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Reproduction in the gilt 4. the effect of rearing gilts with contemporary castrated males or intact on the attainment of puberty



Reproduction in the gilt 4. the effect of rearing gilts with contemporary castrated males or intact on the attainment of puberty



Animal Production 35(2): 171-176



Landrace .times. (Landrace .times. Large White) (66) gilts were allocated at 70 days of age to 1 of 3 rearing treatments of housing with gilts, contemporary castrated males or contemporary intact males. Half the experiment was completed in winter and half in spring. At 159 days of age all gilts were subjected to a change of pen and, from 160 days of age, daily exposure to mature vasectomized boars. The rearing treatments had a small but significant effect on the time interval from boar exposure to puberty, with gilts housed with gilts averaging 8.9 days to puberty compared with 7.1 days and 7.4 days for gilts housed with castrates and boars, respectively (P < 0.05). There was a seasonal effect on the time interval to puberty. Gilts receiving mature boar exposure during the winter months had a longer interval to puberty than gilts exposed to boars during the spring (8.8 days vs. 6.9 days; P < 0.01). No habituation effects of gilts housed with contemporary males was found but, the possibility of a slightly earlier induction of puberty was indicated.

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Accession: 006315762

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