An Overview of the Application of the Daily Egg Production Method in the Assessment and Management of Anchovy in the Southeast Atlantic
Annual estimates of anchovy spawner biomass using the daily egg-production method have been obtained from surveys conducted off South Africa since 1984. These have been combined with estimates obtained from hydro-acoustics on the same surveys, to provide a basis for annual adjustment of a total allowable catch (TAC). This TAC is aimed at maintaining constant risk of spawning escapement relative to 50% of the estimated unexploited biomass. Initial estimates of risk based on spawner stock size are updated once the strength of the recruiting year class has been determined by hydro-acoustics. Using the hydro-acoustic and daily egg production estimates together allows greater accuracy than would be possible using only one of the estimates.
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Document Type: Research Article
Publication date: 1993-09-01
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