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Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Congothrissa: Latin, conger = conger + Greek, thrissa, -es = shad (Ref. 45335).
More on author: Poll.
Environment: milieu / climate zone / depth range / distribution range
Ökologie
; süßwasser pelagisch. Tropical; 7°N - 2°S
Africa: central part of Congo River system, around Kisangani in Democratic Republic of Congo and also Ubangui River at Bangui and upstream in Central African Republic (Ref. 188, 93833).
Size / Gewicht / Alter
Maturity: Lm ? range ? - ? cm
Max length : 3.5 cm SL Männchen/unbestimmt; (Ref. 188)
Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 14 - 16; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 15 - 17. Diagnosis: Small, fairly slender fishes, depth around 22-24% of standard length; belly rounded, smooth, no trace of scutes before or behind pelvic fins; pelvic scute itself present, however, the tips of its lateral arms bifurcated; jaws about equal, with fine teeth; no second supra-maxilla; lower gillrakers 10 to 12; pelvic fin insertion just behind dorsal fin origin (Ref. 188). Scales large, 20-22 in longitudinal series (Ref. 188, 93833). Congothrissa gossei occurs with other clupeid species, but the smoothly rounded belly, absence of spiny post-pelvic scutes and lack of a second supra-maxilla makes it unmistakable (Ref. 188).
A riverine species apparently found in the main stream of the Congo River (Ref. 188). It feeds on small shrimps, mosquito larvae and chironomid larvae (Ref. 188).
Life cycle and mating behavior
Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven
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 Rote Liste Status (Ref. 130435)
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: kleinfischerei
Tools
Zusatzinformationen
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00433 - 0.01920), b=3.04 (2.87 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.3 ±0.47 se; based on food items.
Widerstandsfähigkeit (Ref.
120179): hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
