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Tristramella és un gènere de peixos pertanyent a la família dels cíclids.[3]
Tristramella ist eine zwei Arten umfassende Fischgattung aus der Familie der Buntbarsche (Cichlidae). Sie kommt im Nahen Osten, im See Genezareth, dem Chulasee im oberen Galiläa und im Gebiet des Jordan vor und ist damit nach ihrer Schwestergattung Iranocichla[1] die zweite rein nahöstliche Gattung der Buntbarsche. Populationen in Sümpfen und Teichen rund um Damaskus sind ausgestorben. Die Gattung wurde zu Ehren des englischen Geistlichen, Bibelgelehrten, Forschungsreisenden und Ornithologen Henry Baker Tristram benannt.
Die verschiedenen Arten und Unterarten der Gattung Tristramella erreichen eine Länge von 13 bis 28 cm. In den meisten Fällen haben die Fische 29 Wirbel, seltener 28 oder 30. Charakteristisch für die Gattung ist die spezielle Ausprägung der Gelenkfläche zwischen dem Schädel und den oberen Pharyngealia und die Bezahnung der Pharyngealia. Das vordere Ende der Schwimmblase wird durch eine knöcherne Apophyse gestützt, die vom dritten bis fünften Wirbel ausgeht, mit dem vierten Wirbel als wichtigsten Träger. Meistens ist diese Struktur stark asymmetrisch und linke und rechte Seite der Wirbel haben einen recht unterschiedlichen Anteil daran.
Wie bei allen Buntbarschen der Tribus Oreochromini handelt es sich bei Tristramella-Arten um Maulbrüter.
Die IUCN listet die beiden ausgestorbenen Unterarten Tristramella simonis magdalenae[2] und Tristramella simonis intermedia[3] als eigenständige Arten.
Tristramella ist eine zwei Arten umfassende Fischgattung aus der Familie der Buntbarsche (Cichlidae). Sie kommt im Nahen Osten, im See Genezareth, dem Chulasee im oberen Galiläa und im Gebiet des Jordan vor und ist damit nach ihrer Schwestergattung Iranocichla die zweite rein nahöstliche Gattung der Buntbarsche. Populationen in Sümpfen und Teichen rund um Damaskus sind ausgestorben. Die Gattung wurde zu Ehren des englischen Geistlichen, Bibelgelehrten, Forschungsreisenden und Ornithologen Henry Baker Tristram benannt.
Tristramella is a genus of oreochromines, freshwater fishes in the cichlid family. The members of this genus prefer standing waters and their native range is restricted to the Jordan River system, including Lake Tiberias (Kinneret), in Israel and Syria, with introduced populations in a few other places in Syria.[1] Its members are among the few cichlids native to Western Asia, the others being Astatotilapia flaviijosephi, Coptodon zillii, Iranocichla, Oreochromis aureus, O. niloticus and Sarotherodon galilaeus.[2][3]
Locally, T. simonis remains common and an important part of fisheries, but overall it has declined and it is considered threatened.[4] In contrast, T. sacra has been extinct since 1989–90, possibly due to the disappearance of its breeding habitat, marshes in Lake Tiberias.[5]
Tristramella reach up to 25–28 cm (10–11 in) in total length.[6] Overall they resemble typical tilapias and the Tristramella species differ from each other mainly in details of their teeth, the proportional size of their head and the length of their jaw.[7][8] They feed mostly on phyto– and zooplankton, but also take other small invertebrates, tiny fish, macrophytes and detritus. They are mouthbrooders that lay a relatively small number (up to 250) of relatively large eggs.[8] Although hybrids are well-known among tilapias, hybrids between Tristramella and other tilapias are unknown. Despite both living in Lake Tiberias and them being close relatives, hybridization between T. simonis and the now-extinct T. sacra also is not known to have occurred.[9]
The generic name Tristramella honours the English clergyman and naturalist Henry Baker Tristram (1822-1906) who collected cichlids in Palestine for the British Museum of Natural History.[10] In the past they were included in the genus Tilapia instead.[2]
There are currently two recognized species in this genus:[6]
Two other extinct populations, intermedia of Lake Hula and magdelainae of the vicinity of Damascus,[11][12] are of uncertain taxonomic status.[1] In the past, they were recognized as subspecies of T. simonis by FishBase and they are still recognized as valid, separate species by the IUCN, which however has not reviewed their status since 2006.[11][12] Today FishBase and Catalog of Fishes consider both intermidia and magdelainea as synonyms of T. simonis.[6][13]
Tristramella is a genus of oreochromines, freshwater fishes in the cichlid family. The members of this genus prefer standing waters and their native range is restricted to the Jordan River system, including Lake Tiberias (Kinneret), in Israel and Syria, with introduced populations in a few other places in Syria. Its members are among the few cichlids native to Western Asia, the others being Astatotilapia flaviijosephi, Coptodon zillii, Iranocichla, Oreochromis aureus, O. niloticus and Sarotherodon galilaeus.
