分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Cichliformes (Cichlids, convict blennies)
鱸形目 (Cichlids, convict blennies) >
Cichlidae (Cichlids)
慈鯛科魚類 (Cichlids) > Pseudocrenilabrinae
Etymology: Rhamphochromis: Greek, rhamphos = bill, peak + Greek, chromis = a fish, perhaps a perch (Ref. 45335).
More on author: Boulenger.
Issue
Quote Turner et al. (Ref. 55949): "We consider that both R. leptosoma and R. melanotus are probably junior synonyms of R. esox. If this is accepted, R. esox can be considered the most distinctive and readily identified species of the genus."
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的; pH range: 7.4 - 8.5; dH range: 5 - 30; 深度上下限 2 - 65 m (Ref. 55949). 熱帶; 23°C - 27°C (Ref. 13614); 9°S - 15°S
Africa: Endemic to Lake Malawi.
非洲: 馬拉威湖的特有種。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 19 - ? cm
Max length : 42.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 55949)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Diagnosis: elongated and very streamlined shape; body in cross-section more rounded than congenerics; frequently exhibits a horizontal stripe (Ref. 55949).
鑑別: 瘦長的與非常流線型的形狀; 身體橫切面更圓形的超過同屬的; 時常展現一條水平的斑紋。 (參考文獻 55463)
描述: 大又相當圓筒形的種具有非常細長的身體; 下頜非常深的有平滑的表面; 齒短的﹐直的與空隙大的, 通常看不見的當嘴巴被關閉的時候.(參考文獻 55463)
體色 countershaded, 深灰色的背面通常有一個藍色的金屬彩虹色活著時; 在側面上通常有一條不明顯的深色水平的斑紋; 腹鰭與臀鰭或灰色的-白色或橘色的; 有時在臀鰭上的 2-9 橘黃色的 eggspots.(參考文獻 55463)
Inhabits the open water (Ref. 5595). Widely distributed in shelf and rocky reef zones, usually where the bottom is fairly shallow; rarely found offshore; small juveniles widely distributed in the littoral zone in swampy, sandy and rocky habitats; adults regularly encountered near sandy beaches in the shallows (Ref. 55949). Feeds on fish species like the small Utaka and the lake sardine Usipa (Engraulicypris sardella) (Ref. 5595).
棲息於開放水域。 (參考文獻 5595) 廣泛地分佈於大陸棚與岩石的礁區中, 通常底部是非常淺的地方; 很少地發現於外海了; 小的稚魚廣泛分佈於在沼澤又沙與岩石的棲息地的海濱區域。 (參考文獻 55463) 吃像小的 Utaka 與湖沙丁魚 Usipa( 沙丁鯷波魚〔Engraulicypris sardella〕 ) 的魚種。 (參考文獻 5595)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
非洲: 馬拉威湖的特有種。
Maréchal, C., 1991. Rhamphochromis. p. 422-424. In J. Daget, J.-P. Gosse, G.G. Teugels and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 4. (Ref. 5689)
人類使用
漁業: 商業性; 水族館: 商業性
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5156 [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).
營養階層 (Ref.
69278): 4.2 ±0.73 se; based on food items.
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).
