (0.01018)dage at hatchReidMarg2009
ab55.18 57.84 (0.0482)dage at birth GodfMros1997, Stok2014
ap6570 4942 (0.2478)dage at puberty CasaCont2011, PiovClus2011
am2.446e+04 2.781e+04 (0.1373)dlife spanWiki
Lb4.04 5.595 (0.3849)cmSCL at birth MargArga2003, ReidMarg2009
Lp_SCL62.5 68.89 (0.1022)cmSCL at puberty MargArga2003, Groom1990, TiwaBjor2000
Lp_CCL 69 75.23 (0.09035)cmCCL at puberty MargArga2003, Groom1990, TiwaBjor2000
Li_SCL 87 81.63 (0.06168)cmultimate SCL MargArga2003, Groom1990
Li_SCL_m130 116.1 (0.1068)cmultimate SCL at f=1 FrazSchw1984
Li_CCL 91 89.16 (0.02026)cmultimate CCL MargArga2003, Groom1990
Wwb15.59 25.76 (0.6521)gwet weight at birth MargArga2003, ReidMarg2009
Wwp5.2e+04 4.807e+04 (0.07555)gwet weight at pubertyGroom1990
Wwi8.7e+04 8e+04 (0.08044)gultimate wet weightGroom1990
E01.7e+05 2.255e+05 (0.3263)Jinitial energy content of the eggHaysSpea1991
Ri0.4822 0.4852 (0.006174)#/dmaximum reprod rate BrodGlen2003, TiwaBjor2000
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
Tah see Fig. 1 (0.03212)temperatureage at hatchingReidMarg2009
tW_T3 see Fig. 2 (0.3924)time since birthtotal wet weightCate2014
tW_T4 see Fig. 2 (0.09147)time since birthtotal wet weightCate2014
tW_2202 see Fig. 3 (0.2661)time since birthtotal wet weightCate2014
tW_2206 see Fig. 4 (0.2197)time since birthtotal wet weightCate2014
tW_2207 see Fig. 5 (0.04984)time since birthtotal wet weightCate2014
tW_2208 see Fig. 5 (0.2929)time since birthtotal wet weightCate2014
tW_2209 see Fig. 5 (0.2786)time since birthtotal wet weightCate2014
tW_2210 see Fig. 5 (0.2367)time since birthtotal wet weightCate2014
tW_2211 see Fig. 4 (0.2212)time since birthtotal wet weightCate2014
tW_2213 see Fig. 3 (0.2712)time since birthtotal wet weightCate2014
tW_2215 see Fig. 5 (0.09788)time since birthtotal wet weightCate2014
tW_2217 see Fig. 3 (0.1054)time since birthtotal wet weightCate2014
tW_2218 see Fig. 3 (0.1648)time since birthtotal wet weightCate2014
tW_2220 see Fig. 4 (0.1282)time since birthtotal wet weightCate2014
tW_2221 see Fig. 4 (0.1479)time since birthtotal wet weightCate2014
tW_2222 see Fig. 4 (0.09295)time since birthtotal wet weightCate2014
tW_2223 see Fig. 5 (0.1285)time since birthtotal wet weightCate2014
tW_2224 see Fig. 4 (0.2675)time since birthtotal wet weightCate2014
tL_2206 see Fig. 5 (0.01899)time since birthCCL total lengthCate2014
LW_2206 see Fig. 6 (0.1576)CCL total lengthwet weightCate2014
tL_2207 see Fig. 7 (0.09789)time since birthCCL total lengthCate2014
LW_2207 see Fig. 6 (0.1828)CCL total lengthwet weightCate2014
tL_2208 see Fig. 7 (0.02197)time since birthCCL total lengthCate2014
LW_2208 see Fig. 6 (0.1955)CCL total lengthwet weightCate2014
tL_2209 see Fig. 7 (0.0591)time since birthCCL total lengthCate2014
LW_2209 see Fig. 6 (0.15)CCL total lengthwet weightCate2014
tL_2210 see Fig. 7 (0.03574)time since birthCCL total lengthCate2014
LW_2210 see Fig. 6 (0.144)CCL total lengthwet weightCate2014
tL_2211 see Fig. 5 (0.1086)time since birthCCL total lengthCate2014
LW_2211 see Fig. 6 (0.1775)CCL total lengthwet weightCate2014
tL_2215 see Fig. 7 (0.1131)time since birthCCL total lengthCate2014
LW_2215 see Fig. 6 (0.2093)CCL total lengthwet weightCate2014
tL_2217 see Fig. 7 (0.08738)time since birthCCL total lengthCate2014
LW_2217 see Fig. 8 (0.1143)CCL total lengthwet weightCate2014
tL_2218 see Fig. 7 (0.07561)time since birthCCL total lengthCate2014
LW_2218 see Fig. 8 (0.0991)CCL total lengthwet weightCate2014
tL_2220 see Fig. 5 (0.03247)time since birthCCL total lengthCate2014
LW_2220 see Fig. 8 (0.1369)CCL total lengthwet weightCate2014
tL_2221 see Fig. 5 (0.09038)time since birthCCL total lengthCate2014
LW_2221 see Fig. 8 (0.2126)CCL total lengthwet weightCate2014
tL_2222 see Fig. 5 (0.06446)time since birthCCL total lengthCate2014
LW_2222 see Fig. 8 (0.06733)CCL total lengthwet weightCate2014
tL_2223 see Fig. 7 (0.0223)time since birthCCL total lengthCate2014
LW_2223 see Fig. 8 (0.07573)CCL total lengthwet weightCate2014
tL_2224 see Fig. 5 (0.08363)time since birthCCL total lengthCate2014
LW_2224 see Fig. 8 (0.03563)CCL total lengthwet weightCate2014
tW_2226 see Fig. 3 (1.816)time since birthtotal wet weightCate2014
tL_2226 see Fig. 4 (0.38)time since birthstraight carapace lengthCate2014
LW_2226 see Fig. 5 (0.1108)straight carapace lengthwet weightCate2014
tW_2302 see Fig. 3 (0.2295)time since birthtotal wet weightCate2014
tL_2302 see Fig. 4 (0.1042)time since birthstraight carapace lengthCate2014
LW_2302 see Fig. 5 (0.1793)straight carapace lengthwet weightCate2014
LF see Fig. 6 (0.2417)SCLeggs per clutch TiwaBjor2000
tL_CasaPino2009 see Fig. 7 (0.2726)ageCCL CasaPino2009
tL_CasaConte2011 see Fig. 7 (0.0921)ageCCL CasaCont2011
Pseudo-data at Tref
DataGeneralised animalCaretta caretta MEDUnitDescription
v 0.02 0.07473cm/denergy conductance
kap 0.8 0.7002-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 14.32J/d.cm^3vol-spec som maint
k_J 0.002 0.00068851/dmaturity maint rate coefficient
kap_G 0.8 0.7465-growth efficiency
k 0.3 0.3772-maintenance ratio

