Classification / Names
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Synbranchiformes (Spiny eels) >
Mastacembelidae (Spiny eels)
Etymology: Mastacembelus: Greek, mastax, -agos = bite + Greek, emballo = to throw oneself (Ref. 45335); apectoralis: The species name, apectoralis, an adjective, alludes to the absence of pectoral fins, and is formed from the Latin 'a', meaning without, and 'pectoralis', a Latinized version of pectoral (Ref. 86808).
Environment: milieu / climate zone / rango de profundidad / distribution range
Ecología
; agua dulce bentopelágico; rango de profundidad 3 - 7 m (Ref. 86808). Tropical
Africa: Lake Tanganyika in Zambia (Ref. 86808).
Tamaño / Peso / Age
Madurez: Lm ? range ? - ? cm
Max length : 16.3 cm SL macho / no sexado; (Ref. 86808)
Short description
Claves de identificación | Morfología | Morfometría
Espinas dorsales (total) : 32 - 34; Radios blandos dorsales (total) : 58 - 69; Espinas anales: 3; Radios blandos anales: 66 - 67; Vértebra: 77 - 80. Diagnosis: Mastacembelus apectoralis differs from all other mastacembelid species by the absence of pectoral fins (Ref. 86808). It is endemic to Lake Tanganyika and is placed within the Lake Tanganyika species flock; it differs from other members of this radiation by a near absence of scales, present only on the margin of the caudal peduncle and between caudal-fin rays, a very short rostral appendage and well-developed adductor mandibulae muscles forming a distinctive head shape; the lack of pigmentation distinguishes this species from all other Tanganyikan species, with the exception of M. micropectus and M. cunningtoni, although the latter species has a distinctive dark spot on the caudal and pectoral fins; both M. apectoralis and its sister species, M. micropectus, lack teeth on the palatine; Mastacembelus apectoralis has 32-34 dorsal spines, and based on this count, is distinguished from five other species in the Lake Tanganyika flock, M. platysoma, M. zebratus, M. polli, M. cunningtoni and M. moorii, which have fewer spines, 21-29; however, all other Lake Tanganyika species have overlapping spine count ranges, 24-38, at least in part with that of M. apectoralis; vertebral counts of M. apectoralis, 77-80, are in the region of those of M. micropectus and M. albomaculatus, are greater than M. zebratus, but are lower than other Tanganyikan species (Ref. 86808).
Body shape (shape guide): eel-like; Cross section: circular.
Found in a complex rocky habitat, consisting of multiple layers of rock, at a depth of 3-7 m (Ref. 86808).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Brown, K.J., R. Britz, R. Bills, L. Rüber and J.J. Day, 2011. Pectoral fin loss in the Mastacembelidae: a new species from Lake Tanganyika. J. Zool. 284(4):286-293. (Ref. 86808)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Referencia
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00269 (0.00128 - 0.00564), b=2.94 (2.76 - 3.12), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Referencia
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
Resiliencia (Referencia
120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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