Locally, T. simonis remains common and an important part of fisheries, but overall it has declined and it is considered threatened. In contrast, T. sacra has been extinct since 1989–90, possibly due to the disappearance of its breeding habitat, marshes in Lake Tiberias.
Tristramella reach up to 25–28 cm (10–11 in) in total length. Overall they resemble typical tilapias and the Tristramella species differ from each other mainly in details of their teeth, the proportional size of their head and the length of their jaw. They feed mostly on phyto– and zooplankton, but also take other small invertebrates, tiny fish, macrophytes and detritus. They are mouthbrooders that lay a relatively small number (up to 250) of relatively large eggs. Although hybrids are well-known among tilapias, hybrids between Tristramella and other tilapias are unknown. Despite both living in Lake Tiberias and them being close relatives, hybridization between T. simonis and the now-extinct T. sacra also is not known to have occurred.
The generic name Tristramella honours the English clergyman and naturalist Henry Baker Tristram (1822-1906) who collected cichlids in Palestine for the British Museum of Natural History. In the past they were included in the genus Tilapia instead.
Tristramella est un genre de poissons Perciformes qui appartient à la famille des Cichlidae.
Selon FishBase (26 janv. 2017)[1] :
Tristramella est un genre de poissons Perciformes qui appartient à la famille des Cichlidae.
Tristramella is een geslacht van straalvinnige vissen uit de familie van cichliden (Cichlidae).
Tristramella is een geslacht van straalvinnige vissen uit de familie van cichliden (Cichlidae).
Tristramella er en gruppe ciklider. De er fisk som lever i ferskvann i Israel og Syria.
Tristramella intermedia og Tristramella magdelainae er utryddet på grunn av tap av habitat. Tristramella simonis er truet av samme grunn. Tristramella sacra er også truet.
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Tristramella er en gruppe ciklider. De er fisk som lever i ferskvann i Israel og Syria.
Tristramella intermedia og Tristramella magdelainae er utryddet på grunn av tap av habitat. Tristramella simonis er truet av samme grunn. Tristramella sacra er også truet.
Multimedia w Wikimedia Commons Tristramella – rodzaj słodkowodnych ryb okoniokształtnych z rodziny pielęgnicowatych (Cichlidae).
Wszystkie ryby z tego rodzaju są pyszczakami – inkubują ikrę w pysku. Wraz z rodzajami Oreochromis, Sarotherodon i Iranocichla tworzą takson monofiletyczny[2][3].
Gatunki zaliczane do tego rodzaju [4]:
Dwa podgatunki T. simonis : T. simonis intermedia i T. simonis magdalenae są czasem traktowane jako odrębne gatunki.[potrzebny przypis]
Gatunkiem typowym rodzaju jest Hemichromis sacra, obecnie synonim Tristramella sacra.
Tristramella – rodzaj słodkowodnych ryb okoniokształtnych z rodziny pielęgnicowatych (Cichlidae).
Wszystkie ryby z tego rodzaju są pyszczakami – inkubują ikrę w pysku. Wraz z rodzajami Oreochromis, Sarotherodon i Iranocichla tworzą takson monofiletyczny.
