Actinopterygii (ray-finned fishes) > Osteoglossiformes
(Bony tongues) > Mormyridae
Etymology: Petrocephalus: Latin, petra = stone + Greek, kephale = head (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal; potamodromous (Ref. 51243). Tropical; 23°C - 26°C (Ref. 2060)
Africa: Chad, Niger, Volta, Gambia and Senegal basins, including the Nile. Also known from Côte d'Ivoire (Ref. 272).
Length at first maturity / Size / Weight / Age
Maturity: Lm 6.8  range ? - ? cm
Max length : 11.2 cm TL male/unsexed; (Ref. 57961); max. published weight: 10.00 g (Ref. 3799); max. reported age: 3 years (Ref. 2749)
Morphology | Morphometrics
soft rays: 27 - 35. body depth 2.9-3.7 x SL, anal base 3.2-4.7 x SL, caudal peduncle height 13.3-19.3 x SL. Eye diameter 2.7-4.6 x head length. Uniformly brilliant silver color, sometimes grayish or brownish.
Affinities: P. pellegrini. Generates electric organ discharge (EOD) of short duration that seems to correlate with aggregative behavior of the species (Ref. 14060; 10601). EOD temporal pattern cues have been shown to play a role in species recognition for P. bovei (Ref. 10600). A ratio measure between olfactory and visual receptor areas suggests that this species relies more on visual than olfactory information (Ref. 10839). A fractional spawner (Ref. 10605; 10606).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Builds a nest for the eggs. No guarding or tending has been observed, though.
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)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01738 (0.01265 - 0.02388), b=2.83 (2.77 - 2.89), in cm Total Length, based on LWR estimates for this species (Ref. 93245
Trophic Level (Ref. 69278
): 3.3 ±0.0 se; Based on diet studies.
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (K=0.53-1.10; tmax=2.5).
Prior r = 2.82, 2 SD range = 1.19 - 6.66, log(r) = 1.04, SD log(r) = 0.43, Based on: 1 M, 2 K, 1 tmax, records
Vulnerability (Ref. 59153
): Low vulnerability (13 of 100) .