c. sea lion facts

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Last updated 3:52 PM on 6/2/26
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36 Terms

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order

carnivora

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sub order

pinnipedia

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family

otariidae

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sub family

ortariinae

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genus

zalophus

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species

californiaus

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distribution

prince william sound alaska to chipas mexico

  • breeding grounds- cali and mexico

  • males migrate more than females

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habitat

temperate and tropical climates

  • rocky and sandy

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population count

~290,000

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diet

squid, various fishes, octopus

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how much of their body weight is eaten per day

5-8%

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migration

in breeding season (may-july) south of 34 latitude

  • mid-july to april males migrate north

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coloration

  • newborns: dark brown to black

    • molt to tawny brown at 4-6 mo

  • females: tawny brown

  • males: light brown to black

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coat

2 layers

  • protective guard and underfur hairs

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flippers

  • short hind flippers (used for steering)

  • front flippers make an up and down sweeping motion with front flippers

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grooming

scratching with flippers or rubbing on rocks or other sea lions

  • 3 nails/claws on flippers to scratch

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head

males have sagittal crest on head (peak at top)

  • appears around 5 years old usually topped with lighter fur

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pinnae

small ear flaps

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vibrssae

38 on either side of the face

  • attached to muscles

  • each have a set of nerves

    • used to give info about objects

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size difference

sexually dimorphic (males larger)

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adult length

male- 7 feet 10 in

female- 6 feet 7 in

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adult max weight

male- 858 lbs

female- 242 lbs

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adult average weight

male- 770

female- 220

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hearing

range underwater 100 Hz to 30 kHz

range out of water 100 Hz to 35 kHz

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vision

poor under low illumination

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color vision

have dichromatic color vision

  • can see blue green color spectrum

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tapetum lucidem

highly developed tapeta enhances vision in dim light (like cats eyes)

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smell

used mostly for social situations

  • mating and mother-pup recognition

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taste

can detect sour flavor like people, salty and bitter with less sensitivity

  • no sweet

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swim speed

6-8 mph

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diving

shallow( 66-164 feet) and short duration divers (1.5-2.8 minutes)

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breat hold

max 10 min

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dive max depth

900 feet

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thermoregulation

thick blubber layers to insulate and maintain body temp

  • to cool —> enter the water or wet bodies and cool through evaporation

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social behavior

play behavior is common

  • body surfing, rough and tumble swimming, romping, wrestling, twisting, and grabbing at one another

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