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The Jackson ratio is calculated by taking the weight of the tortoise in grams and dividing it by the cube of the length of the tortoise's carapace in centimeters. [1] This is essentially a value of the density of the tortoise in g/cm 3. The optimal value for this ratio is 0.21 with a range of 0.18–0.22 being acceptable for hibernation.
This species of tortoise can be seen everywhere in Ban Kok, a village in Suan Mon sub-district, Mancha Khiri district about 50 km (31.1 mi) from Khon Kaen city in Isan (northeastern) Thailand. These tortoises habitually coexisted with the villagers with nothing to harm them for more than 200 years since the village was founded.
The eastern subspecies T. h. boettgeri is much larger than the western T. h. hermanni, reaching sizes up to 28 cm (11 in) in length. A specimen of this size may weigh 3–4 kg (6.6–8.8 lb). A specimen of this size may weigh 3–4 kg (6.6–8.8 lb).
Sequence evolution at least in mtDNA is known to proceed much more slowly in some turtles and tortoises than in others; [5] the rate of the mitochondrial 12S rRNA gene in Testudo is probably a rather low 1.0–1.6% per million years (as this fits best the paleobiogeographical situation), limiting the resolution provided by molecular systematics ...
Greek tortoise Temporal range: Pliocene–Holocene Pre๊ ๊ O S D C P T J K Pg N Possible Late Miocene record T. g. nabeulensis male in Tunisia Conservation status Vulnerable (IUCN 3.1) Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Reptilia Order: Testudines Suborder: Cryptodira Superfamily: Testudinoidea Family: Testudinidae Genus: Testudo Species: T ...
Testudo, the Mediterranean tortoises, are a genus of tortoises found in North Africa, Western Asia, and Europe. Several species are under threat in the wild, mainly from habitat destruction . Background
The Russian tortoise is a small tortoise species, with a size range of 13–25 cm (5–10 in). Females grow slightly larger (15–25 cm [6–10 in]) to accommodate eggs. Males average 13–20 cm (5–8 in). Russian tortoises are sexually dimorphic.
The radiated tortoise (Astrochelys radiata) is a tortoise species in the family Testudinidae. [4] [5] Although this species is native to and most abundant in southern Madagascar, [6] it can also be found in the rest of this island, and has been introduced to the islands of Réunion and Mauritius. [7]