Subject: Grow to their environment...
From: "Iain Miller"
Date: 12/8/2004 11:26 AM Central Standard Time
Message-id:


"Jon Pike" wrote in message
.159...
I'm sure you've all heard this idea before, that fish of various kinds
will
grow to fit their environment, and then stop growing.

Does anyone have good -reliable- information on the matter? I'm sure
everyone has opinions, and links to opinions, but I'd like to get a handle
on some facts if it were at all possible.
TIA username=moosespet

AIUI fish release a hormone that in high concentrations stops them growing.
Therefore if you change lots of water you get rid of it from the water - if
you don't then it builds up over time and slows their growth. Big fish in a
small tank will release more of it hence why they might be observed to only
be growing to their environment.

I.

What you left out is that this is stunting.
By stunting their growth, it affects their internal organs as well and the fish
die sooner.
They just don't stop growing and all is fine.