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Migration and Hibernation

AP Biology Presentation [EU2B] 2012

Katie Baird

on 9 May 2013

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Transcript of Migration and Hibernation

Migration & Hibernation Survival of the Fittest Natural Selection Big Idea 1 Returns! reduction of metabolic
rate and temperature that results
in a state of dormancy Torpor Hibernation a state where deep torpor
lasts for several months, usually performed by mid-sized animals Body temperature drops 20 degrees C!
(68 degrees F) Heart rate for squirrels slows
from 80 to 4 beats per minute! Bears hibernate differently than most animals. Diapause the hibernation of insects Reasons for Hibernation food source dwindles in winter
could not survive without stored energy
colder climate not favorable for some organisms begins on the same day every year,
regardless of temperature Response to the Environment body temperature does not decrease as much
never wakes up to excrete! Migration an option for animals to leave
the environment that is no longer
meeting their survival needs Reasons for Migration climate changes
low food/water sources
overpopulated environment Types of Migration Seasonal Migration
Latitudinal Migration
Altitudinal Migration
Reproductive Migration
Complete Migration
Partial Migration How Animals Migrate sun/stars
magnetic fields
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