Kwando River System Habitat
(
İngilizce
)
EOL authors tarafından sağlandı
The Kwando River system is generally construed to consist of the upper Kwando originating in the Angolan headwaters, the middle reach Linyanti swamps and the lower reach Chobe River. The blunt-nosed African catfish (Clarias ngamensis) is a demersal species particularly prevalent in the swampy mid reaches of the river system, where heavily vegetated, shallow and slow moving flow regimes persist. Ion concentrations jgenerally in the rapid flowing river mainstem tends to be low in ionic content; however, swampy areas often contain higher concentrations of nitrate and other ionic components. Correspondingly, planktonic content is only appreciable at these slackwater portions of the river, notably in the Linyanti Swamp. The Kwando waters generally exhibit a lower pH level than the neighboring Okavango River, but have a slightly higher sulfate concentration. The largest native demersal fish species in the Kwando is the 117 centimeter (cm) long tiger fish (Hydrocynus vittatus). Other large demersal native species are the 70 cm Kafue pike (Hepsetus odoe), and the 50 cm western bottlenose mormyrid (Mormyrus lacerda} . Each of these demersal vertebrate species are assigned a high trophic level (in the vicinity of level four).
- bibliyografik atıf
- C.Michael Hogan. 2012. Kwando River. Eds. P.Saundry & C.Cleveland. Encyclopedia of Earth. National Council for Science and the Environment. Washington DC
- yazar
- C. Michael Hogan (cmichaelhogan)
Trophic Strategy
(
İngilizce
)
Fishbase tarafından sağlandı
Inhabits swamps and river mouths. Frequency of occurence in Caprivi: frequently in sandy streams, common in standing deep water, abundant in shallow swamps (Ref. 037065). Feed mainly on fish as well as on detritus, plants and benthic invertebrates especially mollusks (Ref. 248, 12597). Uncommon in the Lake Nyasa basin (Ref. 4967).
- Recorder
- Crispina B. Binohlan
Morphology
(
İngilizce
)
Fishbase tarafından sağlandı
Dorsal spines (total): 0; Dorsal soft rays (total): 56 - 62; Analsoft rays: 50 - 58; Vertebrae: 56 - 60
- Recorder
- Crispina B. Binohlan
Migration
(
İngilizce
)
Fishbase tarafından sağlandı
Potamodromous. Migrating within streams, migratory in rivers, e.g. Saliminus, Moxostoma, Labeo. Migrations should be cyclical and predictable and cover more than 100 km.
- Recorder
- Crispina B. Binohlan
Life Cycle
(
İngilizce
)
Fishbase tarafından sağlandı
Breeding is reportedly flood dependent and similar to that of C. gariepinus.
- Recorder
- Crispina B. Binohlan
Diagnostic Description
(
İngilizce
)
Fishbase tarafından sağlandı
Characterized by a relatively long vomerine tooth plate (5.9-14.4 % HL) and by a relatively short adipose fin (5.9-12.5 % SL), the length of which is a specific character of C. ngamensis. Head oval to rectangular in dorsal outline; frontal fontanelle long and narrow (`knife-shaped'); occipital fontanelle small and oval-shaped. Pectoral spine robust and slightly curved. The suprabranchial organ consists of well developed arborescent structures.
- Recorder
- Crispina B. Binohlan
Biology
(
İngilizce
)
Fishbase tarafından sağlandı
The species seems to be nowhere especially abundant but is fairly common in some areas such as weed beds, permanent swamps, quieter waters and muddy bottoms (Ref. 248, 5595). Prefers vegetated habitats. Feeding habits overlap considerably with the sharptooth catfish. Important foods are mollusks, terrestrial and aquatic insects, insect larvae, shrimps, grain, crabs and fish (Ref. 4967, 78218). Feeds on snails (Ref. 5595). Hard-shelled foods such as mussels are crushed before they are swallowed. Breeds during the summer rainy season. May live for 5-6 years (Ref. 7248). Also caught with drawnets (Ref. 4967).
