Flashcards in BIOL 329 Deck (665)
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1
distinguishing a risso dolphin
scars, whiten with age, tall dark sickle-shaped (crescent moon) fin, rounded head
2
distinguishing grizzly bear from brown black bear
grizzlies have hump on back - enlargement of shoulder blade bones for larger muscles attachment - lots of digging, forehead to nose is more concave
3
distinguish sea otter
much bigger than river otter, flat tail, dense fur, swim in groups, front paw, back flippers, rarely come on land
4
number of tetrapod species
~32,000
5
tetrapods
Amphibia
Reptile
Aves
Mammalia
6
defining tetrapod feature
legs
7
defining lizard, bird, mammal feature
lungs
8
defining reptilia, aves feature
scales
9
defining aves feature
feathers, wings
10
defining mammal feature
hair, mammary glands
11
World Wildlife Fund classification of BC
globally outstanding ecoregion
12
BC size (geographically)
Bigger than any European country except Russia and any US state except Alaska
13
BC fauna diversity
More vertebrate species than any other province or territory in Canada
14
# BC amphibia species
~20
43 in Canada
~7000 worldwide
15
# BC reptile species
~20
51 in Canada
~9600 worldwide
16
# BC bird species
~530
615 in Canada
~10,000 worldwide
17
# BC mammals
~150
207 in Canada
~5500 worldwide
18
BC plants
3150 species
richest flora in Canada
19
why does BC have such rich flora/fauna
very diverse biogeoclimatic zones
20
levels of threat and extinction graph
years (increasing up y axis), vs. probability of extinction (0 -1 increasing down x axis)
safe line is straight with high slope, vulnerable has small curve and pretty high slope, endangered has big curve extending along x axis
21
levels of threat and extinction
safe: 0.1P in 100y
vulnerable: 0.2P in 20y
Endangered: 0.5P in 10y
Critically endangered: >0.5 in 10
22
mammals vs. reserve size graph
# of individuals vs. area
min. population size is a horizontal line
small herbivores, large herbivores, large carnivores are subsequent diagonal lines
where the lines cross is minimum area required to sustain animal population
23
minimum population size to survive
~2500
24
minimum reserve area for small herbivores
10km^2
25
minimum reserve area for large herbivores
~5000 km^2
26
minimum reserve area for large carnivores
>100,000 km^2 --- doesn't exist
27
species listing categories
extinct
extirpated
endangered
threatened
vulnerable
28
extinct species listing
species no longer exists on the planet
29
extinct examples (BC)
Steller's sea cow
Dawson Caribou (1915)
30
