Predictions & Data for this entry
|ah||51.3 ||50.3 ||(0.01951)||d||age at hatching|| StokWyne2006, GodfMros1997|
|ab||57.4 ||59.75 ||(0.04092)||d||age at birth||Stok2014|
|tp||6570 ||4714 ||(0.2825)||d||age at puberty|| Spot2004, ZugWynn1986|
|am||2.446e+04 ||2.596e+04 ||(0.0614)||d||life span||Wiki|
|Lb||4.5 ||5.366 ||(0.1925)||cm||SCL at birth|| ReicBjor2008, StokWyne2006|
|Lh||4.5 ||5.048 ||(0.1218)||cm||SCL at hatching|| ReicBjor2008, StokWyne2006|
|Lp|| 80 ||79.36 ||(0.008056)||cm||SCL at puberty|| ByrdMurp2005, EhrhYode1978, Ston1980, Nort2005, TiwaBjor2000|
|Li||105.3 ||102.5 ||(0.02621)||cm||ultimate SCL|| ByrdMurp2005, EhrhYode1978, Ston1980, Nort2005, TiwaBjor2000|
|Wwh||18.67 ||18.15 ||(0.02806)||g||yolk-free wet weight at hatching|| Acke1981gr|
|Wwb||19.41 ||21.8 ||(0.1229)||g||wet weight at birth|| ReicBjor2008, StokWyne2006|
|Wwp||7.9e+04 ||6.711e+04 ||(0.1506)||g||wet weight at puberty|| EhrhYode1978, Nort2005|
|Wwi||1.626e+05 ||1.446e+05 ||(0.1107)||g||ultimate wet weight|| EhrhYode1978, Nort2005|
|E0||2.1e+05 ||1.785e+05 ||(0.1502)||J||initial energy content of the egg||HaysSpea1991|
|Ri||0.7671 ||0.8833 ||(0.1514)||#/d||maximum reprod rate|| MillLimp2003, Tuck2010, SCDNR, HawkBrod2005, TiwaBjor2000|
| Pseudo-data at Tref|
|Data||Generalised animal||Caretta caretta||Unit||Description|
|v ||0.02 ||0.06807||cm/d||energy conductance|
|kap ||0.8 ||0.7286||-||allocation fraction to soma|
|kap_R ||0.95 ||0.95||-||reproduction efficiency|
|p_M || 18 ||11.2||J/d.cm^3||vol-spec som maint|
|k_J ||0.002 ||0.001123||1/d||maturity maint rate coefficient|
|kap_G ||0.8 ||0.8||-||growth efficiency|
|k ||0.75 ||0.7343||-||maintenance ratio|
|p_Am ||800 ||747.3||J/cm^3.d||max surf area assimilation|
|w ||1.5 ||1.704||-||omega|
|E_m ||1e+04 ||1.098e+04||J/cm^3||max reserve density|
For the Atlantic population only, part of phd research (ref: Marn2016, MarnKooy2017)
Hatching can last up to 24hrs. Hatching (exit the egg) to emergence (exit the nest) interval estimated as 4.1days at 30CYolk bag absorbed 24-48 hours after emerging, tissue density of 0.28 reported.Onset of feeding observed in sea water (at 27 C) 2-3 days after emergence = approximated as birth (ref: GodfMros1997, KraeBenn1981, Stok2014, 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),A slight change in shape present, but isomorphy good approximation. (ref: BjorBolt2000, MarnKlan2015)
Long lived species, 11-17 yrs duration of pelagic stage, 15-35 years to reach maturity (BjorBolt2000; 28yrs in Spot2004, 18yrs in ZugWynn1986) (ref: BjorBolt2000, 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: BjorBolt2000, 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)
In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is accompanied by pseudodata k = 0.7 --> value in other sea turtles
Adults have a different shape correction coefficient to allow for a change in chape (Marn et al, "Size Scaling in Western North Atlantic Loggerhead Turtles Permits Extrapolation between Regions, but Not Life Stages" ,PLOS ONE, 2015). SCL = Straight Caparace Length (preferred), CCL - Curved Carapace length
Maturity levels at hatching and emergence relatively uncertain
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
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Nina Marn, Tin Klanjsček, Lesley Stokes, and Marko Jusup.
Size scaling in western North Atlantic loggerhead turtles permits
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Bibtex file with references for this entry
Nina Marn, 2016/01/22 (last modified by Nina Marn
refer to this entry as: AmP Caretta caretta version 2018/05/18 bio.vu.nl/thb/deb/deblab/add_my_pet/