Modelling advection of cod eggs and larvae on the Newfoundland Shelf |
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Authors: | FRASER J. M. DAVIDSON BRAD DEYOUNG |
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Affiliation: | Department of Physics, Memorial University of Newfoundland, St John's, Newfoundland, Canada A1B 3X7 |
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Abstract: | We investigate interannual variations in dispersion for the drift and retention of cod eggs and larvae on the Newfoundland Shelf using a two-dimensional Lagrangian tracking model. The velocity field for the drift model is obtained from a diagnostic calculation of objectively analysed density data. Time-dependent currents are generated using an inertial-current slab model driven by observed winds. Eggs and larvae are treated as passive drifters seeded in a dispersion model of the Newfoundland Shelf region. We identify favourable and unfavourable zones of retention on the Newfoundland Shelf. We show that northerly, shelf-break spawning locations are more favourable than southerly shelf-break spawning locations for northern cod, ( Gudus morhua , in NAFO divisions 2J3KL). |
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Keywords: | cod (Gudus morhua) egg and larval drift Newfoundland Shelf Lagrangian tracking |
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