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Osteoglossiformes (Bony tongues) >
Mormyridae (Elephantfishes)
Etymology: Petrocephalus: Latin, petra = stone + Greek, kephale = head (Ref. 45335).
Eponymy: Dr Noel Eugene Balay (1847–1902) was a French explorer and colonial administrator. [...] (Ref. 128868), visit book page.
More on author: Sauvage.
पर्यावरण: पर्यावरण / जलवायु क्षेत्र / गहराई सीमा / वितरण सीमा
पारिस्थितिकी
; स्वच्छ जल, अलवण जल ड़िमरसल. Tropical
Africa: Ogowe River in Gabon (Ref. 3203, 85311) and Congo River basin in Cameroon (Ref. 46901), Republic of Congo (Ref. 85311) and Democratic Republic of the Congo (Ref. 1879, 4910, 41580, 41590, 44985, 45434, 45441, 93897, 106245).
आकार / वज़न / आयु
परिपक्व अवधि: Lm ?  range ? - ? cm
Max length : 11.0 cm TL पुल्लिंग / अलिंग; (Ref. 42522)
Petrocephalus balayi is distinguished from all other Petrocephalus species in Central Africa by the following combination of characteristics: dorsal fin with 20-22 branched rays, anal fin with 26 or 27 branched rays, eye small (HL/ED=4,5-4,9), mouth very wide, associated with a very characteristic head shape when viewed from below, 14 teeth or more in the upper jaw, 28 teeth or more in the lower jaw (Ref. 85331). Melanin pattern consisting of the following: (1) a distinct black round mark on each side of the body below dorsal fin origin; (2) an ovoid mark on each side at the base of the caudal peduncle, not extending onto the upper and lower parts of the caudal fin; (3) a black mark, sometimes diffuse but always present, at the base of the pectoral fins (Ref. 85331).
Body shape (shape guide): fusiform / normal.
जीवन चक्र और संभोग व्यवहार
परिपक्व अवधि | पुनरुत्पत्ति | मछलीऔ का अंडे देना | अंडे | उपजाऊपन | लार्वा
Gosse, J.-P., 1984. Mormyridae. p. 63-122. 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. 3203)
आईयूसीएन रेड लिस्ट स्थिति (Ref. 130435: Version 2025-2 (Global))
मनुष्यों के लिए ख़तरा
Harmless
मानव उपयोग
साधन
विशेष रिपोर्ट
XML डाउनलोड करें
इंटरनेट स्रोत
मॉडल पर आधारित अनुमान
जातिवृति विविधता सूचकांक (संदर्भ 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01549 (0.00816 - 0.02940), b=2.95 (2.79 - 3.11), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
ट्रॉफिक स्तर (संदर्भ 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
लौटाव (संदर्भ 120179) |
ऊंचा, न्यूनतम जनसंख्या दुगनी समय अवलागत 15 महीने। (Preliminary K or Fecundity.). |
मछली पकड़ने की भेद्यता (Ref. 59153) |
Low vulnerability (11 of 100). 🛈 |