Predictions & Data for this entry
COMPLETE = 3.0
MRE = 0.140
SMSE = 0.154
|ah||51.3 ||46.52 ||(0.09311)||d||age at hatching|| StokWyne2006, GodfMros1997|
|ab||57.4 ||50.26 ||(0.1244)||d||age at birth||Stok2014|
|ap||6570 ||4834 ||(0.2642)||d||age at puberty||Spot2004|
|am||2.446e+04 ||2.585e+04 ||(0.05697)||d||life span||Wiki|
|Lb||4.5 ||5.539 ||(0.2309)||cm||SCL at birth|| ReicBjor2008, StokWyne2006|
|Lh||4.5 ||5.536 ||(0.2303)||cm||SCL at hatching|| ReicBjor2008, StokWyne2006|
|Lp|| 80 ||76.79 ||(0.04012)||cm||SCL at puberty|| ByrdMurp2005, EhrhYode1978, Ston1980, Nort2005, TiwaBjor2000|
|Li||105.3 ||94.52 ||(0.102)||cm||ultimate SCL|| ByrdMurp2005, EhrhYode1978, Ston1980, Nort2005, TiwaBjor2000|
|Wwb||19.41 ||23.55 ||(0.2132)||g||wet weight at birth|| ReicBjor2008, StokWyne2006|
|Wwh||21.35 ||10.52 ||(0.5073)||g||wet weight at hatching||BennTapl1986|
|Wwp||7.9e+04 ||6.274e+04 ||(0.2059)||g||wet weight at puberty|| EhrhYode1978, Nort2005|
|Wwi||1.626e+05 ||1.17e+05 ||(0.2805)||g||ultimate wet weight|| EhrhYode1978, Nort2005|
|E0||2.1e+05 ||2.093e+05 ||(0.003524)||J||initial energy content of the egg||HaysSpea1991|
|Ri||0.7671 ||0.8533 ||(0.1124)||#/d||maximum reprod rate|| MillLimp2003, Tuck2010, SCDNR, HawkBrod2005, TiwaBjor2000|
|Uni-variate data |
|Dataset||Figure||(RE)||Independent variable||Dependent variable||Reference|
|Tae ||see Fig. 1 ||(0.07999)||temperature||age at emergence||StokWyne2006|
|tL_Stok2014_1 ||see Fig. 2 ||(0.06393)||time since birth||total length||Stok2014|
|tW_Stok2014_1 ||see Fig. 3 ||(0.06452)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_1 ||see Fig. 4 ||(0.05736)||total length||total wet weight||Stok2014|
|tL_Stok2014_2 ||see Fig. 2 ||(0.06258)||time since birth||total length||Stok2014|
|tW_Stok2014_2 ||see Fig. 3 ||(0.1305)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_2 ||see Fig. 4 ||(0.05662)||total length||total wet weight||Stok2014|
|tL_Stok2014_3 ||see Fig. 2 ||(0.07175)||time since birth||total length||Stok2014|
|tW_Stok2014_3 ||see Fig. 3 ||(0.1737)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_3 ||see Fig. 4 ||(0.03885)||total length||total wet weight||Stok2014|
|tL_Stok2014_4 ||see Fig. 2 ||(0.07325)||time since birth||total length||Stok2014|
|tW_Stok2014_4 ||see Fig. 3 ||(0.1455)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_4 ||see Fig. 4 ||(0.05885)||total length||total wet weight||Stok2014|
|tL_Stok2014_5 ||see Fig. 2 ||(0.07041)||time since birth||total length||Stok2014|
|tW_Stok2014_5 ||see Fig. 3 ||(0.2088)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_5 ||see Fig. 4 ||(0.03909)||total length||total wet weight||Stok2014|
|tL_Stok2014_6 ||see Fig. 2 ||(0.02877)||time since birth||total length||Stok2014|
|tW_Stok2014_6 ||see Fig. 3 ||(0.1001)||time since birth||total wet weight||Stok2014|
|LW_Stok2014_6 ||see Fig. 4 ||(0.08114)||total length||total wet weight||Stok2014|
|tW_Park1929_1 ||see Fig. 5 ||(0.4628)||time since birth||total wet weight|| Park1926, Park1929|
|tL_Park1926 ||see Fig. 6 ||(0.03683)||time since birth||carapace length||Park1926|
|tW_Park1929_2 ||see Fig. 5 ||(0.4029)||time since birth||total wet weight|| Park1926, Park1929|
|tW_Park1929_3 ||see Fig. 5 ||(0.08555)||time since birth||total wet weight|| Park1926, Park1929|
|tW_Park1929_4 ||see Fig. 5 ||(0.221)||time since birth||total wet weight|| Park1926, Park1929|
