ANTB22H3 Lecture Notes - Lecture 9: Order Of Friars Minor Capuchin, Estrous Cycle, Fadd

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9 Apr 2011
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ANTB22 LEC 8
MARCH 17 2011
PROSIMIANS
UNIQUE LEMUR CHARATERISTICS
Sexually monomorphic
Cathemerality showing both diurnal and nocturnal activity patterns
Cannot predict when they will be active, tends to be a lemur trait (also seen in owl monkey)
SLIDE 2
Female dominance
trait shown by SOME of the lemur species
Targeted aggression
females attack other females, even their close relatives
REPRODUCTION IN LEMURS
total hormonal control of mating
chimps, or humans can have sex when preggers, lemurs cannot
no non-conceptive matings, as in other primates (Capuchins can mate whenever,
they can be non-ovulating)
STRICT SEASONAL REPRODUCTION IN LEMURS
For lemurs, reproduction is controlled by PHOTOPERIOD (# hrs exposed to daylight out
of a 24 hr period)
- start mating as daylight hours get shorter
In North America, reproduction is 6 mo. out of phase with the timing of events in
Madagascar
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FEMALE DOMINANCE- DEFINITION
The ability of all adult females to consistently evoke submissive behaviour from all males in dyadic agonistic
interactions
FEMALE DOMINANCE
Females do not become dominant to males until after their first breeding season
female dominance depends on the sexual maturity of the females…
when females are prepubescent, they cannot dominate males
adult females are dominant to males in all contexts: feeding, resting, mating, etc
OTHER ANIMALS THAT HAVE BEEN DESCRIBED AS FEMAL DOMINANT
Sons of the alpha female can be dominant over some group females
females show submission to males as they approach estrous
not the same as lemurs…not true fem dom like in lemurs
SLIDE 2
Other animals that have been described as female dominant
Bonobos (pygmy chimp)...but:
Certain females can dominate males in some groups, but not in all groups
sometimes the alpha animals of a bonobo group can be female, but not ALWAYS
not TRUE female dominance as in lemurs
TRUE FEMALE DOMINANCE EXISTS IN THE FOLLOWING LEMUR
ring tailed lemur
sifaka
mouse lemur
blue-eyes black lemur
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Document Summary

cathemerality showing both diurnal and nocturnal activity patterns. cannot predict when they will be active, tends to be a lemur trait (also seen in owl monkey) Slide 2: female dominance trait shown by some of the lemur species, targeted aggression females attack other females, even their close relatives. Reproduction in lemurs total hormonal control of mating chimps, or humans can have sex when preggers, lemurs cannot no non-conceptive matings, as in other primates (capuchins can mate whenever, they can be non-ovulating) Strict seasonal reproduction in lemurs: for lemurs, reproduction is controlled by photoperiod (# hrs exposed to daylight out of a 24 hr period) Start mating as daylight hours get shorter: in north america, reproduction is 6 mo. Out of phase with the timing of events in. Female dominance- definition: the ability of all adult females to consistently evoke submissive behaviour from all males in dyadic agonistic interactions.

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