An Overview of the Application of the Daily Egg Production Method in the Assessment and Management of Anchovy in the Southeast Atlantic
Abstract: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.
Document Type: Research Article
Publication date: September 1, 1993
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