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Baby Lab

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Optomotor test for wavelength sensitivity in guppyfish (Poecilia reticulata).

Used a new procedure in measuring the optomotor response of wild-type vs store-bought guppyfish to determine the fish's wavelength sensitivity. The relative sensitivity of guppies to red, green and blue was measured by observing the optomotor following responses that the fish made to apparent motion in a special computer-generated display. The S's response was scored by an O looking through the aperture at the top of the tank. Frames T1 and T3 were gratings of red and green stripes, and frames T2 and T4 were gratings of light and dark yellow stripes. Results showed that the wild-type Ss needed the least green to match the fixed red, showing that they were the most sensitive to green, and were even more sensitive to blue. The findings suggest that there are different degrees of green and blue sensitivity in store-bought vs wild-strain guppyfish. (PsycINFO Database Record (c) 2007 APA, all rights reserved)



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