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Like other amniotes (reptiles, birds, and mammals) they breathe air and do not lay eggs underwater, although many species live in or around water. Turtle shells are made mostly of bone ; the upper part is the domed carapace , while the underside is the flatter plastron or belly-plate.
The eggs of the egg-laying mammals (the platypus and the echidnas) are macrolecithal eggs very much like those of reptiles. The eggs of marsupials are likewise macrolecithal, but rather small, and develop inside the body of the female, but do not form a placenta.
The age of a growing box turtle in the wild cannot be accurately estimated by counting the growth rings on the scutes; Their growth is directly affected by the amount of food, types of food, water, illness, and more. Box turtle eggs are flexible, oblong and are (depending on the taxon) on average 2–4 cm long weighing 5-11 g.
The chicken turtle (Deirochelys reticularia) is a turtle native to the southeastern United States. It is the only extant member of the genus Deirochelys and is a member of the freshwater marsh turtle family Emydidae. The chicken turtle's scientific name refers to its extremely long neck and distinctive net-like pattern on its upper shell.
The egg deposit does not occur until late summer or early autumn. Burrows may be as much as 1.3 meters (4 ft 3 in) deep. Breeding takes place within the burrow several months later. When the females lay eggs, they lay up to 50, and each can measure 7.5 millimeters (0.30 in) in diameter. The eggs undergo direct development inside the egg capsule ...
Researchers in the UK and the US have taken human eggs in their most early stage and developed them to maturity in a lab for the first time. It's a big achievement that could open up new avenues ...
The number of eggs in a flatback sea turtle's clutch are fewer than other sea turtles. [6] It will have an average of 50 eggs laid each time in a clutch, while other sea turtles may lay up to 100-150 eggs in a clutch. [6] [8] The eggs are about 55 mm (2.2 in) long within these clutches. [6]
Carey turtles, like all sea turtles, are protected species in Mexico and removing their eggs — which were once widely eaten — is prohibited. It's not just turtles: Further south in the Caribbean coast, in the fishing village of Punta Allen, soldiers, police and marines were strongly pressing the 700 inhabitants to completely evacuate their ...