Males show fewer tooth-rake marks when mothers are present and have stopped breeding, research showsPost-menopausal killer whales protect their sons from getting injured in fights with other whales, scientists have found.The study showed that males showed fewer tooth-rake marks - scars left when whales scrape their teeth across another's skin - when their mother was still present and had stopped breeding. But the protective effect did not extend to daughters. Continue reading...
Post-menopausal killer whales defend their sons from aggressors, study finds
20. červenece 2023 18:30
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Celý článek: https://www.theguardian.com/environment/2023/jul/20/post-menopausal-killer-whales-defend-sons-research-finds
Zdroj: The Guardian
