Factors of different management of Northern Atlantic bluefin tuna (Thunnus thynnus)

The International Commission for the Conservation of Atlantic Tunas (ICCAT) is a regional fisheries management organization (RFMO) comprised of over fifty cooperating states and fishing entities. It manages Northern Atlantic bluefin tuna (Thunnus thynnus) in the Atlantic Ocean and Mediterranean Sea. Due to overfishing and ineffective management, the stock abundance of this species has declined to about thirty percent of its unfished biomass in the Atlantic Ocean and Mediterranean Sea. Many publications point to this poor stock status as evidence of failed fisheries management. To maintain bluefin tuna stocks at a level that can support maximum sustainable yield (MSY), ICCAT has implemented unique tools to manage this important fishery, which is one of the oldest-recorded in the world.;In this thesis research, I examine the factors that contribute to the tools utilized to manage the fishery in the ICCAT Convention Area to shed light on why they are managed differently than other ICCAT stocks. To do this, I conducted a literature review on publicly available ICCAT reports, governmental and non-governmental documents, peer reviewed scientific literature, and other sources to understand and explain the relevant importance of each contributing factor to the management of the species. I utilized key informant interview methodology to obtain insights from twelve bluefin tuna experts representing a variety of interests that attend ICCAT official meetings. I transcribed and collected insights from semi-structured interviews, which I used to ground-truth the findings of the literature review.;No single factor is responsible for the unique management in place to govern ICCAT's bluefin tuna fishery. Rather, a nuanced interaction of many important factors contributes to the species' poor stock status and unique management. The history and complex nature of the fishery, unique biology of the species, strong demand in the world sushi market, impact of Illegal, Unreported, and Unregulated (IUU) fishing, and political will of ICCAT member countries to enforce Recommendations and Resolutions influence which measures are adopted and implemented. This finding contrasts peer reviewed literature and other information to the contrary that attribute the unique management and poor stock status of bluefin tuna to such factors as high market value of the species' meat, ineffective ICCAT management, Hardin's "Tragedy of the Commons," or the "free riding" of non-cooperating fishing entities fully.;Based on key informant interviews, expert respondents share a high level of agreement that the special, "iconic" status that bluefin tuna have attained in popular media, scientific publications, and in general public opinion are important factors that contribute to their management. Further, experts mostly agree that more scientific research on the biology and life history of the species needs to be conducted to inform more effective and appropriate management such as updating the current two-stock management framework. Experts recommend that ICCAT prioritize setting Total Allowable Catch (TAC) Recommendations based on the advice of their Standing Committee on Research and Statistics (SCRS) to sustain healthy stocks. This thesis research provides analyses of these various forces and the management context of the species, and shares recommendations for improving bluefin tuna management.