Anim Behav. Climate and predation dominate juvenile and adult recruitment in a turtle with temperature-dependent sex determination. We assigned the type of sex-determination system to each species according to the Tree of Sex [ 20 ]. One hypothesis is that the temperature is sensed by neurons in the central nervous system and transduced to the bipotential gonad by nerve fibers see Lance XY and ZW because our hypotheses and predictions pertain to the two systems including all their types.
Does the timing of attainment of maturity influence sexual size dimorphism and adult sex ratio in turtles? Evolution and Development.
Global Change Biol. Janzen FJ. Consequently, although hard won over many years, our field estimates for the quantitative genetics of TSD traits in painted turtles may not translate to other taxa with TSD and therefore highlight the urgency with which such studies in these other taxa are needed.
Palumbi SR. Sign In or Create an Account. For example, in a laboratory study of T pivthe ratio of estradiol to testosterone in yolks of painted turtle eggs at oviposition was correlated with offspring sex ratio Bowden et al.
Get smart. Embryonic temperature determines adult sexuality in a reptile. Inter-seasonal maintenance of individual nest site preferences in hawksbill sea turtles. In short, estrogen signaling is an evolutionarily conserved feature of ovary development reviewed in Ditewig and Yao, Phylogeny of sex-determining mechanisms in squamate reptiles: are sex chromosomes an evolutionary trap.
In this case—which governs all snake species—males are the homogametic sex ZZ and females are the heterogametic sex ZW. Abstract Temperature-dependent sex determination TSD was first reported in in an African lizard. Hormone Research.
The turtles were incubated at temperatures that produce solely males, both sexes, and solely females. Other species show disproportionately high female production at both high and low temperatures, with intermediate temperatures causing mostly male development. We expect that this mortality difference may be most pronounced in adulthood, when sexually selected traits are fully expressed.
Several possible pathways have been proposed by which reptiles with TSD may compensate for the effects of a rapidly changing climate Huey and Janzen Kamel SJ Mrosovsky N.