FISH RESEARCH
“Vermin fish,” a term which includes eels, dace,' loach, gudgeon, “miller’s thumbs ” and minnows, are not greatly appreciated by English anglers. The trouble is that these inferior fishes raid the spawning grounds of their betters and so create a scarcity. Mr John Berry, research officer of the Avon Biological Survey, has been making some novel experiments with coloured lights to determine whether certain colours arc antipathetic to the raiders, and so would act as a barrage. He made some highly interesting discoveries. Indigo blue is a deterrent to eels, but has no effect on the others; “miller’s thumbs.” loach and gudgeon found green annoying, but a greenish blue made “miller’s thumbs ” think they saw the bogey man. Unfortunately, they soon learn to associate a coloured light with food, and then they are both ready and willing to face the most hated hue.
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Bibliographic details
Otago Daily Times, Issue 22631, 24 July 1935, Page 7
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144FISH RESEARCH Otago Daily Times, Issue 22631, 24 July 1935, Page 7
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