There are certainly many known examples of fish and amphibians with GSD, in which both high and low incubation temperatures can cause sex reversal. Sex determination and differentiation. A study found that hot temperatures altered the expression of the sex chromosomes in Australia's bearded dragon lizards.
Similarly, the presence of large numbers of males will cause some of the males to become females. Nature has provided many variations on her masterpiece. While TSD has been observed in many reptile and fish species, the genetic differences between sexes and molecular mechanisms of TSD have not been determined.
This is called temperature-dependent sex determination, or TSD. An Introduction to Behavioral Endocrinology.
In future, we would like to know how an unstable environmental factor such as incubation temperature was able to establish itself as a sex determination factor. NCBI Bookshelf. A study found that hot temperatures altered the expression of the sex chromosomes in Australia's bearded dragon lizards.
Show details Gilbert SF. Sexual differentiation humans Development of the reproductive system gonads Mesonephric duct Paramesonephric duct.
The turtles were incubated at temperatures that produce solely males, both sexes, and solely females. Journal of Animal Ecology. In this species, individuals pile up on top of one another to form a mound Figure The lizards were female in appearance and were capable of bearing offspring, despite having the ZZ chromosomes usually associated with male lizards.