Males of different species of the fruit fly Drosophila that live in the same parts of the Hawaiian Islands have different elaborate courtship rituals. These rituals involve fighting other males and making stylised movements that attract females. What type of reproductive isolation does this represent?

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The different courtship rituals indicate behavioural isolation, as the males of different species have developed unique behaviours for attracting females and competing with males that are not effective on females or rival males of different species. Habitat isolation would require the species to live in different locations, while temporal isolation would require different mating times. Gametic isolation would involve the inability of sperm and eggs from different species to form a viable zygote, which is not indicated by the scenario.

Males of Different Species of the Fruit Fly Drosophila That