Bibcode : GCBio. Alligator sex determination on temperature in Abbotsford Center for Biotechnology InformationU. In their research using American alligators, they found that a thermosensitive protein called TRPV4 is present within the developing alligator gonad inside the egg.
The developmental period during which sex determination occurs can be discovered by incubating eggs at the male-producing temperature for a certain amount of time and then shifting the eggs to an incubator at the female-producing temperature and vice versa.
Journal Information Scientific Reports 5, Article number: doi Most turtles are subject to temperature-dependent sex determination. If the eggs incubate above PLOS One.
When the team used drugs to experimentally inhibit TPRV4 thermosensor function in eggs, this impacted the genes that are important for male development, resulting in partial feminization even at male-producing temperatures. Spencer and Janzen found that hatchlings from mixed-sex nests were less energy efficient and grew less than their same-sex counterparts incubated in single-sex producing temperatures.
Newborn baby American alligator and eggs. Herpetologica 3633—36
Some reptiles such as crocodilians and some turtles are known to display temperature-dependent sex determination TSD , where the ambient temperature of the developing eggs determines the individual's sex. TSD may be advantageous and selected for in turtles, as embryo energy efficiency and hatchling size are optimized for each sex at single-sex incubation temperatures and are indicative of first-year survivorship.
Developmental Dynamics. PhD student Ryohei Yatsu said, "Reptiles can be difficult to study at times, but we were delighted to obtain such an interesting result and elucidate part of the alligator TSD mechanism.