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Lamprologus lethops és una espècie de peix de la família dels cíclids i de l'ordre dels perciformes.
Els mascles poden assolir els 10 cm de longitud total.[3]
Es troba a Àfrica: curs inferior del riu Congo.[3]
Lamprologus lethops és una espècie de peix de la família dels cíclids i de l'ordre dels perciformes.
Lamprologus lethops ist die einzige bisher bekannte blinde Buntbarschart. Sie kommt im unteren Kongo vor. Die einzige bisher bekannte Fundstelle liegt in einem Stromschnellengebiet bei Bulu, westlich von Luozi in der Provinz Bas-Congo. Der Kongo ist an der Fundstelle 45 bis 150 Meter tief und hat dort eine extrem starke Strömung.
Der Holotyp von Lamprologus lethops ist lediglich 2,6 cm lang. Die Körperhöhe des Holotyp beträgt 17,9 % der Standardlänge. Wie die meisten Lamprologini hat Lamprologus lethops einen zylindrischen langgestreckten Körper. Die Augen sind stark reduziert und von dicker Haut überwachsen, der Körper pigmentlos und rosig. Der Kopf ist abgeflacht; die Nasenöffnungen hoch, fleischig und enden in einer gut entwickelten Röhre. Beide Kiefer sind mit einspitzigen, in mehreren Reihen angeordneten Zähnen besetzt. In beiden Kiefern sitzen vorne sechs vergrößerte, nach hinten gebogene Fangzähne. Die Kiemenrechen sind dünn, lang und nicht mit Zähnen besetzt. Auf dem Os lacrimale (Tränenbein) liegen vier Poren des sensorischen Systems. Die Beschuppung der Körperseiten ist irregulär, d. h. die Schuppen stehen nicht in klar erkennbaren, parallel verlaufenden Reihen. Der schuppenlose Bereich auf der Kopfoberseite erstreckt sich nach hinten weit über den Rückenflossenansatz hinaus. Supraneuralia fehlen. Die Flossenstrahlen der Rücken- und der Afterflosse nehmen nach hinten hin in ihrer Höhe zunehmend zu. Beide sind schuppenlos und enden in spitzen Filamenten die bis zur abgerundeten, zum größten Teil beschuppten Schwanzflosse reichen.
Lamprologus lethops ist die einzige bisher bekannte blinde Buntbarschart. Sie kommt im unteren Kongo vor. Die einzige bisher bekannte Fundstelle liegt in einem Stromschnellengebiet bei Bulu, westlich von Luozi in der Provinz Bas-Congo. Der Kongo ist an der Fundstelle 45 bis 150 Meter tief und hat dort eine extrem starke Strömung.
Lamprologus lethops is a species of cichlid fish from areas with fast current in the Congo River in Central Africa, where it is believed to live in depths as great as 160 m (520 ft)[2] or 200 m (660 ft)[3] below the surface. It reaches up to about 12.5 cm (5 in) in standard length,[4] with females being somewhat smaller than males, is all whitish in color (non-pigmented), and essentially blind as adult, as their eyes are covered in a thick layer of skin (only retain a slight sensibility to light).[5][6] This is entirely unique among cichlids and an adaption to the perpetual darkness of its habitat, similar to the adaptions seen in cavefish.[4] The eyes of juveniles are rudimentary and not covered by skin.[6]
L. lethops is almost only known from the mainstream of the lower Congo River in the vicinity of Bulu; however very small numbers have been found up to 20–30 km (12–19 mi) upstream or downstream from this site.[4] The relatively high number of L. lethops that have been found at Bulu is likely due to the unique features at this site, where fast currents go from deep parts of the river to the upper parts. These may on occasion "catch" a deep water fish and force it up, also resulting in gas-bubble disease due to the rapid change in pressure.[4] Consequently, when found at the surface they are usually already dead or die within minutes, although a minority may be saved by a special method where a needle is used to reduce the internal pressure.[4][7] Very small numbers have subsequently been kept in aquaria. Based on these, its behavior is essentially similar to that of its "normal-looking" relatives, like L. congoensis.[6][7] They have laid eggs in aquaria, which however did not hatch.[8]
Among other fish species with similar adaptations (reduced eyes and non-pigmented) found in similar habitats in the Congo River are an elephantfish (Stomatorhinus microps), a clariid catfish (Gymnallabes nops), a mochokid catfish (Chiloglanis sp.), two claroteid catfish (Notoglanidium pallidum and Platyallabes tihoni), and four spiny eels (Mastacembelus aviceps, M. brichardi, M. crassus and M. latens).[9][10] The closely related Lamprologus tigripictilis lives in shallow water in the exact same region as L. lethops, but it has normal pigmentation and eyes.[4]
Lamprologus lethops is a species of cichlid fish from areas with fast current in the Congo River in Central Africa, where it is believed to live in depths as great as 160 m (520 ft) or 200 m (660 ft) below the surface. It reaches up to about 12.5 cm (5 in) in standard length, with females being somewhat smaller than males, is all whitish in color (non-pigmented), and essentially blind as adult, as their eyes are covered in a thick layer of skin (only retain a slight sensibility to light). This is entirely unique among cichlids and an adaption to the perpetual darkness of its habitat, similar to the adaptions seen in cavefish. The eyes of juveniles are rudimentary and not covered by skin.
