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Fixed Action Patterns [module 37.3, p. 740]

Fixed Action Patterns [module 37.3, p. 740]. • entire sequence of coordinated innate reactions to a stimulus ( sign stimulus ) - can be complex - performed the first time an organism encounters the stimulus • associated characteristics. • resistant to evolution.

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Fixed Action Patterns [module 37.3, p. 740]

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  1. Fixed Action Patterns[module 37.3, p. 740] • entire sequence of coordinated innate reactions to a stimulus (sign stimulus) - can be complex - performed the first time an organism encounters the stimulus • associated characteristics

  2. • resistant to evolution © Carolina Biological / Visuals Unlimited Drosophila melangoaster

  3. • constant response even when given inappropriate stimuli

  4. • stimulus is specific

  5. • involves an entire sequence of responses European Cuckoo

  6. Junger Kuckuck, wirft die anderern Eier aus dem Nest Singvogelweibchen, füttert den jungen Kuckuck, ( auch das Füttern ist eine angeborene Verhaltensweise und läuft automatisch ab ...)

  7. http://salmon.psy.plym.ac.uk/year1/psy128animal_behaviour/animbeha.htmCourtship Behavior in the Stickleback Is courtship behavior in the stickleback an innate behavior, specifically a fixed action pattern?

  8. Steps of Stickleback Courtship 1.Male sees pregnant female 2.Digs foundation 3.Builds nest 4.Swims through nest 5.Male develops red belly 6.Female appears head up 7.Male swims zig-zag 8.Female swims toward male 9.Male swims to nest 10.Female enters nest 11.Male prods female tail 12.Female lays eggs/leaves 13.Male enters nest fertilizes eggs 14.Male aerates embryos 15.Male cares for young

  9. The Importance of Innate Behavior • •doing it right the first time can mean survival • •types of learning correlate with the complexity of an organism’s nervous system • •social interactions important for survival may depend on performing specific roles

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