Age class structure

An age class structure in Fisheries and Wildlife is a part of population assesment. Age can be determined by fish scales, examination of teeth in many species, and with many methods both lethal and non-lethal.

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Analyzing Fisheries Age Class Structure

An age class structure with gaps in it, for instance a regular bell curve for the population of 1-5 year old fish, excepting a very low population for the 3 year olds implies a bad spawning year 3 years ago in that species.

Often fish in younger age class structures have very low numbers because they simply went through the sampling nets, and may in fact have a very healthy population.