“That means that males also have to mate a lot, and have good quality sperm, to outcompete rival males.”
Biologists studying kalutas — a mouse-sized marsupial found in the arid Pilbara region — believe they die en masse because of sex-driven immune system collapse.“That means that males also have to mate a lot, and have good quality sperm , to outcompete rival males,” said Genevieve Hayes, who led the University of Western Australia research team.
Scientists believe it is a rare example of male semelparity — a reproduction strategy characterised by “synchronised death”, often before offspring are born.
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