8 huddling & walking - 2/17/11! Prelim 1: Feb. 23...

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2/17/11 1 1 Prelim 1: Feb. 23 (in class) • Review session: –Sunday, Feb. 20 –7:00pm –Uris 202 • Review session format: bring your questions • Prelim outline coming later this week to Blackboard 2 Expt. 1 results 3 Experiment 2: Does huddling conserve metabolic energy in rat pups? Examined oxygen metabolism as a better measure of thermo-regulatory ability When cold, pups ±re brown adipose tissue (BAT) which is metabolically costly
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2/17/11 2 4 Text Measuring thermoregulation in altricial young 5 Inverse relationship between huddle size and metabolic rate 6 Experiment 3: behavior of huddling Is huddling an active regulatory behavior or a Fxed response? • Hypotheses: low ambient temp => reduced surface area high ambient temp => increased surface area • Examined surface area of clump as a function of ambient temp
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2/17/11 3 7 Measuring surface area 8 Active regulation of huddle size 9 Examples of pup Fow in huddle
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2/17/11 4 10 11 Individual pups actively contribute to
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8 huddling & walking - 2/17/11! Prelim 1: Feb. 23...

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