Lifespan, longevity, and ageing
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Maximum longevity: 17 years (captivity)
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- Joao Pedro de Magalhaes
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Diseases and Parasites
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Ergasilus Disease 6. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Fish Louse Infestation 7. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Fish Louse Infestation 6. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Thwaitia Infestation. Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Acanthostomum Infestation 2. Parasitic infestations (protozoa, worms, etc.)
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Quadriacanthus Infestation. Parasitic infestations (protozoa, worms, etc.)
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Astiotrema Infestation. Parasitic infestations (protozoa, worms, etc.)
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Acanthostomum Infestation. Parasitic infestations (protozoa, worms, etc.)
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Lernaeid Infestation (larval Lernaeid). Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Procamallanus Infection 14. Parasitic infestations (protozoa, worms, etc.)
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Diagnostic Description
(
anglais
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Diagnosis: head much depressed, often ridged (Ref. 4903), roundly pointed when viewed from above (Ref. 28714). Head width 1.6-2.2 times in head length (Ref. 28714, 57125) or 47.5-63% HL (Ref. 81641). Body rather elongate, 5-6 times longer than deep (Ref. 7324, 57125). Premaxillary tooth plate 6-7 times as long as broad, a little shorter than the vomerine tooth plate (Ref. 43434). Occipital process 4-6 times longer than broad (Ref. 57125). 9-11 branched dorsal-fin rays (Ref. 57125), the first prolonged into short filaments (Ref. 13851, 31256, 57125). Longest filament comprised 3-4 times in standard length (Ref. 7324, 57125). Predorsal length 2.4-2.6 times in standard length (Ref. 57125). Adipose fin long, its origin well in front of the anal fin (Ref. 28714), narrowly separated from dorsal fin (Ref. 43434). Width of premaxillary tooth plate 2.5-2.8 times in head length (Ref. 57125). Lobes of caudal fin often with short filaments (Ref. 7324, 13851, 57125). Upper caudal-fin lobe comprised 2-3 times in standard length (Ref. 57125).Description: supralateral eyes with a free orbital margin (Ref. 367, 11410). Posterior and anterior nostrils remote from each other, the posterior being provided with a barbel (Ref. 11410). Nasal barbel 0.3-0.6 times the head length (Ref. 367). Maxillary barbel reaching ventral or anal fin (Ref. 43434). External mandibular barbel 0.7-1.1 times head length; internal mandibular barbel 1.7-2.1 times head length (Ref. 367). Occipital processus in contact with the first interneural (Ref. 42499, Ref. 2756). Dorsal fin with smooth spine (Ref. 367). Last ray of dorsal fin behind inner ray of ventral fin (Ref. 4912). Adipose fin height 2.5 times in length of its base (Ref. 3036) and its length twice as long as rayed dorsal fin, narrowly separated one from another (Ref. 43434). Pectoral spine as long as dorsal spine and with serrations at the inside (Ref. 367, 2756). No pectoral filaments (Ref. 2756, 3036). Pelvic fins inserted under 5th or 6th branched ray of dorsal fin (Ref. 3036, 13851). Lateral line system consists of a straight line of tubular elevations, from the scapulare to the middle of the caudal fin (Ref. 562). Coloration: life specimens yellow-greenish or blackish with white belly (Ref. 7324, 13851, 57125). Fins darker, sometimes reddish purple; juveniles with little black spots on the sides (Ref. 7324, 57125).
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Diseases and Parasites
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Eustrongylides Disease (larvae). Parasitic infestations (protozoa, worms, etc.)
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Diseases and Parasites
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Phyllodistomum Infestation 7. Parasitic infestations (protozoa, worms, etc.)
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Life Cycle
(
anglais
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Reproduction takes place during high water (Ref. 2756). There is some indication that the species comes to shallower water to breed (Ref. 43507). From 4 breeding fish taken, 3 were from inshore waters and 1 from 40m depth in the open water (Ref. 49805). The nest is a relatively large depression with the shape of a flat dish and proportions relative to the size of the fish (Ref. 51638). A single well formed hole of about 10-15cm in diameter and 10-15cm depth is present nearly in the middle (Ref. 51638). Eggs are laid inside this hole (Ref. 51638). Eggs are white, having a diameter of little more than 1 millimeter (Ref. 45962). Larvae stay in the hole a couple of days after hatching (Ref. 51638). They swim above the nest when disturbed and return to hole after disturbance has stopped (Ref. 51638).
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Migration
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anglais
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Potamodromous. Migrating within streams, migratory in rivers, e.g. Saliminus, Moxostoma, Labeo. Migrations should be cyclical and predictable and cover more than 100 km.
