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Unformatted text preview: paternal kin! fathered Archie et al. 2007; Figures 1 and 2 13 Even time spent
c ourting & mating
K IN and NON KIN MORE time spent
c ourting & mating
w ith KIN Inbreeding
c ourting and
m ating KIN! 14 -There must be a way for the male to sense how closely related
t hey are to any given female
-Not only are males just avoiding direct siblings, but half siblings
t hrough their FATHER as well!
-(A male's father will go on to mate with OTHER females and
m ake OTHER baby females. The male ALSO shows choice
AGAINST these half sisters that he's NEVER even had contact
w ith) Observation: Some wolf populations in Canada
migrate, others don t Summary: Elephant Mating Behavior
• Male reproductive success is highly skewed, and should
create strong costs of inbreeding avoidance • Why might this be the case?
• Are these wolves different ecotypes? • Although males outweigh females (by 2x), females may
exhibit some choice and avoid mating with close
relatives. This is hard to assess. – Do they show genetic differentiation at neutral markers? • What ecological forces could lead to migration differences? • Despite these costs, males avoid inbreeding.
• Males compete strongly for mating; fights sometimes
even lead to death.
– Suggests fitness benefits of inbred offspring do not outweigh
costs of fighting for mating opportunities.
15 -Inbreeding cost is just too high to make it worth it to mate with a
relative. It is better to not mate at all
-Females may exhibit choice as well, but it is hard to assess
-Genetic analysis allows us to study populations like this one that
a re impossible to study in the lab
-GENETICS EXPLAIN BEHAVIOUR 16 -Here, BEHAVIOUR explains GENETICS
-Are the differences in migration behaviour mediat...
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- Winter '14
- Annotated Lecture S