Tag Archives: gender

Reproductive Strategies for Survival in Animals

butterflies_mating

This week we start Chapter 12: Reproductive Strategies for Survival. Reproductive strategies include structual, functional and behavioural adaptations that increase opportunities for fertilization and/or improve survival of offspring. In the animal kingdom there are many different types of reproductive strategies:

  • Type of reproduction (sexual or asexual)
  • Gender system (separate male/female; hermaphrodite; parthenogenesis)
  • Mode of fertilisation (internal or external)
  • Mating system (monogamy; polygamy or promiscuity)
  • Numbers of offspring (r-selected or K-selected)
  • Place of development and source of nutrition for the embryo (oviparity or vivaparity)
  • Investment of parental care into offspring (nil, single parent or both parents, extended family)