The vulnerability of fish, crabs and prawns resources in the Mahakam Estuary

River estuary in coastal areas, is highly affected by inland water conditions such as freshwater and sediment flows, ocean water such as tides, waves, and the substitution of saltwater to land. Large ecological and economic potential causes logical consequences for ecosystem changes, including the condition of fish resources that have habitat and life cycles directly related to conditions that occur upstream. The purpose of this study was to examine ecological stresses and fishing activity in Mahakam Estuary represented by mangrove crabs, cat fish and giant prawns. The main analysis in this study was the calculation of vulnerability values with concepts and approaches to vulnerability of catfish populations, giant prawns and mangrove crabs, based on two functions of vulnerability, namely exposure and sensitivity. The vulnerability analysis of three types of fisheries commodities refers to the method used by NOAA with some modifications to the assessment component. It is known that catfish are in a low level of vulnerability, giant prawns are at a high level of vulnerability, mangrove crabs are in a very high level of vulnerability or very vulnerable.