Fish Reproduction

Bio Unit 2

Iteropary

Spawn more than once in a lifetime

Semelpary

Spawn once in a lifetime then die

Gonochorist

2 sexes, sex is genetically or environmentally determined (permanently male or female)

Hermaphroditic

Individuals have both male and female reproductive organs

Simultaneous hermaphrodites

Individuals have both sets of sex organs at the same time

Sequential hermaphrodites

Individuals change sex during their lifetime

Protandry

Starts as male and later becomes female (clownfish)

Protogyny

Starts as female and later becomes male (wrasses)

Parthenogenesis

Development of offspring from unfertilized eggs

Hybridogenesis

Hybrid females produce gametes containing only maternal genes, paternal genes are discarded

Gynogenesis

Sperm doesn't contribute genetically, offspring are clones of mother