# Availability

**URL:** <https://forum.bigfishtackle.com/t/availability/12663>\
**Category:** Fishing Glossary\
**Created:** [May 16, 2003, 8:57pm UTC](https://forum.bigfishtackle.com/t/availability/12663 "2003-05-16T20:57:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![theangler](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.bigfishtackle.com/theangler/32/12218_2.png) [@theangler](https://forum.bigfishtackle.com/u/theangler)\
**Post date:** [May 16, 2003, 8:57pm UTC](https://forum.bigfishtackle.com/t/availability/12663/1 "2003-05-16T20:57:51Z")

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1. The fraction of a fish population which lives in regions where it is susceptible to fishing during a given fishing season . This fraction receives recruits from or becomes mingled with the non-available part of the stock at other seasons, or in other years. (Any more or less completely isolated segment of the population is best treated as a separate stock.) 2. Catch per unit of effort.