THE HEARING OF FISH.
SOUNDS WHICH CAUSE FEAR.
Experiments have been conducted by Mr. J. Berryman with a view to ascertaining how far noisy anglers handicap themselves. He found that a gun fired at 200 yds. immediately put a trout off his feed; at 100 yds. it made him clearly excited; and at 20yds. made him rush about and then come to a dead standstill in a state of acute suspicion.
A second gun at 20yds. drove him to shelter under the bank. However, fishermen rarely announce their approach with fusillades. More important is the obviously alarming effect of a dry twig snapped on the bank and of a spade beaten on the turf, which was audible for 50yds. A policeman's whistle, produced comparatively little perturbation. The experiments go to show that fishes are acutely sensitive? to such sounds as are likely to indicate enemies 'on the bank, and immediately on hearing them put themselves on the qui vive or even take refuge in their rock and root sheltered haunts.
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New Zealand Herald, Volume LIX, Issue 18281, 23 December 1922, Page 2 (Supplement)
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170THE HEARING OF FISH. New Zealand Herald, Volume LIX, Issue 18281, 23 December 1922, Page 2 (Supplement)
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