Temperature variation and sex determination in reptiles vs amphibians in York
Keywords: Sex determinationReptilesTurtlesHormones. In the late s, James J. The highlands are colder with a higher magnitude of annual temperature fluctuation and a shorter activity season, delaying maturity, thus GSD is favored so sex ratios are not skewed.
Temperature-dependent aromatase activity is also seen in diamondback terrapins, and its inhibition masculinizes their gonads Jeyasuria et al.
Adams When Bull and Eric Charnov, at the University of Utah, in Salt Lake City, Utah, proposed a model for the evolution of environmental sex determination inthey only suggested applying the model to plants and invertebrates, and not to vertebrates. Retrieved April 16, — via ETI.
Думаю, temperature variation and sex determination in reptiles vs amphibians in York Лёню натуре
Clear Turn Off Turn On. From Wikipedia, the free encyclopedia. The adaptive significance of TSD is currently not well understood. Hormones and temperature show signs of acting in the same pathway, in that less hormone is required to produce a sexual shift as the incubation conditions near the pivotal temperature.
Other species show disproportionately high female production at both high and low temperatures, with intermediate temperatures causing mostly male development. Hormone Research.
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- It is the most popular and most studied type of environmental sex determination ESD. Some other conditions, e.
- Когда в ней не было никакой необходимости.
Figure It is not thought that turtles can reverse their sex after this period. It is not known whether the temperature sensitivity resides in the aromatase gene or protein itself or in other proteins that regulate it. The evolutionary advantages and disadvantages of temperature-dependent sex determination are discussed in Chapter