Facts

  • Long lived species. Life stages: hatchling, pelagic juvenile, benthic juvenile, adult; switch from pelagic to benthic stage(recruitment) happens at a certain size, probably smaller than in NA, between 30-35cm CCL (ref: Bjor2000, CasaCont2011)
  • Compared to the North Atlantic population, they are smaller, possibly reach maturity younger, have more eggs per clutch but less clutches per year (ref: MargArga2003, Groom1990, BrodGlen2003)
  • Mean temperature experienced: SST of Mediterranean 19C in the west, 20C in the east basin (ref: Nykj2009)
  • Hatching can last up to 24hrs. (ref: BennTapl1986)
  • Hatching (exit the egg) to emergence (exit the nest) interval estimated as 4.1days at 30C (ref: GodfMros1997)
  • Yolk bag absorbed 24-48 hours after emerging, tissue density of 0.28 reported (ref: KraeBenn1981)
  • Onset of feeding observed in sea water (at 27 C) 2-3 days after emergence = approximated as birth (ref: Stok2014)
  • After emerging observable weight loss for the next 2-3 days (6-7 days total after hatching), connected to loss of water - not modelled (ref: BennTapl1986)

Discussion

  • for the Mediterranean population
  • SCL = Straight Caparace Length (preferred)--> del_MS, CCL - Curved Carapace length --> del_MC
  • Distinction between hatching (exit the egg shell) - emergence (exit the nest)- birth (onset of feeding). "Hatching" is added as an event with a maturity threshold E_Hh.Hatching-to-emergence period depends primarily on abiotic factors such as sand temperatureand grain size, so a "maturity level at emergence" was not introduced.
  • Age at puberty reported in literature is mostly deduced from size at first nesting + bone growth marks;onset of investement into reproduction may be sooner - 10 years from start of puberty to first nesting [Limp1990]
  • Reproduction was modeled as continous, and then approximated as eggs per clutch, with an assumption/simplificationthat all turtles have the same number of clutches and eggs per clutch. Possibly allocation into clutches should be alsoa function of size, or a function of seasonal reproduction output.
  • Ontogenetic habitat shift is occuring mostly during the juvenile stage and it generally means food of better quality, and higher temperature -> For data from wild, a biphasic growth curve can be chosen in predict file, with CCL 30 cm as L_switch.
  • Some notes on parameters: d_V is set to 0.28 in pars_init after KraeBenn1981.f for zero-variate is set to 0.6923 as Li/Lm=90/130 where Li is the max length of the Med population and Lm is the largest NA female ever observed.Parameter values were based on Caretta_caretta_NA (as in Dec2017), with anassumption that certain parameters are species (not population) specific: z, kap, E_G, T_A.In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3.
  • A paper with a detailed discussion on the parameter values and model predictions: Marn et al., "Comparing life history traits and energy budgets of Mediterranean and North Atlantic loggerhead turtles", submitted to SI of Journal of Sea Research,2017

