Thus, whether and in which life stage TSD is linked with more variable sex ratios than GSD remains to be tested in a large-scale phylogenetic comparative study. When is sex environmentally determined? Vertebrate Life. After these molluscs become female, they will be fertilized by the male above them.
From Wikipedia, the free encyclopedia. Because incubator temperatures only exceeded the pivotal temperature View author publications. Search all BMC articles Search.
Sexual Development. If the snail is attached to a female, it will become male. Tousignant, A. Charnov, E. Fertility and Sterility. Richard Shine began working with Bull during his doctoral studies in the s, and he later became a postdoctoral researcher in Charnov's lab from to
One possible explanation that TSD is common in amniotes is phylogenetic inertia — TSD is the ancestral condition in this clade and is simply maintained in extant lineages because it is currently adaptively neutral or nearly so.
Genome Biol. Temperature pulses during the thermosensitive period are often sufficient to determine sex, but after the TSP, sex is unresponsive to temperature. Although potential pathways for such effects have attracted much speculation, empirical tests largely have been precluded by logistical constraints i.