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Nudibranch of the week!!!

Nudibranch of the week!!!. Sea birds and marine reptiles. Marine Reptiles. 7000 living species Poikilotherms Ectotherms First appeared more than 3MYA. Sea Turtles. An ancient group of reptiles Bodies e nclosed in a carapace Sea turtles cannot retract heads into shell 9 species

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Nudibranch of the week!!!

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  1. Nudibranch of the week!!!

  2. Sea birds and marine reptiles

  3. Marine Reptiles • 7000 living species • Poikilotherms • Ectotherms • First appeared more than 3MYA

  4. Sea Turtles • An ancient group of reptiles • Bodies enclosed in a carapace • Sea turtles cannot retract heads into shell • 9 species • Must return to land to reproduce

  5. Green Turtles, Cheloniamydas • Live primarily in warm waters • Shells grow 1m in length • Feed on seagrasses and seaweeds • Lack teeth, have strong jaws

  6. Leatherback Dermochelyscoriacea • Largest sea turtle • May attain a length of 7ft and weigh 1200lb • Have a series of small bones buried in dark skin • An open water, deep diving species • Diet consists of jellyfish • Endangered

  7. Sea Turtle Reproduction • All sea turtles must return to land to reproduce • Lay eggs on remote sandy beaches • DNA of turtles breeding in one area differs from DNA of turtles breeding in another area • Females only venture at hight to lay eggs • Incubation period is about 60 days • Hatchlings are very vulnerable

  8. Sea Snakes • 55 species • Found in the Indian and Pacific Oceans • Most are 3-4 feet • Ovoviviparous • Carnivores • Most common of all venomous snakes • Rarely aggressive

  9. Other Marine Reptiles • Saltwater crocodile • Inhabits mangrove swamps in Eastern Indian Ocean, Australia, Western Pacific islands • Most common on coast • Record of one being 33ft, but on average are 20ft. • Most aggressive of all marine animals • Marine iguana • Galapagos Islands • Spends most of its time basing in large groups of rocks • Eats seaweeds • Can dive up to 33feet

  10. Seabirds • Seabirds have significant advantages over reptiles • Ability to fly • homeotherms • Eddotherms • Water proof feathers • Nest on land • Breed in large colonies • Distributed pole to pole • 9700 species • Need a lot of food to supply energy to maintain their body temperatures

  11. Penguins • Flightless birds • Bones are denser than any other bird to make diving easier • 18 species • All in live in the southern hemisphere

  12. Where Penguins Live

  13. Tubenoses • A large group of seabirds with distinctive tube like nostrils and heavy beaks that are curved • They have salt glands to get rid of excess salt • Skilled fliers • Scavangers • Many breed in the area of Anarctica • Faithful relationships

  14. Pelicans and Related Birds • Webbing between all four toes • Pelicans have a unique pouch below their beaks • Nest in large colonies • Deposits of guano are mined for fertilizer • Build messy nests of twigs and whatever else they can find

  15. Gulls and Related Birds • Largest variety of sea birds • Will eat just about anything • The Arctic tern wanders 10000 miles during the year • Puffins and razorbills are also related

  16. Shorebirds • Wading birds that do not have webbed feet • Many live inland • Common in estuaries and marshes • Common examples • Plovers • sandpipers

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