Re: NANFA-- Re: nanfa V1 #1599: TN Collecting

Patrick Ceas (
Fri, 04 Apr 2003 08:03:07 -0600

<x-flowed> wrote:

>i think the darter size varies from location size to location. some areas
>only yield small redlines yet others can produce some massive ones. i think it is size and health of habitat that produces the according sizing.

Quality & quantity of habitat and food can certainly affect body size,
but even then, if you collect a representative sample, you can usually
lump individuals into fairly (and often quite) distinct size categories
that reflect different age groups (i.e., individuals who have
overwintered 1 yr vs 2 or 3 years). There certainly can be overlap at
the size limits of each age class, but you usually can see decent
bimodal or trimodal (or whatever) distributions of sizes.

>most darters are figured to live 2 or 3 years but some folks claim to have
>kept certain species alive for 6, 7 or even 8 years.

I have collected individuals of a few different species that, based on
size distributions relative to other individuals, I called 3 year olds
and kept them in tanks for another 2-3 years. Can't remember all the
species, but I can remember a few particular members of the orangethroat
complex, plus an orangefin, fantail, logperch, and one underappreciated
johnny. Not too unusual. I'm sure that others have kept individuals
alive longer than that.

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