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A tadpole or polliwog (also spelled pollywog) is the larval stage in the biological life cycle of an amphibian. Most tadpoles are fully aquatic, though some species of amphibians have tadpoles that are terrestrial. Tadpoles have some fish-like features that may not be found in adult amphibians, such as a lateral line, gills and swimming tails.
This is interpreted as an adaptation that allows the tadpoles to cling to the rocks until the tail is almost fully resorbed. [8] In Limnonectes limborgi, the tadpoles are free-living but non-feeding ("nidicolous") and retain their yolk sac until stage 37, at least. [9] Direct-developing frogs hatch directly as froglets, without free-living ...
This species was originally placed in the genus Philautus and later moved to Chirixalus because it was described as having free-living tadpoles. For a time, Chirixalus was recognized as synonymous with Chiromantis but is now recognized as a separate genus. [2]
Although females lay the eggs, male Darwin's frogs carry and brood the tadpoles until they are ready to be "born." - Benjamin Tapley. Even once fully grown, Darwin’s frogs are tiny, weighing ...
As a general rule, free-living larvae are fully aquatic, but at least one species (Nannophrys ceylonensis) has semiterrestrial tadpoles which live among wet rocks. [ 149 ] [ 150 ] From early in its development, a gill pouch covers the tadpole's gills and front legs.
During the final stages of transformation when the tadpoles have four limbs and a tail, they stop feeding for a short time while their mouths widen and their digestive systems adjust from herbivorous to carnivorous. Pacific tree frogs mature quickly, and usually mate the season after metamorphosis. They can live up to eight years in captivity.
The juvenile may be a tadpole for 3 to 4 years before undergoing metamorphosis. [8] However, this rate heavily varies depending on the temperature and elevation of the area. [7] There are two classes of tadpoles: first year tadpoles and second year tadpoles. Metamorphosis tends to happen the second summer of tadpole life.
As tadpoles, the squirrel tree frog is preyed upon by dragonfly nymphs, giant water bugs, predatory fish and newts. [2] [3] Once the tadpoles metamorphose, the predators of the frogs change to small mammals, other frogs, snakes, birds. [2] To reduce the danger of being eaten as tadpoles, they use dense vegetation as cover. [4]