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Saturday, July 25, 2020 | History

3 edition of African clawed toad xenopus laevis found in the catalog.

African clawed toad xenopus laevis

Alison Leadley Brown

African clawed toad xenopus laevis

a guide for laboratory practical work.

by Alison Leadley Brown

  • 191 Want to read
  • 29 Currently reading

Published by Butterworth .
Written in English


The Physical Object
Pagination140p.
Number of Pages140
ID Numbers
Open LibraryOL13652464M

Abstract. The South African clawed toad Xenopus laevis has become one of the most popular laboratory animals in developmental biology studies (see [11, 28, 43, 51, 76]).It can be easily kept and reproduced in captivity, and one can obtain the eggs at any given time through the year by stimulation with gonadotropic hormones; the clutch contains a sufficiently large number of eggs, and these are.   Case History. The animals described in this report are part of a colony of sexually mature, adult female South African clawed frogs (Xenopus laevis) between the ages of 2 and 4 y that were used for egg harvesting by research laboratories as outlined in protocols that were approved by Stanford University's Spring , acute mortalities and morbidities affected 7 of (4%) previously.

To tell the difference: African Clawed Frogs have webbed hind feet and autonomous digits on the front feet, whereas African Dwarf Frogs have four webbed feet. Furthermore, the eyes of the African Clawed Frog are set on the top of the head, and those of the African Dwarf Frog are positioned on the sides of . Henning F Bjerregaard's 22 research works with citations and reads, including: Toxic mechanisms of Copper oxide nanoparticles in epithelial kidney cells.

African Clawed frogs, Xenopus laevis, are large flat frog species native to wetlands, ponds, and lakes across barren regions of Sub-Saharan known as “Platanna,” these claw-toed frogs stand out in genetics, being the first vertebrate to be cloned in a laboratory.   The African Clawed Frog (Xenopus laevis) is also known to tropical fish keeping enthusiasts as the Xenopus, African Clawed Toad, or African Claw Toed frog and is the only amphibian that actually has claws. It is found in Nigeria, and from Sudan to South Africa where they are plentiful in the rivers and ponds within the southeastern portion of Sub Saharan Africa.


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African clawed toad xenopus laevis by Alison Leadley Brown Download PDF EPUB FB2

The African clawed frog (Xenopus laevis, also known as the xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the Pipidae family. Its name is derived from the three short claws on each hind foot, which it uses to tear apart its food.

African Clawed Frog Care Sheet. Common name: African Clawed Frog Scientific name: Xenopus laevis. The genus Xenopus belongs to the Pipidae family and actually derived its name from the Latin meaning ‘strange foot’.

African clawed frog, Xenopus laevis 1, and Surinam toad, Pipa pipa 2. Handcolored engraving by Forget after an illustration by Oudart from Charles d'Orbigny's 'Dictionnaire Universel d'Histoire Naturelle' (Universal Dictionary of Natural History), Paris, Housing the African Clawed Frog.

A gallon aquarium is considered the minimum appropriate size for one African clawed frog. While African clawed frogs don't need a land area, the water should only be about 12 inches deep for the frogs to easily reach the surface to breathe oxygen.

Xenopus laevis,also known as the African clawed frog (or toad) or the common platanna, is comprised of a series of sub-species that may be found ranging from the Cape of South Africa, to Sudan to the north-east and Nigeria to the north-west.

Shapiro HA The influence of the pituitary-like substance in human pregnancy urine on the motor components of sexual behavior in the South African clawed toad (Xenopus laevis).

MBL® National Xenopus Resource Center is located in Woods Hole, Massachusetts, and serves as a training center for advanced technologies.

To learn more about the workshops and classes offered be sure to visit their site:   The African clawed frog, as its better known today, was imported around the world for its use in pregnancy tests.

Doctors would ship urine samples to frog labs, where technicians would inject. (Xenopus laevis) General Description. African clawed frogs are aquatic frogs with small, wedge-shaped heads and flattened bodies.

