TAC assessment for single species and multiple gear fisheries with an application to the Korean hairtail fishery

This paper describes a Total Allowable Catch assessment model for a single species and multiple gear types as an improvement on TAC assessment based on a single species and a single gear type. A case study is included for a hairtail species caught mainly by the Korean pair trawl and large otter trawl gears. We use a surplus production model based on the exponential growth model to estimate biological reference points. Fishing effort for the two gears is standardized and used in a general linear model. The Fox bioeconomic model is then used to estimate economic reference points. In the Korean hairtail fishery, the TAC assessment model for a single species and multiple gear types yielded values for each reference point that were more conservative.