https://www.sciencenews.org/article/wild-female-chimps-menopause
Surprisingly long-lived wild female chimps go through menopause
OCTOBER 26, 2023

Female chimps living in an East African forest
experience menopause and then survive years, even
decades, after becoming biologically unable to
reproduce.

The apes are the first known examples of wild,
nonhuman primates to go through the
fertility-squelching hormonal changes and live
well beyond their reproductive years.

The finding raises new questions about how
menopause evolved, UCLA evolutionary anthropologist
Brian Wood and colleagues conclude in the Oct. 27
Science.

Until now, females who experience menopause and
keep living for years have been documented only
in humans and five whale species. It’s unclear
what evolutionary benefit exists to explain such
longevity past the point of being able to give
birth and pass on one’s genes.

Although evolutionary explanations for menopause
remain debatable, the new finding reflects an
especially close genetic relationship between
humans and chimps, Wood says. “Both [species] are
more predisposed to post-reproductive survival
than other great apes.”

Some evidence suggests that female fertility ends
at similar ages in humans and chimps (Pan
troglodytes) if our ape relatives live long
enough, says anthropologist Kristen Hawkes of the
University of Utah in Salt Lake City. But in other
studies, female chimps, such as those studied by
Jane Goodall at Tanzania’s Gombe National Park
starting in 1960, aged quickly and often died in
their early 30s, usually while still having
menstrual cycles, she says.
....

Primum Sapienti wrote:

> It’s unclear
> what evolutionary benefit exists to explain such
> longevity past the point of being able to give
> birth and pass on one’s genes.

No it isn't.

Experience. Knowledge. Passing it all on to others.

> the new finding reflects an
> especially close genetic relationship between
> humans and chimps, Wood says.

"Water is wet. Film at 11."

-- --

https://jtem.tumblr.com/post/733593943182311424

JTEM is so reasonable wrote:
> Primum Sapienti wrote:
>
>> It’s unclear
>> what evolutionary benefit exists to explain such
>> longevity past the point of being able to give
>> birth and pass on one’s genes.
>
> No it isn't.
>
> Experience. Knowledge. Passing it all on to others.

There are several theories

https://en.wikipedia.org/wiki/Evolution_of_menopause

There is also the so-called "male menopause".

>> the new finding reflects an
>> especially close genetic relationship between
>> humans and chimps, Wood says.
>
> "Water is wet. Film at 11."

So you finally agree humans are OoA.

Primum Sapienti wrote:

> So you finally agree humans are OoA.

Chimps are a recently evolved species that descend from an
Aquatic Ape population of Asian origins.

-- --

https://jtem.tumblr.com/post/733754887680196608

Op maandag 13 november 2023 om 21:11:05 UTC+1 schreef JTEM is so reasonable:

> Chimps are a recently evolved species that descend from an
> Aquatic Ape population of Asian origins.

:-)
JTEM, that's only half the truth: the Red Sea = 1/2 African + 1/2 Asian:
1) early-Miocene Hominoidea in swamp forests were already bipedal = vertical waders-climbers,
2) Mio-Pliocene Hominoidea lived along N-Tethys Ocean coasts (hylobatids & pongids still live in SE.Asia),
3) we have always been waterside, cf. physiology, anatomy, diet+DHA, island colonizations, intercontinental dispersals etc.,
4) - E.Afr.apiths resemble Gorilla > Pan > Homo,
- S.Afr.apiths resemble Pan > Homo or Gorilla (e.g. my Hum.Evol.papers).
https://www.gondwanatalks.com/l/the-waterside-hypothesis-wading-led-to-upright-walking-in-early-humans/

This explains “ape” anatomy:
- larger size,
- complete tail loss,
- very broad sternum+thorax+pelvis (lateral arm+leg movements),
- centrally-placed (not dorsally) = vertical spine
- etc.

Plate Tectonics & Hominoid Splittings:
~30 Ma Arabafrica approaching Eurasia formed island archipels + coastal forests++.
~25 Ma stem-Hominoidea reached these islands, became wading bipedally + climbing arms overhead: google "aquarboreal".
~20 Ma hylobatids began following N-Tethys coastal forests -> S-Asia.
~15 Ma the Mesopotamian Seaway Closure split pongids-sivapiths (E: N-Ind.Ocean) & hominids-dryopiths (W: Medit.Sea),
~10 Ma hominids s.s. (Gorilla + Homo-Pan) colonized the incipient Red Sea swamp forests.
~8 Ma N-Rift fm, followed by Gorilla -> Afar -> Praeanthropus afarensis Lucy etc. -> boisei -> today G.gorilla & G.beringei.
~5 Ma the Red Sea opened into the Gulf (Francesca Mansfield: caused by Zanclean mega-flood 5.33 Ma?) split Homo & Pan:
– Pan went right: E.Afr.coasts -> S-Rift -> Transvaal -> Australopith.africanus -> robustus (// Gorilla) -> P.troglodytes+paniscus,
– Homo went left: S.Asian coasts -> Java early-Pleist.H.erectus shallow-diving for shellfish:
- pachy-osteo-sclerotic skeleton = shallow-diving
- ear exostoses = chronic colder water irrigation
- shell engravings in Dubois’ erectus collection
- dental wear caused by shellfish: Towle cs 2022
- Pleistocene colonisations of Flores & Luzon
- brain size 2x apes+apiths: DHA etc. in sea-food
- fossilised amid barnacles & edible shellfish
- stone tool use & dexterity = sea-otter
- platy-cephalic skull = hydro-dynamic streamline
- ...
IOW, only *complete* imbeciles still believe their ancestors ran after antelopes... :-DDD