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Alopochen Kervazoi And Anas Theodori
''Alopochen'' is a genus of the bird family Anatidae, part of the subfamily Tadorninae along with the shelducks. It contains one extant species, the Egyptian goose (''Alopochen aegyptiaca''), and two or three species which became extinct in the last 1000 years or so. The Egyptian goose is native to mainland Africa, and the extinct species are from Madagascar and the Mascarene Islands. mtDNA cytochrome ''b'' sequence data suggest that the relationships of ''Alopochen'' to ''Tadorna'' need further investigation. Species * Egyptian goose, ''Alopochen aegyptiaca'' The extinct species of the genus are: * Malagasy shelduck or Madagascar shelduck, ''Alopochen sirabensis'' (Andrews 1897) (may be subspecies of ''A. mauritiana'') – Madagascar, prehistoric: see Late Quaternary prehistoric birds * Mauritius sheldgoose, ''Alopochen mauritiana'' (Newton & Gadow 1893)– Mauritius, late 1690s * Réunion sheldgoose or Kervazo's Egyptian goose, ''Alopochen kervazoi'' (Cowles 1994) Mourer-Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egyptian Goose
The Egyptian goose (''Alopochen aegyptiaca'') is a member of the duck, goose, and swan family Anatidae. It is native to Africa south of the Sahara and the Nile Valley. Egyptian geese were considered sacred by the Ancient Egyptians, and appeared in much of their artwork. Because of their popularity chiefly as an ornamental bird, escapees are common and feral populations have become established in Western Europe, the United States, and New Zealand. Taxonomy The Egyptian goose is believed to be most closely related to the shelducks (genus ''Tadorna'') and their relatives, and is placed with them in the subfamily Tadorninae. It is the only extant member of the genus ''Alopochen'', which also contains closely related prehistoric and recently extinct species. mtDNA cytochrome ''b'' sequence data suggest that the relationships of ''Alopochen'' to ''Tadorna'' need further investigation. Etymology The generic name ''Alopochen'' (literally, ''fox-goose'') is based on Greek (''alōpós ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DNA Sequence
DNA sequencing is the process of determining the nucleic acid sequence – the order of nucleotides in DNA. It includes any method or technology that is used to determine the order of the four bases: adenine, guanine, cytosine, and thymine. The advent of rapid DNA sequencing methods has greatly accelerated biological and medical research and discovery. Knowledge of DNA sequences has become indispensable for basic biological research, DNA Genographic Projects and in numerous applied fields such as medical diagnosis, biotechnology, forensic biology, virology and biological systematics. Comparing healthy and mutated DNA sequences can diagnose different diseases including various cancers, characterize antibody repertoire, and can be used to guide patient treatment. Having a quick way to sequence DNA allows for faster and more individualized medical care to be administered, and for more organisms to be identified and cataloged. The rapid speed of sequencing attained with modern D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Genera
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. Bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alopochen
''Alopochen'' is a genus of the bird family Anatidae, part of the subfamily Tadorninae along with the shelducks. It contains one extant species, the Egyptian goose (''Alopochen aegyptiaca''), and two or three species which became extinct in the last 1000 years or so. The Egyptian goose is native to mainland Africa, and the extinct species are from Madagascar and the Mascarene Islands. mtDNA cytochrome ''b'' sequence data suggest that the relationships of ''Alopochen'' to ''Tadorna'' need further investigation. Species * Egyptian goose, ''Alopochen aegyptiaca'' The extinct species of the genus are: * Malagasy shelduck or Madagascar shelduck, ''Alopochen sirabensis'' (Andrews 1897) (may be subspecies of ''A. mauritiana'') – Madagascar, prehistoric: see Late Quaternary prehistoric birds * Mauritius sheldgoose, ''Alopochen mauritiana'' (Newton & Gadow 1893)– Mauritius, late 1690s * Réunion sheldgoose or Kervazo's Egyptian goose, ''Alopochen kervazoi'' (Cowles 1994) Mourer-Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island of Madagascar and southwest of the island of Mauritius. , it had a population of 868,846. Like the other four overseas departments, Réunion also holds the status of a region of France, and is an integral part of the French Republic. Réunion is an outermost region of the European Union and is part of the eurozone. Réunion and the fellow French overseas department of Mayotte are the only eurozone regions located in the Southern Hemisphere. As in the rest of France, the official language of Réunion is French. In addition, a majority of the region's population speaks Réunion Creole. Toponymy When France took possession of the island in the seventeenth century, it was named Bourbon, after the dynasty that then ruled France. To break ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion Sheldgoose
The Réunion sheldgoose or Kervazo's Egyptian goose (''Alopochen kervazoi'') is an extinct species of sheldgoose from Réunion. It was a close relative of the Egyptian goose and was about the same size. There is only one description remaining, that of Dubois made in 1674. Apart from that, the species is only known from brief reports and subfossil bones. Dubois' full account reads as follows: Extinction Waterfowl on Réunion were overhunted. As early as 1667, François Martin complained of unsustainable hunting. The last record of the species is a 1709 listing of de la Merveille who stated that ducks and geese occurred "in quantity", but as Jean Feuilley had not listed waterfowl in his 1705 catalogue of Réunion's animals, de la Merveille's record is obviously based on obsolete hearsay information. Thus, the last record of the species appears to be the report of Père Bernardin A name suffix, in the Western English-language naming tradition, follows a person's full name and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mauritius
Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It includes the main island (also called Mauritius), as well as Rodrigues, Agaléga and St. Brandon. The islands of Mauritius and Rodrigues, along with nearby Réunion (a French overseas department), are part of the Mascarene Islands. The main island of Mauritius, where most of the population is concentrated, hosts the capital and largest city, Port Louis. The country spans and has an exclusive economic zone covering . Arab sailors were the first to discover the uninhabited island, around 975, and they called it ''Dina Arobi''. The earliest discovery was in 1507 by Portuguese sailors, who otherwise took little interest in the islands. The Dutch took possession in 1598, establishing a succession of short-lived settlements over a period of about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mauritius Sheldgoose
The Mauritius sheldgoose (''Alopochen mauritiana''), also known as the Mauritius shelduck, is an extinct species of sheldgoose that was endemic to the island of Mauritius. While geese were mentioned by visitors to Mauritius in the 17th century, few details were provided by these accounts. In 1893, a carpometacarpus wing-bone and a pelvis from the Mare aux Songes swamp were used to name a new species of comb duck, ''Sarcidiornis mauritianus''. These bones were connected to the contemporary accounts of geese and later determined to belong to a species related to the Egyptian goose, and placed in the sheldgoose genus ''Alopochen''. The Mauritius and Réunion sheldgoose may have descended from Egyptian geese that colonised the Mascarene islands. One contemporary account states that the Mauritius sheldgoose had wings that were half black and half white, and that they were not very large. It may also be depicted in one illustration. Fossil elements show that it was smaller than the Eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Quaternary Prehistoric Birds
Late Quaternary prehistoric birds are avian taxa that became extinct during the Late Quaternary – the Holocene or Late Pleistocene – and before recorded history, or more precisely, before they could be studied alive by ornithological science. They became extinct before the period of global scientific exploration that started in the late 15th century. In other words, this list basically deals with extinctions between 40,000 BC and 1500 AD. For the purposes of this article, a "bird" is any member of the clade Neornithes, that is, any descendant of the most recent common ancestor of all currently living birds. The birds are known from their remains, which are subfossil (not fossilized, or not completely fossilized). Some are also known from folk memory, as in the case of Haast's eagle in New Zealand. As the remains are not completely fossilized, they may yield organic material for molecular analyses to provide additional clues for resolving their taxonomic affil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malagasy Shelduck
The Malagasy shelduck (''Alopochen sirabensis''), also known as the Sirabe shelduck, is an extinct species of waterfowl in the shelduck subfamily, described from Late Pleistocene fossils found at Antsirabe in central Madagascar. It is related to the extant Egyptian goose, which is widespread in mainland Africa, and to the extinct Réunion and Mauritius shelducks from the Mascarene Islands. The reason for the extinction of the Malagasy shelduck is unknown. Further findings in the Pleistocene sites of Ampasambazimba and Ampoza, and also in the Holocene site of Beloha (where remains were carbon dated to only 1380 ± 90 years BP, 480-660 CE), show that the species was once widespread in Madagascar, inhabiting different biomes, and that it survived the arrival of humans to the island. References Malagasy shelduck Extinct birds of Madagascar Holocene extinctions Malagasy shelduck The Malagasy shelduck (''Alopochen sirabensis''), also known as the Sirabe shelduck, is an ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tadorna
The shelducks, most species of which are found in the genus ''Tadorna'' (except for the Radjah shelduck, which is now found in its own monotypic genus ''Radjah''), are a group of large birds in the Tadorninae subfamily of the Anatidae, the biological family that includes the ducks and most duck-like waterfowl such as the geese and swans. Biology Shelducks are a group of large, often semi-terrestrial waterfowl, which can be seen as intermediate between geese (''Anserinae'') and ducks. They are mid-sized (some 50–60 cm) Old World waterfowl. The sexes are colored slightly differently in most species, and all have a characteristic upperwing coloration in flight: the tertiary remiges form a green speculum, the secondaries and primaries are black, and the coverts (forewing) are white. Their diet consists of small shore animals ( winkles, crabs etc.) as well as grasses and other plants. They were originally known as "sheldrakes", which remained the most common name until the late ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cytochrome B
Cytochrome b within both molecular and cell biology, is a protein found in the mitochondria of eukaryotic cells. It functions as part of the electron transport chain and is the main subunit of transmembrane cytochrome bc1 and b6f complexes. Function In the mitochondrion of eukaryotes and in aerobic prokaryotes, cytochrome b is a component of respiratory chain complex III () — also known as the bc1 complex or ubiquinol-cytochrome c reductase. In plant chloroplasts and cyanobacteria, there is an analogous protein, cytochrome b6, a component of the plastoquinone-plastocyanin reductase (), also known as the b6f complex. These complexes are involved in electron transport, the pumping of protons to create a proton-motive force ( PMF). This proton gradient is used for the generation of ATP. These complexes play a vital role in cells. Structure Cytochrome b/b6 is an integral membrane protein of approximately 400 amino acid residues that probably has 8 transmembrane segments. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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