LIFESCI 1 Chapter 46: CHAPTER46PopulationEcology
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Fig. shows the effects of overfishing on the age structure of a species of pacific rockfish, determined by comparing the ages of fish sampled in unfished waters with those in heavily fished waters. Human populations in affluent countries experience most mortality late in life, and so show a. The life history of an organism shows trade offs among physiological functions. population growth can be limited by resource availability. how an organism makes use of the resources that are available can also affect population growth. e ach individual must devote some of its available food and energy intake to growth, some to the maintenance of cells and tissues, and some to reproduction. this allocation is like a household budget, in which incoming resources are divided among the day to day expenses of acquiring food and paying for housing and transportation, meeting present and future medical and educational expenses, and savings held for emergencies.
