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Observations in the sea on the reaction to ultra-violet light of certain sound scatterers

Published online by Cambridge University Press:  11 May 2009

R. E. Craig  and
I. G. Baxter
R. E. Craig
Affiliation:
Scottish Home Department, Marine Laboratory, Aberdeen
I. G. Baxter
Affiliation:
Scottish Home Department, Marine Laboratory, Aberdeen
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Extract

Two experiments on the reaction to ultra-violet light of certain sound scatterers in the area are described.

The source was a 125 W. ultra-violet lamp.

The scatterers were detected using a Kelvin and Hughes recording echo-sounder, type 22.

The traces on both occasions were of the confused type caused by a number of different organisms, apparently lying between 20 and 60 m. and 8 and 30 m. respectively.

The responses of the different organisms to the ultra-violet light as shown by the components of the traces are described and their speeds of reaction calculated.

The types of organisms causing the traces are suggested.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 31 , Issue 2 , October 1952 , pp. 223 - 227
Copyright
Copyright © Marine Biological Association of the United Kingdom 1952

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References

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