The grey mullet have been regarded as the treasure, so it is the very precious fishery resource in Taiwan. However, from the historic catches, it showed the amount of the grey mullet is decreasing every year and the reasons are not only influenced by the climate change, but also the catches from the vessels of PRC. The main purpose of the study is the effects of the implementation on individual transferable quota of the cross-strait in grey mullet to the living of fishers in Taiwan. Through the management of quota, it would prevent the phenomenon of biological overfishing and economic overfishing, and achieve the sustainable development of fishery resources. The article is to study about the effect of the restrictions on the purchase of unit quota and different quota ceiling to the both of buyers and sellers. The results showed that when the restrictions on the purchase of the unit quota, this would may have the amount of vessels cut to the half and prevent the economic overfishing. Because of quota trading, this will make the fishers are willing to exit the fishery and to achieve the purpose of the management of ITQ.

abstract: The coastal fishing community of Barrington, Southwest Nova Scotia (SWNS), has depended on the resilience of ocean ecosystems and resource-based economic activities for centuries. But while many coastal fisheries have developed unique ways to govern their resources, global environmental and economic change presents new challenges. In this study, I examine the multi-species fishery of Barrington. My objective was to understand what makes the fishery and its governance system robust to economic and ecological change, what makes fishing households vulnerable, and how household vulnerability and system level robustness interact. I addressed these these questions by focusing on action arenas, their contexts, interactions and outcomes. I used a combination of case comparisons, ethnography, surveys, quantitative and qualitative analysis to understand what influences action arenas in Barrington, Southwest Nova Scotia (SWNS). I found that robustness of the fishery at the system level depended on the strength of feedback between the operational level, where resource users interact with the resource, and the collective-choice level, where agents develop rules to influence fishing behavior. Weak feedback in Barrington has precipitated governance mismatches. At the household level, accounts from harvesters, buyers and experts suggested that decision-making arenas lacked procedural justice. Households preferred individual strategies to acquire access to and exploit fisheries resources. But the transferability of quota and licenses has created divisions between haves and have-nots. Those who have lost their traditional access to other species, such as cod, halibut, and haddock, have become highly dependent on lobster. Based on regressions and multi-criteria decision analysis, I found that new entrants in the lobster fishery needed to maintain high effort and catches to service their debts. But harvesters who did not enter the race for higher catches were most sensitive to low demand and low prices for lobster. This study demonstrates the importance of combining multiple methods and theoretical approaches to avoid tunnel vision in fisheries policy. / Dissertation/Thesis / Ph.D. Environmental Social Science 2014