Observan en las orcas la primera evidencia de implicación materna de por vida
EcoAvant.com - Portada,
Sin duda, criar descendencia implica cierto nivel de sacrificio. Esta noción, que resulta muy humana, es sorprendentemente…
Sin duda, criar descendencia implica cierto nivel de sacrificio. Esta noción, que resulta muy humana, es sorprendentemente…
Humans are one of the only animals that experience menopause. Multiple hypotheses try to explain why and highlight the…
Like humans, female killer whales stop reproducing decades before the end of their lifespan. Grandmothers might show why.
Grandmother knows best — Grandmothers help to explain an evolutionary mystery. Cathleen O’Grady – Dec 16, 2019…
Enlarge / Southern Resident killer whales, an endangered population that recently lost the oldest known grandma orca to date. (cr…
Most animals die after they’re done reproducing. But a handful of species, including humans and some whales, go through…
Two killer whales (Image by Kenneth Balcomb, Center for Whale Research) Killer whales are one of only three species to survive…
Why do some females not just reproduce until they die? As in humans, killer whale females go through a menopause and stop…
To this day, menopause remains a puzzling concept.
A study of the whales, one of only three species whose older females stop reproducing, claims competition between offspring may…
Competition could explain this evolutionary mystery
The evolution of menopause may be linked to eliminating mother-daughter competition.
Orcas. Photo by Kenneth Balcomb, Center for Whale Research. Orcas are one of only three species that are known to go through…
While many animals become less fertile as they age, only three species—humans, pilot whales, and killer whales—have females…
Competition between older female orcas and their adult daughters when they can breed simultaneously may cause the matriarch to…
Killer whales are one of only three species known to have menopause. Researchers are looking at the conflict and cooperation…
Killer whales are one of only three species known to have menopause. Researchers are looking at the conflict and cooperation…