- Recorder
- Crispina B. Binohlan
Importance
(
İngilizce
)
Fishbase tarafından sağlandı
fisheries: commercial; aquaculture: commercial; gamefish: yes; aquarium: commercial
- Recorder
- Crispina B. Binohlan
Stomptandbaber
(
Afrikaans
)
wikipedia AF tarafından sağlandı
Die Stomptandbaber (Clarias ngamensis) is 'n varswater vis wat voorkom in die Kunenerivier, Okavangorivier, die boonste gedeelte van die Zambezirivier, Kafuerivier, Saverivier, onderste gedeelte van Shirerivier, Limpoporivier en Pongolarivier. In Engels staan die vis bekend as Blunttooth catfish.
Voorkoms
Die Stomptandbaber het ‘n plat kop met 4 pare snorbaarde, wat ongeveer 'n kwart van sy lyflengte lank is. Hy het ‘n tandplaat met ‘n tweede halfmaanvormige (wit) plaat daaragter, in die bokaak.
Die rugvin is lank, begin amper net agter die kop, maar hou heelwat voor die stertvin op. Die stertvin is rond en baie goed ontwikkel. ‘n Vetvin is aanwesig tussen die rugvin en die stertvin, maar nie baie duidelik nie. Sy anale vin is lank en hou net voor die stertvin op. Die buikvin is gepaard terwyl die borsvin gepaard en goed ontwikkel is.
Sy liggaamsvorm is lomp, iewat plomper as ‘n skerptandbaber. Hy het mikroskopiese klein skubbe in slym.
Die vis is grys tot donker bruin, swart, van kleur met 'n wit tot room kleurige onderkant. Die vis word 730 mm groot en kan tot 4 kg weeg.
Habitat
Die vis verkies diep, stil poele met goeie en volop skuilplek, verkieslik waterplante. Hy is baie aktief tussen 16h00, regdeur die nag, tot 10h00.
Hy vreet vleis, vis, insekte en wurms, maar aan die klein kant. Hengelaars gebruik ook stadige klein kunsaas en donker loodkoppe.
Algemeen
Hy is baie volop waar hy voorkom maar die meeste hengelaars sien hom aan as ‘n gewone baber (skerptandbaber). Hy is egter baie sterker, meer veglustig, en baklei soos ‘n gewone baber twee maal sy grootte.
Sien ook
Bron
Verwysings
-
↑ uBio (en)
-
↑ Scopoli J. A. 1777. Introductio ad historiam naturalem, sistens genera lapidum, plantarum et animalium hactenus detecta, caracteribus essentialibus donata, in tribus divisa, subinde ad leges naturae. Prague. Introd. Hist. Nat. . i-x + 1-506.
-
↑ BioLib (en)
Eksterne skakel
- lisans
- cc-by-sa-3.0
- telif hakkı
- Wikipedia skrywers en redakteurs
Stomptandbaber: Brief Summary
(
Afrikaans
)
wikipedia AF tarafından sağlandı
Die Stomptandbaber (Clarias ngamensis) is 'n varswater vis wat voorkom in die Kunenerivier, Okavangorivier, die boonste gedeelte van die Zambezirivier, Kafuerivier, Saverivier, onderste gedeelte van Shirerivier, Limpoporivier en Pongolarivier. In Engels staan die vis bekend as Blunttooth catfish.
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Clarias ngamensis
(
Katalanca; Valensiyaca
)
wikipedia CA tarafından sağlandı
Clarias ngamensis és una espècie de peix de la família dels clàrids i de l'ordre dels siluriformes.
Morfologia
Els mascles poden assolir els 73 cm de llargària total.[4][5]
Distribució geogràfica
Es troba a Àfrica.[4]
Referències
-
↑ uBio (anglès)
-
↑ Scopoli J. A. 1777. Introductio ad historiam naturalem, sistens genera lapidum, plantarum et animalium hactenus detecta, caracteribus essentialibus donata, in tribus divisa, subinde ad leges naturae. Prague. Introd. Hist. Nat. . i-x + 1-506.
-
↑ BioLib (anglès)
-
↑ 4,0 4,1 FishBase (anglès)
-
↑ Skelton, P.H. 1993. A complete guide to the freshwater fishes of southern Africa. Southern Book Publishers. 388 p.
Bibliografia
- Burgess, W.E. 1989. An atlas of freshwater and marine catfishes. A preliminary survey of the Siluriformes. T.F.H. Publications, Inc., Neptune City (Estats Units). 784 p.
- Eschmeyer, William N.: Genera of Recent Fishes. California Academy of Sciences. San Francisco (Estats Units). iii + 697. ISBN 0-940228-23-8 (1990).
