This method can accommodate multiple populations per species, so we used populations instead of species as data points to address within-species variation in the analyses [ 44 ]. TXT 10 kb. This result suggests that sex-linked mutations [ 11 ] or the accumulation of sex-antagonistic genes on sex chromosomes [ 12 ] might be relatively minor sources of interspecific variation in adult mortalities in reptiles.
Egg incubation: its effects on embryonic development in birds and reptiles. Whereas the determination coefficient has meaning when the distribution of the dependent variable is normally distributed, in the case of univariate regression, it has no meaningful statistical properties when used with proportions.
We envision a sex-determining locus S with alternative alleles. I mean a random genetic mutation that would become fixed within a species without environmental pressure. We calculated a 'constant temperature equivalent', or CTE, for each day of development [ 21 ].
Conservation implications of commercial hunting of black and spectacled caiman in the Mamiraua sustainable development reserve, Brazil. We assigned the type of sex-determination system to each species according to the Tree of Sex [ 20 ]. It has been proposed  that temperature acts on genes coding for such steroidogenic enzymesand testing of homologous GSD pathways has provided a genic starting point.
For birth sex ratios in TSD species, we did not include records in which eggs or gravid females were taken from the wild or manipulated otherwise, e. However, in the lowlands, temperatures are more constant and a longer activity season allows for favorable conditions for TSD. It is increasingly recognized that each type of sex determination is linked with a distinct set of ecological, demographic and life-history characteristics.
Mutual information reveals variation in temperature-dependent sex determination in response to environmental fluctuation, lifespan and selection. DOCX kb. J Stat Softw.