Mating systems Flashcards
What does the term ‘semelparous’ mean?
Only mate once in lifetime
What does the term iteroparous mean?
Mate multiple times in lifetime
Name 3 methods of gametes meeting.
Broadcast spawning
Spermatophore
Intromittent organs
Define viviparous
Young develop inside mother
Define oviparous
Young develop outside of mother
Define anisogamy
Mating system involving the fusion of two dissimilar gametes
Give an example of an animal displaying mate choice.
North american bullfrogs. Females prefer males with better territories.
give an example of a semelparous species
Pacific salmon.
Is there more variation in male or female reproductive output?
Male, because female are the choosy sex. (example = European field crickets)
Why are females choosy?
For direct benefits- food, care, territory.
For genetic benefits.
What is lekking?
A lek is an aggregation of males that gather to engage in competitive displays that may entice visiting females who are surveying prospective partners for copulation.
Give an example of ‘gift giving’
Male hanging flies gift female with a prey item. Duration of mating is related to gift size.
Give an example of use of fake gifts
Spiders wrapping non edible gifts
Give an example of a species where there are multiple mating systems.
Dunnocks.
