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
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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
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3
Q

Defining characteristics of Mysticetes

A
  • filter feeders
  • 2 blowholes
  • large size
  • females>males
  • solitary
  • long migrations
  • low freq. sound production
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4
Q

Which family of Mysticetes have the longest baleens?

A

Family Balaenidae (right whales)

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5
Q

Defining characteristics of Odontocetes

A
  • teeth
  • one blowhole
  • melon head (sound productions)
  • variable size
  • males>females*
  • social groups
  • local and migration
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6
Q

Name the characteristics of Odobenidae

A

Walrus

  • no external ears
  • tongue suction feeders
  • bottom feeders
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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.

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