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Morphology
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anglais
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Dorsal spines (total): 1; Dorsal soft rays (total): 8 - 12; Analspines: 0; Analsoft rays: 13 - 15; Vertebrae: 48 - 53
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Trophic Strategy
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anglais
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Post-larval B. bajad feed on copepods (Ref. 27490). Small fish (immature) take a mixed food of organic detritus, crustaceans and fish (Ref. 51638). Adults feed on insects, fish and plants (Ref. 6160), crustaceans and molluscs (Ref. 28714), or are exclusively piscivorous (Ref. 31256). In small specimens the percentage of insects declines with increasing body size, while that of shrimps increases; for individuals larger than 24cm the trends reverse (Ref. 33614). Lives and feeds on or near the bottom (Ref. 3034, Ref. 33614). Avoids salt water (Ref. 31439).
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Biology
(
anglais
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Found in lakes, swamps and rivers (Ref. 31256). Avoids salt water (Ref. 31439). Spends nearly the whole of the daylight hours in crevices of rocks and is therefor seldom seen (Ref. 51850). Lives and feeds on or near the bottom (Ref. 3034). Adults exclusively piscivorous (Ref. 31256). Preys on small fish, particularly Alestes spp. (Ref. 13851), or Chrysichthys auratus as in Lake Kainji (Ref. 3034), but also feeds on insects, crustaceans and molluscs (some debris and vegetable matter may also be ingested) (Ref. 28714). Efficiency of catching prey catfish is maximised by face to face attack, avoiding damage by dorsal and pectoral spines of the prey (Ref. 33614). There is some indication that the species comes to shallower water to breed (Ref. 43507). Spawning season extends from April to July (Ref. 51850). Parents build and guard the nest, which is like a flat disc with a central hole where the eggs are dropped; size of the nest and the central hole depend on the fish size (Ref. 51638). Males become up to 7 years old, females 8 years (Ref. 51644). Mean sizes and weight of males are less than those of females from the same age (Ref. 51644, 51645). An important food fish. Flesh is good eating and of economic importance (Ref. 36900), commonly sold as food (Ref. 43521). Reputed to reach 100,000 g.
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Importance
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fisheries: commercial; gamefish: yes
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Bagrus bajad
(
catalan ; valencien
)
fourni par wikipedia CA
Bagrus bajad és una espècie de peix de la família dels bàgrids i de l'ordre dels siluriformes.
Morfologia
Els mascles poden assolir els 112 cm de longitud total.[3][4]
Distribució geogràfica
Es troba a Àfrica: rius Nil, Senegal, Sanaga i Níger, i llacs Txad, Albert i Turkana.[3]
Referències
-
↑ Bosc L. A. G. 1816-1819. (Pisces accounts.) A Nouveau Dictionnaire d'Histoire Naturelle..., Nouv. Ed. Paris. Nouv. Dict. Hist. Nat. v. 1-36.
-
↑ BioLib (anglès)
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↑ 3,0 3,1 FishBase (anglès)
-
↑ Abdel-Latif, A.-F. 1974. Fisheries of Lake Nasser. Aswan Regional Planning, Lake Nasser Development Centre, Assuan, Egipte. 235 p.
Bibliografia
- Bailey, R. M. i D. J. Stewart 1983: Bagrus Bosc, 1816 (Pisces, Siluriformes): Proposal to place on the Official List. Z.N.(S.)2371. Bulletin of Zoological Nomenclature v. 40 (pt 3): 167-172.
- 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 (Califòrnia, 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)
- Forsskål, P. 1775. Descriptiones animalium avium, amphibiorum, piscium, insectorum, vermium; quae in itinere orientali observavit... Post mortem auctoris edidit Carsten Niebuhr. Hauniae. Descr. Animalium: 1-20 + i-xxxiv + 1-164, map.
- 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.: Fishes of the World, 3a edició. Nova York, Estats Units: John Wiley and Sons. Any 1994.
- Risch, L.M. 1986. Bagridae. p. 2-35. A J. Daget, J.-P. Gosse i D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussel·les; MRAC, Tervuren; i ORSTOM, París. Vol. 2.
- Wheeler, A.: The World Encyclopedia of Fishes, 2a edició, Londres: Macdonald. Any 1985.
Enllaços externs
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Bagrus bajad: Brief Summary
(
catalan ; valencien
)
fourni par wikipedia CA
Bagrus bajad és una espècie de peix de la família dels bàgrids i de l'ordre dels siluriformes.
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Bayad
(
anglais
)
fourni par wikipedia EN
The bayad (Bagrus bajad), is a species of bagrid catfish from Africa.[2]
Distribution
The natural habitat of the bayad are lakes and rivers in Africa. These include lakes such as Lake Chad, Lake Albert, and Lake Turkana, as well as rivers such as the Nile, the Niger, and the Senegal.
