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Cod and haddock spawning on Georges Bank in relation to water residence times |
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| Authors: | F H Page M Sinclair C E Naimie J W Loder R J Losier P L Berrien & R G Lough |
| Institution: | Fisheries and Oceans Canada, Biological Station, St Andrews, NB, Canada E0G 2X0,;Fisheries and Oceans Canada, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, NS, Canada B2Y 4A2,;Dartmouth College, 8000 Hinman, Hanover, NH, USA 03755,;National Marine Fisheries Service, Sandy Hook, NJ, USA,;NOAA, National Marine Fisheries Service, Northeast Fisheries Science Center, Woods Hole, MA, USA 02543 |
| Abstract: | The seasonal and geographical patterns of spawning for Georges Bank cod ( Gadus morhua ) and haddock ( Melanogrammus aeglefinus ) are estimated using composite distributions of stage I eggs derived from the Marine Resources Monitoring, Assessment and Prediction (MARMAP) data set (1977–1987). The inferred mean spawning locations are compared with patterns in particle residence times derived from a three-dimensional prognostic circulation model that estimates the tidal and seasonal mean circulation. The comparisons indicate that cod and haddock spawning occurs at times and locations characterized by model residence times in excess of 35 d. The results are discussed in the context of fish population regulation theory, particularly the member/vagrant hypothesis and the concept of abundance-dependent vagrancy. |
| Keywords: | circulation model cod eggs Georges Bank haddock residence time spawning |