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Phosphate and Fisheries

Published online by Cambridge University Press:  11 May 2009

L. H. N. Cooper
L. H. N. Cooper
Affiliation:
Chemist at the Plymouth Laboratory
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Extract

Landings of the spurdog, Squalus acanthias, at Mevagissey reflect the changes in phosphate at the neighbouring International Hydrographic Station Ei.

It is suggested that commercial landings of rays and skates ought to follow major changes in nutrient content of the overlying water with a time lag of some years. Fishery statistics for English Channel ports support this view. The dependence of the bottom in-fauna upon the fertility of the overlying water is also discussed.

Proposals to improve commercial fisheries by artificially fertilizing considerable areas of the open sea are critically examined. Such artificial enrichment is considered to be grossly uneconomic unless fishing becomes pisciculture in which weeding of unwanted algae and control of unwanted pests—competing predators and parasites—is undertaken.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 27 , Issue 2 , April 1948 , pp. 326 - 336
Copyright
Copyright © Marine Biological Association of the United Kingdom 1948

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