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Part III. The Zooplankton-Herring Correlations in the Scottish Fisheries

Published online by Cambridge University Press:  11 May 2009

G. T. D. Henderson
G. T. D. Henderson
Affiliation:
Department of Zoology and Oceanography, University College, Hull.
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(1) In the Scottish Eastern and Western Fisheries 459 Plankton Indicator samples have been analysed and the results studied for evidence of correlations between the zooplankton and the 533 associated catches of herring. (See Part IV for the phytoplankton correlations.)

(2) In the Eastern Fishery, 1930-33, out of twenty half-month areaperiods considered of primary value, fifteen show positive Calanus-Herring correlations and five negative. The area-periods of secondary value confirm this three to one ratio, there being eight positive and three negative results indicated. (A three to one ratio was also found in the Shields Fishery. Part II.)

(3) An attempt to estimate the commercial value of the Indicator, when used to locate the richer Calanus waters, shows that if in each period (1931-33) the fishing had taken place in the richer Calanus waters a gain of 24-5 i 7 -7 % over the catch secured by fishing at random should have resulted.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 21 , Issue 1 , November 1936 , pp. 243 - 276
Copyright
Copyright © Marine Biological Association of the United Kingdom 1936

References

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