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Mammalian survival curves typically illustrate three main types: Type I, Type II, and Type III. Type I curves, often seen in larger mammals like humans, show high survival rates in early and middle life, with a steep decline in older age. Type II curves, such as those of some birds and small mammals, depict a relatively constant mortality rate throughout life. Type III curves, common in species with high offspring numbers like many fish and amphibians, indicate high mortality in early life stages, with survivors living longer.

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