- Eschmeyer, William N., ed. 1998. Catalog of Fishes. Special Publication of the Center for Biodiversity Research and Information, núm. 1, vol. 1-3. California Academy of Sciences. San Francisco, Califòrnia, Estats Units. 2905. ISBN 0-940228-47-5.
- Ferraris, Carl J.: Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types. Zootaxa, 1418. 8 de març del 2007. ISBN 978-1-86977-058-7. PDF (anglès)
- Helfman, G., B. Collette i D. Facey: The diversity of fishes. Blackwell Science, Malden, Massachusetts (Estats Units), 1997.
- Moyle, P. i J. Cech.: Fishes: An Introduction to Ichthyology, 4a edició, Upper Saddle River, Nova Jersey, Estats Units: Prentice-Hall. Any 2000.
- Nelson, J.S. 2006: Fishes of the world. Quarta edició. John Wiley & Sons, Inc. Hoboken, Nova Jersey, Estats Units. 601 p.
- Teugels, G.G. 1992. Clariidae, p. 468-495. A C. Levêque, D. Paugy, i G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres d'Afrique de l'Ouest Tom 2. Coll. Faune Tropicale núm 28. Musée Royal de l'Afrique Centrale, Tervuren, Bèlgica i O.R.S.T.O.M., París, França.
- Wheeler, A.: The World Encyclopedia of Fishes, 2a edició, Londres: Macdonald. Any 1985.
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- telif hakkı
- Autors i editors de Wikipedia
Clarias ngamensis: Brief Summary
(
Katalanca; Valensiyaca
)
wikipedia CA tarafından sağlandı
Clarias ngamensis és una espècie de peix de la família dels clàrids i de l'ordre dels siluriformes.
- lisans
- cc-by-sa-3.0
- telif hakkı
- Autors i editors de Wikipedia
Clarias ngamensis
(
İspanyolca; Kastilyaca
)
wikipedia ES tarafından sağlandı
Clarias ngamensis es una especie de peces de la familia Clariidae en el orden de los Siluriformes.
Morfología
Los machos pueden llegar alcanzar los 73 cm de longitud total.[2][3]
Distribución geográfica
Se encuentran en África
Referencias
-
↑ Hanssens, M., Kazembe, J., Marshall, B., Moelants, T. & Tweddle, D. (2009). «Clarias ngamensis». Lista Roja de especies amenazadas de la UICN 2010.4 (en inglés). ISSN 2307-8235. Consultado el 20 de noviembre de 2010.
-
↑ FishBase (en inglés)
-
↑ Skelton, P.H. 1993. A complete guide to the freshwater fishes of southern Africa. Southern Book Publishers. 388 p.
Bibliografía
- Eschmeyer, William N., ed. 1998. Catalog of Fishes. Special Publication of the Center for Biodiversity Research and Information, núm. 1, vol. 1-3. California Academy of Sciences. San Francisco, California, Estados Unidos. 2905. ISBN 0-940228-47-5.
- Fenner, Robert M.: The Conscientious Marine Aquarist. Neptune City, Nueva Jersey, Estados Unidos: T.F.H. Publications, 2001.
- Helfman, G., B. Collette y D. Facey: The diversity of fishes. Blackwell Science, Malden, Massachusetts, Estados Unidos, 1997.
- Moyle, P. y J. Cech.: Fishes: An Introduction to Ichthyology, 4a. edición, Upper Saddle River, Nueva Jersey, Estados Unidos: Prentice-Hall. Año 2000.
- Nelson, J.: Fishes of the World, 3a. edición. Nueva York, Estados Unidos: John Wiley and Sons. Año 1994.
- Wheeler, A.: The World Encyclopedia of Fishes, 2a. edición, Londres: Macdonald. Año 1985.
- lisans
- cc-by-sa-3.0
- telif hakkı
- Autores y editores de Wikipedia
Clarias ngamensis: Brief Summary
(
İspanyolca; Kastilyaca
)
wikipedia ES tarafından sağlandı
Clarias ngamensis es una especie de peces de la familia Clariidae en el orden de los Siluriformes.
- lisans
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Clarias ngamensis
(
Baskça
)
wikipedia EU tarafından sağlandı
(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Clarias ngamensis: Brief Summary
(
Baskça
)
wikipedia EU tarafından sağlandı
Clarias ngamensis Clarias generoko animalia da. Arrainen barruko Clariidae familian sailkatzen da.
