Ch 1-5

Question 1

How many species?

• Cetaceans (M+C)
• Sirenians
• Pinnipeds (odobenidae,

Answer 1

Cetaceans:
Mysticetes=14
Odontocetes=70
Sirenians:4
Pinnipeds:
Odobenidae=1
Otariids=16
Phocids=19

Question 2

What are the six main adaptations m.mammals made for their aquatic environment?

Answer 2

• gas exchange
• heat loss
• weightlessness
• resistance to movement
• sound propagation
• low light conditions

Question 3

Defining characteristics of Mysticetes

Answer 3

• filter feeders
• 2 blowholes
• large size
• females>males
• solitary
• long migrations
• low freq. sound production

Question 4

Which family of Mysticetes have the longest baleens?

Answer 4

Family Balaenidae (right whales)

Question 5

Defining characteristics of Odontocetes

Answer 5

• teeth
• one blowhole
• melon head (sound productions)
• variable size
• males>females*
• social groups
• local and migration

Question 6

Name the characteristics of Odobenidae

Answer 6

Walrus

• no external ears
• tongue suction feeders
• bottom feeders

Question 7

Name the m.mammals of the Vestfjord

Answer 7

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.