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Biology 3401 Animal Behaviour Introduction
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Scientific Method Make Observation
Formulate hypothesis to explain observation Pass Test Hypothesis Fail Pass Many Hypothesis Theory Pass Test Theory Fail Pass Many Theory Law Fail
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Tinbergen's Observations on the Bee Wolf - Philanthus triangulum
The Scientific Method Tinbergen's Observations on the Bee Wolf - Philanthus triangulum
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Tinbergen's Observations on the Bee Wolf - Philanthus triangulum
The Scientific Method Tinbergen's Observations on the Bee Wolf - Philanthus triangulum 1.Observation - Female flies in a circle before going to hunt? 2. Hypothesis - Female is using landmarks to find the nest. 3. Prediction - Female will return to a landmark to find the nest. 4. Test - Place an artificial landmark around the nest and move it when the female is away 5. Result - Female orients to new landmark. 6. Confirm hypothesis
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Tinbergen's Observations on the Bee Wolf - Philanthus triangulum
The Scientific Method Tinbergen's Observations on the Bee Wolf - Philanthus triangulum 1. Question – Is the female responding to the cones or their scent. 2. Hypothesis - Female is using visual cues to find the nest. 3. Prediction - Female will return to a landmark to find the nest. 4. Test - Place an artificial landmark around the nest and include scented (pine oil) pads. 5. Move the cones and add unscented pads when the female is away but leave the scented pads at the nest 6. Result - Female orients to pine cones and not scented pads. 6. Confirm hypothesis
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First Representations of Animal Behaviour
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Greek Philosophers Aristotle ( BCE) Perfect ‘Type’ e.g.
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COMPARISON OF ETHOLOGY AND PSYCHOLOGY
Ethology Psychology - origins in physiology & medicine - origins in natural history early focus understanding adaptive value of behaviour in the wild early focus understanding causation and motivation of human behaviour using animal models - field-based - laboratory-based - initially more observational - initially more empirical
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Historical Figures 1. Charles Darwin
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Darwin - Published Books
1835 Journal of researches (or voyage of the Beagle) 1840 The zoology of the voyage of H.M.S. Beagle Questions about the breeding of animals The structure and distribution of coral reefs. 1845 Geological observations on South America. Geological observations on the volcanic islands visited during the voyage of H.M.S. Beagle. 1850 A monograph of the sub-class Cirripedia, Fossil Cirripedia 1855 On the Origin of Species 1860 The various contrivances by which orchids are fertilised by insects. The movements and habits of climbing plants. 1865 The variation of animals and plants under domestication. 1870 The descent of man, and selection in relation to sex. The expression of the emotions in man and animals. 1875 Insectivorous plants. The effects of cross and self fertilisation in the vegetable kingdom. The different forms of flowers on plants of the same species. 1880 The power of movement in plants. The formation of vegetable mould, through the action of worms. 1885
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Darwin - Published Books
1835 Journal of researches (or voyage of the Beagle) 1840 The zoology of the voyage of H.M.S. Beagle Questions about the breeding of animals The structure and distribution of coral reefs. 1845 Geological observations on South America. Geological observations on the volcanic islands visited during the voyage of H.M.S. Beagle. 1850 A monograph of the sub-class Cirripedia, Fossil Cirripedia 1855 On the Origin of Species 1860 The various contrivances by which orchids are fertilised by insects. The movements and habits of climbing plants. 1865 The variation of animals and plants under domestication. 1870 The descent of man, and selection in relation to sex. The expression of the emotions in man and animals. 1875 Insectivorous plants. The effects of cross and self fertilisation in the vegetable kingdom. The different forms of flowers on plants of the same species. 1880 The power of movement in plants. The formation of vegetable mould, through the action of worms. 1885
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Historical Figures 1. Charles Darwin
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Historical Figures 2. Douglas Spalding
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Historical Figures 3. Lloyd Morgan
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Historical Figures 4. Julian Huxley - Courtship habits of the great crested grebe
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Historical Figures 5. J.B. Watson B.F.Skinner
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Historical Figures 7. Karl von Frisch
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Historical Figures 8. Konrad Lorenz
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Historical Figures 9. Niko Tinbergen
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Nobel Prize in Medicine and Physiology -1973
Konrad Lorenz Karl von Frisch Niko Tinbergen
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Behaviour - What is it?
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Behaviour - movement (or motor patterns)
Includes: Movement Vocalization Chemical release Colour change
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Behaviour - series of coordinated muscular contractions
-organized into motor patterns or units
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Tinbergen’s Four Questions (The 4 Why’s)
Why is this bird singing? (This is actually 4 questions) 1. What causes this bird to sing (or: what are the anatomical and physiological mechanisms underlying the behaviour)? 2. How did this behaviour develop in the lifetime of the bird? 3. What is it singing for (territory, mates)? 4. How did this behaviour evolve?
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Tinbergen’s Four Questions
A. Proximate Causes a. What is the immediate cause of a behaviour? - genetic bases - neural mechanisms - hormonal mechanisms - environmental (external stimuli) - precedent events
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Tinbergen’s Four Questions
A. Proximate Causes a. What is the immediate cause of a behaviour? b. What is the ontogeny (or development) of a behaviour? - changes with age - interaction of genes with environment (over time) - innate vs. learned components
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Tinbergen’s Four Questions
A. Proximate Causes a. What is the immediate cause of a behaviour? b. What is the ontogeny (or development) of a behaviour? B. Ultimate Causes a. What are the functional (adaptive) reasons for a behaviour? - contribution of a behaviour pattern to individual fitness - how does natural selection influence a behaviour?
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Tinbergen’s Four Questions
A. Proximate Causes a. What is the immediate cause of a behaviour? b. What is the ontogeny (or development) of a behaviour? B. Ultimate Causes a. What are the functional (adaptive) reasons for a behaviour? b. What is the evolutionary history of a behaviour? - expression of a behaviour in related species - evolutionary changes in behaviour in related lineages
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SUMMARY BEHAVIOUR PATTERN(S) Neural mechanisms
Physiological mechanisms Individual survival & reproductive success Genetic mechanisms Developmental mechanisms Gene pool of next generation
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Genetic/Developmental
Levels of Analysis in Ethology Proximate Causes Ultimate Causes Genetic/Developmental Mechanisms Sensory/Motor Mechanisms Historical Pathways Selective Processes -adaptive context ? -effects of heredity -development of sensory- motor systems gene-environment interactions -nervous systems for stimulus detection -hormone systems for adjusting response levels -muscles for carrying out responses -evolutionary development of a trait Why? How?
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Ecology Population Biology Evolutionary Biology Genetics Ethology Sociobiology Endocrinology Neurophysiology Physiology
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