Lecture 16 Flashcards
What are the functions of sexual behaviour?
4pts
- reproduction - produce offspring
- bonding, social
- gratification - highly moticated behaviour
- Hormones & reward systems - endorphins
What adaptations occured with reproduction?
3 pts
- bad mutations lost, good mutations spread
- disease resistance
- adaptabilityto environmental change
In polygamy, female selectsmale based on what?
4 pts
- Fitness and health traits
- Symmetry
- Coloration
- Availability
Whatare the commitments between female and males with sex?
2 pts
Female investment: direct
* Large gamete
* Gestation
* Lactation and care
Male investment: indirect
* small gametes
* paternity uncertain
How are hormones important in reproduction?
3 pts
- Affect targetedreproductive tissues and nervous system
- Hormones (regulatory substance) (gonadotropins) carried bythe blood to gonads (ovaries and testes) wheretheystimulate development of eggs and sperm
- Gonads produce the sex hormones (estrogen or testosterone) thatdirectly control most repro behaviour
Estrous vs estrus vs anestrus
3 pts
- Estrous - the estrous cycle (includes both estrus and anestrus)
- Estrus - period of “heat” or female receptivity during the estrous cycle
- Anestrus - period of sexual inactivity between 2 estrus cycles
What are the characteristics of females in estrus?
3 pts
- Attractivity - pheromones in urine
- Proceptivity - male seeking, female-female mounting (LH secretion)
- Receptivity - standing, lordisis
What factors were found of ram seeking in ewes?
3 pts
- heavier ewe = sexual maturity
- older and mixed age flocks
- large paddocks = less seeking
How do cows, horses and goats show acceptance of male?
3 pts
- Cow - lifts tail, standing
- horse - interest in stallion, urination, winking of vulva
- goat - rapid wagging of up-turned tail (flagging)
What is the psychological motivation/ libido?
2 pts
important
Physical and physiological ability
Sexual motivation and performance is stimulated by ________
2 pts
important
visual and olfactory stimuli
What is the Flahmen response?
3 pts
- inhales with mouth open and upper lip curled to allow exposure to the vomeronasal organ
- odour compounds directly contact vomeronasal organ
- boar - chant de coeur (sound)
- sheep - pawing, licking
- goat - urination
What is the sequence of elements of sexual behaviour?
3 pts
- Appetitive (invitation to approach and mount)
- Consummatory (period when sexual act takes place)
- Refractory (recovery phase)
What is the coolidge effect?
1 pt
sexual motivation restored by exposure to new or different females
