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> Clupeiformes (Herrings) > Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Nannothrissa: Latin, nannus = small + Greek, thrissa, -es = shad (Ref. 45335).
Eponymy: Dr Donald James Stewart (d: 1946) is Professor of Environment & Forest Biology at the College of Environmental Science and Forestry, State University of New York, Syracuse, where he presently teaches Ichthyology & Tropical Ecology. [...] (Ref. 128868), visit book page.
More on authors: Poll & Roberts.

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

; agua dulce pelágico. Tropical; 0°S - 3°S

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Africa: Lake Mai-Ndombe in the Democratic Republic of the Congo (Ref. 188, 28136, 94752).

Tamaño / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 2.3 cm SL macho / no sexado; (Ref. 188)

Short description Claves de identificación | Morfología | Morfometría

Espinas dorsales (total) : 0; Radios blandos dorsales (total) : 14 - 16; Espinas anales: 0; Radios blandos anales: 17 - 19; Vértebra: 38 - 39. Diagnosis: Body slender or moderate, depth about 25% of standard length; scutes a little behind isthmus, very strongly keeled, 9-10 pre-pelvic and 7-9 post-pelvic scutes; lower jaw very slightly projecting, toothless; no teeth on premaxillae or maxillae; posterior supra-maxilla as deep as maxilla blade and with long slender anterior shaft; lower gillrakers 20-23; pelvic fin with 1 unbranched and 6-7 branched rays, its insertion just below dorsal fin origin; anal fin rays 17-19; scales in lateral series 34-35 (Ref. 188, 94752). It differs from Nannothrissa parva in having fewer gillrakers, 20-23 vs. 24-31, fewer anal fin rays, 17-19 vs. 20-23, and fewer scales in lateral series, 34-35 vs. 35-40 (Ref. 188, 94752).

A lacustrine species in acid waters (Ref. 188).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

Main reference Upload your references | Referencias | Coordinador | Colaboradores

Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Endangered (EN) (B1ab(v)); Date assessed: 16 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Pesquerías: pesquerías de subsistencia

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00871 (0.00415 - 0.01826), b=3.06 (2.89 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Nivel trófico (Ref. 69278): 3.0 ±0.3 se; based on size and trophs of closest relatives

Resiliencia (Ref. 120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Price category (Ref. 80766): Low.

Nannothrissa stewarti Poll & Roberts, 1976