Table 2. Computation of turtle abundance, survival, and related parameters based on estimates of hatchling production, new recruits, and sex ratios from the literature.
Variable | Low | Mean | High | References | |
Number of hatchlings | 41,275 | 128,031 | 303,578 | ||
Age: 2.7×10−3<t<1 | Abundance (t) | Nt = 41275e −1.38(t-0.0027) | Nt = 128031e −1.38(t-0.0027) | Nt = 303578e −1.38(t-0.0027) | |
Annual survival | 0.25 | 0.25 | 0.25 | [37] | |
Mortality coefficient yr−1 | 1.38 | 1.38 | 1.38 | ||
Number of yearlings | 10,425 | 32,338 | 76,679 | ||
Age: 1<t<16 | Abundance (t) | Nt = 10425e −0.143(t-1) | Nt = 32338e −0.216(t-1) | Nt = 76679e −0.296(t-1) | |
Annual survival | 0.87 | 0.81 | 0.76 | ||
Mortality coefficient yr−1 | 0.143 | 0.216 | 0.271 | ||
Number of recruits to adult pop. | 1217 | 1268 | 1318 | [2], [37], [38], [39] | |
Age: 16<t | Abundance (t) | Nt = 1217e −0.333(t-16) | Nt = 1268e −0.229(t-16) | Nt = 1318e −0.177(t-16) | |
Annual survival | 0.72 | 0.79 | 0.84 | ||
Mortality coefficient yr−1 | 0.333 | 0.229 | 0.177 | ||
Total number of adults in pop. | 4292 | 6199 | 8103 |