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Chemical Senses 2: 121-128,
© 1976

research-article

QUININE HYDROCHLORIDE ACCEPTABILITY AFTER WATER DEPRIVATION IN GALLUS DOMESTICUS

MICHAEL J. GENTLE

Agricultural Research Council's Poultry Research Centre King's Buildings, West Mains Road, Edinburgh EH9 3JS, Scotland

The latency to peck and show the oral aversion response was measured when 6 Brown Leghorn hens were presented with either water or 0.005 M quinine hydrochloride (QHCl) after either 2, 4 or 6 h water deprivation. The absence of any differences in the latencies to peck at water with the 3 deprivation schedules indicated no significant increase in the level of motivation, whereas, it was found that the latencies to peck at the quinine solution were significantly reduced with increasing deprivation. After 2 h deprivation the birds showed significantly longer latencies than with water but after 6 h deprivation there was no significant difference. By comparing the ratio values of the number of pecks followed by the oral aversion response divided by the total number of pecks given to the QHCl solution it was found that there was a significant decrease in this ratio from 2 to 6 h deprivation. It was suggested that the increase in acceptance of the quinine hydrochloride following deprivation may be due to changes in ‘taste’ sensitivity.


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