References of "Zeitschrift für Tierpsychologie"
     in
Bookmark and Share    
Peer Reviewed
See detailEffects of androgens and oestrogens on the behaviour of chicks in an imprinting situation.
Balthazart, Jacques ULg; de Rycker, C.

in Zeitschrift für Tierpsychologie (1979), 49(1), 55-64

The behavioural effects of testosterone propionate (TP), 5alpha-dihydrotestosterone (DHT) and oestradiol benzoate (OB) were investigated in day-old chicks during imprinting sessions to a duck model. TP ... [more ▼]

The behavioural effects of testosterone propionate (TP), 5alpha-dihydrotestosterone (DHT) and oestradiol benzoate (OB) were investigated in day-old chicks during imprinting sessions to a duck model. TP increased the duration of peeping while inhibiting the following reaction and the twitters. DHT had more or less the same effects while OB induces the reverse behavioural changes. The behavioural effects of hormone injections agree with behavioural sex differences observed in non-injected animals: males peep more than females which on the other hand produce more twitters. This could be related to sex differences in the hormonal status of the birds at hatching, as it is known that during incubation male chick embryos have higher plasma testosterone levels than females of corresponding ages. [less ▲]

Detailed reference viewed: 6 (0 ULg)
Peer Reviewed
See detailBehavioural and physiological effects of testosterone propionate and cyproterone acetate in immature male domestic ducks, Anas platyrhynchos.
Balthazart, Jacques ULg

in Zeitschrift für Tierpsychologie (1978), 47(4), 410-21

The behavioural and morphological effects of testosterone propionate and of the antiandrogen cyproterone acetate were studied in male domestic ducks. Testosterone was also measured by radioimmunoassay in ... [more ▼]

The behavioural and morphological effects of testosterone propionate and of the antiandrogen cyproterone acetate were studied in male domestic ducks. Testosterone was also measured by radioimmunoassay in the plasma of these birds to relate the behaviour to the actual circulating levels of hormone. Testosterone stimulates sexual behaviour but has few effects on social displays. There is no correlation between the individual variations of plasma testosterone and sexual behaviour. [less ▲]

Detailed reference viewed: 12 (0 ULg)