10 46 births500 population 086 annual per capita birth

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Unformatted text preview: II Curve : curves are intermediate with a constant death rate over the organism’s life span (example: Belding’s Ground Squirrel) T ype III Curve : curve drops sharply at start, reflecting very high death rates for the young, but flattens out as the death rate declines for those few individuals that survive the early period of die-off (example: oyster) 6. The three basic variables that comprise the life history of a species are when reproduction begins, how often the organism reproduces, and how many offspring are produced during each reproductive episode. three variables of the life history of a species= when reproduction begins, how often they reproduce, how many offspring produced during each episode 7. Big-bang reproduction is when individuals produce a large number of offspring and dies- semelpority. 8. Semelpority = big bang reproduction; iteropority is when organisms produce only free offspring during repeated reproductive episodes. The critical factor is the survival rate of the offspring. Semelpority favored when survival of offspring is low/highly variable or unpredictable environments. Iteropority favored in dependable environments where competition for resources is intense 9. Limited resources mandate trade-offs between investment in reproduction and survival. 10. 46 births—500 population = .086 annual per capita birth rate 11. ^^ in 5 years—900 population—with same birth rate = 77.4 births 12. The value of per capita rate increase tells you the change in population size. 13. Population growth under ideal conditions is the exponential population growth; The r in this case is called rmax. 14. True, a population that is growing exponentially increases at a constant rate. 15. Equation for exponential growth: dN/dt=rmaxN 16. The type of growth curve that is characteristic of a population exhibiting exponential population growth is a J shaped curve. 17. The term carrying capacity (K) means the maximum stable population size that a particu...
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This document was uploaded on 03/02/2014 for the course BIO 109 at University of Missouri-Kansas City .

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