Polar Bear

Question 1

what bear are polar bears most closely related to?

Answer 1

brown bears

Question 2

__% - __% of PB are found in CA

Answer 2

60-80

Question 3

what are the 2 primary food sources for PB?

Answer 3

ringed seal

bearded seal

Question 4

what portion of the seals do they prefer?

Answer 4

blubber and fat

Question 5

T/F Females with cubs optimize on their preferred habitat.

why?

Answer 5

F - avoid bc of infanticide

Question 6

female PB home range

Answer 6

125,100km2

Question 7

where to M and F PB go during summer?

Answer 7

M - coast

F - further inland

Question 8

methods of IDing PB

Answer 8

whisker prints
facial scars
virtual mark-recapture

Question 9

What countries are involved in the International agreement on PB conservation? what year?

Answer 9

CA
USA
Norway
Denmark
USSR
1983

Question 10

PB status under IUCN

Answer 10

Vulnerable

Question 11

PB status under endangered species act

Answer 11

threatened

Question 12

how do humans impact PB?

Answer 12

tourism
hunting
industrial activity
contaminants
researchers

Question 13

when was the original tundra buggy built?

Answer 13

1980

Question 14

problems associated with tourism

Answer 14

habituation
attraction
keeping bears out of town

Question 15

what bears were most likely to respond to vehicle approaches?

Answer 15

Males more likely to respond - F less disturbed

Question 16

how does body condition impact PB response to vehicles?

Answer 16

F - poorer body condition more likely to respond

M- better body condition more likely to respond

Question 17

how does speed impact PB response to vehicles?

Answer 17

bears respond more to faster speeds

Question 18

how does angle impact PB response to vehicles?

Answer 18

respond more to direct

Question 19

what behaviours are most likely to predict their response?

Answer 19

body shift
tongue flick
lip smack

Question 20

how can tour operators minimize respond & human induced locomotion?

Answer 20

approaching indirectly
going slowly
recognizing behaviour predictors

Question 21

why were harvest levels increased in 2005

Answer 21

based on increased sightings

Question 22

T/F Trophy hunting of PB is allowed everywhere

Answer 22

F - only CA

Question 23

how do contaminants get into arctic?

Answer 23

ocean currents
rivers
wind

Question 24

List two main contaminants in arctic. Where are they stored?

Answer 24

Organochlorines - Fat

Heavy metals - Skin/Muscle

Question 25

Define biomagnification

Answer 25

contaminants persist in fat TF magnify up the food chain

Question 26

the are food chains larger in marine than terrestrial ecosystems?

Answer 26

phytoplankton are small and lack structural tissues.
They have faster growing rate than terrestrial plants.
More nutritious