Innate behaviour

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  • Innate behaviour
    • Genetically determined - environment has no impact on behavioural response. Passed onto offspring via reproduction.
    • Rigid and inflexible
    • Patterns of behaviour are the same (stereotypical) in all members of a species.
    • Unintelligent - no sense of purpose of behaviour.
    • Innate behaviours = Any animal response that occurs without the need for learning. It is inherited.
    • Behaviours allow them to escape predators, find a habitat and locate food.
    • Innate suitable when organism has short life span, lives a solitary life and does not take care of its offspring. E.g. invertebrates.
    • REFLEXES: Escape reflex to avoid predators. Earthworms withdraw underground in response to vibration on the ground. Involuntary responses.
    • KINESES: Orientation behaviour where rate of movement increases when in unfavourable conditions. Non-directional (response is in relation to stimulus intensity, not a certain direction).
      • Woodlice avoid predation by living in dark, damp conditions. If in dry/bright, will move rapidly and randomly to find suitable conditions. Physiological response.
    • TAXES: Directional orientation response. Direction of movement described in relation to stimulus which triggers behavioural response.
      • Positive phototaxis = towards, negative = away, from a light stimulus. Positive chemotaxis = towards, negative = away from, a specific chemical.
    • Complex innate behaviour example is Worker honey bee's waggle dance. It is a display used to communicate direction and distance of a food source to other worker bees.
    • Fixed action patterns (FAP): Stimulus causes response/fixed action pattern.

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