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Rhabdosargus Holubi
''Rhabdosargus holubi'', the Cape stumpnose, is a species of fish in the seabream family, Sparidae. It is native to southern Africa, where it can be found mainly along the eastern coast of South Africa.Blaber, S.J.M. (1974)The ecology of juvenile ''Rhabdosargus holubi'' (Steinachner) (Teleostei : Sparidae). (Thesis). Rhodes University.De Wet, P.S. & Marais, J.F.K. (1990)Stomach content analysis of juvenile Cape stumpnose ''Rhabdosargus holubi'' in the Swartkops Estuary, South Africa.''South African Journal of Marine Science, 9 (1): 127-133.'' This fish is usually around 15 centimeters long, but specimens of 40 centimeters have been seen. It is a shiny silver fish with a gold line from head to tail. The dorsal fin has 11 spines. The head is blunt and the mouth contains 6 to 8 incisors. The incisors of the juvenile have cusps.Branch, G.M., Griffiths, C. & Beckley, L. (2008):''Two Oceans: A Guide to the Marine Life of Southern Africa''. Struik. pg. 246. This species is a marine fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franz Steindachner
Franz Steindachner (11 November 1834 in Vienna – 10 December 1919 in Vienna) was an Austrian Zoology, zoologist, ichthyologist, and herpetologist. He published over 200 papers on fishes and over 50 papers on reptiles and amphibians. Steindachner described hundreds of new species of fish and dozens of new amphibians and reptiles. At least seven species of reptile have been named after him. Work and career Being interested in natural history, Steindachner took up the study of fossil fishes on the recommendation of his friend Eduard Suess (1831–1914). In 1860 he was appointed to the position of director of the fish collection at the Naturhistorisches Museum, a position which had remained vacant since the death of Johann Jakob Heckel (1790–1857). (in German). Steindachner's reputation as an Ichthyology, ichthyologist grew, and in 1868 he was invited by Louis Agassiz (1807–1873) to accept a position at the Museum of Comparative Zoology at Harvard University. Steindachner took ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryozoa
Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about long, they have a special feeding structure called a lophophore, a "crown" of tentacles used for filter feeding. Most marine bryozoans live in tropical waters, but a few are found in oceanic trenches and polar waters. The bryozoans are classified as the marine bryozoans (Stenolaemata), freshwater bryozoans (Phylactolaemata), and mostly-marine bryozoans (Gymnolaemata), a few members of which prefer brackish water. 5,869living species are known. At least two genera are solitary (''Aethozooides'' and ''Monobryozoon''); the rest are colonial. The terms Polyzoa and Bryozoa were introduced in 1830 and 1831, respectively. Soon after it was named, another group of animals was discovered whose filtering mechanism looked similar, so it was included in Bryozoa until 1869, when the two groups were no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhabdosargus
''Rhabdosargus'' is a genus of fish in the family Sparidae. Species There are currently 6 recognized species in this genus: * '' Rhabdosargus globiceps'' Valenciennes Valenciennes (, also , , ; nl, label=also Dutch, Valencijn; pcd, Valincyinnes or ; la, Valentianae) is a commune in the Nord department, Hauts-de-France, France. It lies on the Scheldt () river. Although the city and region experienced a ..., 1830 (White stumpnose) * '' Rhabdosargus haffara'' Forsskål, 1775 (Haffara seabream) * '' Rhabdosargus holubi'' Steindachner, 1881 (Cape stumpnose) * '' Rhabdosargus niger'' F. Tanaka & Iwatsuki, 2013 (Blackish stumpnose) Tanaka, F. & Iwatsuki, Y. (2013):''Rhabdosargus niger'' (Perciformes: Sparidae), a new sparid species from Indonesia, with taxonomic status of the nominal species synonymized under ''Rhabdosargus sarba''. ''Ichthyological Research, 60 (4): 343-352.'' * '' Rhabdosargus sarba'' Forsskål, 1775 (Goldlined seabream) * '' Rhabdosargus thorpei'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Krom River
Krom River or Kromme River ( af, Krommerivier) is a river in the Eastern Cape Province in South Africa. The river flows into the Indian Ocean through an estuary on the north side of St Francis Bay, west of Port Elizabeth. The Krom river flows in an ESE direction and is approximately 109 km long with a catchment area of 1,085 km. The Churchill Dam and the Impofu Dam are dams on the Krom River. The latter is located near Humansdorp. Presently this river is part of the Fish to Tsitsikama Water Management Area. Ecology In 1995 specimens of the Cape galaxias ''(Galaxias zebratus)'', a South African fish species endemic to the Cape Floristic Region, were found in the Krom River. Until then it had been thought that its distribution was restricted to the area between the Keurbooms and the Olifants River. Although in South Africa this relatively delicate fish is only classified as near threatened, in Australia species of the same genus were driven to extinction by competing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swartkops River
