Do high-fertile species have a high mortality rate?

People are the classic example of a slow growing species that doesn't have many offspring. Other examples include apes, whales, and elephants. It is mathematically necessary for high-fertile species to have high mortality. read more

Well, if a species was very fertile but didn't have a high mortality rate, it would soon overpopulate, and because of the lack of resources, the population would plateau and then start to decline, which would indicate a high mortality rate. read more

mortality rates observed during the period from January 1, 1998 to December 31, 2003. Rather than following an actual cohort of births throughout life, a period life table follows a synthetic cohort of births and assumes that they are subject at each age to the age-specific death rates observed during a particular period (Preston et al., 2001). read more

Analyzing birth rates, death rates, immigration rates, and emigration rates is fundamental to demography: the study of factors that determine the size and structure of populations through time. To predict the future of a population, biologists have to know the population's age structure. read more