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Brycinus nurse (Rüppell, 1832)

Nurse tetra
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Brycinus nurse
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Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Characiformes (Characins) > Alestidae (African tetras)
Etymology: Brycinus: Greek, ebrykon, brykomai = to bite, to gnaw (Ref. 45335);  nurse: rüppellii.  More on author: Rüppell.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoetwater pelagisch; pH range: 6.0 - 7.8; dH range: ? - 30; potamodroom (Ref. 51243).   Tropical; 23°C - 27°C (Ref. 2060)

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Africa: widely distributed in West Africa (Ref. 2880, 81279). In Lower Guinea present in Cross and Mémé rivers (Ref. 80279). Also in Chad basin (Ref. 367, 81279) and Nile River (Ref. 28714, 31439, 58460) up to Lake Albert (Ref. 4903, 42019).

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm 8.9, range 22 - ? cm
Max length : 25.0 cm TL mannelijk/geslacht niet bekend; (Ref. 3799); Maximaal gepubliceerd gewicht: 200.00 g (Ref. 3799)

Korte beschrijving Morfologie | Morfometrie

Anale stekels 0; Anale zachte stralen: 13 - 18. Diagnosis: fronto-parietal fontanel absent in adults, sometimes pore-like in juveniles, disappearing with growth; dorsal fin origin at about same level as pelvic fin insertion; sexual dimorphism affecting anal fin shape; 24-34 lateral line scales; 5.5 scales between lateral line and dorsal fin; 10-15 anal fin branched rays; 14-20 gill rakers on lower limb of first gill arch; 8 teeth in outer premaxillary row (Ref. 2880, 80290, 81279). Snout short, more than 3x head length; head length/snout length 3.6-4.3; 10-11.5 predorsal scales; flanks without lateral band; adults medium-sized (Ref. 80290).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Inhabits rivers, lakes, irrigation canals and fringing vegetation; feeds on zooplankton, Caridina, insects, snails and vegetation (Ref. 28714). Dwarf populations are described in lake basins: Lake Turkana, B. n. nana Pellegrin, 1935 and Lake Chad, B. n. dageti Blache and Miton, 1960 (see Ref. 2880).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

Paugy, D. and S.A. Schaefer, 2007. Alestidae. p. 347-411. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) Poissons d'eaux douces et saumâtres de basse Guinée, ouest de l'Afrique centrale/The fresh and brackish water fishes of Lower Guinea, west-central Africa. Vol. 1. Coll. Faune et Flore tropicales 42. Istitut de recherche pour le développement, Paris, France, Muséum nationale d'histoire naturelle, Paris, France and Musée royale de l'Afrique centrale, Tervuren, Belgique. 800 p. (Ref. 80290)

Status op de Rode Lijst van het IUCN (Ref. 120744)

  Bedreigd (EN) (B1ab(ii,iii)+2ab(ii,iii)); Date assessed: 15 October 2006

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





Gebruik door de mens

Visserij: van minder commercieel belang; Aquarium: Commercieel
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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.00851 - 0.02041), b=2.96 (2.84 - 3.08), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.5   ±0.2 se; Based on diet studies.
Weerstandsvermogen (Ref. 120179):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (K=0.41-0.92; tm=1; Fec < 1,000).
Kwetsbaarheid (Ref. 59153):  Low to moderate vulnerability (29 of 100) .
Prijsklasse (Ref. 80766):   Unknown.