Teleostei (teleosts) >
Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
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).
Eponymy: Dr William John Ansorge (1850–1913) was an English explorer and collector who was active in Africa in the second half of the 19th century. [...] (Ref. 128868), visit book page.
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; brackish; pelagic. Tropical; 16°N - 15°S
Africa: Western Africa, from Senegal to Angola (Ref. 188, 3509); including lower Senegal River and 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 : 15.3 cm TL male/unsexed; (Ref. 130826)
Dorsal spines (total): 0; Dorsal soft rays (total): 14 - 18; Anal spines: 0; Anal soft rays: 17 - 21; Vertebrae: 44 - 46. Diagnosis: Body moderate, often deep, its depth 25% of standard length or more; 13-17 pre-pelvic and 8-11 post-pelvic scutes, 1-2 scutes before pectoral fin origin, first pre-pectoral scute longer and more developed than following scutes without ascending arms; lower jaw strongly projecting, with strong canine teeth at symphysis; pre-maxilla with 2-4 strong backward-pointing canine teeth on each side behind outer row of pre-maxillary teeth; lower gillrakers 22-33, shorter than corresponding gill filaments; anal fin with 17-21 rays; silver stripe along flank (Ref. 188, 54749, 81269, 81631). It resembles Odaxothrissa mento, which has fewer gillrakers, 16-19 vs. 22-33; and Pellonula vorax, which lacks canine teeth in the upper jaw and has longer gillrakers, equal in length to gill filaments vs. shorter (Ref. 188, 54749).
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. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Fisheries: subsistence fisheries
Tools
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00741 (0.00459 - 0.01196), b=2.98 (2.84 - 3.12), in cm total length, based on LWR estimates for this species & (Sub)family-body (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.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
![Image of Odaxothrissa ansorgii (Ansorge\](/images/thumbnails/gif/tn_Cyans_u0.gif "Image of Odaxothrissa ansorgii (Ansorge\")