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Clarias ngamensis
(
Fince
)
wikipedia FI tarafından sağlandı
Clarias ngamensis on ankeriaismonneihin kuuluva kalalaji. Sitä tavataan laajalla alueella Afrikan eteläpuoliskon joissa ja järvissä. Se elää erityisesti kasvillisuuden valtaamissa vesissä.
Ulkonäkö ja koko
Clarias ngamensis on pitkulainen kala, jonka väri vaihtelee harmaasta tummanruskeaan. Väri on usein kirjava, ja sekä pään alapuoli että vatsa ovat kermanväriset tai valkeahkot. C. ngamensis voi saavuttaa 73 senttimetrin pituuden ja painaa 4 kilogrammaa. Sukulaislajistaan jättikonnamonnista lajin voi muun muassa erottaa siitä, että sillä on pieni rasvaevä selkäevän takana.[3] Pään muoto vaihtelee soikeasta suorakulmaiseen.[2]
Levinneisyys ja elinympäristö
C. ngamensis on levinnyt laajalle alueelle Afrikan eteläpuoliskolla. Sitä tavataan Kongon demokraattisesta tasavallasta Etelä-Afrikkaan ulottuvalla alueella. Sitä tavataan Kongojoen altaasta muun muassa Lualaban, Luapulan ja Kasain yläjuoksulta sekä Mweru- ja Bangweulujärvistä. C. ngamensis elää myös Malawijärvessä ja sen valuma-alueella ja Shirejoen yläjuoksulla. Eteläisessä Afrikassa sitä on tavattu Sambesista, Cuandosta, Okavangosta, Cunenesta, Kafuesta, Limpoposta, Savesta ja Pongolasta sekä Ngamijärvestä.[1]
C. ngamensis suosii erityisesti runsaskasvisia ympäristöjä soilla ja tulvatasangoilla.[3]
Käyttäytyminen
C. ngamensis lisääntyy kesän sadekautena, jolloin monet yksilöt siirtyvät matalaan veteen kutemaan. Sukukypsyyden laji saavuttaa noin 25 senttimetrin mittaisena, ja sen elinikä on 5–6 vuotta.[3]
Lajin tärkeimpää ravintoa ovat nilviäiset, hyönteiset, katkaravut, ravut ja kalat. Okavangon suistossa lajin on todettu saalistavan massana yhdessä jättikonnamonnien kanssa.[1]
Lähteet
- Skelton, Paul: A Complete Guide to the Freshwater Fishes of Southern Africa. Cape Town: Struik Publishers, 2001. ISBN 1-86872-643-6. Google-kirjat (viitattu 26.10.2014). (englanniksi)
Viitteet
-
↑ a b c Hanssens, M. & Kazembe, J. & Marshall, B. & Moelants, T. & Tweddle, D.: Clarias ngamensis IUCN Red List of Threatened Species. Version 2014.2. 2010. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 1. marraskuuta 2014. (englanniksi)
-
↑ a b Clarias gariepinus (peilipalvelin) FishBase. Froese, R. & Pauly, D. (toim.). (englanniksi)
-
↑ a b c Skelton, s. 230–231.
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Clarias ngamensis: Brief Summary
(
Fince
)
wikipedia FI tarafından sağlandı
Clarias ngamensis on ankeriaismonneihin kuuluva kalalaji. Sitä tavataan laajalla alueella Afrikan eteläpuoliskon joissa ja järvissä. Se elää erityisesti kasvillisuuden valtaamissa vesissä.
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Clarias ngamensis
(
Felemenkçe; Flemish
)
wikipedia NL tarafından sağlandı
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鈍齒鬍鯰
(
Çince
)
wikipedia 中文维基百科 tarafından sağlandı
鈍齒鬍鯰: Brief Summary
(
Çince
)
wikipedia 中文维基百科 tarafından sağlandı
鈍齒鬍鯰，為輻鰭魚綱鯰形目塘虱魚科的其中一種，分布於非洲中部及東部淡水流域，棲息在沼澤底部水域，屬肉食性，以軟體動物、昆蟲及甲殼類等為食，體長可達73公分，在夏季時繁殖，可做為食用魚、養殖魚類及觀賞魚。
Datos: Q2617081
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