Schilbe intermedius Rüppell, 1832
Silver catfish
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Schilbe intermedius
Bild av Muséum-Aquarium de Nancy/B. Alenda
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Bild av Muséum-Aquarium de Nancy/B. Alenda
Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
> Siluriformes (Catfishes) > Schilbeidae (Schilbid catfishes)
Etymology: intermedius: Name from the Latin 'intermedius' referring to certain intermediate characters of this species between Schilbe uranoscopus and some specimens of the species itself (Ref. 43912).
More on author: Rüppell.
Etymology: intermedius: Name from the Latin 'intermedius' referring to certain intermediate characters of this species between Schilbe uranoscopus and some specimens of the species itself (Ref. 43912).
More on author: Rüppell.
Taxonomic Remarks
Schilbe intermedius Rüppell 1832 from this species in by van der Bank et al. (2017; Ref. 132362). Until 1990, this species was known as Schilbe mystus, but De Vos and Skelton (1990) have shown, after morphological examination of the holotype of Silurus mystus Linnaeus, 1758, that this specimen belongs to the species generally known as Schilbe (Eutropius) niloticus (Rüppel, 1829); in accordance with the international code of zoological nomenclature, the older name, Schilbe mystus, should substitute the more recent name Schilbe niloticus; hence, the species erroneously considered to be Schilbe mystus, is now called Schilbe intermedius Rüppel, 1832, which is the oldest valid name (Ref. 57127).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi
; sötvatten pelagiska; flodvandrande (Ref. 51243); djupintervall 0 - 60 m (Ref. 34291), usually 0 - 30 m (Ref. 34291). Tropical
Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | Faunafri
Africa: Senegal, Gambia, Casamance, Corubal, Geba, Little Scarcies, Sassandra, Boubo, Bandama, Agnébi, Mé, Comoé, Tano, Pra, Volta basin, Mono, Sio, Ouémé, Ogun, entire Niger and Chad basins, Cross, Wouri and Sanaga; absent between Little Scarcies and Sassandra; further in the entire Congo River basin, Malagarasi, Luiche, Cunene, Okavango, entire Zambezi including the Kafue system, Lake Kariba, Nile, Lake Victoria basin, Webi Shebeli, Wando, Tana, Galana, Athi, Wami, Rufiji-Ruaha, Lake Rukwa, lower Sabi-Lundi, Shire below Murchison Falls, Lake Chilwa, Ruvu, Pungwe, Limpopo, Incomati and Pongola (Ref. 43912).
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 10.0, range 11 - ? cm
Max length : 50.0 cm SL hane/ej könsbestämd; (Ref. 57127); publicerad maxvikt: 1.4 kg (Ref. 43912)
Max length : 50.0 cm SL hane/ej könsbestämd; (Ref. 57127); publicerad maxvikt: 1.4 kg (Ref. 43912)
Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 1; Mjukstrålar i ryggfenan (totalt) : 5 - 6; Mjukstrålar i analfenan: 41 - 66. Diagnosis: 8-13 gill rakers (exceptionally 7-14, Ref. 43912) on lower limb of first gill arch; 41-66 branched anal-fin rays; eyes positioned laterally (Ref. 43912, 57127, 81643). In the Nile (Ref. 43912) and in West Africa adipose fin usually absent, but specimens with a rudimentary adipose fin occasionally present (Ref. 43912, 57127, 81643). In Central and East Africa populations without as well as with entirely developed adipose fin occur; in several populations both morphotypes are mixed together, the adipose fin being absent or present but sometimes varying in size from a recognizable protrusion low down the back to a fully developed adipose fin; posterior nostrils always closer to each other than are anterior ones; lower jaw reaches beyond snout but hardly remarkable in some specimens, mouth being almost isognath; inner side of pectoral spine feebly serrated; nasal barbel at least reaching to midway between eye and opercle but often reaching beyond this level; small specimens (up to about 15 cm) with typical colour pattern with dark lateral bands along sides and anal fin, this pattern gradually disappearsing in larger specimens, the body becoming in general entirely brownish, yellowish and silvery with very few traces of dark lateral bands (Ref. 43912). Eyes positioned laterally (Ref. 81643).