正在加载图片...
Types of Survivorship Curves 100 。 1000 10 (a) The Dall sheep is a 210,00 large mammal that 1000 produces relatively few 0123456785 young. Most of the young Age(years) survive. and more susceptible to predation (b) The curve shown for the white-crowned and disease 20 sparrow is typical of that Age (years) for many kinds of birds After a period of high (c) Many small animals mortality among the and plants produce enormous numbers of young the mortality rate is about equal fro all ages offspring. Mortality is very of adult birds high in the younger individuals and few dividuals reach old ageTypes of Survivorship Curves Types of Survivorship Curves (a) The Dall sheep is a large mammal that produces relatively few young. Most of the young survive, and more susceptible to predation and disease. (b) The curve shown for the white-crowned crowned sparrow sparrow is typical of that for many kinds of birds. After a period of high mortality among the young the mortality rate is about equal fro all ages of adult birds. (c) Many small animals small animals and plants and plants produce enormous numbers of offspring. Mortality is very high in the younger individuals, and few individuals reach old age
<<向上翻页向下翻页>>
©2008-现在 cucdc.com 高等教育资讯网 版权所有