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Fertility from natural matings influenced by social and physical environments in multiple-bird cages.

Various social and physical environments were tested for effects on fertility using three White Leghorn strains in multiple-bird cages. Familiarizing breeder males with the cage environment before introducing females had no appreciable effect. Area per bird (560 vs. 1130 cm.-2) and cage height (40 vs. 80 cm.) were not detected as significant variables. Firmer wire flooring and previous mating experience of males appeared to confer advantages in establishing fertility.