PUTTING AN END TO THE TRAGEDY OF RANCHING IN NAPOLEON WRASSE FISHERY IN INDONESIA: A SOCIOLOGICAL APPROACH

This study aims to look into Napoleon wrasse ranching in Anambas Islands Regency. Historically, the society in Anambas Islands has been socially constructed an unsustainable view of exploiting marine resources. In Napoleon wrasse fishery, overfishing has played a significant role in the loss of its populations. Due of the lack of adult Napoleon wrasse stock in marine ecosystem, larvae despite its high mortality rate are also sought as ranching target. It is found a tremendous amount of larvae are wasted in ranching period due low survival capacity to adapt to a caged ecosystem, so that the effectiveness of larvae ranching is questianable. Larvae fishing has become the object of the tragedy of the commons, whereas this particular activity plays an important role in the fishery. As a result, conservation and management have never been more important. The reflection to establish sustainable view is seen from discussion between Agent-Structure theory by Bourdieu and Agent-Network Theory by Latour. Local capacity to perform Locally Managed Marine Areas (LMMA) created major initiatives in delivering sustainable coral reef ecosystems which also form a natural environment of Napoleon wrass

Fishery management under poorly known dynamics

International audienc

Fishery management under poorly known dynamics

Adapting fishing regulations in a highly uncertain environment remains a complex challenge for managers who have to deal with non-linear dynamics of fish population and harvest levels. In this research, a recent method of stochastic control is adapted to a general fishery management problem under multiples sources of uncertainty related to the dynamics of the fish population and the effect of fishing on its growth. The question is about adjusting permanently the management rule or to hold a fixed policy thus avoiding additional noise. The mathematical problem developed here, though oversimplified, represents an original approach to the fishery management issue inspired by the monetary policy challenge of a central bank (Brainard principle). It assumes that Control Variation Increases the level of Uncertainty (namely CVIU approach) under particular conditions, resulting in preferable inaction regions for managers. We specify these conditions to show that the management of a poorly known fishery is still possible by using a CVIU approach2791242257French research ANR program "CIGOEF"French National Research Agency (ANR) [ANR-17-CE32-0008