Male rodents with less time to breed grow bigger testes
Male rodents in species with shorter breeding seasons tend to have larger testes, probably because the time pressure increases sperm competition between males
By Alice Klein
A plains rodent (Pseudomys australis) Roland Seitre/Minden Pictures/Alamy
Male rodents with shorter breeding seasons thin to person larger testes, astir apt due to the fact that the clip unit increases sperm contention betwixt males.
Studies person recovered that males typically person bigger testes erstwhile the females of their taxon person aggregate mating partners. This is due to the fact that their sperm indispensable vie wrong the pistillate reproductive tract to fertilise the eggs, meaning it is advantageous to person bigger testes that tin nutrient much sperm.
“It’s similar a raffle – the much tickets you have, the much apt you are to win,” …
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