Re : Re : Cornering the causes of aging (was Re: AGING: Accumulation of D...

From: Joao Pedro de Magalhaes (
Date: Mon Jul 10 2000 - 10:54:08 MDT


>If the extrinsic mortality is high, you
>can't detect aging even when it's there.

True, but Xenopus lives about 15 years, has been widely used in the lab for
years, and yet I've never seen a Gompertz curve for it.

>I note
>that in the one case where Finch provides data (the
>three turtle species) the curves show a distinct increase
>in mortality rate over time.

There are small variations, Finch himself doesn't consider them increases in
mortality (I haven't done the calculations but I'm sure they're not
statistically significant).

I don't claim all reptilians and amphibians to be non-aging species; after
all, only a fraction of species have been studied. However, until someone
demonstrates that, at least, fertility decreases with age in some species,
I'll assume it to be that way.

>My plan for investigating aging in temporary habitat

I know it's none of my business but, why investigate shrimp aging? Oh, and I
actually didn't know they aged.

Best regards.

Joao Pedro de Magalhaes
The University of Namur (FUNDP)
Unit of Cellular Biochemistry & Biology
Rue de Bruxelles, 61
B-5000 Namur BELGIUM

Fax: + 32 81 724135
Phone: + 32 81 724133
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