• 4734 views

    Lec 12 - Sex Allocation

    "Lec 12 - Sex Allocation" Principles of Evolution, Ecology and Behavior (EEB 122) Sex allocation is an organism's decision on how much of its reproductive investment should be distributed to male and female functions and/or offspring. Under most conditions, the optimal ratio is 50:50, but that can change under certain circumstances. Sex allocation determines what sexes sequential hermaphrodites should be at each part of their life as well as how simultaneous hermaphrodites should behave. Some species have more control over the sexes of their offspring than others, and adjust the sex ratios of their offspring depending on the environment and conditions. 00:00 - Chapter 1. Introduction 02:16 - Chapter 2. Shaw-Mohler and Male-Female Fitness Equivalency 10:00 - Chapter 3. Sex Ratios 18:39 - Chapter 4. Sequential Hermaphrodites 32:44 - Chapter 5. Sex Assignment in Offspring 43:48 - Chapter 6. Summary and Conclusion Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Spring 2009.

    Video is embedded from external source so embedding is not available.

    Video is embedded from external source so download is not available.

    Here is the next lecture for this course

    Watch NEXT
    LECTURE
    4766 views     Male and Female Foley Catheter Insertion

    Lec 13 - Sexual Selection

     46:07
    Lecture List | Course Details | Contents | Related

    No content is added to this lecture.

    Go to course:

    This video is a part of a lecture series from of Yale

    Lecture list for this course

    Lec 1 - The Nature of Evolution: Selection, Inheritance, and History

    Lec 2 - Basic Transmission Genetics

    Lec 3 - Adaptive Evolution: Natural Selection

    Lec 4 - Neutral Evolution: Genetic Drift

    Lec 5 - How Selection Changes the Genetic Composition of Population

    Lec 6 - The Origin and Maintenance of Genetic Variation

    Lec 7 - The Importance of Development in Evolution

    Lec 8 - The Expression of Variation: Reaction Norms

    Lec 9 - The Evolution of Sex

    Lec 10 - Genomic Conflict

    Lec 11 - Life History Evolution

    Lec 13 - Sexual Selection

    Lec 14 - Species and Speciation

    Lec 15 - Phylogeny and Systematics

    Lec 16 - Comparative Methods: Trees, Maps, and Traits

    Lec 17 - Key Events in Evolution

    Lec 18 - Major Events in the Geological Theatre

    Lec 19 - The Fossil Record and Life's History

    Lec 20 - Coevolution

    Lec 21 - Evolutionary Medicine

    Lec 22 - The Impact of Evolutionary Thought on the Social Sciences

    Lec 23 - The Logic of Science

    Lec 24 - Climate and the Distribution of Life on Earth

    Lec 25 - Interactions with the Physical Environment

    Lec 26 - Population Growth: Density Effects

    Lec 27 - Interspecific Competition

    Lec 28 - Ecological Communities

    Lec 29 - Island Biogeography and Invasive Species

    Lec 30 - Energy and Matter in Ecosystems

    Lec 31 - Why So Many Species? The Factors Affecting Biodiversity

    Lec 32 - Economic Decisions for the Foraging Individual

    Lec 33 - Evolutionary Game Theory: Fighting and Contests

    Lec 34 - Mating Systems and Parental Care

    Lec 35 - Alternative Breeding Strategies

    Lec Last - Selfishness and Altruism