Flashcards in Final part 2 Deck (17)
Seals, sea lions and walruses are of order? Eat what?
Mostly fish, squid, crustaceans, mollusks
Their blubber act as an
insulator and food reserve, while providing buoyancy
Bristly hair for additional
insulation (traps air)
Seals have _ flippers that cannot be moved forward. They pull themselves with _ flippers and swim with powerful strokes of _ flippers.
rear; front; rear
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
Types of seals
ringed, ribbon, harbor, northern fur, leopard, entangled fur
Sea lions can swim with and move their front flippers forward and they can be _ backward to _ _.
rotated; support body
Because sea otters have no fur, air is _ in dense _ for insulation.
Walruses use stiff _ as _ on the bottom.
trapped; fur; whiskers; feelers
Whales, dolphins and porpoises are of order
Cetacea; largest group of marine mammals
Warm blooded, have hair and produce milk
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
How do Baleen whales feed?
they fill mouth and throat, close mouth forcing water through baleen retaining prey; skimmers at surface
Deep diving adaptations for sperm whale
Spermaceti (regulate buoyancy)
Nitrogen enters trachea, prevent "the bends"
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
Spectacular leap, crash into water to communicate to others
head down, flukes pounding surface for warning or mating
Tail down, rears head out of water to look where the coast is at
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