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The effect of group size and exposure pen area on boar-induced puberty in the gilt



The effect of group size and exposure pen area on boar-induced puberty in the gilt



Manipulating pig production II Proceedings of the Biennial Conference of the Australasian Pig Science Association APSA held in Albury, NSW on November 27-29, 1989: 307



Two batches, each of 48 Large White X Landrace crossbred gilts, were allocated to treatments in a 3 x 2 factorial design involving boar exposure in groups of 8, 4 or 2 gilts in large (22.2 msuperscript 2) or small (11.1 msuperscript 2) pens. Daily boar exposure occurred for 20 min (experiment 1) or 5 min (experiment 2) between mean gilt ages of 160 and 240 days. Interactions between the boar and gilts (defined as gilt's head being within 50 cm of the boar) were assessed in experiment 2.

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