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- Количество слайдов: 23
Sea Turtles part 3
Reproduction
Reproduction • Turtles lay eggs in nests on the beach, usually at night. • They can lay up to several hundred in one nest. • Many turtles can create several nests over a few weeks, during the reproductive season.
Reproduction • After laying all their eggs, the female turtles return to the ocean. • After sixty days the baby turtles will emerge and travel to the ocean, and must defend themselves.
Conservation • 1. What is making the sea turtles endangered? • 2. How can we protect turtles and their habitats? • 3. Problems being faced with enforcing laws. • 4. What can we do?
1. What is making the sea turtle endangered? • Coastal development • A. Destroying nesting beaches. • B. Increasing pollution in bays. • C. Distracting hatchlings with light. • D. Beach vehicle activity.
1. What is making the sea turtle endangered? • Net & Shrimp trawls • A. Entanglement and drowning. • B. Used in trade for shell and meat. • C. Destroying feeding grounds.
1. What is making the sea turtle endangered? • Industrial development • A. Sand walls preventing nesting • B. Oil spills • C. Damage to coral reefs and sea grass beds.
1. What is making the sea turtle endangered? • Natural Mortality • A. Predation as hatchlings • B. Predation as juveniles and adults • C. Old age
2. How can we protect the turtles and their habitat? • Protect nesting grounds • A. Reserves and wildlife refuge • B. Relocate eggs to hatcheries. • C. Patrol the beaches from poachers • D. Prevent coastal development and activity.
2. How can we protect the turtles and their habitat? • Education • A. Get locals involved • B. Decrease international trade of products • C. Scientific research • D. Tell others
2. How can we protect the turtles and their habitat? • Improvements • A. Improve fishing trawls (TED) • B. Protect with turtle farms • C. Decrease pollution and trash • D. Get involved
3. Problems being faced with enforcing laws • Not all countries have the money or manpower to control poaching on beaches. • Violations of poaching may only face a simple fine, or may be disregarded.
3. Problems being faced with enforcing laws • Jurisdiction varies between governmental agencies: • water = fishery depart. • land = wildlife and forest depart.
3. Problems being faced with enforcing laws • Turtle farms for trade and reinstatement cost millions of dollars and take 20 to start. • “to some people. . . trade and conservation appear to conflict, but if properly applied, they could well be the key to surviving the species” • --H. Reichart
3. Problems being faced with enforcing laws • Local people are not educated enough in rural countries and need turtle meat as a source of protein. • Not all nesting beaches can be protected.
4. What can we do as students? • We can do our part in conservation by simple acts: • 1. Picking up trash on the beach. • 2. Cutting soda 6 -pack rings, and recycle • 3. Don’t buy marine animal products and souvenirs • 4. Be careful what food we eat.
4. What can we do as students? • We can go further by: • 1. Volunteer in helping scientists do research. • 2. Adopt a turtle. • 3. Become members of animal conservation societies. • 4. Write to your Congressman.
Interesting Facts: Archelon is the oldest known fossil at 150 MYA. Found in 1970’s in S. Dakota.
Archelon: Measured 15 ft long (from beak to tail) and 16. 5 ft wide (including flippers and shell), weighing @4, 500 lbs.
Archelon: Primarily ate giant squid.
Photo Credits • • www. cccturtle. org: #1, 7, 11, 16, 17, 19, 24, 29, 37, 42 www. co. broward. fl. us/bri 00600. htm: #5 www. yoto 98. noaa. gov/books/seaturtles/seatur 1. htm: #6 www. ex. ac. uk/telematics/Euro. Turtle/homep. htm: #8, 10, 12, 14, 18, 20 www. baja-tortugas. org/conservation. html: #13, 26, 32, 36, 38 www. bonairenet. com/turtle. htm: #10, 15, 21, 49 www. seaworld. org/Sea_Turtle/seaturtle. html: #23, 41, 47 www. nps. gov/pais/turtles. htm: #25
Photo Credits cont. www. turtle. ky: #43, 46 Webhost. bridge. W. edu/Esand. G/blkbeach. htm: #45 www. itec. edu. org/conservation. html: #8, 22, 48 J. Ripple. 1996. Sea Turtles. Voyageur Press: #33, 35, 39, 40, 44 Jeff Seminoff: #9 John R. Hendrickson: #4, 27, 28, 30, 34 Hometown. aol. com/gonyosoma/folklore. html: #2 www. bonairenet. com/turtle. htm: #9, 10 www. bhigr. com/pages/info-rept. htm: #50, 51, 52