Presentation - Gulf of Maine Research Institute

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Spawning cod in the Gulf of Maine Spawning site fidelity : 2009 Releases • Three of the seven fish tagged in 2009 returned to the spawning site in 2010 (43%). – Two of these same fish also returned in 2011. – One of which has also returned in 2012. • Documentation of extremely fine-scale (
Spawning cod in the Gulf of Maine Spawning site fidelity : 2010 Releases • A total of 15 of the 52 cod tagged in 2010 returned to the spawning site in 2011. Unadjusted rate of 29% • A total of 13 of the 52 cod tagged in 2010 were recovered in the fishery. 25% minimum fishing mortality rate 20% natural mortality • Adjusted rate of spawning site fidelity = 74% – Does not account for skipped spawning or tag failure rate, and includes a minimum rate of observed fishing mortality (tag non-reporting rate). • Residence times in 2011 ranged from 4 - 106 days (mean = 36 days). • At least four fish have returned in 2012 to confirm multi-year fidelity.
Page 1 and 2: Spawning site fidelity and fine-sca
Page 3 and 4: Stock structure in the Gulf of Main
Page 5 and 6: Fine-scale population structuring
Page 7 and 8: Spawning site fidelity of Atlantic
Page 9 and 10: Spawning cod in the Gulf of Maine
Page 11 and 12: Spawning cod in the Gulf of Maine
Page 13: Spawning cod in the Gulf of Maine
Page 17 and 18: Synthesis of Stock Structure • Th
Page 19 and 20: Acknowledgments • This research h
Page 21: References Runge JA, A Kovach, J Ch

Presentation - Gulf of Maine Research Institute

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