Marine Ecology Exam 2

Dr. C Marine Ecology exam 2 study guide

Asexual reproduction

Advantages: reduced advantages, no cost of meiosis

Sexual reproduction

Advantages: genetic variability

Red Queen Hypothesis

The purpose of sexual reproduction may be to stay ahead of the coevolutionary arms race against parasites

Gonochorism

Organisms with separate sexes (produce egg OR sperm) where the sexes are determined early on and stay the same throughout life

Simultaneous hermaphroditism

Have male and female gonadal tissue at the same time

Sequential hermaphrodism

Can switch from one type of gonadal tissue to the other

Protogyny

Start as female, develop into male

Protandry

Start as male, develop into female

Size Advantage Model

Highest fitness occurs at a particular sex when young (and small) and at other sex when older (and larger)

Male reproductive investments

Maximize fitness through fertilizing many eggs

Female reproductive investments

Maximaize fitness through producing high quality offspring

Polygyny

Sexual dimorphism

Harem