Lecture3 - DEVELOPMENT OF BEHAVIOR Interactive Theory of...

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1 DEVELOPMENT OF BEHAVIOR Interactive Theory of Behavior Development • Phenotype is a product of the interactions between genotype and environment – “Environment” includes both external and internal components • Chemical environment in the body • External environment (outside the body)
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2 Nature vs. Nurture? • Artificial and misleading dichotomy • All development is product of interaction between genes and environment – No behavior is “genetic” – No behavior is “environmentally determined” Differences in behavior can be attributed to genetic or environmental effects
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3 GENETICS OF SONGBIRD MIGRATORY BEHAVIOR STUDIES OF MIGRATORY BEHAVIOR • Field studies – Banding recoveries – Telemetry and radar studies • Lab studies – Timing and duration of migratory activity • Measure with “activity perches” – Orientation preferences • Measure in “orientation funnels” ORIENTATION FUNNEL
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4 Studying migratory orientation in night-migrant songbirds BLACKCAP Sylvia atricapilla BLACKCAP • Common summer visitor to UK and continental Europe • Most spend winter in sub-Saharan Africa • Recently began to be found in UK during winter • What aspect of behavior has changed? – Some birds lost migratory behavior entirely? – Some birds change migratory path/destination?
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5 BLACKCAP BEHAVIOR • Birds that winter in UK show migratory restlessness in autumn – Not “non-migratory” residents • Birds that winter in the UK orient west in autumn – Likely go to UK from continental Europe • German birds that winter in Africa orient southwest in autumn
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6 HOW DO HYBRIDS ORIENT? • Hybrid offspring of Austrian and German birds display intermediate orientation BIRDS FROM SOUTHWESTERN GERMANY BIRDS FROM AUSTRIA HYBRID OFFSPRING GENETICS OF ONSET OF MIGRATORY ACTIVITY • HERITABILITY OF MIGRATION ONSET TIMING – Measure “midparent” migration onset timing – Calculate “residual” deviations from the mean – Do same for offspring – Compare behavior of parents and offspring – How much of variation in offspring behavior is predicted by parent behavior?
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7 GENETICS OF ONSET OF MIGRATORY ACTIVITY • HERITABILITY OF MIGRATION ONSET TIMING – Early migrants produce early migrant young – Late migrants produce late migrant young
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This note was uploaded on 05/30/2009 for the course NPB 102 taught by Professor Hahn during the Winter '09 term at UC Davis.

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Lecture3 - DEVELOPMENT OF BEHAVIOR Interactive Theory of...

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