Sexual cannibalism

Sexual cannibalism is the consumption of a mate or potential mate by one sex in a species. It occurs before, during, or after mating.

Mate choice: Mate choice is differential acceptance or preference among potential reproductive partners. Cannibalism can determine which individuals mate and which are rejected or eaten.
Argiope bruennichi: Argiope bruennichi is a large orb-weaving spider, also known as the wasp spider. In this species, females sometimes consume males during or after mating.
Sexual selection: Sexual selection is differential reproductive success caused by competition for mates or mate choice. Cannibalism can shape which traits improve access to mates or reproductive success.
Sexual dimorphism: Sexual dimorphism is a difference in form between males and females of the same species. Extreme size differences can make one sex more vulnerable during mating.
Sexual conflict: Sexual conflict occurs when the reproductive interests of individuals of different sexes diverge. Mating and survival can favor opposing strategies for attackers and potential victims.
Latrodectus hasselti: Latrodectus hasselti is the Australian redback spider, a venomous widow spider. Males of this species perform a distinctive somersault that exposes them to female cannibalism.
Parental investment: Parental investment is expenditure on offspring that reduces an individual's capacity to invest elsewhere. Food gained from a mate may increase resources available for producing or provisioning offspring.
Intraspecific predation: Intraspecific predation is the killing and consumption of members of the same species. It includes cannibalism unrelated to courtship or mating.
Mating behavior: Mating behavior comprises actions that bring individuals together and enable reproduction. Sexual cannibalism can occur at several points in the mating sequence.
Mantis religiosa: Mantis religiosa is a mantis species native to Europe, Asia, and Africa. Its mating behavior helped make female mantises iconic examples of sexual cannibalism.

Linked from 8 pages