Common names:
[No common name]
Occurrence:
native
Salinity:
freshwater
Abundance:
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Importance:
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Aquaculture:
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Regulations:
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Uses:
live export: yes;
Comments:
Known from various rivers of the western Lake Rukwa drainage (Chiwanda/Chwanda, Luiche and Mfwizi) and from the Kalambo drainage (Sau, Pala and Kanyele; Lake Tanganyika basin) (Ref. 26644). Type locality: Western Lake Rukwa drainage, Mbeya region, Chiwanda/Chwanda River at Chiwanda, affluent of Momba R., 32km NW of Tunduma on road to Sumbawanga, 9°10'S, 32°34'E (Ref. 26644).
National Checklist:
Country Information:
https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tz.html
National Fisheries Authority:
http://www.isp.msu.edu/AFRICANSTUDIES/PLEA/TAFIRI.HTM
Occurrences:
OccurrencesPoint map
Main Ref:
Seegers, L., 1995
National Database:
> Gonorynchiformes (Milkfishes) > Kneriidae (Shellears)
Etymology: Kneria:From Kner, that studied fishes in the Imperial Museum of Vienna, with Jean Natterer (1817) (Ref. 45335); rukwaensis:Refers to the Lake Rukwa basin, Tanzania and Zambia, where the center of distribution of the species is situated; an adjective (Ref. 26644).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce demersal. Tropical; ? - 20°C (Ref. 27292)
Africa: restricted to the western drainage of the Lake Rukwa system and to the upper Kalambo drainage (Tanganyika basin) in Tanzania and Zambia (Ref. 26644).
Tamanho / Peso / Idade
Maturity: Lm ?  range ? - ? cm Max length : 6.2 cm SL macho/indeterminado; (Ref. 26644)
Espinhos dorsais (total) : 0; Raios dorsais (total) : 8 - 11; Espinhos anais: 0; Raios anais : 9 - 11. Diagnosis: dorsal fin origin behind pelvic fin origin; 96-104 lateral line scales; preanal length 70.7-76.2% SL; prepelvic length 46.7-52.6% SL; 9-11 anal fin rays (Ref. 26644). Lower lobe of caudal fin longer and narrower than upper lobe in fully adult males (Ref. 26644, 27292), the upper lobe as long as the proximal part of the caudal fin (Ref. 27292). Opercular disc of males characteristic, its posterior margin broad, and postopercular apparatus well developed and pillow-like (Ref. 26644).
Maximum total length recorded is 7.44cm TL (Ref. 26644). Mostly found in stagnant pools and moderately flowing streams, only rarely in fast flowing currents; omnivorous; a female of 6.55cm TL releases about 400-500 ripe eggs of a diameter of 1.2mm (Ref. 27292). Apparently no marked spawning period (Ref. 44637). Male reported to change its coloration at night, being very pale with dark spots along the midline of the body (Ref. 27292).
Ciclo de vida ou comportamento de acasalamento Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas
Seegers, L., 1995. Revision of the Kneriidae of Tanzania with description of three new Kneria species (Teleostei: Gonorhynchifromes). Ichthyol. Explor. Freshwat. 6(2):97-128. (Ref. 26644)
Physiology Body compositions Nutrients Oxygen consumptions Tipo de natação Swimming speeds Visual pigment(s) Sons de peixes Diseases / Parasites Toxicities (LC50s)
Genetics Genética Electrophoreses Heritabilities
Human related Aquaculture systems Perfis para aquacultura Estirpes Ciguatera cases Stamps, coins, misc.
Índice de diversidade filogenética (Ref. 82804): PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).