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Chapter_2_lectures_a - TINBERGEN’ S TINBERGEN S ABOUT BE • How does it develop • What mechanisms caus What mechanisms cause • How did it

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Unformatted text preview: TINBERGEN’ S TINBERGEN S ABOUT BE • How does it develop? • What mechanisms caus What mechanisms cause • How did it evolve? • How does it contribute t “4 QUESTIONS” 4 QUESTIONS EHAVIOR e it Niko it? Tinbergen o survival? LEVELS OF • PROXIMATE CAUSES – Developmental mechanis – Immediate causal mechan ULTIMATE CAUSES • ULTIMATE CAUSES – Historical pathways S l ti – Selective processes ANALYSIS S sms nisms HOW AND W HY BIRDS SING Cassin’s finch finch A FEW OBSERV A FEW OBSERVA BIRD • SPECIES VARY IN CO • QUALITY OF SONG QUALITY OF SONG V • SONG TENDS TO BE S • SONG PRODUCTION • SONG VARIES GEOGR ATIONS ABOUT TIONS ABOUT SONG OMPLEXITY OF SONG VARIES WITH AGE ARIES WITH AGE SEX SPECIFIC VARIES SEASONALLY RAPHICALLY VARIATION IN SO CASSIN’S FINCH TIME (seconds NG COMPLEXITY BLACK-CAPPED CHICKADEE ) VOCALIZATION VOCALIZATIONS AG S CHANGE WITH CHANGE WITH GE SEX SPECIFIC ZEBRA F MALE CITY OF SONG FINCHES FEMALE SEASONAL VAR IATION IN SONG GEOGRAPHIC VAR • Song dialects: Song type 1 RIATION IN SONG Song type 2 Song type 3 LEVELS OF • PROXIMATE CAUSES – Developmental mechanis – Immediate causal mechan ULTIMATE CAUSES • ULTIMATE CAUSES – Historical pathways S l ti – Selective processes ANALYSIS S sms nisms Geographic Va Geographic Var Dialects in • Geographic variation in • Variants occur in cluste Variants occur in cluster – Variation within an area area areas – Boundaries between song riation in Song iation in Song: Songbirds song (within species) r s less than variation between g variants abrupt Non-geographic V Inter-individu Variation in Song: ual Variation Non-Dialectal Geograp Clinal V phic Variation in Song: ariation Song D Song D ialect ialects Some song dialects in Nuttall’s white-crowned sparrows MARIN BERKELEY SUNSET BEACH itude Mountain white- crowned sparrow song dialects in Lat song dialects in the Sierra Nevada Longitude SONORA PASS MOUNTAIN WHITE TIOGA PASS ROCKIES E-CROWNED SPARROWS What are the proximate de What are the proximate de what individual songbirds s eterminants of terminants of sing? How does song dev elop in songbirds? Natural Song Dev Natural Song Deve...
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This note was uploaded on 10/20/2009 for the course NPB 102 taught by Professor Hahn during the Winter '09 term at UC Davis.

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Chapter_2_lectures_a - TINBERGEN’ S TINBERGEN S ABOUT BE • How does it develop • What mechanisms caus What mechanisms cause • How did it

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