Brycinus nurse  (Rüppell, 1832)

Nurse tetra
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Alestidae (African tetras)
Etymology: Brycinus: Greek, ebrykon, brykomai = to bite, to gnaw (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; pelagic; pH range: 6.0 - 7.8; dH range: ? - 30; potamodromous (Ref. 51243).   Tropical; 23°C - 27°C (Ref. 2060)

Length at first maturity / Size / Weight / Age

Maturity: Lm 8.9, range 22 - ? cm
Max length : 25.0 cm TL male/unsexed; (Ref. 3799); max. published weight: 200.00 g (Ref. 3799)

Short description Morphology | Morphometrics

Anal spines: 0; Anal soft rays: 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).

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri

Africa: widely distributed in West Africa (Ref. 2880, 80279, 81279). In Lower Guinea present in Cross and Mémé rivers (Ref. 80279).

Biology     Glossary (e.g. 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).

Main reference Upload your references | References | Coordinator | Collaborators

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.

IUCN Red List Status (Ref. 90363)

Threat to humans

  Harmless




Human uses

Fisheries: minor commercial; aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on empirical models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01510 (0.00980 - 0.02327), b=2.97 (2.85 - 3.09), based on LWR estimates for species & Genus-BS (Ref. 93245).
Trophic Level (Ref. 69278):  2.4   ±0.3 se; Based on diet studies.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (K=0.41-0.92; tm=1; Fec < 1,000).
Vulnerability (Ref. 59153):  Low vulnerability (16 of 100) .
Price category (Ref. 80766):   Unknown.