They have smooth skin, often mottled, which is olive to brown in color on their backs and creamy white on their bellies. In clawed frog the African clawed frog, or platanna (X.

laevis) of southern Africa, a smooth-skinned frog about 13 cm (5 inches) long. It is valuable for mosquito control, because it eats the eggs and young of those insects. Native to sub-Saharan Africa, X. laevis was introduced to. They used tweezers and cauterising tools to sculpt early-stage skin and heart cells scraped from the embryos of African clawed frogs, Xenopus laevis.

The African clawed frog (Xenopus laevis) is a water-dependent species occurring in a very wide range of habitats, including heavily modified anthropogenic habitats. It lives in all sorts of waterbodies, including streams, but tends to avoid large rivers, and waterbodies with predatory fish.

It reaches its highest densities in eutrophic water. The African clawed toad, Xenopus laevis: a guide for laboratory practical work.

Unfortunately, dropsy is often fatal without immediate, aggressive treatment, so you must quarantine the infected frog and seek veterinary attention as soon as possible.

Dropsy is most commonly associated with African clawed frogs (Xenopus laevis) and dwarf clawed frogs (Hymenochirus spp.), but it may appear in other species. Photo by H. Krisp []Scientific Name: Xenopus laevis Conservation Status: Least Concern Unlike the African bullfrog, the African clawed frog doesn’t have teeth.

It is, however, armed with sharp claws on the three outer toes of its hind feet. These are used by the frog to. The chemical compounds found in the skin secretions of frogs and toads are being studied for their human benefits – everything from non-addictive pain killers to cancer cures.

Frogs have been an important part of biology education for centuries, and the African Clawed Frog (Xenopus laevis) is the modern day “lab rat.”. The African Clawed Frog (Xenopus laevis) is an aquatic, freshwater amphibian in the Pipidae family of tongueless frogs.

It is also known as the African Clawed Toad or the African Claw-Toed Frog. The African Clawed Frog is greenish-grey with olive-green markings, but albino (white) frogs are common. It has smooth, slippery skin. Xenopus is a genus of African frogs that are commonly known as the African clawed frogs.

Two species of Xenopus are regularly used by biologists, Xenopus laevis and Xenopus tropicalis. Both species are fully aquatic, and are easy to maintain in captivity. Xenopus laevis lives in warm, stagnant grassland ponds as well as in streams in arid and semi-arid regions.

The ponds are usually devoid of any higher plant vegetation, and covered in green algae. Xenopus laevis can tolerate wide variation in water pH, but the presence of metal ions proves toxic. It thrives in temperatures from 60 to 80 degrees. African Clawed Frog - Xenopus Laevis (Daudin, ) Frog and Toad Calls of the Pacific Coast - Cornell Laboratory of Ornithology and on the cd that comes with this book: Lang Elliott, Carl Gerhardt, and Carlos Davidson - The Frogs and Toads of North America - Houghton Mifflin Harcourt.

African Clawed Frog (Xenopus laevis)The African Clawed Toad (sometimes called African Clawed Frog) was traditionally used in medical testing (particularly in pregnancy tests) and many were released from laboratories and hospitals as well as, subsequently, through the pet trade.CLAWED FROGS AND SURINAM TOADS: Pipidae COMMON PLANTANNA (AFRICAN CLAWED FROG) (Xenopus laevis): SPECIES ACCOUNTSTROPICAL CLAWED FROG (Silurana tropicalis): SPECIES ACCOUNTSSURINAM TOAD (): SPECIES ACCOUNTSPHYSICAL CHARACTERISTICS.

With their flat bodies and their wide and fishlike heads, the clawed frogs and Surinam toads are an .Clawed frog, (genus Xenopus), any member of 6 to 15 species of tongueless aquatic African frogs (family Pipidae) having small black claws on the inner three toes of the hind limbs.

Xenopus species are generally dull-coloured. Their bodies are relatively flat and bear whitish fringelike mucous.