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General examples of polyandry occur in fish species, such as green swordtails [1] and Trinidadian guppies. [3] Specific types of polyandry have also been classified, such as classical polyandry in pipefish [4] cooperative polyandry in cichlids [5] and convenience polyandry in sharks. [6]
It is the situation in which females adjust their mating rate to balance the costs of male harassment. It has been suggested that convenience polyandry would increase when females are weaker than males, decreasing the costs of sexual aggression. Convenience polyandry is seen in several arthropod species, like water striders (Gerris buenoi). [22]
Guppies have the mating system called polyandry, where females mate with multiple males. [22] Multiple mating is beneficial for males because the males' reproductive success is directly related to how many times they mate.
This has been recorded in Baltic herring, Guppies, Nassau groupers, humbug damselfish, cichlids and creole wrasses. Polygamy, where one sex has multiple partners can come in many forms. Polyandry consists of one adult female breeding with multiple males, which only breed with that female. This is rare among teleosts, and fish in general, but is ...
In guppies, a post-copulatory mechanism of inbreeding avoidance occurs based on competition between sperm of rival males for achieving fertilisation. [42] In competitions between sperm from an unrelated male and from a full sibling male, a significant bias in paternity towards the unrelated male was observed.
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Polygynandry is a mating system in which both males and females have multiple mating partners during a breeding season. [1] In sexually reproducing diploid animals, different mating strategies are employed by males and females, because the cost of gamete production is lower for males than it is for females. [2]