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Science 20 July 1979:
Vol. 205. no. 4403, pp. 267 - 277
DOI: 10.1126/science.205.4403.267
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Articles

Management of Multispecies Fisheries

Robert M. May 1, John R. Beddington 2, Colin W. Clark 3, Sidney J. Holt 4, and Richard M. Laws 5

1 Professor in the Biology Department, Princeton University, Princeton, New Jersey 08540
2 Lecturer in the Biology Department, University of York, Heslington, York, Y01 5DD, England
3 Professor in the Mathematics department, University of British Columbia, Vancouver V6T IW5, Canada
4 Adviser on marine affairs to the Fisheries Department, United Nations Food and Agriculture Organization, Via delle Terme di Caracaila, 00100 Rome, Italy
5 Director of the British Antarctic Survey, Madingley Road, Cambridge, CB3 OET, England

With the overexploitation of many conventional fish stcocks, and growing interest in harvesting new kinds of food from the sea, there is increasing need for managers of fisheries to take account of interactions among species. In particular, as Antarctic krill-fishing industries grow, there is a need to agree upon sound principles for managing the Southern Ocean ecosystem. Using simple models, we discuss the way multispecies food webs respond to the harvesting of species at differrent trophic levels. These biological and economic insights are applied to a discussion of fisheries in the Southern Otean and the North Sea and to enunciate some for harvesting in multispecies systems.


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