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Journal of Experimental Biology 57,693-700 (1972)
Published by Company of Biologists 1972

Brightness Discrimination in Larvae of Plaice and Sole

J. H. S.BLAXTER 1

1 Dunstaffnage Marine Research Laboratory Oban, Argyll

The brightness discrimination of larvae of plaice and sole was tested by subjecting them to a choice of moving phototactically to one of two horizontally opposed light sources.

At higher light levels, above 100-10-1m-candles, they moved to the brighter of the two lights; below 10-1-10-2 m-candles they moved to the dimmer.

Brightness discrimination, expressed as the increment ({Delta}I) discriminated as a percentage of the dimmer light (I) (the Weber fraction), was of the order of 60-200%.

Submitted on March 27, 1972






© The Company of Biologists Ltd 1972