TOPIC_6_Kin_selection_in_humans_REV_2-12

TOPIC_6_Kin_selection_in_humans_REV_2-12 - Biology of Being...

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Unformatted text preview: Biology of Being Human TOPIC 6 Paul M. Bingham Joanne Souza "Kin-selected behaviors in humans" Key Terms and Concepts (see glossary in digital textbook): Genetic relatedness VERSUS Genetic identity Ultimate causation VERSUS Proximate causation Psychological devices or mechanisms Pedigree Social breeding Reproductive value Kin selection Conspecifics Conflict of interest 1 Lecture Outline: "Kin-selected behaviors in humans" I. Important refinements of kin-selection theory: Genetic relatedness is NOT the same thing as genetic similarity or identity II. Thinking like a gene III. Good science confirms kin-selection theory in detail IV. Some of the most basic and universal features of human breeding behavior are kin-selected V. Homicide statistics give us a uniquely powerful approach to testing kin-selection theory in humans A. "Homicide" by Daly and Wilson and the use of homicide statistics B. Beginning simply - adults killing adults and the ancestral human reproductive strategy C. Non-kin infanticide in humans D. Reproductive value a crucial concept E. Strategic killing of kin offspring 2 Key Images for TOPIC 6: Clan Bee Team (family) Bee Team (family) (BLUE) Blue Team (family) (CROSS) (SNAKE) (GREEN) (STRIPE) The clutch of three chicks in video (HEART) The pedigree of the actors in the Bee Team Video from lecture 3 public lives Human social behavior Animal social behavior private lives Genetic design information 4 Homicides per million persons per year 50 100 20 15-40 years old 5 males females Reproductive value 4 2 0 10 Age of female 20 30 40 50 Probability of infanticide by natural mother in Canadian population from 1974-1983 as a 1974function of maternal age Infanticides per million births 100 50 0 <19 25-29 25- maternal age Homicides per million children per year 30 20 10 0 0 2 Risk of homicide by a natural parent as a function of the child's age in Canada 1974-1983 4 6 8 10 12 14 16 Age of Child (yrs) 6 Risk of child being killed by stepparent and natural parent Natural Parent Stepparent 0 -2 6-8 12-14 0-2 6-8 12-14 Child's age (yrs) 70 60 Relative Risk 50 40 30 20 10 0 Relative risk of child being killed by step-parent and natural parent Child's Age (yrs) > 0-2 6 -8 7 12-14 Population at large Offenders Victims Percent not married 60 20 14-19 14- 20-24 20- 25-34 25- 35-44 35- 45-54 45- 55-64 55- Age in years Percent unemployed Population at large Offenders Victims 50 10 16-19 1620-24 2025-44 2545-54 4555-64 55>64 Age in years 8 ...
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