Migration_mechanics_shortened

Migration_mechanics_ - Mechanics of Migration That birds migrate is not surprising What is surprising is how they do it Navigation Physiology

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Mechanics of Migration That birds migrate is not surprising What is surprising is how they do it. Navigation Physiology Blackpoll Warbler 2,400 miles; 90 hrs Ruby-throated Hummingbird
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How do they do it? Fuel Fat is where the action is: Fat = 40 kJ/gram Glycogen = 17.5 kJ/gram Small birds can more than double their body mass in fat! (Hyperphagia) Yellow-rumped Warblers “Our champ went from 11 grams to 32 grams in five days” (Becky Holberton) Analogous to a 150 lb human gaining 15 lbs of pure fat/day
Background image of page 2
Fueling Up – Stopover Ecology Block Island, RI How is fat gained? Fruit in 85% of fecal samples Species with more fruit in diet, got fatter fastest Age effects Co-evolution with plants?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Dehydration (It’s not all about fat) Water is needed for cooling. But, how much water needed? (Convective heat loss vs. evaporative heat loss) 10-50% of heat production is dissipated by evaporative water loss. 2 generalizations
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 08/24/2011.

Page1 / 11

Migration_mechanics_ - Mechanics of Migration That birds migrate is not surprising What is surprising is how they do it Navigation Physiology

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online