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Xenopus Boumbaensis
''Xenopus boumbaensis'', the Mawa clawed frog, is a predominantly to fully aquatic species of frog in the family Pipidae, known from a few localities in central and southern Cameroon, the northwestern Republic of the Congo and the extreme southwest of the Central African Republic. The species likely occurs more widely throughout the Central African forest region, but identification is difficult as it is a cryptic species, resembling ''Xenopus fraseri''; however, ''X.'' ''boumbaensis'' is distinguishable by chromosome number ( 2n=72) and the species' male advertisement call, consisting of a single note. Etymology The specific name ''boumbaensis'' refers to the type locality (Mawa) that is within the Boumba River drainage. Description Adult males can grow to and females to in snout–vent length. All ''Xenopus'' are characterized by a streamlined and flattened body, a vocal organ specialized for underwater sound production, lateral-line organs, claws on the innermost three toe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frog
A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough skin texture due to wart-like parotoid glands tend to be called toads, but the distinction between frogs and toads is informal and purely cosmetic, not from taxonomy (biology), taxonomy or evolutionary history. Frogs are widely distributed, ranging from the tropics to subarctic regions, but the greatest concentration of species diversity is in tropical rainforest and associated wetlands. They account for around 88% of extant amphibian species, and are one of the five most diverse vertebrate orders. The oldest fossil "proto-frog" ''Triadobatrachus'' is known from the Early Triassic of Madagascar (250Myr, million years ago), but molecular clock, molecular clock dating suggests their divergent evolution, divergence from other amphibians may exte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Above Sea Level
Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods. Climate change and other forces can cause sea levels and elevations to vary over time. Uses Elevation or altitude above sea level is a standard measurement for: * Geographic locations such as towns, mountains and other landmarks. * The top of buildings and other structures. * Mining infrastructure, particularly underground. * Flying objects such as airplanes or helicopters below a Transition Altitude defined by local regulations. Units and abbreviations Elevation or altitude is generally expressed as "metres above mean sea level" in the metric system, or " feet above mean sea level" in United States customary and imperial units. Com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Of The Republic Of The Congo
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant (living) amphibians belong to the monophyletic subclass Lissamphibia, with three living orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their life cycle typically starts out as aquatic larvae with gills known as tadpoles, but some species have developed behavioural adaptations to bypass this. Young amphibians generally undergo metamorphosis from an aquatic larval form with gills to an air-breathing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frogs Of Africa
The fauna of Africa are all the animals living in Africa and its surrounding seas and islands. The more characteristic African fauna are found in the Afro-tropical realm. Lying almost entirely within the tropics, and stretching equally north and south of the equator creates favorable conditions for variety and abundance of wildlife. Africa is home to many of the world's most recognizable fauna such as lions‚ rhinoceroses‚ cheetahs‚ giraffes‚ antelope, hippopotamuses, leopards, zebras‚ and elephants, among many others. Origins and history of African fauna Whereas the earliest traces of life in fossil record of Africa date back to the earliest times, the formation of African fauna as we know it today, began with the splitting up of the Gondwana supercontinent in the mid-Mesozoic era. After that, four to six faunal assemblages, the so-called African Faunal Strata (AFSs) can be distinguished. The isolation of Africa was broken intermittently by discontinuous "filter routes" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenopus
''Xenopus'' () (Gk., ξενος, ''xenos'' = strange, πους, ''pous'' = foot, commonly known as the clawed frog) is a genus of highly aquatic frogs native to sub-Saharan Africa. Twenty species are currently described within it. The two best-known species of this genus are '' Xenopus laevis'' and '' Xenopus tropicalis'', which are commonly studied as model organisms for developmental biology, cell biology, toxicology, neuroscience and for modelling human disease and birth defects. The genus is also known for its polyploidy, with some species having up to 12 sets of chromosomes. Characteristics ''Xenopus laevis'' is a rather inactive creature. It is incredibly hardy and can live up to 15 years. At times the ponds that ''Xenopus laevis'' is found in dry up, compelling it, in the dry season, to burrow into the mud, leaving a tunnel for air. It may lie dormant for up to a year. If the pond dries up in the rainy season, ''Xenopus laevis'' may migrate long di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Revue Suisse De Zoologie
The ''Revue suisse de Zoologie'' (English: ''Swiss Journal of Zoology'') is a biannual peer-reviewed scientific journal for zoological systematics. It is published by the Natural History Museum of Geneva (Switzerland). It is financed by the Swiss Academy of Natural Sciences (SCNAT) and the City of Geneva, and mainly publishes the research results of Swiss researchers or work based on the collections of Swiss institutions. Abstracting and indexing The journal is abstracted and indexed in: *BIOSIS Previews *CAB Abstracts *Science Citation Index Expanded *Scopus Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. The ensuing competition between the two databases has been characterized as "intense" and is c ... References External links * * * Zoology journals Biannual journals English-language journals Academic journals established in 1893 Academic journals associated with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odzala-Kokoua National Park
Odzala-Kokoua National Park (or Odzala National Park) is a national park in the Republic of the Congo. The park was first protected in 1935, declared a biosphere reserve in 1977, and granted official designation by presidential decree in 2001. Odzala-Kokoua has approximately 100 mammal species, and one of the continent's most diverse primate populations. The nonprofit conservation organization African Parks began managing the park in collaboration with the Ministry of Forest Economy, Sustainable Development and Environment of the Republic of the Congo in 2010. Description Odzala-Kokoua is an approximately national park and biosphere reserve in northwestern Republic of the Congo, established in 1935. The park has preserved old-growth rainforest and variable terrain, ranging from tall hills to dense jungle and numerous glades. Odzala-Kokoua has dry forest, savanna, and rainforest ecosystems. The park is managed by African Parks in partnership with the Congolese government. Hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dzanga-Sangha Special Reserve
The Dzanga-Sangha Special Reserve (also known as Dzanga-Sangha Forest Reserve, or Dzanga-Sangha Forest Special Reserve, Dzanga-Sangha Baï, or Dzanga-Sangha Special Forest Reserve) is a protected reserve of southwestern Central African Republic. It was established in 1990 and covers . It is one of several areas within the Dzanga-Sangha Complex of Protected Areas (DSCPA), each within its own protective status and along with Lobéké National Park in Cameroon and Nouabalé-Ndoki National Park in Republic of Congo, it is part of the Sangha Trinational Landscape. Other areas within the DSCPA include the Dzanga Ndoki National Park which has two sectors, the Dzanga park and the Ndoki park. A conference of the Ministers of Forests of Central African Forest Commission (COMIFAC) had resolved to establish within the Congo Basin, the Sangha River Tri-national Protected area (STN) encompassing these three parks. The forest special reserve is operated by the Central African Forest Commission ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nki National Park
Nki National Park (Parc national de Nki, also Réserve de Nki) is a List of national parks of Cameroon, national park in southeastern Cameroon, located in its East Province (Cameroon), East Province. The closest towns to Nki are Yokadouma, Moloundou and Lomie, beyond which are rural lands. Due to its remoteness, Nki has been described as "the last true wilderness." It has a large and varied ecosystem, and it is home to over 265 species of birds, and the forests of Cameroon contain some of the highest population density of forest elephants of any nation with an elephant density of roughly 2.5 per square kilometer for Nki and neighboring Boumba Bek National Park combined. These animals are victims of poaching, which has been a major problem since an economic depression in the 1980s. The indigenous people follow in the footsteps of the poachers, attracted by the financial opportunities. The removal of logging industries from the park, on the other hand, has been a success; it is no lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
