variation in male testosterone levels and reproductive effort- polygynous- A.Alvergne, C,Faurine Flashcards
what can individual differences in parenting and mating efforts predict?
morning T levels
what is bi parental care a trade off between and how does it vary?
trade off between acquiring mates and offspring care
varies between and within individuals
what do families need?
high levels of parental investment and an extended child caring period
in US what do men in relationships have?
lower T levels
what often happens with married men with high T levels?
extra pair mating, higher marital conflict, divorce more likely
what is androgen associated with?
nurturing and parental responsiveness
in ariaal pastoralists what was the difference in morning T levels for paired and unpaired men?
paired had lower
did foragers or pastoralists give higher parental care?
foragers
what do polygynously married men tend to be?
older with more children
compared to monogamously married men what were the T levels and parental investment like for polygynous?
lower investement
higher t levels
what is patrilocal?
couple settles in husbands home
in the Senegal population what % of men over 40 were monogamous or polygynous and which had more children?
poly: 48%
mono: 26%
polygynous
out of the 81 men how many were:
a) non fathers, unmarried
b) fathers mono marriage
c) fathers poly marriage
a) 28
b) 32
c) 21
how was the males mating/parenting effort recorded?
mothers reported investment in family
number of mights spent with other women/ jealousy conflicts recorded
how were T levels measured?
in saliva glands
sampled morning and evening
what were the 3 dependent variables?
morning T levels
afternoon T levels
% daytime T change
during the day who did T levels decrease for and who didn’t?
decreased in unmarried non fathers but not married fathers
what was -vely associated with age and what +ve?
-ve: morning and afternoon T levels
+ve: % daytime change
who had lower T levels fathers or non fathers?
married or unmarried?
fathers
married
do morning t levels decline with age in poly or mono men?
poly
what were fathers less concerned with parental care morning T levels like?
higher
high morning T:
low morning T:
- polygyny, low investment
- monogamy, high investment
what may changes in afternoon T levels be due to?
social interactions from the day
what does the fact that the pattern is absent when only mothers are carers support?
sports that the endocrine system mediates parental behaviour
was the age effect found in poly or mono?
poly
whats the effect of BMI?
doesn’t affect varying T levels