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.
|Autori interni:||PACI, GISELLA|
MARZONI FECIA DI COSSATO, MARGHERITA
|Autori:||PACI G; MARZONI M.; BAGLIACCA M.|
|Titolo:||Effetto del diverso rapporto maschi/femmine sulla produzione del mulard.|
|Anno del prodotto:||1991|
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