mating systems Flashcards
(14 cards)
List three advantages of spawning.
- little energy involved.
- young are widespread.
- less precopulatory competition
List 3 disadvantages of spawning.
- many gametes will die unfertilised
- not all the eggs will be fertilised
- the fertilised games will be spread- vulnerable individuals.
List two advantages of internal fertilisation
- offspring more likely to survive as they are cared for in most cases when they are young.
- offspring are taught how to survive.
List 3 disadvantages of internal fertilisation
- more energy requires to find and fertilise a mate
- fewer progeny.
- progeny are concentrated and an easier target for prey.
what is monogamy?
1 male+1 female
what is polygamy?
> 1 male+1 female
what is polyandry?
1 male+>female
what is promiscuity?
> male+>female
What is resource defence in terms of polygyny?
The acquisition of females through territory nuptial gifts and other resources.
What is scramble competition in terms of polygyny?
Males rush around an area meeting with any female they come across.
What is lek competition in terms of polygyny
When many emails gather a common ground for females to choose between them.
What is fertility assurance in terms of polyandry?
The egg will definitely be fertilised by somebody’s sperm if many males are mating.
What is the good jeans hypothesis in terms of polyandry?
If a male has exuberant phenotypic characteristics it will be evident that they have enough energy to spare to make them meaning they have good genes to aid the general survival.
Why will that be reduced violence in a polyandric setting
All the males will protect the female because they all think she has that young and there will be less infanticide for the same reason.
