Lecture - Social Interactions

Lecture - Social Interactions - Social Interactions Animal...

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Unformatted text preview: Social Interactions Animal Behavior Observable coordinated responses to stimuli Originates with genes that direct the formation of tissues and organs of the animal body Spider Responds to Prey Mama spiders dont teach their offspring (instinctive Nervous System Detects processes and integrates information about stimuli Commands muscles and glands to make suitable responses Suitable Response? How much of human behavior is innate or learned? Starling Nest Decoration Starlings line nest with wild carrot Experiments have shown this behavior minimizes mites Experimental nests Control nests Figure 46.2 Page 826 Genes and Behavior Some variations in behavior have a genetic basis Arnold showed that garter snakes taste for slugs has genetic basis Hybrid snakes showed behavior intermediate between parental types Hormones and Bird Song Sex hormones produced during development prime male birds to sing As adults, males will sing only when days are long and levels of the hormone melatonin are low Goldfinch's Respond to Longer Days Winter (short day) Summer (long day) Instinctive Behavior Performed without having been learned Usually triggered by simple sign stimuli Response is a stereotyped motor program, a fixed-action pattern Example of Instinctive Behavior Knee-jerk Learned Behavior Responses change with experience Some categories of learned behavior Imprinting Spatial learning Insight learning Habituation Classical conditioning Operant conditioning imprinting Encyclopdia Britannica Article Page 1 of 1 in psychobiology, a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience and thereafter follows that object. In nature the object is almost invariably a parent; in experiments, other animals and inanimate objects have been used. Imprinting has been intensively studied only in birds. Imprinting Time-dependent learning Triggered by exposure to a sign stimulus during a sensitive period Young geese imprint on a moving object and treat it as mother Lorenz and Imprinting Young geese will follow larger animate objects to which they imprint Mom. Classical Conditioning First demonstrated by Pavlov An autonomic response becomes associated with a novel stimulus Salivation became associated with sound of bell that accompanied feeding Pavlovs Lab Operant Conditioning A voluntary action becomes associated with its consequences A toad may attempt to eat a wasp with a black and gold pattern and be stung Thereafter, the toad will be conditioned to avoid eating similar insects "A person does not act upon the world,...
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Lecture - Social Interactions - Social Interactions Animal...

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