Sexual imprinting: Variables influencing the development of mate preference in Coturnix coturnix japonica

It has been demonstrated in a number of species that species-typical mate preference is affected by early social experience. This study extends the understanding of variables within the sensitive period that influences the development of mate preference in Coturnix coturnix japonica. Hatchlings were individually given 5-day exposure to a normal hen at five different age levels during the first 25 days posthatch. For purpose of control all experimental subjects were exposed to an albino hen for the 20-day period in which they were not exposed to the normal hen. Starting on day 45 all subjects were given a series of 10 mate-choice tests between an albino and normal hen. The data indicate that, first, at any of the age levels examined more than 5 days of social experience is required for the development of reliable mate preference for the normal. Second, the duration of treatment during the sensitive period is an important influence on mate preference. Finally, the sensitive period is nonhomogenous. The first 5 days are the most valuable.