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Flashcards in Final part 2 Deck (17)
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1

Seals, sea lions and walruses are of order? Eat what?

Pinnipedia
Mostly fish, squid, crustaceans, mollusks

2

Their blubber act as an

insulator and food reserve, while providing buoyancy

3

Bristly hair for additional

insulation (traps air)

4

Seals have _ flippers that cannot be moved forward. They pull themselves with _ flippers and swim with powerful strokes of _ flippers.

rear; front; rear

5

Sea Lions have ears with flaps while seals have _. Their skin is covered and they have _ claws, while seals have fur and _ claws.
Their _ _ can allow "walking" on land. But in seals, they can't _ under body, so they _ on land.

earholes; short; long; hind flippers; rotate; scoot

6

Types of seals

ringed, ribbon, harbor, northern fur, leopard, entangled fur

7

Sea lions can swim with and move their front flippers forward and they can be _ backward to _ _.

rotated; support body

8

Because sea otters have no fur, air is _ in dense _ for insulation.
Walruses use stiff _ as _ on the bottom.

trapped; fur; whiskers; feelers

9

Whales, dolphins and porpoises are of order

Cetacea; largest group of marine mammals
Warm blooded, have hair and produce milk

10

Two groups of cetaceans
Toothed whales have _ teeth in their jaws, and a _ blowhole.
Baleen whales have baleen (a _ _ substance, keratin) _ from upper jaw bone. (Filter _ or small _). They have _ _.

toothless and toothed; single; stiff hornlike; plankton; nekton; two blowholes

11

How do Baleen whales feed?

they fill mouth and throat, close mouth forcing water through baleen retaining prey; skimmers at surface

12

Deep diving adaptations for sperm whale

Spermaceti (regulate buoyancy)
Nitrogen enters trachea, prevent "the bends"
bradycardia
More rbc/unit of blood promotes greater oxygen carrying capacity
Shunting of blood to brain and essential organs when O2 becomes low
Lots of myoglobin in muscles
Large triangular tail flukes increase surface area for propulsion

13

Breach

Spectacular leap, crash into water to communicate to others

14

Lobtailing

head down, flukes pounding surface for warning or mating

15

Spyhopping

Tail down, rears head out of water to look where the coast is at

16

Dolphins have _ and conical teeth. They have _ or _ dorsal fins. Males travel in _ pods while females in _ pods. Family _

beaks; hooked or curved; small; larger; Delphinidae

17

Porpoises

no beaks; spade-shaped teeth; triangle shaped dorsal fin;
traveling by ones and twos