Killer whale grandmothers boost survival of calves

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Abdul Alhazred
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Killer whale grandmothers boost survival of calves

Post by Abdul Alhazred »

Killer whale grandmothers boost survival of calves
Science Daily
New research finds that killer whale grandmothers who were no longer able to reproduce had the biggest beneficial impact on the survival chances of their grand-offspring. This may be because grandmothers without calves of their own are free to focus time and resources on the latest generation, the researchers suggest. ...
Not unlike humans. Being able to stick around long enough to see your grandchildren is a species survival trait.

It's good to be top predator that way. 8)


Also, it occurs to me that "killer whale grandmother" might be a good sexual slang expression. Like "cougar" only older. :notsure:
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ed
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Re: Killer whale grandmothers boost survival of calves

Post by ed »

Everything is directed at actualizing the prime directive: survive

Did someone here say that humans are above that?
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Abdul Alhazred
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Re: Killer whale grandmothers boost survival of calves

Post by Abdul Alhazred »

ed wrote:
Wed Dec 11, 2019 2:56 pm
Everything is directed at actualizing the prime directive: survive

Did someone here say that humans are above that?
Maybe not someone here, but there are plenty of folks (including some in power) who explicitly reject human survival as a goal. And even more who reject survival of smaller than global breeding populations they belong to, such as nations.
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Re: Killer whale grandmothers boost survival of calves

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" who explicitly reject human survival as a goal."

In lieu of what? Jumping off a cliff into the ocean? :)
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ed
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Re: Killer whale grandmothers boost survival of calves

Post by ed »

I am not talking about political palaver (<---good word!!) I am talking about innate behaviors directed towards a goal.
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Witness
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Re: Killer whale grandmothers boost survival of calves

Post by Witness »

For some birds (don't remember the species), when chicks don't find a mate or a territory, they help their parents raise the next generation.

Same idea, genes shared.

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Re: Killer whale grandmothers boost survival of calves

Post by Anaxagoras »

In resident killer whales, both sons and daughters stay with their mothers for life, but they mate with individuals from a different family group. Male killer whales typically have a shorter lifespan than females with many not surviving beyond 30 years. Females usually stop reproducing in their 30s-40s, but just like humans they can live for many decades following menopause.
Interesting. Their lifespans appear to be roughly comparable to preindustrial humans.
Also:
Co-author of the study, Prof Darren Croft from the University of Exeter, said "The menopause has only evolved in humans, killer whales and three other species of toothed whales and understanding why females of these species stop reproduction well before the end of life is a long standing evolutionary puzzle.
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Witness
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Re: Killer whale grandmothers boost survival of calves

Post by Witness »

A skull cast:

Image

:sharkbait:

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Anaxagoras
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Re: Killer whale grandmothers boost survival of calves

Post by Anaxagoras »

That's quite a set of teeth.
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Re: Killer whale grandmothers boost survival of calves

Post by sparks »

Lot's of species stick around long enough to see their grand kids, but they simply don't do anything about it, not even bothering to recognize their kids. Worst case scenario the kids and grand kids end up on the lunch menu.
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Witness
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Re: Killer whale grandmothers boost survival of calves

Post by Witness »

Not even their kids (and for plants it' very bad luck to germinate under mom). Most animals never see their offspring.

For the last part, there are deep-sea fish who rely on the young… when they come back, fat and naive, from the surface.