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5 Cards in this Set

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what are some factors promoting the evolution of parental care
1) complex, stable environment- env. with lots competition (rainforest)
2) difficult environment
3) specialized diet- like the oyster shell birds
4) preditor pressure/ infanticide
_____ is the number of offspring remaining to be born to the average female at age X. Reproductive value changes with age
reproductive value
do older females invest more in their young?
One hypothesis says yes because she has low reproductive so there is a reason for her to sacrifice her welfare for the few kids that she can still have- parental care 6
Do older females always invest more in offspring than younger females
no- older mares did not invest more but investided more of energy at critical time period. Also, study showed overall older mares invested less.
Do insects have r or s type parental care
r type because they usually have lots of offspring and invest little in each one.