> On Mar 19, 2023, at 4:59 AM, Alan C <c...@lantic.net> wrote:
>
> I did some research. Lampreys have a very unusual lifecycle - egg, larva,
> adult & then die immediately after procreating for the first time. The big
> difference between the species is the larval stage which can last from 2 to
> 10 years. The life cycle of the brook lamprey is very short. Their larvae
> feed on algae & rubbish before transforming into sexually mature adults. The
> digestive tract of all adults quickly becomes degenerate so they can no
> longer feed in the normal way. The larger species like the river lampreys
> which have specially adapted mouthparts become parasitic & are able to
> survive a few more years on a blood diet. Eventually, they too perish after
> procreation. Parasitism of humans has been recorded but is uncommon.
>
> Alan C
I've never seen a live one, but when I was a kid my back yard was littered with
their corpses as they'd die after spawning and would catch on rocks and sticks
in the river shallows.
https://coastal-watershed.org/lamprey-san-lorenzo-river/
--
Larry Colen
l...@red4est.com. sent from Mirkwood
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