[LMB] OT: Genetics & Culture

baur baur baur at chello.at
Fri Nov 17 05:59:03 GMT 2017


> 
>     M R Dolbear fm <little.egret at dolbear.fastmail.fm> hat am 17. November 2017
> um 02:18 geschrieben:
> 
> 
> 
> 
>     On Thu, 16 Nov 2017, at 23:22, Matthew George wrote:
>     > No, the reason humans need dietary vitamin C is that for some unknown
>     > reason our distant ancestors lost the enzymatic pathway to synthesize
>     > it.
>     > Other mammals can make it - indeed, one reason Native Americans in the
>     > far
>     > north didn't get scurvy is that they ate certain organs, or all their
>     > meat,
>     > raw. I vaguely recall one ethnologist discussing how after hunting a
>     > moose
>     > and butchering it for cooking and preservation, (I think) the adrenal
>     > glands were carefully cubed and distributed raw to everyone in the
>     > tribe.
>     >
>     > We survived despite losing the ability to make this essential nutrient
>     > because our early diets were rich in it. But as far as anyone can
>     > determine, there's no benefit to having lost it. Unlike the caecum or
>     > the
>     > vomeronasal organ, say. (We technically still have a vestigal,
>     > nonfunctional version of both.)
> 
>     > {NOT all} Other mammals can make it
> 
>     Guinea pigs, Fruit eating bats can't.
> 
>     https://en.wikipedia.org/wiki/Vitamin_C#Deficiency
> 
> 
>     most bats,
> 


just the fruit eating bats or the insectivore / sanguinivore too?

Servus

markus

> 
>     all guinea pigs, capybaras, and the Haplorrhini (one of the two major
> primate suborders, consisting of tarsiers, monkeys, and
>     humans and other apes). Ascorbate is also not made by many species of
>     birds and fish. All species that do not make ascorbate require it in
>     the diet
> 
>     --
>     Little Egret by email
>     Michael Dolbear in Walton-on-Thames
>     --
>     Lois-Bujold mailing list message sent to baur at chello.at
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