Proceptive calling by female lion-tailed macaques

Abstract 10.1002/zoo.1430090605.abs During 6 years of monitoring breeding groups of lion-tailed macaques, it was discovered that females regularly emitted a non-copulatory vocalization during the follicular portion of the menstrual cycle. In the majority of cases females focused visually on a particular male when calling. Two-thirds of all calls were directed at males living outside the […]

Acute and chronic stress-like levels of cortisol inhibit the oestradiol stimulus to induce sexual receptivity but have no effect on sexual attractivity or proceptivity in female sheep

Stress-like levels of cortisol inhibit sexual receptivity in ewes but the mechanism of this action is not understood. One possibility is that cortisol interferes with the actions of oestradiol to induce sexual receptivity. We tested this hypothesis in 2 experiments with ovariectomised ewes that were artificially induced into oestrus by 12 days of i.m. injections of […]

Reducing mother-young separation distress by inducing ewes into oestrus at the day of weaning

The aim of this study was to determine whether or not oestrus induction on the day of weaning would reduce the distress experienced by ewes upon separation from lambs. For this, 43 ewes, their eight week-old lambs and six mature rams were used. Prior to weaning, 21 of these ewes were induced to display oestrus […]

Male mate preference is influenced by both female behaviour and morphology

Males of many species prefer females that are more fecund, novel and/or sexually receptive. Males assess the desirability of potential mates using female morphological traits, including size and sexual coloration, or olfactory cues. However, few studies have directly examined how female behaviour influences male mate choice, which is surprising because males often respond strongly to […]

Reduced proceptivity and sex-motivated behaviors in the female rat after repeated copulation in paced and non-paced mating: Effect of changing the male

The mating inhibition after repeated copulation (sexual satiety) and its re-commencement after changing the sexually active partner (Coolidge effect) are well recognized phenomena in males, but their occurrence in females is little explored. These two phenomena were compared in conditions when the female regulates copulation timing (pacing) and under non-paced mating. Female rats selected in […]