Kneria wittei : fisheries

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Kneria wittei Poll, 1944

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Kneria wittei
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> Gonorynchiformes (Milkfishes) > Kneriidae (Shellears)
Etymology: Kneria: From Kner, that studied fishes in the Imperial Museum of Vienna, with Jean Natterer (1817) (Ref. 45335);  wittei: Dedicated to M.G.F. De Witte, whose Kneriidae specimens, collected in Katanga, have allowed to resolve the generic status of Kneria and Xenopomatichthys (Ref. 89080).
More on author: Poll.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 新鮮な水 底生の漂泳性. Tropical

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Africa: Lake Tanganyika basin and upper Congo River basin in Democratic Republic of the Congo (Ref. 2970). Also reported from the Lake Tanganyika basin in Tanzania (Ref. 4967), but presence in Tanzania unconfirmed in Ref. 26644.

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 8.6 cm SL オス/雌雄の選別がない; (Ref. 2970)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 0; 背鰭 (合計): 10-12; 肛門の骨 0; 臀鰭: 9 - 10; 脊つい: 41 - 44. Diagnosis: body depth 4.6-7 times in SL; head length 4.3-6 times in SL (Ref. 2970, 36901, 45485, 89080). Head 1.5-2 times longer than head depth (Ref. 2970). Snout length 2.5-3.8 times in HL, 1.1-1.7 times in postorbital length; eye lateral, its diameter 3.4-5.2 times in HL; interorbital distance 2.3-3.6 times in HL (Ref. 2970, 36901, 45485, 89080). Dorsal fin origin 0.8-1.1 times closer to tip of snout than to caudal fin (Ref. 2970), above anterior pelvic fin rays (Ref. 2970, 36901, 45485, 89080) or slightly more posterior (Ref. 2970). Anal fin 0.9-1.7 times further from pelvics than from caudal fin; pectoral fin length 0.8-1.3 times in HL; pelvic fin length 0.9-1.4 times in HL; caudal peduncle 1.4-2.2 times longer than deep (Ref. 2970). Mature males with opercular and postopercular organ (Ref. 2970, 36901). Mouth inferior, straight, its maximum width (including lips) 2.8-4 times in HL (Ref. 2970). Body brownish dorsally, yellowish ventrally (Ref. 2970, 36901, 45485, 89080). A pronounced brownish lateral band on flanks, either continuous (Ref. 2970, 36901, 45485, 89080) or made up of 8-10 sometimes very contrasting spots (Ref. 2970). Pale zone just above lateral band; medio-dorsal line often with small dotts (Ref. 2970). Dorsal fin sometimes with slightly darker, transversal band and dark spot at origin; caudal fin base darker, its rays slightly greyish (Ref. 36901, 45485, 89080). Pelvic fins with black spot at their base (Ref. 2970, 36901, 45485, 89080). Pectoral, pelvic and anal fins pale (Ref. 45485, 89080).

生物学     用語集 (例 epibenthic)

Inhabits upland streams and pools; hardy and can survive some time out of water (Ref. 4967). Rare, but abundant in its habitats (Ref. 36901).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Poll, M., 1984. Kneriidae. p. 129-133. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3565)

IUCNのレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 16 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 食糧水産
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Estimates based on models

Phylogenetic diversity index (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).
価格帯 (Ref. 80766):   Unknown.