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Zoology- Caretta Caretta

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by Angelikiwi
Last updated 1 year ago

Discipline:
Science
Subject:
Zoology
Grade:
4

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Zoology

Scientific classificationKingdom: AnimaliaPhylum: ChordataClass: ReptiliaSubclass: AnapsidaOrder: TestudinesSuperfamily:ChelonioideaFamily: Cheloniidae[3]Genus: Caretta

Taxonomy:

Caretta Caretta

Carolus Linnaeus gave the loggerhead its first binomial name, Testudo caretta, in 1758. Thirty-five other names emerged over the following two centuries, with the combination Caretta caretta first introduced in 1902 by Leonhard Stejneger. The English common name "loggerhead" refers to the animal's large head. The loggerhead sea turtle belongs to the family Cheloniidae, which includes all extant sea turtles except the leatherback sea turtle.

The loggerhead sea turtle is the world's largest hard-shelled turtle. Adults have an average weight range of 80 to 200 kg and a length range of 70 to 95 cm .The maximum reported weight is 545 kg and the maximum carapace length is 213 cm The head and carapace (upper shell) range from a yellow-orange to a reddish-brown, while the plastron (underside) is typically pale yellow. The turtle's neck and sides are brown on the tops and yellow on the sides and bottom. It has lungs and breathes air. It moves with its front and rear flippers.

Physical Atributes:

Behavior:

Loggerhead sea turtles observed in captivity and in the wild are most active during the day. While resting, they spread their forelimbs to about midstroke swimming position. They remain motionless with eyes open or half-shut and are easily alerted during this state. Loggerheads spend up to 85% of their day submerged, with males being the more active divers than females. The loggerhead sea turtle is omnivorous. Loggerheads crush prey with their large and powerful jaws.Female-female aggression, which is fairly rare in other marine vertebrates, is common among loggerheads. Ritualized aggression escalates from passive threat displays to combat. This conflict primarily occurs over access to feeding grounds

The loggerhead sea turtle has a cosmopolitan distribution, nesting over the broadest geographical range of any sea turtle. It inhabits the Atlantic, Indian, and Pacific Oceans and the Mediterranean SeaFemale loggerheads first reproduce between the ages of 17 and 33. All sea turtles have similar basic nesting behaviors. Females return to lay eggs at intervals of 12–17 days during the nesting season, on or near the beach where they hatched. They exit the water, climb the beach, and scrape away the surface sand to form a body pit. With their hind limbs, they excavate an egg chamber in which the eggs are deposited. The females then cover the egg chamber and body pit with sand, and finally return to the sea. This process takes one to two hours, and occurs in open sand areas or on top of sand dunes, preferably near dune grasses that the females can use to camouflage the nest. The nesting area must be selected carefully because it affects characteristics such as fitness, emergence ratio, and vulnerability to nest predators. Loggerheads have an average clutch size of 112 eggs.Loggerheads are considered an endangered species and are protected by the International Union for the Conservation of Nature. Untended fishing gear is responsible for many loggerhead deaths. Turtles may also suffocate if they are trapped in fishing trawls. Loss of suitable nesting beaches and the introduction of exotic predators have also taken a toll on loggerhead populations.

Ecology:

Physical Attributes

5th Primary School, Iraklio Attiki4th gradeUnit 6, Lesson 2A presentation by Angeliki Taki


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