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Publication year : 0
Thematic : Fisheries
Language : English
Note
The depletion-corrected average catch (DCAC) formula is an extension of the potential-yield formula, and it provides useful estimates
of sustainable yield for data-poor fisheries on long-lived species. Over an extended period (e.g. a decade or more), the catch is divided
into a sustainable yield component and an unsustainable “windfall†component associated with a one-time reduction in stock
biomass. The size of the windfall is expressed as being equivalent to a number of years of sustainable production, in the form of a
“windfall ratioâ€. The DCAC is calculated as the sum of catches divided by the sum of the number of years in the catch series and
this windfall ratio. Input information includes the sum of catches and associated number of years, the relative reduction in
biomass during that period, the natural mortality rate (M, which should be ,0.2 year21), and the assumed ratio of FMSY to M.
These input values are expected to be approximate, and based on the estimates of their imprecision, the uncertainty can be integrated
by Monte Carlo exploration of DCAC values.
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Keywords : Rousettus leschenaultii
Encoded by : Pauline Carmel Joy Eje
