amphibian


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amphibian

(ăm-fĭb′ē-ən)
n.
Any of various cold-blooded, usually smooth-skinned vertebrates of the class Amphibia, characteristically hatching as an aquatic larva with gills and then transforming into an adult having air-breathing lungs. Frogs, toads, salamanders, and caecilians are amphibians.

amphibian

(am-fĭb′ē-ăn)
An animal of the class Amphibia.
amphibian, adjective

amphibian

a member of the vertebrate class Amphibia, containing frogs, toads, newts, salamanders and the burrowing caecilians. Descended from fish-like animals, they colonized the land in the late DEVONIAN PERIOD. They are thought to be the immediate ancestors of the reptiles, though present-day amphibians are little like their Devonian ancestors. Most amphibians, although normally terrestrial animals, return to water during the breeding season. Fertilization is external (the eggs lacking a shell and embryonic membranes), and the eggs are usually laid and develop in water.
References in periodicals archive ?
But the continent is a market for amphibians from Asia, and as veterinary pathologist Allan Pessier of San Diego Zoo Global puts it, "we need to focus on disease screening and biosecurity for imported animals.
8220;By presenting yet another platform for quality reptile and amphibian resources and entertainment, we're strengthening that bond.
Reptiles, amphibians, and human Salmonella infection: a population-based, case-control study.
Looking for lost amphibians can help researchers learn how to save them.
Effects of pool size and isolation on amphibian communities.
The study findings will support DoD natural resources managers and environmental specialists by providing baseline data on the health of amphibian populations.
IUCN and its partners Conservation International and NatureServe have released an Amphibian Action Conservation Plan, which outlines ways that international institutions, national governments, corporations and even everyday people can take part in helping to save our frogs and their relatives.
You can join the hunt for lost amphibians -- a unique research programme to be formally launched by the University of Delhi on Tuesday.
Hence any information about their conservation is extremely vital not only from an amphibian research point of view but also from the perspective of overall nature conservation," explains Delhi University Associate Professor Dr S.
Amphibian biologists are concerned about a worldwide decline in amphibian numbers and species (Blaustein & Wake 1990; Wyman 1990; Wake 1991; Stuart et al.
But amphibian populations have been fluctuating for a long time, and at this point it's just unclear whether we're dealing with year-to-year variation or a long-term trend.
Helen Meredith, Edge amphibians co-ordinator, said: "Clearly there is no time to waste if we are to prevent further species loss and effectively conserve unusual, threatened and neglected amphibian species in the wild.