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- Title
Complex migration routes of Atlantic bluefin tuna (Thunnus thynnus) question current population structure paradigm.
- Authors
Galuardi, Benjamin; Royer, François; Golet, Walt; Logan, John; Neilson, John; Lutcavage, Moliy
- Abstract
Movements of Atlantic bluefin tuna (Thunnus thynnus. ABFT) from specific western Atlantic forage grounds are not well described, and the extent of tbeir spawning areas is mainly surmised. In 2005 and 2006. we deployed 41 popup satellite archival tags (PSATs) on adult Atlantic bluefin tuna off the coast of Nova Scotia, Canada, and on Georges Bank. During the assumed spawning period, 56% of the tagged ABFT occupied a known spawning area, while 44% were located in distant oceanic regions. Assuming obligate annual spawning, these results are inconsistent with the notion of spawning site fidelity to the Gulf of Mexico. The ocean-wide migrations of adult ABFT tagged on a common forage ground suggest evidence of a metapopulation requiring more spatially explicit management than the current simple twostock structure.
- Subjects
FISH migration &; climate; BLUEFIN tuna; FISH populations; SPAWNING; FORAGE fishes
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2010, Vol 67, Issue 6, p966
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/F10-033