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Male northern quolls seem to sacrifice sleep in favour of having sex, behaviour that might be responsible for their early deaths, suggests new research into the endangered marsupials.

Australian scientists have investigated why male northern quolls usually mate themselves to death after one season, while females of the species reproduce once but live up to four years.

Tracking the activity of the carnivorous marsupials on Groote Eylandt, off the Northern Territory coast, the researchers found a lack of rest during the breeding season may contribute to the mass yearly die-off of males.

Northern quolls, which are endangered on the Australian mainland, are the largest mammals known to exhibit semelparity, a breeding strategy in which an organism dies after it reproduces for the first time. Males can weigh up to 600g, and grow to the size of a small domestic cat.

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