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These giant earthworms average 1 metre (3.3 ft) long and 2 centimetres (0.79 in) in diameter and can reach 3 metres (9.8 ft) in length; however, their body is able to expand and contract making them appear much larger. On average they weigh about 200 grams (0.44 lb).
The Mekong giant earthworm may grow to a length of up to 2.9 m (10 ft). [2] Compared to their great length, these worms are relatively slender. [3] The type specimen was one metre long and 8 mm (0.3 in) wide at the broadest point (segment 5). It had 370 segments and was a greyish colour, rather paler on the ventral surface.
On average, captive animals (especially mammals) live longer than wild animals. This may be due to the fact that with proper treatment, captivity can provide refuge against diseases, competition with others of the same species and predators. Most notably, animals with shorter lifespans and faster growth rates benefit more from zoos than animals ...
The aging profile of dogs varies according to their adult size (often determined by their breed): smaller breeds have an average lifespan of 10–15 years, with some even exceeding 18 years in age; medium breeds typically live for 10 to 13 years; and giant dog breeds have the lowest minimum lifespan, with an overall average of 8 to 13 years ...
A dog’s life span may be linked to the size of its schnoz, according to a new study of data from more than 584,000 dogs across the United Kingdom.
The rate of growth during the first 14 days is very low, however; after 21 – 28 days, the rate of growth increases and then cycles up and down throughout the worm's life with no pattern. [14] The growth rate of these worms is correlated to the temperature of their environment.
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A mutation in the age−1 gene of the nematode worm Caenorhabditis elegans increased mean life span 65% and maximum life span 110%. [82] However, the degree of lifespan extension in relative terms by both the age-1 and daf-2 mutations is strongly dependent on ambient temperature, with ≈10% extension at 16 °C and 65% extension at 27 °C.