Bibliography

  • [Wiki] http://en.wikipedia.org/wiki/Caretta_caretta.
  • [BennTapl1986] J. M. Bennett, L. E. Taplin, and G. C. Grigg. Sea water drinking as a homeostatic response to dehydration in hatchling loggerhead turtles Caretta Caretta. Comparative Biochemistry and Physiology Part A: Physiology, 83:507--513, 1986.
  • [Bjor2000] K. A. Bjorndal, A. B. Bolten, and H. R. Martins. Somatic growth model of juvenile loggerhead sea turtles Caretta caretta: duration of pelagic stage. Marine Ecology Progress Series, 202:265--272, 2000.
  • [BrodGlen2003] A. C. Broderick, F. Glen, B. J. Godley, and G. C. Hays. Variation in reproductive output of marine turtles. Journal of Experimental Marine Biology and Ecology, 288:95--109, 2003.
  • [CasaCont2011] P. Casale, N. Conte, D. Freggi, C. Cioni, and R. Argano. Age and growth determination by skeletochronology in loggerhead sea turtles (Caretta caretta) from the Mediterranean Sea. Scientia Marina, 75(1):197--203, 2011.
  • [CasaPino2009] P. Casale, P. Pino d'Astore, and R. Argano. Age at size and growth rates of early juvenile loggerhead sea turtles (Caretta caretta) in the Mediterranean based on length frequency analysis. Herpetological Journal, 19:29--33, 2009.
  • [Cate2014] Sidonie Cateau. personal communication, 2014.
  • [FrazSchw1984] N. B. Frazer and F. J. Schwartz. Growth curves for captive loggerhead turtles, Caretta caretta, in North Carolina, USA. Bulletin of Marine Science, 34(3):485--489, 1984.
  • [GodfMros1997] M. H. Godfrey and N. Mrosovsky. Estimating the time between hatching of sea turtles and their emergence from the nest. Chelonian Conservation and Biology, 2:581--585, 1997.
  • [Groom1990] B. Groombridge. Marine turtles in the Mediterranean: distribution, population status, and conservation. Technical Report 48, Report to the Council of Europe, Environmental Conservation and Management Division, 1990.
  • [HaysSpea1991] G. C. Hays and J. R. Speakman. Reproductive investment and optimum clutch size of loggerhead sea turtles (Caretta caretta). Journal of Animal Ecology, 60(2):455--462, 1991.
  • [Kooy2010] S.A.L.M. Kooijman. Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge, 2010.
  • [KraeBenn1981] J. E. Kraemer and S. H. Bennett. Utilization of posthatching yolk in loggerhead sea turtles, Caretta caretta. Copeia, 2:406--411, 1981.
  • [MargArga2003] D. Margaritoulis, R. Argano, I. Baran, F. Bentivegna, M. N. Bradai, J. A. Caminas, P. Casale, G. De Metrio, A. Demetropoulos, G. Gerosa, B. J. Godley, D. A. Haddoud, J. Houghton, L. Laurent, and B. Lazar. Loggerhead turtles in the mediterranean sea: Present knowledge and conservation perspectives. In A.B. Bolten and B.E. Witherington, editors, Loggerhead Sea Turtles, pages 175--198. Smithsonian Books, Washington D.C., 2003.
  • [Nykj2009] L. Nykjaer. Mediterranean Sea surface warming 1985-2006. Climate Research, 39:11--17, 2009.
  • [PiovClus2011] S. Piovano, M. Clusa, C. Carreras, C. Giacoma, M. Pascual, and L. Cardona. Different growth rates between loggerhead sea turtles (Caretta caretta) of Mediterranean and Atlantic origin in the Mediterranean Sea. Marine Biology, 158(11):2577--2587, 2011.
  • [ReidMarg2009] K. A. Reid, D. Margaritoulis, and J. R. Speakman. Incubation temperature and energy expenditure during development in loggerhead sea turtle embryos. Journal of Experimental Marine Biology and Ecology, 378:62--68, 2009.
  • [Stok2014] L. Stokes. personal communication, 2014.
  • [TiwaBjor2000] M. Tiwari and K. A. Bjorndal. Variation in morphology and reproduction in loggerheads, Caretta caretta, nesting in the United States, Brazil, and Greece. Herpetologica, 56(3):343--356, 2000.

Bibtex files with references for this entry


Nina Marn, 2017/04/18 (last modified by Nina Marn 2018/01/31)

accepted: 2018/02/01

refer to this entry as: AmP Caretta caretta MED version 2018/02/01 bio.vu.nl/thb/deb/deblab/add_my_pet/