Loggerhead hatchlings, however, are able to manage this feat as soon as they reach the sea from their nests. The young loggerheads then spend several years successfully navigating complex migratory routes over thousands of miles of ocean.
New Jersey Endangered and Threatened Species Field Guide
To carry out the research loggerhead hatchlings from Florida were placed in circular water containers and tethered to electronic tracking systems to monitor their swimming direction. The hatchlings were then exposed to magnetic fields which replicated the fields they would come across in two locations on the same latitude but different longitude along their migratory route. The turtles reacted to each magnetic field by swimming in the directions that would, in the real location, take them along their circular migratory route.
The researchers say this shows that the hatchlings are able to determine longitude using information from the magnetic field.
Nathan Putman explains that "along the migratory route of loggerheads, nearly all regions are marked by unique combinations of intensity field strength and inclination angle the angle that field lines intersect the surface of the Earth ". Dr Kenneth Lohmann, director of the laboratory where this research was carried out, said the research "not only solves a long-standing mystery of animal behaviour but may also be useful in sea turtle conservation".
The research might even have a role to play in the development of human navigational technologies, according to Nathan Putman.
Statewide & Local SC Loggerhead Advocacy Groups
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Why, almost 60 years after he first appeared in the Daily Mirror, is a layabout lout from north-east England still so loved around the world? The BBC is not responsible for the content of external sites. Read more. This page is best viewed in an up-to-date web browser with style sheets CSS enabled.
Species Profile: Loggerhead Sea Turtle (Caretta caretta) | SREL Herpetology
They eat horseshoe crabs, clams, mussels, and other invertebrates. Their powerful jaw muscles help them to easily crush the shellfish.
Habitat: Prefer to feed in coastal bays and estuaries, as well as in the shallow water along the continental shelves of the Atlantic, Pacific and Indian Oceans. Nesting: Nest at intervals of 2 to 4 years. They lay 3 to 6 nests per season, approximately 12 to 14 days apart. Lays average of between to eggs in each nest. Eggs incubate for about 60 days. Status: U.
Federal Endangered Species Act. International — Listed as Vulnerable facing a high risk of extinction in the wild in the near future by the International Union for Conservation of Nature and Natural Resources.
How much do you know about these beautiful sea creatures?
Threats to Survival: The greatest threat is loss of nesting habitat due to coastal development, predation of nests, and human disturbances such as coastal lighting and housing developments that cause disorientations during the emergence of hatchlings. Other major threats include incidental capture in longline fishing, shrimp trawling and pollution. Incidental capture in fisheries is thought to have played a significant role in the recent population declines observed for the loggerhead.