Abstract
The effect of low ambient temperatures on reproduction was determined by housing one group of 14 boars (av age 8.5 months) in a temperature controlled research piggery (17°C) and another group of 14 boars (av age 8.7 months) in outside pens. Semen was collected at 72-hr intervals for an 11-week period (January through March). The mean daily temperatures for January, February, and March were -18, -20, and -15°C, respectively.

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