TURTLE SWIM


You will be dazzled by the resident turtles of the islands. We take you where you can observe their behavior and take underwater photos and film clips with the ship’s digital videocamera.


ABOUT THE TURTLES

Green turtles get their name because of the color of their body fat which gives the turtle its characteristic color. The carapace (the hard top shell) is mottled light to dark brownstreaked with olive green. Adults can weigh between 200 to 500 pounds. Fairly long flippers and an oval shell make Green turtles hydrodynamically suited to long-distance swimming.

DIET 
Juvenile Green turtles are carnivorous (meat eating), until the age of six months to a year. However, adult Green turtles are largely vegetarian eating underwater grasses especially turtle grass (Thalassia) and sea weeds.

REPRODUCTION
The time in which Green turtles become sexually mature is very long but also very variable. Individuals can mature from anywhere between 25 – 40 years of age. They mate in the water usually adjacent to the beach that the female will lay her eggs. After mating, the female Green Turtle usually nests at night. She drags, herself out of the sea and onto a nesting beach, up beyond the reach of high tide. Using her hind fl ippers like shovels, she scoops out a bottle shaped hole and lays about one hundred white, leathery eggs that look like ping-pong balls. She covers, the nest with sand and returns to the sea, praying no further attention to it and never seeing her young.

The sun’s ray heat the beach, warming the turtle eggs buried in the sand. Temperature will determine the sex of the young turtles. Females emerge from the eggs on top where warmer temperatures are found; males emerge from the bottom where cooler temperatures are found. The eggs develop in the nest and are ready to hatch in about two months. Almost all must hatch at the same time, for they all must share the work of digging out from the nest. When the hatchlings are an inch or two below the surface of the beach they become quiet and wait for the surface temperature to drop indicating nightfall. Under the protection of darkness the baby turtles burst out of the nest and rush to the water. Phosphorescence (a light given off by organisms living in the sea) creates a glow that provides direction for these turtles as to the location of the ocean. The hatchling instinctively heads for this “bright” horizon. Tragically, in settled areas, hatchlings are now attracted to the bright lights of highways, hotels and parking lots and head away from the sea instead of towards it. They are usually killed. Thousands of hatchlings are lost this way each year.

HABITAT
Green turtles can be found in waters between 35 degrees north and 35 degrees south latitude. They also nest in many places in The Bahamas.

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1.© Tina C Dreffin 2017