In zoos and aquariums, some species of turtles and tortoises have a lower rate of ageing as they grow older
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A species’ rate of ageing refers to how much more likely individuals are to die the older they get. For most animals the rate increases rapidly as they grow older, but when it comes to some populations of turtles and tortoises in captivity, the rate decreases as they grow older, at least for certain periods of their lives.at the University of Southern Denmark. “We need to rethink the way we see evolutionary theories of ageing.”carry on growing throughout their lives.
The researchers analysed data from nearly 26,000 individuals to calculate the ageing rate for 52 species of turtles and tortoises, ensuring they had at least 100 animals of each sex, as values often differed between the sexes. In a separate analysis, also published today, Colchero and other colleagues used existing field studies of 77 species of reptiles and amphibians living in the wild and found that some populations of turtles, salamanders and tuatara – a lizard-like creature from New Zealand – also had very slow ageing rates.
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