To study the possibility of producing Muscovy drake*Pekin duck crosses, the authors monitored the fertility of the egg obtained in natural mating for one year. A total of 16 Muscovy drakes and 40 Pekin ducks were reared in outdoor pens with two different male/female ratio, 1:2 and 1:3. The results showed significant differences between egg fertility of the two male/female ratio (1:2 =72.9% and 1:3 =58.1%, P<0.01). The egg fertility decreased with laying time (P<0.01). The observation of the reproductive behaviour showed a strong resistance of the Pekin duck against the repeated attempts of rape particularly in flocks with male/female ratio 1:3.
Effetto del diverso rapporto maschi/femmine sulla produzione del mulard.
PACI, GISELLA;MARZONI FECIA DI COSSATO, MARGHERITA;BAGLIACCA, MARCO
1991-01-01
Abstract
To study the possibility of producing Muscovy drake*Pekin duck crosses, the authors monitored the fertility of the egg obtained in natural mating for one year. A total of 16 Muscovy drakes and 40 Pekin ducks were reared in outdoor pens with two different male/female ratio, 1:2 and 1:3. The results showed significant differences between egg fertility of the two male/female ratio (1:2 =72.9% and 1:3 =58.1%, P<0.01). The egg fertility decreased with laying time (P<0.01). The observation of the reproductive behaviour showed a strong resistance of the Pekin duck against the repeated attempts of rape particularly in flocks with male/female ratio 1:3.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
