分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Petrocephalus: Latin, petra = stone + Greek, kephale = head (Ref. 45335); sauvagii: Named in honour of Dr. H.E. Sauvage (Ref. 42539).
More on author: Boulenger.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 居于水底的. 熱帶
Africa: Congo River basin and Niger Delta (Ref. 2915, 85331). Possibly present in the coastal Nigerian fringe (Ref. 2915). Reports from coastal basins of Cameroon (Ref. 51193) or the Chiloango (Ref. 88943) questionable as the species is reported to be absent from the Lower Guinea Ichthyological Province (Ref. 85331).
非洲: 剛果河流域，尼日三角州, 而且可能是出現在海岸的奈及利亞邊界.(參考文獻 2915)
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 17.5 cm TL 雄鱼/尚未辨别雌雄; (Ref. 42539)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 背的软条 (总数) : 26 - 28; 臀棘: 0; 臀鳍软条: 34 - 36. Petrocephalus sauvagii is distinguished from all other Petrocephalus species in Central Africa by the following combination of characteristics: very wide mouth (mouthwidth 2,7 to 3,7 in head length) associated with a characteristic head shape when viewed from above, anal fin with at least 32 branched rays, dorsal fin with at least 25 branched rays, mouth subterminal, ration between the head length and the mouth position as large as 7,4 (Ref. 85331). It has 17-30 teeth in upper jaw, and 29-35 teeth in lower jaw (Ref. 2915, 85331). Pigmentation pattern with two melanin markings, sometimes of weak intensity or even scarcely visible: (1) an irregularly round black mark below the anterior base (first to fourth rays) of the dorsal fin; and (2) an ovoid blackish mark, often irregularly shaped, at the base of the caudal fin, extending onto the upper and lower fleshy lobes of the fin (Ref. 85331).
体高 2.6-3.1 x SL, 尾柄高度 16.7-18 x SL, 臀鳍基底鳍 3.2-3.5 x SL。 眼直径 4.0-4.6个 x 头长。 主要地第一个银色的有背部被有显着的黑色的鳍条。 斑点不碰触背鳍基底。
Affinities: Same color as P. soudanensis, but distinguished by mouth position, number of teeth and eye size; same morphology as P. bane and P. ansorgii (Ref. 2915).
分类相关: 如 P. soudanensis 的相同颜色. 区别的特徵为嘴巴位置，牙齿数目，眼睛大小了。 如 P. 毒药 与 P. ansorgii 的相同形态学.
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
非洲: 剛果河流域，尼日三角州, 而且可能是出現在海岸的奈及利亞邊界.(參考文獻 2915)
Lévêque, C.D. Paugy and G.G. Teugels (eds.), 1990. Faune des poissons d'eaux douces et saumâtres d'Afrique de l'Ouest. Tome 1. Coll. Faune Tropicale N° 28. Musée Royal de l'Afrique Centrale, Tervuren, Belgique et O.R.S.T.O.M., Paris, France. 384 p. (Ref. 2703)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01585 (0.00697 - 0.03603), b=2.85 (2.67 - 3.03), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
营养阶层 (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
回复力 (Ref.
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
