Age
When do older female whales reach menopause in relation to the younger generation?
When the younger generation reaches reproductive age
Which do females grow more related in their local groups to over time?
What is Menopause?
the stage of life when the menstrual periods stop permanently, and she can no longer get pregnant or reproduce
Why do the older generations stop reproducing?
Why does female to female relatedness within the whale local population stay constant throughout life time?
Females are born into their mothers group and so have a high local relatedness to local females at birth
What is menopause a result of?
evolved by selection to increase the total lifespan without also extending their reproductive lifespan.
happened as a result of competition, rather than as a result of age.