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animal phys 10-30-07

# animal phys 10-30-07 - Animal phys lect Changes in bee...

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10-30-07 Animal phys lect Changes in bee foraging behavior 1. compatibility 2. availability 3. handling time a. in case of fish – chasing smaller fish vs. picking of cemetery cray fish (big hard shell that has to be chewed – getting meat out would take longer than following a fast swimmer) b. in case of bee – maybe it’s easier to get into the flour, the necteree is open, vs the one with a higher caloric value – maybe they have to fight through all those antlers and sticklers i. how long does it take to handle the food and you can put a mathematical equation on the effects of handling time 4. challege for animals with specialized diets example: hummingbirds - adapted for taking nectar from flowers - nectar is high in carbs, but has very little protein, vitamins, or minerals - they eat insects and pollen to balance their diet, especially when raising young animals tend not to eat by their energy need but by their need plus others… 5. maybe that four calorie has slightly more of an aa than the others…if you stop here at the low calorie every once every blue moon they complete their nutrient needs. It’s hard for a mathematical equation to include these rare but vital incidents. - surface to volume ratios example: compare 1 cm3 with 10cm3 cube surface area is the surfaces and the volumes what’s inside if you do the math, that as an animal increases, it’s surface area to volume ratio gets smaller… big dice vs. smaller dice…the ratio is much smaller as the size increases. So why is this important? The greater the ratio, the more heat will be lost to the environment from the animal Larger animals tend to live at the extreme areas (polar bears, big foxes…) You’ll see a lot of terminology as you move through this type of section. In fact you’ve played with mouse and frog. There are many different words that describe what’s happened.

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Poikilothermy: body temp fluctuates with environment Crab, whose body heat derives from and reflects envir Ectothermy: body heat derived from envir Kangaroo rat, whose body heat derives from both metabolism and environ
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animal phys 10-30-07 - Animal phys lect Changes in bee...

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