Which method of marine fish stock assessment ultimately attempts to estimate the population size of a fish stock born in a given year, but which are now dead, by using samples collected from the commercial fish catch at the dock, year after year?

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Natalya Barnes

29 April, 04:41

Which method of marine fish stock assessment ultimately attempts to estimate the population size of a fish stock born in a given year, but which are now dead, by using samples collected from the commercial fish catch at the dock, year after year?

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Answers (1)

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Lesly Newman · Answer 1

Virtual population analysis.

Explanation:

Virtual population analysis (VPA) is a cohort modeling technique commonly used in fisheries science for reconstructing historical fish numbers at age using information on death of individuals each year. This death is usually partitioned into catch by fisheries and natural mortality. VPA is virtual in the sense that the population size is not observed or measured directly but is inferred or back-calculated to have been a certain size in the past in order to support the observed fish catches and an assumed death rate owing to non-fishery related causes.