The population dynamics of Nemipterus marginatus (Cuvier & Val.) off Western Kalimantan, South China Sea

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Abstract
The following parameter values are derived for a West Kalimantan (West Borneo) stock of the threadfin bream, Nemipterus marginatus: L ∞= 24·5 cm(L.T.), W∞= 210g, K = 0·42, t= ‐0·41 andM= 1·73.Yield‐per‐recruit curves for N. marginatus are presented. Catch per hour of N. marginatus is very low, even in the area of highest density (=3·5 kg/h at 45 m depth). Single‐species exploitation of a stock of the type represented by N. marginatus appears unfeasible and the conclusion is reached that the traditional single‐species approach in fish population dynamics—such as exemplified in this paper—does not help in formulating rational exploitation schemes.

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