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Free Content The influence of Gulf Stream warm core rings on recruitment of fish in the northwest Atlantic

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The a priori hypothesis that entrainment of shelf water by warm core rings reduces recruitment of marine fish stocks through offshore transport is tested. Weekly satellite images for 1973 through 1986 are used to generate time-series of the positions and numbers of warm core rings and the locations of the shelf-slope front from the mid-Atlantic Bight to the Grand Banks. These data are combined with estimates of the timing of the spawning and the duration of larval stages to create stock-specific annual indices of ring activity and shelf-slope front variability. There is evidence that increased warm core ring activity reduces recruitment in the 17 ground fish stocks examined, with the exception of cod from Georges Bank. A similar analysis of 7 pelagic stocks and one shellfish stock showed no consistent evidence that warm core rings reduce their recruitment; however, the recruitment data for many of these pelagic species are less reliable than for the groundfish stocks.

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Document Type: Research Article

Publication date: 1989-08-01

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  • The Journal of Marine Research publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. In the area of biology, studies involving coupling between ecological and physical processes are preferred over those that report systematics. Authors benefit from thorough reviews of their manuscripts, where an attempt is made to maximize clarity. The time between submission and publication is kept to a minimum; there is no page charge.
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