Detection potential fishing zones of longtail tuna (Thunnus tonggol) using fisheries catch and remotely sensed data in the waters around Madura Island

PI: Achmad Fachruddin Syah,
Institution: University of Trunojoyo Madura

Project Overview:

Longtail tuna, Thunnus tonggol, is an economically important pelagic species inhabiting tropical andsubtropical provinces of the Indo-Pacific region (Froese andPauly, 2010). Most studies of age and growth have been undertaken in regions where there are significant commercial longtail tuna fisheries. However, integrated the fishing location together with habitat and environmental modeling, have not been done to predict the potential fishing zones for longtail tuna in waters around Madura Island, East Java. The catch data for longtail tuna will be obtainedfrom fisherman who undertaken longtail tuna in regions where there are significant commercial longtail tuna fisheries, such as waters around Madura Island.  They will use satellite-derived data—Chlorophyll-a concentration (Chl-a), sea surface temperature (SST), and sea-surface height (SSH)— as environmental factors in the maximum entropy models.

The relative contribution of individual environmental variables will examine by using the heuristic estimates of variable importance based on the increase in the model gain, which is associated with each environmental factor and its corresponding model feature. Response curves generated for each factor will examine to derive the favorable environmental ranges for potential fishing zones. This data can help us to detect potential fishing zone of longtail tuna.