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Alcolapia
''Alcolapia'' is a genus of small fishes in the family Cichlidae. Their native range is restricted to margins of Lake Natron and Lake Magadi, as well as similar conditions in nearby hot springs, in Kenya and Tanzania. They live in waters that are warm (mostly , although occasionally down to ), hypersaline (salinity above 40‰) and alkaline ( pH above 10). Species from this genus have also been introduced to Lake Nakuru and Lake Elmenteita. They are the only fish in their range. The different ''Alcolapia'' species differ primarily in the position of their mouth (straight, upturned or downturned) and the colors of the adult males. They are fairly small fish, with the largest species reaching up to in standard length. They mostly feed on algae and cyanobacteria, but also take other plant material, fish eggs, fry and remains, and insects in smaller quantities (except ''A. alcalica'', which feed on other plant material at about the same level as algae and cyanobacteria). They are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcolapia Grahami
''Alcolapia grahami'', the Lake Magadi tilapia or Graham's cichlid, is a vulnerable species of fish in the family Cichlidae. It is specialised to live in hot, alkaline waters in springs and lagoons around hypersaline lakes. Description ''Alcolapia grahami'' is sexually dimorphic, the mature females are golden in colour while the males have pale blue flanks. In the mature males the sides of the mouth have swollen, brilliant white patches and blue iridescent spots on their scales. The males' genital papillae are obvious, conical in shape and bright yellow, those of the females are swollen. The breeding male has a very dark, black bar through its eyes and this is duller in females. Distribution It is endemic to the hypersaline, warm and highly alkaline Lake Magadi in Kenya where it is the only fish. It has also been introduced to Lake Elmenteita and Lake Nakuru in Kenya, and Lake Natron in Tanzania, although it does not appear to have become established in Natron. Habitat and eco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcolapia Alcalica
''Alcolapia alcalica'', the common Natron tilapia or soda cichlid, is an endangered species of fish in the family Cichlidae. It is endemic to the hypersaline, warm Lake Natron in Ngorongoro District of Arusha Region Arusha City is a Tanzanian city and the regional capital of the Arusha Region, with a population of 416,442 plus 323,198 in the surrounding Arusha District Council (2012 census). Located below Mount Meru on the eastern edge of the eastern ..., its Drainage basin, drainage and the Shombole Swamps in Kenya and Tanzania. This species typically has an essentially terminal (straight) mouth, but a Polymorphism (biology), morph with an upturned mouth is found locally in eastern Lake Natron, where it co-occurs with the normal morph. ''Alcolapia latilabris, A. latilabris'' and ''Alcolapia ndalalani, A. ndalalani'', the two other species in Lake Natron, both have a clearly downturned mouth. Territory (animal), Territorial males of ''A. alcalica'' have extensive blue-wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcolapia Latilabris
''Alcolapia latilabris'', the wide-lipped Natron tilapia, is a species of small fish in the family Cichlidae. It is endemic to the hypersaline, warm Lake Natron in Tanzania. It lives near springs in the southern part of the lake. It reaches up to in standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish .... It has a relatively broad, downturned mouth, which separates it from the two other fish in Lake Natron, '' A. alcalica'' and '' A. ndalalani''. References latilabris Fish described in 1999 Taxa named by Lothar Seegers {{Tilapiini-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcolapia Ndalalani
''Alcolapia ndalalani'', the narrow-mouthed Natron tilapia, is a species of small fish in the family Cichlidae. It is endemic to the hypersaline, warm Lake Natron in Tanzania. Here it lives in creeks and springs at the southern shores of the lake. It reaches up to in standard length Fish measurement is the measuring of individual fish and various parts of their anatomies. These data are used in many areas of ichthyology, including taxonomy and fisheries biology. Overall length * Standard length (SL) is the length of a fish .... It has a relatively narrow, downturned mouth, which separates it from the two other fish in Lake Natron, '' A. alcalica'' and '' A. latilabris''. References ndalalani Fish described in 1999 Taxa named by Lothar Seegers {{Tilapiini-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreochromis
''Oreochromis'' is a large genus of oreochromine cichlids, fishes endemic to Africa and the Middle East. A few species from this genus have been introduced far outside their native range and are important in aquaculture. Many others have very small ranges; some are seriously threatened, and ''O. ismailiaensis'' and ''O. lidole'' possibly are extinct. Although ''Oreochromis'' primarily are freshwater fish of rivers, lakes and similar habitats, several species can also thrive in brackish waters and some even survive in hypersaline conditions with a salinity that far surpasses that of seawater. In addition to overfishing and habitat loss, some of the more localized species are threatened by the introduction of other, more widespread ''Oreochromis'' species into their ranges. This is because they—in addition to competing for the local resources—often are able to hybridize. ''Oreochromis'' are fairly robust fish, and medium–small to very large ciclids that can reach up to in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Natron
Lake Natron is a salt or alkaline lake located in north Ngorongoro District of Arusha Region in Tanzania. It is in the Gregory Rift, which is the eastern branch of the East African Rift. The lake is within the Lake Natron Basin, a Ramsar Site wetland of international significance. The lake is fed principally by the Southern Ewaso Ng'iro River, which rises in central Kenya, and by mineral-rich hot springs. It is quite shallow, less than deep, and varies in width depending on its water level. The lake is a maximum of long and wide. The surrounding area receives irregular seasonal rainfall, mainly between December and May totalling per year. Temperatures at the lake are frequently above . High levels of evaporation have left behind natron ( sodium carbonate decahydrate) and trona (sodium sesquicarbonate dihydrate). The alkalinity of the lake can reach a pH of greater than 12. The surrounding bedrock is composed of alkaline, sodium-dominated trachyte lavas that were laid d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oreochromis Amphimelas
