ABSTRACT : The aim of this study was to analyze post-weaning reproductive performance of Large White sows in relation toseason, parity and their lactation performance under tropical conditions in Guadeloupe (French West Indies, 16° Lat. N, 61° Long. W.).This work was based on data recorded in the experimental unit of INRA from January 1993 to December 2003. Two seasons weredetermined a posteriori from climatic parameters recorded continuously in a station close to the experimental unit. Mean ambienttemperature was higher during the hot season than the warm season (26°C vs. 24°C) but relative humidity was comparable for bothseasons (i.e. 87% on average). Season had a significant effect on all reproductive parameters analyzed. Primiparous sows weaned in thehot season had a higher probability of a prolonged weaning to estrus interval, WEI (odds ratio was 4.1; p<0.01) but multiparous sowswere not affected. A higher probability of a prolonged weaning to conception interval, WCI (odds ratio >2.5, p<0.01) and a lowersubsequent farrowing rate (-10%, p<0.01) were found for sows weaned in the hot season. A higher daily feed intake during lactationreduced the probability of a prolonged WEI (p<0.05). Body weight and average back-fat thickness at farrowing affected
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