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TURTLES - PowerPoint PPT Presentation

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TURTLES. WHAT HAPPENS TO NEW ZEALAND TURTLES AND HOW THEY ARE AFFECTED BY CHANGE!. What Sea Turtles look like:. The Leatherback: Leatherback - named for its unique shell which is composed of a layer of thin, tough, rubbery skin, strengthened by thousands of tiny bone plates .

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what sea turtles look like
What Sea Turtles look like:

The Leatherback:

Leatherback - named for its unique shell which is composed of a layer of thin, tough, rubbery skin, strengthened by thousands of tiny bone plates .

  • Description: Head has a deeply notched upper jaw with 2 cusps. The leatherback is the only sea turtle that lacks a hard shell. Its carapace is large, elongated and flexible with 7 distinct ridges running the length of the animal. Composed of a layer of thin, tough, rubbery skin, strengthened by thousands of tiny bone plates, the carapace does not have scales, except in hatchlings. All flippers are without claws. The carapace is dark grey or black with white or pale spots, while the plastron is whitish to black and marked by 5 ridges. Hatchlings have white blotches on carapace.
where different types turtles can be found
Where different types turtles can be found:

-Leather back –occasionally found in waters of northern NZ but also recorded as far south as Otago and Foveaux Strait.

Green Turtle- occasionally seen in NZ waters. Hawksbill Turtle- young occasionally seen on 90-mile beaches .

Logga head Turtle-occasionally found in NZ waters.

amazing miracles and tragic deaths
Amazing miracles and tragic deaths:

Some turtles are born Siamese which means they are either on the other end of each other or the heads are next to each other . Pretty cool ,eh.

There are many reasons why turtles die but I'm going to tell you the most common reason . Turtles are affected by ‘Change.’ because ...........Change brought in the invention plastic and now plastic is an every day item.

There fore ,we use plastic so much that we accidentally drop it and it falls to the ground . When it rains it picks up the rubbish (or plastic) and floats down to a gutter and out to sea . When it gets out to sea it looks like something to eat by marine life . For instance, a plastic bag looks like a Jelly fish.

Turtles eat Jelly fish and if the turtle eats the plastic bag it can’t digest it so it dies.

what sea turtles eat
What sea Turtles eat:
  •   1. Green sea turtles have finely serrated jaws adapted for a vegetarian diet of sea grasses and algae. As adults, these are the only herbivorous sea turtles.
  •   3. Some species change eating habits as they age. For example, green sea turtles are mainly carnivorous from hatching until juvenile size; they then progressively shift to an herbivorous diet.
  •   4. A hawksbill has a narrow head with jaws meeting at an acute angle, adapted for getting food from crevices in coral reefs. They eat sponges, tunicates, shrimps, and squids.
  •   5. Loggerheads' and ridleys' jaws are adapted for crushing and grinding. Their diet consists primarily of crabs, molluscs, shrimps, jellyfish, and vegetation.
  •   6. Leatherbacks have delicate scissor-like jaws that would be damaged by anything other than their normal diet of jellyfish, tunicates, and other soft-bodied animals. The mouth cavity and throat are lined with papillae (spine-like projections) pointed backward to help them swallow soft foods.   7. Researchers continue to study the feeding habits of flatbacks. There is evidence that they are opportunistic feeders that eat seaweeds, cuttlefish, and sea cucumbers.  
human threats
  • These ancient creatures have been on Earth for more than 100 million years — even surviving the dinosaurs when they became extinct 65 million years ago. Among the threats these marine reptiles face are entanglement, habitat loss, and consumption of their eggs and meat.
  • Sea turtles often drown when caught in fishing gear, both nets and long lines. Coastal development can destroy important nesting sites, impact coral reefs, and artificial light from houses and other buildings attracts hatchlings away from the ocean. Pollution like plastic bags are often mistaken for food such as jellyfish and ingested, which blocks their intestines and potentially kills them.  In some countries, they are hunted for their meat and shells and their eggs are eaten.
migratory habits of sea turtles
Migratory habits of sea turtles:

Daily Activities

Sea turtles are known to feed and rest off and on during a typical day. During nesting season, research conducted in the southeast United States helped discovered that loggerheads follow regular patterns between the nesting beach itself and offshore reefs and other rocky structures. It is presumed that mating and/or feeding occurs at these offshore areas. When it is not nesting season, sea turtles may migrate hundreds or even thousands of miles. Sea turtles can sleep at the surface while in deep water or on the bottom wedged under rocks in near shore waters. Many divers have seen green turtles sleeping under ledges in reefs and rocks. Hatchlings typically sleep floating on the surface, and they usually have their front flippers folded back over the top of their backs.

help wanted
Help wanted!:
  • One of the ways you can help save the Turtle from extinction is sponsor The Sea Turtle Foundation, or pick up rubbish to prevent it from going down a gutter and out to sea , or just spread the word.