''Oreochromis amphimelas'' is a species of tilapia cichlid endemic to north–central Tanzania, where it is found in Lake Manyara and a number of other saline lakes with closed basins. Maximum recorded size is in standard length. Description This is an unusual-looking tilapia: the front part of the head is very short, so it has a small eye, small mouth and short snout. The smaller fish have a rather cylindrical body, but the largest fish have a high, arched back and a concave head profile. The mouth is quite upwardly-angled. The gill arches hold relatively few gill rakers: only 12–16 on the lower part of the outermost arch, the arches lack microbranchiospines and the number of dorsal fin spines is only 12–14, which is rather low compared to other ''Oreochromis''. Females and immatures are a silvery grey, but show little sign of vertical bars on the flanks or a 'tilapia mark' at the base of the soft dorsal fin shown by most other tilapias. Mature males are dark pinkish with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cichlidae
Cichlids are fish from the family Cichlidae in the order Cichliformes. Cichlids were traditionally classed in a suborder, the Labroidei, along with the wrasses ( Labridae), in the order Perciformes, but molecular studies have contradicted this grouping. The closest living relative of cichlids is probably the convict blenny, and both families are classified in the 5th edition of ''Fishes of the World'' as the two families in the Cichliformes, part of the subseries Ovalentaria. This family is both large and diverse. At least 1,650 species have been scientifically described, making it one of the largest vertebrate families. New species are discovered annually, and many species remain undescribed. The actual number of species is therefore unknown, with estimates varying between 2,000 and 3,000. Many cichlids, particularly tilapia, are important food fishes, while others, such as the '' Cichla'' species, are valued game fish. The family also includes many popular freshwater a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Magadi
Lake Magadi is the southernmost lake in the Kenyan Rift Valley, lying in a catchment of faulted volcanic rocks, north of Tanzania's Lake Natron. During the dry season, it is 80% covered by soda and is well known for its wading birds, including flamingos. Lake Magadi is a saline, alkaline lake, approximately 100 square kilometers in size, that lies in an endorheic basin formed by a graben. The lake is an example of a "saline pan". The lake water, which is a dense sodium carbonate brine, precipitates vast quantities of the mineral trona (sodium sesquicarbonate). In places, the salt is up to 40 m thick. The lake is recharged mainly by saline hot springs (temperatures up to 86 °C) that discharge into alkaline "lagoons" around the lake margins, there being little surface runoff in this arid region. Most hot springs lie along the northwestern and southern shorelines of the lake. During the rainy season, a thin (less than 1 m) layer of brine covers much of the saline pan, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Nakuru
Lake Nakuru is one of the Rift Valley lakes at an elevation of above sea level. It lies to the south of Nakuru, in the rift valley of Kenya and is protected by Lake Nakuru National Park. The lake's abundance of algae used to attract a vast quantity of flamingos that famously lined the shore. Other birds also flourish in the area, as do warthogs, baboons and other large mammals. Eastern black rhinos and southern white rhinos have also been introduced. The lake's level dropped dramatically in the early 1990s but has since largely recovered. In 2013, the lake received an alarming increase in the water levels that led to the migration of flamingos to Lake Bogoria in search for food supply. Between 2010-2020 Lake Nakuru increased in surface area from 40 to 68 square kilometres. 677 households, parts of Nakuru town and National Park areas had been flooded. Nakuru means "Dust or Dusty Place" in the Maasai language. Lake Nakuru National Park, close to Nakuru town, was established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danakilia
''Danakilia'' is a genus of cichlids native to northeastern Africa where they are only known from saline lakes, rivers and creeks in the Danakil Depression of Ethiopia and Eritrea. There are two formally described species, along with three undescribed species In taxonomy, an undescribed taxon is a taxon (for example, a species) that has been discovered, but not yet formally described and named. The various Nomenclature Codes specify the requirements for a new taxon to be validly described and name ... currently known. Species There are currently two recognized species in this genus: * '' Danakilia dinicolai'' Stiassny, de Marchi & Lamboj, 2010 * '' Danakilia franchettii'' ( Vinciguerra, 1931) See also * '' Alcolapia'' – another cichlid genus from warm, saline lakes in Africa. References Oreochromini Cichlid genera {{Tilapiini-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lothar Seegers
Lothar Seegers (1947) is a German ichthyologist. As of 2018, Seegers authored 9 species within the family of Rivulidae The Rivulidae are a family of killifishes in the order Cyprinodontiformes. They are commonly known as rivulids, South American killifish or New World killifish. The latter names are slightly misleading, however, as they are neither restricted to .... Publications (selection) * ''The Fishes of the Lake Rukwa Drainage''. Koninklijk Museum voor Midden-Afrika, 1996. * ''Killifishes of the world: Old World Killis II''. A.C.S. GmbH, 1997. * ''Killifishes of the World: New World Killis''. A.C.S., 2000. * ''The catfishes of Africa: A Handbook for Identification and Maintenance''. Aqualog Verlag, 2008. See also * :Taxa named by Lothar Seegers References External links * Living people 1947 births Taxon authorities German ichthyologists 20th-century German zoologists {{Germany-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
