The objective of the program is to provide a basis for advancing science-based fisheries management for Atlantic bluefin tuna. Such advancement will depend upon improvements in understanding of the fisheries, total abundance, and biology of bluefin tuna, especially regarding the effects of mixing and movement between the eastern and western Atlantic populations. Contracting Parties to the International Commission for the Conservation of Atlantic Tunas (ICCAT), of which the U.S. is one, and other partners have embarked upon a multi-year research program on bluefin tuna as a step toward improving ICCAT's science-based management of Bluefin fisheries. Research sponsored under this funding opportunity represents a contribution to this partnership. Proposals that demonstrate collaborations with the ICCAT Atlantic Bluefin Tuna Research Program and other ICCAT partners are