Thrattidion noctivagus  Roberts, 1972

Sanaga pygmy herring
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Thrattidion noctivagus
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Clupeiformes (Herrings) > Clupeidae (Herrings, shads, sardines, menhadens) > Dorosomatinae
Etymology: Thrattidion: Diminutive of Greek, thratta, -es = a kind of fish (Ref. 45335).   More on author: Roberts.

Environment / Climate / Range Ecology

Freshwater; pelagic.   Tropical; 6°N - 3°N

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL male/unsexed; (Ref. 188)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 14-16; Anal spines: 0; Anal soft rays: 23 - 25. Diagnosis: Thrattidion noctivagus is distinguished from its congeners by the following characters: posterior supra-maxilla absent, belly rounded; prepelvic scutes 4 to 7, with lateral arms, but without keels; pelvic scute with 2 or 3 lateral arms; postpelvic scutes keeled and with arms; lower gillrakers 10 or 11; pelvic insertion well before dorsal fin, with 7 or 8 finrays; anal fin beginning under dorsal fin base (Ref. 188, 81631). The presence of scutes distinguishes it from Congothrissa gossei and the absence of a second supra-maxilla distinguishes it from all other West or central African pellonulines (Ref. 188).

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

Africa: endemic to the Sanaga River at Edea, Cameroon (Ref. 188, 28136, 81631).

Biology     Glossary (e.g. epibenthic)

Found in rivers, collected only at dusk and dawn in swiftly flowing water of about 1m just above the hydro-electric dam at Edea, Cameroon (Ref. 188). Feeds on plankton and some terrestrial insects (Ref. 188).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Teugels, G.G., 2007. Clupeidae. p. 186-204. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 81631)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: of no interest
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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 | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00458 - 0.01993), b=3.04 (2.87 - 3.21), based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.42 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .