Deep-water fisheries of the North Atlantic oceanic slope : - download pdf or read online

By Alan G Hopper

ISBN-10: 0792335112

ISBN-13: 9780792335115

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Read Online or Download Deep-water fisheries of the North Atlantic oceanic slope : [proceedings of the NATO Advanced Research Workshop on Deep-Water Fisheries of the North Atlantic Oceanic Slope, Hull, U.K., March 1 - 4, 1994] / [...] XD-US PDF

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Additional resources for Deep-water fisheries of the North Atlantic oceanic slope : [proceedings of the NATO Advanced Research Workshop on Deep-Water Fisheries of the North Atlantic Oceanic Slope, Hull, U.K., March 1 - 4, 1994] / [...] XD-US

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Deep Water Fisheries ofthe North Atlantic Oceanic Siope, Kluwer Academic Publishers, Dordrecht. deYoung, B. and Rose, GA (1993) 'On recruitment and distribution of Atlantic cod (Gadus morhua) off Newfoundland', Canadian Journal of Fisheries and Aquatic Science, 50, 2729-2741. V. 1. (1987) 'The intraspecific structure of the roundnose grenadier, Coryphaenoides rupestris Gunnerus, in the North Atlantic: variability in local groups and conditions for their forming', Voprosy Ikhtiologii, 5,784-793.

Declines in catch rate were c1ear in the demersal species - Greenland halibut, cod and roundnose grenadier - but were just as apparent in the more pelagic redfish (Fig. 5). The less abundant species on the upper slope, but nonetheless ranking species and not yet the subject of directed fisheries, remained at about the same catch level throughout the time series (Fig. 7). , 1993). Even so, the catch rates for the upper slope species were not flat, but seem to show a periodicity of sorts. There is no ready explanation for this, but in this context it is worth noting a study of cycles in the California Dungeness crab fishery.

When such comparisons are made, the presence quite often of a few widespread and dominant forms diverts attention from the fact that many of the less abundant species are quite restricted in their distribution (Haedrich and Merrett, 1990). On the sma1ler mesoscale of banks and eddies (100's of km), the criterion of comparability seems to be met. Species lists are very similar, and the distribution patterns of individual species overlap broadly. In the fisheries data, the only datasets where faunal composition over time are available, stability and persistence over at least a few generations are characteristic of assemblages identified on those scales (Overholtz and Tyler, 1985; Gabriel, 1992; Gomes, 1993).

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Deep-water fisheries of the North Atlantic oceanic slope : [proceedings of the NATO Advanced Research Workshop on Deep-Water Fisheries of the North Atlantic Oceanic Slope, Hull, U.K., March 1 - 4, 1994] / [...] XD-US by Alan G Hopper


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