Alternative Harvest Control Rules For Multi-Fleet and Multi-Species Tuna Fisheries under Data-Poor Conditions in Eastern Indonesia

摘要

Indonesian tuna fisheries are complex due to variation in the scale and size of fleet in the fisheries, the highly dispersed distribution, and their multi-species nature. Moreover, there are large problems with data collection. Like many developing-country fisheries, their management needs to consider many other goals besides rents maximization, such as the distribution of rents and the stability of income and employment. This study evaluates the performance of alternative harvest control rules by means of a stochastic bio-economic model integrating the characteristics of three different scales of fishing and two tuna species. We focus on skipjack (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares) fisheries in the eastern Indonesia in small-scale (SSF), medium-scale (MSF), and large-scale fisheries (LSF). We combine the dynamics of an age-structured production model and the economic performance of fishing activity. In this study, simulation of management strategy evaluation (MSE) consistsof 5 years simulation for operating model and continue with 25 years of projection alternative harvest control rules (HCRs). We use monitoring data of effort and catch per unit effort (CPUE) to decide the allocation of effort in numbers of vessels in the next year.