Description
The bayad's body is generally elongated in shape. The dorsal fin has a smooth spine, and the pectoral fins have spines with serrations on the inside. There are four pairs of barbel anatomy barbels. The maxillary barbels usually reach to the ventral fin or pelvic fins. This fish is yellow-greenish or blackish with a white belly. The fins are darker, sometimes reddish purple. Juveniles have little black spots on the sides.[3]
The bayad has a maximum size of about 112 centimetres (44.1 in) FL. It has a maximum published weight of 12.5 kilograms (27.5 lb), but is reputed to reach 100 kg (220 lb). Mean sizes and weight of males are less than those of females from the same age. Males grow up to 7 years old, females 8 years (Ref. 51644).[3]
Ecology
The bayad is found in lakes, swamps and rivers. It avoids salt water. This species spends nearly the whole of the daylight hours in crevices of rocks and is therefore seldom seen. It lives and feeds on or near the bottom.[3] Adults are exclusively piscivorous; it preys on small fish, particularly Alestes species, or Chrysichthys auratus as in Lake Kainji. These fish also feed on insects, crustaceans, mollusks, and vegetable matter. The efficiency of catching prey catfish is maximised by face to face attack, avoiding damage by dorsal and pectoral spines of the prey.[3]
There is some indication that the species comes to shallower water to breed. Spawning season extends from April to July. The parents build and guard the nest, which is like a flat disc with a central hole where the eggs are dropped; the size of the nest and the central hole depend on the fish size.
Relationship to humans
The bayad is an important food fish. The bayad flesh is good eating and is of economic importance, commonly sold as food.[3]
References
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^ Dankwa, H.; Azeroual, A.; Entsua-Mensah, M.; Getahun, A.; Lalèyè, P.; Ntakimazi, G. (2020). "Bagrus bajad". IUCN Red List of Threatened Species. 2020: e.T60740A47212769. doi:10.2305/IUCN.UK.2020-3.RLTS.T60740A47212769.en. Retrieved 12 November 2021.
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^ Ferraris, Carl J. Jr. (2007). "Checklist of catfishes, recent and fossil (Osteichthyes: Siluriformes), and catalogue of siluriform primary types" (PDF). Zootaxa. 1418: 1–628. doi:10.11646/zootaxa.1418.1.1.
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^ a b c d e Froese, Rainer; Pauly, Daniel (eds.) (2007). "Bagrus bajad" in FishBase. Aug 2007 version.
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Bayad: Brief Summary
(
anglais
)
fourni par wikipedia EN
The bayad (Bagrus bajad), is a species of bagrid catfish from Africa.
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Bagrus bajad
(
espagnol ; castillan
)
fourni par wikipedia ES
Bagrus bajad es una especie de peces de la familia Bagridae en el orden de los Siluriformes.
Morfología
• Los machos pueden llegar alcanzar los 112 cm de longitud total.[2][3]
Distribución geográfica
Se encuentran en África: ríos Nilo, Senegal, Sanaga y Níger, y lagos Chad, lago Alberto y Turkana.
Referencias
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.
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Bagrus bajad: Brief Summary
(
espagnol ; castillan
)
fourni par wikipedia ES
Bagrus bajad es una especie de peces de la familia Bagridae en el orden de los Siluriformes.
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Bagrus bajad
(
basque
)
fourni par wikipedia EU
(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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Bagrus bajad: Brief Summary
(
basque
)
fourni par wikipedia EU
Bagrus bajad Bagrus generoko animalia da. Arrainen barruko Actinopterygii klasean sailkatzen da, Bagridae familian.
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Bagrus bajad
(
néerlandais ; flamand
)
fourni par wikipedia NL
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Bagrus bajad
(
vietnamien
)
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Bagrus bajad: Brief Summary
(
vietnamien
)
fourni par wikipedia VI
Bayad بياض, Bagrus bajad, là một loài cá da trơn trong họ Bagridae.
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巴佳鱨
(
chinois
)
fourni par wikipedia 中文维基百科
二名法 Bagrus bajadForsskål, 1775 巴佳鱨，為輻鰭魚綱鯰形目鱨科的其中一種，為熱帶淡水魚類，分布於非洲尼羅河、乍得湖、塞內加爾河、尼日河流域，本魚體延長，頭扁且平滑，體黃綠色，腹部白色，魚鰭深色，稚魚體側有斑點，體長一般50公分，最大可達125公分，背鰭硬棘1枚;背鰭軟條8-12枚;臀鰭軟條13-15枚，棲息在溪流、湖泊及沼澤底層水域，平常躲藏於岩石縫隙中，以其他魚類為食，繁殖期在每年4月至7月，親魚會築巢守護卵，為當地重要的食用魚。
参考文献
扩展阅读
巴佳鱨: Brief Summary
(
chinois
)
fourni par wikipedia 中文维基百科
巴佳鱨，為輻鰭魚綱鯰形目鱨科的其中一種，為熱帶淡水魚類，分布於非洲尼羅河、乍得湖、塞內加爾河、尼日河流域，本魚體延長，頭扁且平滑，體黃綠色，腹部白色，魚鰭深色，稚魚體側有斑點，體長一般50公分，最大可達125公分，背鰭硬棘1枚;背鰭軟條8-12枚;臀鰭軟條13-15枚，棲息在溪流、湖泊及沼澤底層水域，平常躲藏於岩石縫隙中，以其他魚類為食，繁殖期在每年4月至7月，親魚會築巢守護卵，為當地重要的食用魚。
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