Zoologger is our column that is weekly highlighting pets – and occasionally other organisms – from about the whole world
Species: The main dragon that is beardedPogona vitticeps)Habitat: Arid woodlands and deserts in Central Australia
If you can’t stay heat, modification intercourse. Male lizards from Australia become super-fecund females in warm weather.
Rising temperatures can lead to a sex change avalanche that pushes populations – and perhaps the species that are entire towards a culture without adult men.
An embryo to develop as either a male or a female for some reptiles, such as many snakes and lizards, sex chromosomes trigger. For other people, including crocodiles, alligators and marine turtles, intercourse is dependent upon heat, with extremes generally resulting in more females, maybe by inhibiting male genes.
Bearded dragons reveal a third means – a kind of evolutionary change amongst the two.
Like us, they usually have sex chromosomes. A female for them it’s a Z and a W. Having ZZ chromosomes normally makes a male, and ZW. However, if male eggs are subjected to temperatures over 32 °C, this logic gets overridden. Continue reading “Zoo logger: The lizard that changes its intercourse to match the weather”