Abstract
Two lines of investigation have led to the experiment described here. A large body of data has been gathered on the preference behaviour of animals presented with a choice between saline solutions of various concentrations and distilled water. Most species studied seemed to manifest a preference for saline solutions of low (hypotonic) concentration and an aversion to solutions of higher (hypertonic) concentration1,2. A much less thoroughly investigated problem arises from the recurrent but apparently little-known observation that darkly pigmented animals have greater taste sensitivity than their lightly pigmented conspecifics.
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References
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WOLF, G., LAWRENCE, G. Saline Preference Curve for Mice: Lack of Relationship to Pigmentation. Nature 200, 1025–1026 (1963). https://doi.org/10.1038/2001025a0
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DOI: https://doi.org/10.1038/2001025a0
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