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Reported to be a pelagic species (Ref. 34290), generally abundant in open water, in both lacustrine and fluviatile conditions, often showing shoaling habits; seems to prefer large or rather large rivers and lakes and apparently rarely penetrates small rivers or small affluents (Ref. 43912). Occur mainly on shallow waters. Migrate to the surface at night (Ref. 34291). Surface feeder; nocturnal, omnivorous, voracious and predaceous (Ref. 43912). Feeds on fish (juvenile as well as adults), insects (aquatic as well as terrestrial ones, larvae as well as adult insects), molluscs, freshwater prawns and other crustaceans, algae and bottom-living and planktonic organisms; vegetable material and eggs were also reported from stomach contents (Ref. 43912). Primarily piscivorous at 13-34 cm TL (Ref. 34291, 43912). Rarely grow to lengths greater than 30 cm SL (Ref. 34290). Maximum total length recorded 60.5 cm (Ref. 43912), 52331). Maximum lifetime observed almost 10 years (Ref. 43912). Spawn throughout the year peaking once (Ref. 34291). Migrate into rivers in fairly compact schools during the rainy season to spawn in floodwater pools (Ref. 34291). Reproduction occurs at high water after the floods (Ref. 43912). Oviparous, eggs are unguarded (Ref. 205). Flesh edible and of good flavour; possible aquaculture species (Ref. 43912).
Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Distinct pairing (Ref. 205).
Huvudreferens
Ladda upp dina referenser | referenser | Koordinator | Medarbetare
De Vos, L., 2003. Schilbeidae. p. 97-116 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57127)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Least Concern (LC) ; Date assessed: 28 October 2019
CITES
Not Evaluated
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: kommersiell; Vattenbruk: experimentell
FAO - Publication: search | FishSource |
Ytterligare information
Populationsdynamik
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Tillväxtparametrar
Max. åldrar / storlekar
Längd-vikt rel.
Längd-längd rel.
Längd-frekvenser
Massakonvertering
Rekrytering
Abundans
Livscykel
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Reproduktion
Könsmognad
Mognad/Gills rel.
Fekunditet
Lek
Lekande aggregat
Ägg
Utveckling av ägg
Larver
Larvdynamik
Anatomi
Gälyta
Hjärna
Otolit
Gälyta
Hjärna
Otolit
Fysiologi
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Kroppssammansättning
Näringsämnen
Syreförbrukning
Typ av simning
Simhastighet
Visuella pigment
Ljud från fisk
Sjukdomar & Parasiter
Toxicitet (LC50)
Genetik
Genom
Genetik
Heterozygositet
Ärftlighet
Genetisk mångfald
Genom
Genetik
Heterozygositet
Ärftlighet
Genetisk mångfald
Människorelaterad
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Vattenbrukssystem
Vattenbruksprofiler
Avelslinjer
Ciguatera-fall
Frimärken, mynt, diverse.
Verktyg
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Internet-källor
AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | Offentliga akvarier | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoobank | Zoologiskt register
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804): PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00509 - 0.00857), b=3.08 (3.01 - 3.15), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trofisk nivå (Ref. 69278): 3.6 ±0.60 se; based on food items.
Resiliens (Ref. 120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (tmax=5, probably greater; K=0.1-0.3; Fec = 18,000).
Näringsämnen (Ref. 124155): Calcium = 109 [51, 259] mg/100g; Iron = 1.97 [0.87, 3.77] mg/100g; Protein = 17.2 [15.3, 19.0] %; Omega3 = 0.546 [0.197, 1.527] g/100g; Selenium = 68.2 [27.0, 172.9] μg/100g; VitaminA = 43 [15, 128] μg/100g; Zinc = 1.37 [0.90, 2.07] mg/100g (wet weight);