|tW_HildHats1927_1 ||see Fig. 5 ||(0.1867)||time since birth||total wet weight|| HildHats1927|
|tL_HildHats1927 ||see Fig. 6 ||(0.1289)||time since birth||carapace length||HildHats1927|
|tW_HildHats1927_2 ||see Fig. 5 ||(0.1363)||time since birth||total wet weight||HildHats1927|
|LW_WabnPaul2008 ||see Fig. 6 ||(0.1336)||SCL||wet weight|| WabnPaul2008|
|LF ||see Fig. 7 ||(0.1619)||SCL||eggs per clutch|| TiwaBjor2000|
| Pseudo-data at Tref|
|Data||Generalised animal||Caretta caretta||Unit||Description|
|v ||0.02 ||0.07992||cm/d||energy conductance|
|kap ||0.8 ||0.6923||-||allocation fraction to soma|
|kap_R ||0.95 ||0.95||-||reproduction efficiency|
|p_M || 18 ||11.77||J/d.cm^3||vol-spec som maint|
|k_J ||0.002 ||0.000541||1/d||maturity maint rate coefficient|
|kap_G ||0.8 ||0.7465||-||growth efficiency|
|k ||0.3 ||0.3606||-||maintenance ratio|
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 (ref: BennTapl1986)
Life stages: hatchling, pelagic juvenile, benthic juvenile, adult;switch from pelagic to benthic stage(recruitment) happens at a certain size -> 53cm SCL(min46cm SCL max64cm SCL) (ref: Bjor2000)
Long lived species, 11-17 yrs duration of pelagic stage, 15-35 years to reach maturity (Bjor2000; 28yrs in Spot2004, 18yrs in ZugWynn1986) (ref: Bjor2000, Spot2004, ZugWynn1986)
Reproduction in clutches (2-5 per reproduction season according to night watches, 3-8 according to satellite telemetry, Tuck2010) with 2-3 years remigration periods between reproduction seasons (ref: Bjor2000, Tuck2010)
Allocation to reproduction starts (maturity reached) before first nesting (ref: MillLimp2003)
Mean temperature experienced: 21.8 C, range between 18.2 and 29.2C (ref: HawkLucy2011)
for the Atlantic population
SCL = Straight Caparace Length (preferred), CCL - Curved Carapace length
Distinction between hatching (exit the egg shell) - emergence (exit the nest)- birth (onset of feeding).[see Facts for more details].
"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 emergence" reported in StokWyn2006 was predicted by the model as "age at hatching",and then corrected to age at emergence (by adding the needed number of days - see predict file for details)
Ontogenetic habitat shift occuring mostly during the juvenile stage generally means food of better quality and higher temperature -> This was not (but can be) included in the model
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
Reproduction was modeled as continous, and then approximated as clutches
A paper with a detailed discussion on the parameter values and model predictions: Marn et al.,2017, "Inferring physiological energetics of loggerhead turtle (Caretta caretta) from existing data using a general metabolic theory", MERE
In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3
South Carolina department of natural resources webpage (data for north
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,
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.
J. Byrd, S. Murphy, and A. von Harten.
Morphometric analysis of the northern subpopulation of Caretta
caretta in South Carolina, USA.
Marine Turtle Newsletter, 107:1--4, 2005.
L. M. Ehrhart and R. G. Yoder.
Marine turtles of merritt island national wildlife refuge, kennedy
space center, florida.
In G. E. Henderson, editor, Proceedings of the Florida and
interregional conference on sea turtles, July 1976, Jensen Beach, Florida,
USA, volume 33 of Florida Marine Research Publication, pages 24--25.
