During the mating season, male three-spined stickleback fish will take on an aggressive posture whenever they see the red head and underbellies of other male stickleback fish. However, they will also adopt this aggressive posture if they see a red pencil or a red oatmeal box. For this aggressive posturing, the color red would be considered a (an) ...

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    inducer.
    register.
    releaser.
    provoker.
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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releaser.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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