Yield-per-recruit and relative mean biomass estimates, and their management consegences, to the penaeus indicus fishery in the Gulf of Masirah

Abstract EN

The von ~ growth parameters estimated based on the 1990/91 carapace length data of Penaeus indicus from the Gulf of Masirah, Oman were used to calculate total mortality, yield-per-recruit (i.e., average weight of a shrimp from a cohort under a given fishing pattern) and relative mean biomass (i.e., exploited cohort biomass over ' cohort biomass) for the population sampled.

The instantaneous total mortality coefficient value indicated under exploitation in 1990/91.

When different fishing seasons scenarios were considered with the current total mortality level, but with a range of natural mortality values, high yield - per- recruit and relative mean biomass values were shown for ~ and November-April fishing seasons.

The fishing season is currently late August to end of April.

Thus, a one to two-month delay in the fishing season appears to be beneficial to this fishery.