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A report of the 21st Northeast Regional Stock Assessment Workshop. Influence of temperature and depth on distribution and catches of yellowtail flounder, Atlantic cod, and haddock in NEFSC bottom trawl surveys
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1996
[PDF-575.86 KB]
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Alternative Title:Influence of temperature and depth on distribution and catches of yellowtail flounder, Atlantic cod, and haddock in NEFSC bottom trawl surveys
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Description:"The continental shelf of the Northwest Atlantic is a heterogeneous land mass broken by numerous banks, basins, canyons and ledges. The hydrography overlying the shelf of this region is complex due to interactions between the bottom topography and mixture of water masses of varying temperature and density. A shelflslope water front is a permanent thermal structure, continuous at about the 100 m contour, along the entire shelf break from the Middle Atlantic Bight to Nova Scotia (Butman and Beardsley 1987). Along with other local features including substrate type and prey, temperature and depth are recognized to be important ecological determinants of fish distribution (Mahon and Smith 1989, Gabriel 1992). Off the northeast coast of North America the distribution of many demersal fishes has been correlated with bottom temperature and depth (Overholtz and Tyler 1985, Mahon 1985, Murawski and Finn 1988, Perry and Smith 1994). Furthermore, particular groups or assemblages of species have a tendency to co-occur, or exhibit a "preference" for particular habitat types (Murawski and Finn 1988, Gabriel 1992). In this paper, we examine the influence of temperature and depth on the distribution and catches of yellowtail flounder, cod and haddock in NEFSC spring and autumn bottom trawl surveys during 1963-1994"--Introduction.
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Rights Information:CC0 Public Domain
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