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. 1975 Nov;23(4):926-31.
doi: 10.1016/0003-3472(75)90116-5.

Effects of testosterone propionate on the social behaviour of groups of male comestic ducklings Anas platyrhynchos L

Effects of testosterone propionate on the social behaviour of groups of male comestic ducklings Anas platyrhynchos L

J Balthazart et al. Anim Behav. 1975 Nov.

Abstract

One-month old testosterone-injected ducklings were observed in groups of three males and their social behaviour compared to that of oil-injected control birds. Most elements of adult sexual behaviour and one pattern of aggressive behaviour (chest fight) occurred more frequently in the experimental animals. It was shown that the same hormonal treatment induces different behavioural responses in different animals. Unlike previous studies, no social displays were observed in the testosterone-injected ducklings. Possible explanations of this fact are discussed.

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