External Factors and Ovarian Activity in Mammals

摘要: Publisher Summary This chapter discusses the experimental approaches that attempt to isolate, define, and specify nature of environmental variables alter ovarian functions. Under natural conditions, even under some ones, an animal is subject combinations changes in different parameters its environment. The majority mammals living temperate climates breed only part year. Many insectivores, carnivores, nonruminating ungulates, rodents spring. Fewer species—such as deer, sheep other ruminants, badgers, seals, primates—breed autumn. Some species all year round show annual fluctuations fertility. Domestication associated with loss pronounced breeding season characterizes wild population. also neural pathways linking environment activity case specific discrete stimuli, such those provided by light, smell, or coitus.