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Wildlife Physiological Ecology

Wildlife Physiological Ecology. Prof: Creagh Breuner Associate Professor; Wildlife Biology and Organismal Biology and Ecology Office: Natural Science Annex, rm 101 Email: creagh.breuner@umontana.edu Phone: 243-5585 Office Hours: after class on Monday or by appointment

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Wildlife Physiological Ecology

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  1. Wildlife Physiological Ecology • Prof: Creagh Breuner • Associate Professor; Wildlife Biology and Organismal Biology and Ecology • Office: Natural Science Annex, rm 101 • Email: creagh.breuner@umontana.edu • Phone: 243-5585 • Office Hours: after class on Monday or by appointment • TA: Warren Hansen • Graduate Student: Wildlife Biology • Office: Natural Sciences 105 • Email: Warren_Hansen@gmail.com • Phone: 406-243-5505 • Office Hours: TBA

  2. YOUR FOLDER Career goal Comfort food NAME First only One positive word your friends would use to describe you Where were you born?

  3. LAYSAN ALBATROSS

  4. Puffin Seabird Nesting Gannets Murres

  5. Capital vs. Income Breeders CAPITAL INCOME Deer and Finches Salmon and sea lions Decouple feeding and reproduction Constant feeding during reproduction

  6. Laysan Albatross

  7. Incubation Timeline: who’s on the nest? = 1 week ♂ incubates while ♀ leaves to feed ♂ incubates while ♀ leaves to feed Hatch ♀ returns ♂ goes to feed ♀ lays egg How can they do this????? • Flight Morphology • Fasting Physiology

  8. 30 25 20 aspect ratio 15 10 5 0 pheasant eagle gull albatross Flight Morphology Big bird… AMAZING wings 1. Aspect Ratio: wing length/wing breadth…larger aspect ratio = better glider

  9. Flight Morphology Big bird… AMAZING wings 1. Aspect Ratio: wing length/wing breadth…larger aspect ratio = better glider 2. Dynamic Soaring:shape of wing allowsflight without flapping • Low metabolic cost of soaring: • in albatross, cost of soaring flight = cost of sitting on eggs

  10. Albatross weight loss over ~4 week fast 105 100 95 % of Initial Condition 90 85 80 75 70 0 5 10 15 20 25 30 35 Days of Fasting Fasting Physiology • Big Body Size: can hold high level of energetic reserves • Can maintain fast without risking flight muscles • Burns energy stores in stomach (stage I) • Burns through fat reserves (stage II) • Does not burn protein reserves (muscle) until fat is gone (stage III) …?...too few data Stage I Stage II

  11. Albatross Summary • How to avoid high competition for breeding sites? • What adaptations allow albatross to separate foraging and reproduction? • Flight morphology • Fasting Physiology

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