St. Petersburg : Florida Dept. of Natural Resources, Marine Research
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.
L. A. Hawkes, A. C. Broderick, M.H. Godfrey, and B. J. Godley.
Status of nesting loggerhead turtles Caretta caretta at Bald
Head Island (North Carolina, USA) after 24 years of intensive
monitoring and conservation.
Oryx, 39:65--72, 2005.
L. A. Hawkes, M. J. Witt, A. C. Broderick, J. W. Coker, M. S. Coyne, M. Dodd,
M. G. Frick, M. H. Godfrey, D. B. Griffin, S. R. Murphy, T. M. Murphy, K. L.
Williams, and B. J. Godley.
Home on the range: spatial ecology of loggerhead turtles in atlantic
waters of the USA.
Diversity and Distributions, 17:624--640, 2011.
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, Jun 1991.
S. F. Hildebrand and C. Hatsel.
On the growth, care and behavior of loggerhead turtles in captivity.
Proceedings of the National Academy of Sciences of the United
States of America, 13(6):374--377, 1927.
Dynamic Energy Budget theory for metabolic organisation.
Cambridge Univ. Press, Cambridge, 2010.
J. E. Kraemer and S. H. Bennett.
Utilization of posthatching yolk in loggerhead sea turtles,
Copeia, 2:406--411, 1981.
J. D. Miller, C. L. Limpus, and M. H. Godfrey.
Nest site selection, oviposition, eggs, development, hatching, and
emergence of loggerhead sea turtles.
In A.B. Bolten and B.E. Witherington, editors, Ecology and
Conservation of Loggerhead Sea Turtles, pages 125--143. University Press of
Florida, Gainesville, Florida, 2003.
T. M. Norton.
Sea turtle conservation in georgia and an overview of the Georgia
sea turtle center on Jekyll Island, Georgia.
Georgia Journal of Science, 63:287--289, 2005.
G. H. Parker.
The growth of turtles.
Proceedings of the National Academy of Sciences,
G. H. Parker.
The growth of the loggerhead turtle.
The American Naturalist, 63(687):367--373, 1929.
K. J. Reich, K. A. Bjorndal, and C. Martinez del Rio.
Effects of growth and tissue type on the kinetics of 13c and 15n
incorporation in a rapidly growing ectotherm.
Oecologia, 155:651--663, 2008.
J. R. Spotila.
Sea Turtles: A Complete Guide to their Biology, Behavior, and
The Johns Hopkins University Press and Oakwood Arts., Baltimore,
personal communication, 2014.
L. Stokes, J. Wyneken, L. B. Crowder, and J. Marsh.
The influence of temporal and spatial origin on size and early growth
rates in captive loggerhead sea turtles (Caretta caretta) in the
Herpetological Conservation and Biology, 1:71--80, 2006.
D. L. Stoneburner.
Body depth: An indicator of morphological variation among nesting
groups of adult loggerhead sea turtles (Caretta caretta).
Journal of Herpetology, 14(2):205--206, 1980.
M. Tiwari and K. A. Bjorndal.
Variation in morphology and reproduction in loggerheads,
Caretta caretta, nesting in the United States, Brazil, and
Herpetologica, 56(3):343--356, 2000.
A. D. Tucker.
Nest site fidelity and clutch frequency of loggerhead turtles are
better elucidated by satellite telemetry than by nocturnal tagging efforts:
Implications for stock estimation.
Journal of Experimental Marine Biology and Ecology, 383:48--55,
C. Wabnitz and D. Pauly.
Length-weight relationships and additional growth parameters for sea
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centre research report, page 138. Univ of British Columbia, 2008.
G. R. Zug, A. H. Wynn, and C. Ruckdeschel.
Age determination of loggerhead sea turtles, Caretta caretta,
by incremental growth marks in the skeleton.
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Bibtex files with references for this entry
Nina Marn, 2016/01/22 (last modified by Bas Kooijman
refer to this entry as: AmP Caretta caretta version 2017/11/12 bio.vu.nl/thb/deb/deblab/add_my_pet/