L. lethops is almost only known from the mainstream of the lower Congo River in the vicinity of Bulu; however very small numbers have been found up to 20–30 km (12–19 mi) upstream or downstream from this site. The relatively high number of L. lethops that have been found at Bulu is likely due to the unique features at this site, where fast currents go from deep parts of the river to the upper parts. These may on occasion "catch" a deep water fish and force it up, also resulting in gas-bubble disease due to the rapid change in pressure. Consequently, when found at the surface they are usually already dead or die within minutes, although a minority may be saved by a special method where a needle is used to reduce the internal pressure. Very small numbers have subsequently been kept in aquaria. Based on these, its behavior is essentially similar to that of its "normal-looking" relatives, like L. congoensis. They have laid eggs in aquaria, which however did not hatch.
Among other fish species with similar adaptations (reduced eyes and non-pigmented) found in similar habitats in the Congo River are an elephantfish (Stomatorhinus microps), a clariid catfish (Gymnallabes nops), a mochokid catfish (Chiloglanis sp.), two claroteid catfish (Notoglanidium pallidum and Platyallabes tihoni), and four spiny eels (Mastacembelus aviceps, M. brichardi, M. crassus and M. latens). The closely related Lamprologus tigripictilis lives in shallow water in the exact same region as L. lethops, but it has normal pigmentation and eyes.
Lamprologus lethops estas specio de Cikledoj, nome fiŝoj el areoj de rapidaj fluejoj en la rivero Kongo en Centra Afriko, kie ĝi supozeble loĝas en profundaĵoj tiom grandaj kiom ĝis 160 m sub la surfaco.[1] Ĝi atingas ĉirkaŭ 10 cm de longo, estas blankeca (ne-pigmentita) kaj blinda.[2] Vivaj L. lethops estis vidataj la unuan fojon en 2011 kiam lokaj fiŝkaptistoj sukcesis alporti kelkajn specimenojn vivaj el profundoj. Ili sekve estis tenitaj en akvario.[3]
Lamprologus lethops estas specio de Cikledoj, nome fiŝoj el areoj de rapidaj fluejoj en la rivero Kongo en Centra Afriko, kie ĝi supozeble loĝas en profundaĵoj tiom grandaj kiom ĝis 160 m sub la surfaco. Ĝi atingas ĉirkaŭ 10 cm de longo, estas blankeca (ne-pigmentita) kaj blinda. Vivaj L. lethops estis vidataj la unuan fojon en 2011 kiam lokaj fiŝkaptistoj sukcesis alporti kelkajn specimenojn vivaj el profundoj. Ili sekve estis tenitaj en akvario.
Lamprologus lethops es una especie de peces de la familia Cichlidae en el orden de los Perciformes.
Los machos pueden llegar alcanzar los 10 cm de longitud total.[1]
Se encuentran en África: curso inferior del río Congo.
Lamprologus lethops Lamprologus generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Cichlidae familian.
Lamprologus lethops Lamprologus generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Cichlidae familian.
Il Lamprologus lethops è una specie di pesce cichlidae del fiume Congo nell'Africa Centrale, dove si ritiene viva in profondità a circa 50 metri sotto la superficie[2] Raggiunge una lunghezza di 10 cm ed è biancastro, non pigmentato e cieco.
Il Lamprologus lethops è una specie di pesce cichlidae del fiume Congo nell'Africa Centrale, dove si ritiene viva in profondità a circa 50 metri sotto la superficie Raggiunge una lunghezza di 10 cm ed è biancastro, non pigmentato e cieco.
Lamprologus lethops is een straalvinnige vissensoort uit de familie van de cichliden (Cichlidae).[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1976 door Roberts & Stewart.
Bronnen, noten en/of referenties
