Actinopterygii (ray-finned fishes) > Clupeiformes
(Herrings) > Clupeidae
(Herrings, shads, sardines, menhadens) > Dorosomatinae
Etymology: Odaxothrissa: Greek, odax, = with the teeth + Greek, thrissa, -es = shad (Ref. 45335); ansorgii: Named after Dr. W.J. Ansorge, who collected the type-specimens (Ref. 54749). More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; pelagic. Tropical; 16°N - 15°S
Africa: West Africa, from Senegal to Angola (Ref. 188, 3509); including lower Senegal River (Ref. 54749, 81269), lagoons in Côte d'Ivoire (Ref. 54749, 81269), Niger Delta (Ref. 81269), Ogowe River (Ref. 81631), and rivers between Kouilou River in Congo Republic (Ref. 81631) and Cuanza River in Angola (Ref. 28136, 54749, 120641).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 13.0 cm SL male/unsexed; (Ref. 188)
soft rays: 17 - 21;
Vertebrae: 44 - 46. Diagnosis: Odaxothrissa ansorgii is characterised by the presence of prepectoral scutes, the first prepectoral scute longer and better developed than the following ones lacking ascending arms; lower jaw strongly projecting, with strong canines at symphysis; 2-4 strong backward-pointing canines on each side behind outer row of premaxillary teeth; 22-33 short lower gillrakers, less than corresponding gill filaments; anal fin with 2-3 unbranched and 14-16 branched rays; and a silver stripe along flank (Ref. 188, 81269, 81631). It resembles Odaxothrissa mento, which has 16-19 lower gillrakers, and Pellonula vorax, which lacks canines in the upper jaw and has longer gillrakers, equal to gill filaments (Ref. 188).
Found in rivers and streams (Ref. 188), also in lagoons (Ref. 2849, 81269).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 120744)
CITES (Ref. 118484)
Threat to humans
Fisheries: subsistence fisheries
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00449 - 0.01939), b=3.05 (2.88 - 3.22), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (14 of 100) .