Shared Flashcard Set

Details

Whales
n/a
16
Other
Undergraduate 2
11/17/2012

Additional Other Flashcards

 


 

Cards

Term
toothed whales
Definition
  • smaller (1.5-1.7 m long)
  • social
  • most are not migratory
  • chase and capture individual fish, squid, crabs
  • use sound to echolocate, communicate
Term
baleen whales
Definition
  • larger (15-30m long)
  • often solitary
  • long annual migrations
  • feed on aggregations of krill, copepods, small fish
  • use sound only to communicate and can do so over long distances
Term
porpoise
Definition
  • suborder: odotoceti- teeth (spade shaped), single blow hole
  • more gentle than dolphins
  • tinier
  • doesn't have well pronounced beak like dolphins
Term
dolphin
Definition
odontoceti
pointed teeth
more agressive: beat up porpoises
head has a beak
fin shape: larger, more angled
teach offspring: use tool
Term
killer whale eat....
Definition
fish: pelagic/demiseral (bottom)
mammal: seal, sea lions, sea otter, baleen whale
penguin, sea birds
sharks and sea rays
polar bears, other killer whales (occasionally)
Term
3 groups of killer whales
Definition
residents transients offshore
Term
killer whales: resident
Definition
more common, coastal areas (NE Pacific) eat primarily fish, complex family groups called pools visit the same areas consistently good study group for scientists
Term
killer whales: transient
Definition
don't have family bonds eat other mammals ted to go off on their own travel long distances
Term
killer whales: off shore
Definition
primarily schooling fish same type of scars as transients larger groups 20-75 whales Jim Darling?
Term
Potential Risk Factors
Definition
vessel disturbance quality/quantity of prey contaminants such as PCBs
Term
mystceti
Definition
no teeth two blow holes baleen: made of keratin includes the largest whales
Term
baleen categories
Definition
gulpers/swallower skimmers swallowers/swimmers benthics (bottom) feeders
Term
blue whale
Definition
diet: zooplankton, primarily krill (euphasids)
largest animal on earth ever
23-27 m, 125 tons (females larger than males)
at birth 7 m
record 28m
related to hippos/cows
Term
krill
Definition
polar regions and sometimes in upwelling regions
krill like to eat plankton
Term
fin whale
Definition
diet: variety of small schooling fish, squid, planktonic crustaceans (krill), gulp (right side) 17-24 m, 70 tons at birth apprx. 6.5 m 2 tons
Term
humpback whale
Definition
adults to 11-16 m, 40 tons at birth apprx 5m
females slightly larger than males
diet: small schooling fish/krill
lunge through and gulp
make bubble net around prey
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