Predictions & Data for this entry
| Model: std | climate: MB | migrate: Mo | phylum: |
| COMPLETE = 2.8 | ecozone: MAm | food: biCi | class: |
| MRE = 0.103 | habitat: 0bTd, biMcp | gender: Dtmf | order: |
| SMSE = 0.029 | embryo: Tt | reprod: O | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| ah | 49.08 | 49.58 | (0.01013) | d | age at hatch | ReidMarg2009 |
| ab | 55.18 | 58.07 | (0.05242) | d | age at birth | GodfMros1997, Stok2014 |
| tp | 18 | 12.41 | (0.3108) | yr | age at puberty | CasaCont2011, PiovClus2011 |
| am | 67 | 67 | (5.336e-05) | d | life span | Wiki |
| Lb | 4.04 | 5.173 | (0.2804) | cm | SCL at birth | MargArga2003, ReidMarg2009 |
| Lp_SCL | 62.5 | 67.8 | (0.0848) | cm | SCL at puberty | MargArga2003, Groom1990, TiwaBjor2000 |
| Lp_CCL | 69 | 72.8 | (0.05514) | cm | CCL at puberty | MargArga2003, Groom1990, TiwaBjor2000 |
| Li_SCL | 87 | 82.85 | (0.04772) | cm | ultimate SCL | MargArga2003, Groom1990 |
| Li_CCL | 91 | 88.96 | (0.02237) | cm | ultimate CCL | MargArga2003, Groom1990 |
| Wwb | 15.59 | 18.97 | (0.2167) | g | wet weight at birth | MargArga2003, ReidMarg2009 |
| Wwp | 5.2e+04 | 4.271e+04 | (0.1786) | g | wet weight at puberty | Groom1990 |
| Wwi | 8.7e+04 | 7.793e+04 | (0.1042) | g | ultimate wet weight | Groom1990 |
| E0 | 1.7e+05 | 1.566e+05 | (0.07868) | J | initial energy content of the egg | HaysSpea1991 |
| Ri | 0.4822 | 0.5158 | (0.0697) | #/d | maximum reprod rate | BrodGlen2003, TiwaBjor2000 |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| tW_T3T4 |   | time since birth | total wet weight | (0.2284) | Cate2014 |
| tW_Cate23 | | time since birth | total wet weight | (0.1763) | Cate2014 |
| tW_Cate23_X | | time since birth | total wet weight | (0.2626) | Cate2014 |
| tW_Cate23_25 |   | time since birth | total wet weight | (0.2535) | Cate2014 |
| tW_Cate23_26 | | time since birth | total wet weight | (0.3532) | Cate2014 |
| tW_Cate23_22 | | time since birth | total wet weight | (0.1272) | Cate2014 |
| tL_Cate23 |   | time since birth | curved carapace length | (0.06439) | Cate2014 |
| tL_CateX | | time since birth | curved carapace length | (0.0465) | Cate2014 |
| tL_Cate23_26 | | time since birth | curved carapace length | (0.08816) | Cate2014 |
| tL_Cate22 | | time since birth | curved carapace length | (0.0643) | Cate2014 |
| tL_Cate23_26s |   | time since birth | straight carapace length | (0.2476) | Cate2014 |
| tL_Cate22s | | time since birth | straight carapace length | (0.02) | Cate2014 |
| tL_CasaPino2009 |   | age | CCL | (0.2335) | CasaPino2009 |
| tL_CasaConte2011 | | age | CCL | (0.306) | CasaCont2011 |
| Tah_Reid |   | temperature | age at hatching | (0.0312) | ReidMarg2009 |
| Tah_Zbin | | temperature | age at hatching | (0.04137) | ZbinMarg2006 |
| LN |  | SCL | eggs per clutch | (0.2554) | TiwaBjor2000 |
| LW_Cate |  | CCL total length | wet weight | (0.1472) | Cate2014 |
| sLW_Cate |  | straight carapace length | wet weight | (0.101) | Cate2014 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Caretta caretta MED | Unit | Description |
|---|---|---|---|---|
| v | 0.02 | 0.07214 | cm/d | energy conductance |
| p_M | 18 | 13.5 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 0.001523 | 1/d | maturity maint rate coefficient |
| k | 0.75 | 0.8256 | - | maintenance ratio |
| kap | 0.8 | 0.7334 | - | allocation fraction to soma |
| kap_G | 0.8 | 0.8 | - | growth efficiency |
| kap_R | 0.95 | 0.95 | - | reproduction efficiency |
| p_Am | 1000 | 895 | J/cm^3.d | max surf area assimilation |
| w | 1.5 | 1.926 | - | omega |
| E_m | 1e+04 | 1.241e+04 | J/cm^3 | max reserve density |
Discussion
- Based on entry for NA population, with tissue density (d_V, E_G; kap_G = 0.8) assumed same, and z constrained to not be larger thanthat of NA. T_A estiamated independently.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.
- Same as in NA: Parameters estimated with t_0 = 0 (!) and only after that t_0=15 introduced and fine-tuned with estimation while other pars fixed
- In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is accompanied by pseudodata k = 0.75 --> value in other sea turtles
- 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]
- 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.
Facts
- For the Mediterranean population, based on NA population, part of phd research; SCL = Straight Caparace Length (preferred)--> del_MS, CCL - Curved Carapace length --> del_MC (Ref: Marn2016, MarnKooy2017, MarnJusu2018)
- 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)
Bibliography