Bill,
Do a search on "Selection for Vulnerability to Angling in Largemouth Bass". This paper, although public domain, was published in the AFS journal. I know you have access from there. Others interested can find a downloadable copy from Science Direct doing a google search on the title.
FWIW, I should not have described the topic as "Catchability". The authors name it "Vulnerability to Angling". Properly, vulnerability to angling is how I should have described it.
One of the rules of science, is that a measurable be defined as something that normally has a non-null value. So, vulnerability or catchability would meet that criteria. Non-catchable, uncatchable, invulnerable ... these all define as a null metric and thus they are not an appropriate metric.