Swartkops River, also Zwartskop River, (Afrikaans: ''black hills'') is a watercourse in the Eastern Cape province of South Africa. The source of the Swartkops is near Cockscombe Mountain, and it flows east into the Algoa Bay of the Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by th .... Its two main tributaries are the northern Kwa-Zunga River and the southern Elands River. The river is also fed by Motherwell Canal, Markman Canal, and Chatty River, which are also sources of water pollution. The river's Groendal Dam was constructed in 1933. The Swartzkops watershed lies with the Uitenhage Artesian Basin. The river suffers from sewage pollution, litter, and algae blooms. References {{coord missing, South Africa Rivers of the Eastern Cape af:Swartkopsrivier [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kasouga Estuary
Kasouga or Kasuka is a small village in Sarah Baartman District Municipality in the Eastern Cape province of South Africa. Settlement some 10 km north-east of Kenton-on-Sea, near the mouth of the Kasuka River. The name is derived from Khoekhoen and means 'place of many leopard The leopard (''Panthera pardus'') is one of the five extant species in the genus '' Panthera'', a member of the cat family, Felidae. It occurs in a wide range in sub-Saharan Africa, in some parts of Western and Central Asia, Southern Russia, a ...s'. The river name "Kasuka" is a Xhosa adaptation of the word, and has the same meaning. References {{Sarah Baartman District Municipality Populated places in the Ndlambe Local Municipality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kowie River
The Kowie River (Coyi in Xhosa) is a river in the Eastern Cape, South Africa. It has its source in the hills of the "Grahamstown Heights" from where it flows in a south-easterly direction draining the major part of the Bathurst region, reaching the Indian Ocean through an estuary at Port Alfred. Its major tributaries are the Bloukrans River, the Bak River and the Lushington River (or Torrens). The Little Kowie River is a smaller tributary which enters the estuarine portion of the river 14 km from the mouth. There are also a number of smaller unnamed streams entering the river along its course. The Kowie river is part of the Fish to Tsitsikama Water Management Area. Ecology There is a small population of the endangered Eastern Province rocky ''(Sandelia bainsii)'' in the Kowie river. See also * List of rivers of South Africa * List of reservoirs and dams in South Africa The following is a partial list of dams in South Africa. __NOTOC__ In South African English (as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychaete
Polychaeta () is a paraphyletic class (biology), class of generally marine invertebrate, marine annelid worms, common name, commonly called bristle worms or polychaetes (). Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. More than 10,000 species are described in this class. Common representatives include the lugworm (''Arenicola marina'') and the Alitta virens, sandworm or Alitta succinea, clam worm ''Alitta''. Polychaetes as a class are robust and widespread, with species that live in the coldest ocean temperatures of the abyssal plain, to forms which tolerate the extremely high temperatures near hydrothermal vents. Polychaetes occur throughout the Earth's oceans at all depths, from forms that live as plankton near the surface, to a 2- to 3-cm specimen (still unclassified) observed by the robot ocean probe Nereus (underwater vehicle), ''Nereus'' at the bottom of the Challenger Deep, the deepes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphipoda
Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far described. They are mostly marine animals, but are found in almost all aquatic environments. Some 1,900 species live in fresh water, and the order also includes the terrestrial sandhoppers such as ''Talitrus saltator''. Etymology and names The name ''Amphipoda'' comes, via New Latin ', from the Greek roots 'on both/all sides' and 'foot'. This contrasts with the related Isopoda, which have a single kind of thoracic leg. Particularly among anglers, amphipods are known as ''freshwater shrimp'', ''scuds'', or ''sideswimmers''. Description Anatomy The body of an amphipod is divided into 13 segments, which can be grouped into a head, a thorax and an abdomen. The head is fused to the thorax, and bears two pairs of antennae and one pair of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diatom
A diatom (Neo-Latin ''diatoma''), "a cutting through, a severance", from el, διάτομος, diátomos, "cut in half, divided equally" from el, διατέμνω, diatémno, "to cut in twain". is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of the Earth's biomass: they generate about 20 to 50 percent of the oxygen produced on the planet each year, take in over 6.7 billion metric tons of silicon each year from the waters in which they live, and constitute nearly half of the organic material found in the oceans. The shells of dead diatoms can reach as much as a half-mile (800 m) deep on the ocean floor, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by transatlantic winds from the African Sahara, much of it from the Bodélé Depression, which was once made up of a system of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
