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Creature Feature

Creature Feature. Northern Elephant Seal ( Mirounga angustirostris). Mammals Hair Mammary glands Derive their name from the large proboscis on males. Used to make loud noises during mating competitions Males can grow to 14 ft and 5,000 lbs Females are smaller (11 ft and 1400lbs).

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Creature Feature

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  1. Creature Feature

  2. Northern Elephant Seal(Mirounga angustirostris)

  3. Mammals • Hair • Mammary glands • Derive their name from the large proboscis on males • Used to make loud noises during mating competitions • Males can grow to 14 ft and 5,000 lbs • Females are smaller (11 ft and 1400lbs)

  4. Seven principal breeding areas, four of which are on islands off the coast of California

  5. Breeding! • Returns to its terrestrial breeding ground in December and January • Males arrive first and fight out breeding territory • Lots of bloodshed and injury • Few males actually breed • Females arrive and select a male • Lifetime reproduction potential of a female is about ten pups • Bulls have a harem of females • 30 to 100 cows depending on the size and strength of the bull • In a lifetime a successful bull could easily sire over 500 pups

  6. Conservation • Hunted for their blubber • By the end of the 19th Century population fell to between 100-1000 individuals • Protected since the early 20th Century • Genetic bottleneck • Susceptible to El Nino and resulting weather conditions • Marine Mammal Protection Act (1972) • Numbers have recovered to ~100,000 individuals • In CA the population continues to grow ~25% each year

  7. Video! • http://www.youtube.com/watch?v=f4YWgnRQJGY

  8. Creature Feature

  9. Weedy Sea Dragon (Phyllopteryx taeniolatus)

  10. Marine fish related to the seahorse • 45 cm in length • Swim in shallow reefs and weed beds • Resemble drifting weed when moving over bare sand • Lack a prehensile tail that enables similar species to clasp and anchor themselves

  11. Found in water 3 to 50 m deep around the southern coastline of Australia

  12. Male of the species carries the fertilized eggs • Attached under his tail • Incubated for about eight weeks • Suck food into the end of their long tube-like snout • Feed on tiny crustaceans and other zooplankton from crevices in reefs

  13. Conservation • Listed as Near Threatened by the World Conservation Union • Pollution and Industrial Runoff • Collected by divers • Washed ashore by storms

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