Use of a stochastic model of a calving distribution for beef cows for formulating optimal natural mating strategies

accouplement anoestrus beef cattle bovin de boucherie calving interval ciclo estral conception rate copulation cows cycle oestral date ganado de carne gestation period intervalle entre parturition intervalo entre partos mathematical models mating mating systems oestrous cycle parto parturition parturition interval performance de reproduction reproductive performance reproductividad sistemas de apareamiento statistical methods stochastic models temps tiempo time vaca vache