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
On 19-Mar-23 09:06 AM, Toine wrote:
That would be river lampreys, this is a brook lamprey they dont migrate or
feed on fish.
On Sun, 19 Mar 2023, 04:28 Alan C, <c...@lantic.net> wrote:
Ugh! Draculas of the fish world. The St. Lawrence Seaway gave Lampreys
access to the Great Lakes where they decimated the fish.
Alan C
On 18-Mar-23 10:28 PM, Toine wrote:
eeThis fish is very rare and if present an indication of water quality. I
had
the opportunity to see them because they were just being counted.
https://repiuk.nl/new/_1033255/
Lumix G9, Leica 12-60
Toine
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