We are excited to announce that the first relocated turtle nest hatched two weeks ago. We have waited long enough to ensure all viable and healthy hatchlings crawled out of the nest before we dug up the remains of the nest to determine the hatching success rate. The count we got was as high as 75% ! Of course our hope for the future is to see the reproduction cycle completed when some of them will hopefully return to Alor and lay their own eggs.
Photo from Alor Divers beach front:
BABY TURTLES ON THEIR WAY TO THE SEA
From the photos we have found on the web we have identified the species of hatchlings as Loggerhead turtle.
The picture below shows four different types of sea turtle hatchlings ;
L to R: Loggerhead, Hawksbill, Green and Leatherback.
If you are interested to find out a bit more on turtle hatching, please continue to read…
(following is the excerpt from the website seeturtles.org)
Watching a baby turtle struggle out of the nest and make its way to the water is an emotional experience. Every little bump between the nest and the see can be an obstacle. Birds, crabs and fish are just a few of thepredators these vulnerable creatures face. Some experts say only one out of a thousand will survive to adulthood under natural conditions.
After an adult female sea turtle nests, she returns to the sea, leaving her nest and the eggs within it to develop on their own. The amount of time the egg takes to hatch varies among the different species and is influenced by environmental conditions such as the temperature of the sand. The hatchlings do not have sex chromosomes so their gender is determined by the temperature within the nest.
The Pivotal Temperature of a Baby Turtle
Whether hatchlings are male or female depends on the temperature where they are in the nest, known as the “pivotal temperature. » The temperature varies slightly among species, ranging between roughly 83-85 degrees Fahrenheit (28-29 degrees Celsius), at which embryos within a nest develop into a mix of males and females. Temperatures above this range produce females and colder temperatures produce males. After 45 to 70 days (depending on the species), the hatchlings begin to pip, or break out of their eggs, using a small temporary tooth located on their snout called a caruncle. Once out of their eggs, they will remain in the nest for a number of days. During this time they will absorb their yolk, which is attached by an umbilical to their abdomen. This yolk will provide them the much-needed energy for their first few days while they make their way from the nest to offshore waters.
The hatchlings begin their climb out of the nest in a coordinated effort. Once near the surface, they will often remain there until the temperature of the sand cools, usually indicating nighttime, when they are less likely to be eaten by predators or overheat. Once the baby turtles emerge from the nest, they use cues to find the water including the slope of the beach, the white crests of the waves, and the natural light of the ocean horizon.
If the hatchlings successfully make it down the beach and reach the surf, they begin what is called a “swimming frenzy” which may last for several days and varies in intensity and duration among species. The swimming frenzy gets the hatchlings away from dangerous nearshore waters where predation is high. Once hatchlings enter the water, their« lost years » begin and their whereabouts will be unknown for as long as a decade. When they have reached approximately the size of a dinner plate, the juvenile turtles will return to coastal areas where they will forage and continue to mature.
Did You Know These Baby Sea Turtle Facts?
- It’s estimated that only 1 in 1,000 hatchlings will survive to adulthood.
- Sea turtle hatchlings eat a variety of prey including things like molluscs and crustaceans, hydrozoans, sargassum sea weed, jellyfish, and fish eggs. Unfortunately, hatchlings also mistake garbage and objects like tar balls as food and ingest them.
- Leatherbach and flatback hatchlings are significantly larger than other sea turtle species.
- Leatherbacks are pelagic (open water) even as hatchlings and their larger size helps maintain their temperature.
- Hatchlings use the natural light horizon, which is usually over the ocean, along with the white crests of the waves to reach the water when they emerge from the nest. Any other light sources such as beachfront lighting, street lights, light from cars, campfires etc. can lead hatchlings in the wrong direction, also known as disorientation.
- Once out of the nest, hatchlings face many predators including ghost crabs, birds, raccoons, dogs, and fish.
- Many scientists are concerned that rising global temperatures will result in warmer sand, causing more female than male baby turtles.