The reproductive cycles of two subspecies of purple-faced langurs (Presbytic senex) with relation to environmental factors.
D000818:Animals; D002940:Circadian Rhythm; D004777:Environment; D004781:Environmental Exposure; D005260:Female; D005502:Food; D000882:Haplorhini / Q000502:physiology*; D008297:Male; D011247:Pregnancy; D012098:Reproduction; D012621:Seasons; D012726:Sexual Behavior, Animal; D013696:Temperature; D014197:Trees; D014887:Weather