Kneria rukwaensis

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Kneria rukwaensis Seegers, 1995

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Kneria rukwaensis
Male picture by Seegers, L.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Actinopteri > Gonorynchiformes (Milkfishes) 鼠□目 (Milkfishes) > Kneriidae (Shellears) 克奈魚科 (Shellears) > Kneriinae
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 生態學

; 淡水 居於水底的. 熱帶; ? - 20°C (Ref. 27292)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

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).
非洲: 侷限於魯誇湖系統的西方流域與 Kalambo 流域,坦噶尼喀流域上游了。

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 6.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 26644)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 0; 背的軟條 (總數): 8-11; 臀棘 0; 臀鰭軟條: 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).

生物學特性     字彙 (例如 epibenthic)

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).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

非洲: 侷限於魯誇湖系統的西方流域與 Kalambo 流域,坦噶尼喀流域上游了。

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

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)

IUCN 瀕危狀態 (Ref. 125652)

  無危 (LC) ; Date assessed: 31 January 2006

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





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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).