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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.
Tadpoles grown in sibling groups metamorphosed faster than those that were kept in mixed groups. [4] Tadpoles have been shown to be able to recognize kin. [5] The 96h LC50 of commercial grade malathion for the tadpoles is 7.5 mg/L and sublethal levels of exposure can impair swimming. [6]
The common toad, European toad, or in Anglophone parts of Europe, simply the toad (Bufo bufo, from Latin bufo "toad"), is a toad found throughout most of Europe (with the exception of Ireland, Iceland, parts of Scandinavia, and some Mediterranean islands), in the western part of North Asia, and in a small portion of Northwest Africa.
Tadpole. Leptobrachium hasseltii (Hasselt's toad, Java spadefoot toad, Hasselt's litter frog, Tschudi's frog) is a species of toad found in Southeast Asia.This frog named after Dutch Naturalist Johan Conrad van Hasselt. [2]
Most species (e.g. Blyth's river frog L. blythii or the fanged river frog L. macrodon) develop normally, with free-swimming tadpoles that eat food. [5] The tadpoles of the corrugated frog (L. laticeps) are free-swimming but endotrophic, meaning they do not eat but live on stored yolk until metamorphosis into frogs. [5]
Most lay eggs in paired strings that hatch into tadpoles, although, in the genus Nectophrynoides, the eggs hatch directly into miniature toads. [1] All true toads are toothless and generally warty in appearance. They have a pair of parotoid glands on the back of their heads. These glands contain an alkaloid poison which the toads excrete when ...
Tadpoles are intermediate in morphology between those of ranids and microhylids. They have rows of oral papillae, but not keratinized teeth or horny beaks. The unique Scaphiophryne larval morphology allows for filter-feeding and the ability to use the papillae to wipe particles from substrate and churn particles from the bottom of the water ...
Tadpole. The tadpoles' appearance changes throughout their development. When newly hatched, they are 8 mm (0.3 in) long and when fully developed, 44 mm (1.7 in). They are initially mottled with brown, and increase in pigmentation (to either green or brown) during development. Their undersides are initially dark, but later become lighter in hue.