OCEAN 101 Lecture 3: MPM notes
Document Summary
Characteristics of marine mammals: warm-blooded, breathe air, have hair (or fur, bear live young- viviparous, females have mammary glands that produce milk for their young. River otters (lutra canadensis): native to north america, 11 to 30 pounds, diet: fish, crabs, clams, inverts. Seals: sea lions have ear aps, seals don"t, seals have nails on their ippers, sea lions don"t. Harbour seals (family phocidae phoca vitulina: lack external ears, hind ippers propel them while swimming, front ippers act as rudders, travel on land is dif cult (wiggle) Sea lion (family otariidae: eared seals, front ippers propel animal when swimming, rear ippers act as rudders, fairly mobile on land. California sea lion (zalophus californianus: kingdom: animalia, phylum: chordata, subphylum: vertebrata, class: mammalia, order: carnivora. Suborder: pinnipedia: family: otariidae, genus: zalophus, species: californianus. Convergent evolution- similar body shapes stemming from different origins. Baleen whales of the salish sea: gray whales, minke whales, humpback whales: gray whales (eschrichtius robustus)
