Ch 1-5 Flashcards
1
Q
How many species?
- Cetaceans (M+C)
- Sirenians
- Pinnipeds (odobenidae,
A
Cetaceans: Mysticetes=14 Odontocetes=70 Sirenians:4 Pinnipeds: Odobenidae=1 Otariids=16 Phocids=19
2
Q
What are the six main adaptations m.mammals made for their aquatic environment?
A
- gas exchange
- heat loss
- weightlessness
- resistance to movement
- sound propagation
- low light conditions
3
Q
Defining characteristics of Mysticetes
A
- filter feeders
- 2 blowholes
- large size
- females>males
- solitary
- long migrations
- low freq. sound production
4
Q
Which family of Mysticetes have the longest baleens?
A
Family Balaenidae (right whales)
5
Q
Defining characteristics of Odontocetes
A
- teeth
- one blowhole
- melon head (sound productions)
- variable size
- males>females*
- social groups
- local and migration
6
Q
Name the characteristics of Odobenidae
A
Walrus
- no external ears
- tongue suction feeders
- bottom feeders
7
Q
Name the m.mammals of the Vestfjord
A
Whales:
fin, humpback, minke, sperm, killer, long-finned pilot
Dolphins:
Atlantic white sided, Atlantic white beaked, harbor porpoise
Pinnipeds:
grey seal, walrus, harbour seal, European otter.