Actinopterygii (ray-finned fishes) > Clupeiformes
(Herrings) > Clupeidae
(Herrings, shads, sardines, menhadens) > Dorosomatinae
Etymology: Sierrathrissa: Latin, serra = saw + Greek, thrissa, -es = shad (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; pelagic; depth range 0 - 8 m. Tropical; 18°N - 0°N
Africa: rivers of West Africa from Senegal to Cameroon (Ref. 188), including Senegal, Gambia, Bia, Niger basin and Wouri River (Ref. 81269, 81631); and man-made lakes Lake Kainji (Ref. 188) and Lake Volta (Ref. 188, 81269). Also reported from Sanaga River in Cameroon (Ref. 51193).
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 2 - ? cm
Max length : 3.0 cm SL male/unsexed; (Ref. 188); common length : 2.3 cm SL male/unsexed; (Ref. 188)
soft rays: 17 - 20. Diagnosis: Sierrathrissa leonensis is distinguished from its congeners by the following characters: belly rounded; prepelvic scutes minute, 4-10, without arms, supporting a low membranous keel, postpelvic scutes similar, the keel more apparent; lower gillrakers 13-16; pelvic insertion well before dorsal fin, with 7 fin rays; and anal fin beginning under dorsal fin base (Ref. 188). The genus Sierrathrissa is characterised by its non-keeled pre- and postpelvic scutes, both lacking ascending arms, except for the W-shaped scute located at the pelvic-fin bases (Ref. 81269). It commonly occurs with Pellonula species, which have 8 pelvic fin rays, normal scutes and the pelvic fin insertion more or less below the dorsal fin origin (Ref. 188).
Found in rivers, but also in man-made lakes, schooling in open waters and at about 2 to 8m in Lake Kainji; rising to about 30cm from the surface at night in Lake Volta (Ref. 188). Feeds on plankton, especially cladocerans (Ref. 188).
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. 120744)
CITES (Ref. 118484)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00168 - 0.01131), b=3.10 (2.87 - 3.33), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.30 se; Based on food items.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (tm<1).
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .