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Ethology

Campbell Biology 9th Edition - Ch. 53 Population Ecology

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POPULATION ECOLOGY Chapter 53 Population = group of individuals of a single species living in same general area Density: # individuals / area Dispersion: pattern of spacing between individuals Introduction Determining population size and density: Count every individual Random sampling Mark-recapture method Patterns of Dispersal: Clumped ? most common; near required resource Uniform ? usually antagonistic interactions Random ? unpredictable spacing, not common in nature Additions occur through birth, and subtractions occur through death. Life table : age-specific summary of the survival pattern of a population Demography: the study of vital statistics that affect population size Survivorship Curve: represent # individuals alive at each age

AP Bio Chapter 51 Outline

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Chapter 51 Animal Behavior Lecture Outline Overview: Shall We Dance? ? Red-crowned cranes (Grus japonensis) gather in groups to dance, prance, stretch, bow, and leap. They grab bits of plants, sticks, and feathers with their bills and toss them into the air. ? How does a crane decide that it is time to dance? In fact, why does it dance at all? ? Animal behavior is based on physiological systems and processes. ? An individual behavior is an action carried out by the muscular or hormonal system under the control of the nervous system in response to a stimulus. ? Behavior contributes to homeostasis; an animal must acquire nutrients for digestion and find a partner for sexual reproduction.

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