STOCK ASSESSMENT OF 2 PENAEID-PRAWN SPECIES, PENAEUS-OCCIDENTALIS ANDPENAEUS-STYLIROSTRIS (DECAPODA, PENAEIDAE), IN GOLFO-DE-NICOYA, COSTA-RICA

Analysis on the maturation rate, growth, mortality, selection patterns , recruitment and yield (Y/R) and biomass (B/R) per recruitment of P. occidentalis and P. stylirostris in the lower Golfo de Nicoya (Puntare nas, Costa Rica) was undertaken using a length frequency analysis. Res ults showed that this stock is similar to the one studied in the inner part, as for their maturation and growth parameters. High values of t otal mortality and exploitation rate were obtained, which indicate tha t these stocks are overexploited. The analysis of Y/R and B/R showed a n overexploited penaeid stock with a very low renewal rate.