Reproduction Strategies pt. 2

Question 1

Anisogamy leads to differences in parental investment.

What are the two ways parental investment can differ?

Answer 1

1) Pre-fertilization
2) Post-fertilization

Question 2

What is pre-fertilization parental investment?

Answer 2

egg production requires a greater energy investment than sperm production

Question 3

What is post-fertilization parental investment?

Answer 3

gestation or incubation and defending eggs requires much energy (tasks typically carried out by females)

Question 4

What are the impacts of anisogamy in elephant seals?

Answer 4

male reproductive success is consistently high

female reproductive success varies

Question 5

Bateman’s curve

Answer 5

anisogamy causes males and females to differ in the potential rate of reproduction which is demonstrated by Bateman’s curve

Question 6

Males ARE NOT limited by….

Answer 6

production of small, cheap sperm. males can increase reproductive success by seeking multiple partners (higher fitness)

Question 7

Females ARE limited by….

Answer 7

production of large, expensive eggs. females cannot increase reproductive success by seeking multiple partners per reproductive cycle