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Presently, the typical tools using for white shrimp fishing are shrimp trap and floating trawl. Both of them can cause the economic losses due to the improper size of caught shrimps particularly via the shrimp trap. This significantly impacts on a huge reduction of shrimps in natural sources. Hence, the purposes of this study are to examine the economic losses and benefits of white shrimp fishing and to compare the effective usefulness of both fishing tools. The data have been collected through interviewing and field recording of caught shrimps in terms of quantity and average weight of caught shrimps in each round. Shrimp fishermen in Hat-Samran Sub-district, Hat-Samran District, Trang Province have been selected as purposive samples. The concept of opportunity costs, production costs, and returns have been adopted to measure the economic losses and benefits. The findings revealed that shrimp fishing by shrimp trap triggered to economic losses or opportunity costs of the improper size of shrimps fishing in value of 31,374.00 Baht/round, whilst those of the losses via floating trawls cost 24,975.00 Baht/round. When taking the production costs and returns into the consideration, it could be seen that shrimp fishing thru floating trawl was higher worthiness than that of shrimp trap. Therefore, policy makers who oversee the shrimp fishing in that area have to educate and notice fishermen the effectiveness and usefulness of shrimp fishing via floating trawls in order to replace shrimp trap by floating trawl and to obtain sustainable mode of shrimp fishing.
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