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Siluriformes (Catfishes) >
Amphiliidae (Loach catfishes) > Amphiliinae
Etymology: Amphilius: Greek, amphi = on both sides + Greek, leios = fat; ruziziensis: Named for the Ruzizi River drainage in eastern Rwanda and Burundi, where type specimens of this species were collected and the species is primarily distributed (Ref. 103388).
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal. Tropical
Africa: Ruzizi River drainage (Ref. 103388) and northeastern tributaries of Lake Tanganyika in Burundi (Ref. 103388).
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 12.1 cm SL mannelijk / geslacht onbekend; (Ref. 103388)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 7; Anale stekels: 0; Anale zachte stralen: 7 - 10. Diagnosis: Amphilius ruziziensis is diagnosed from A. pedunculus, A. frieli, and A. crassus by its more slender caudal peduncle, caudal peduncle depth 8.6-9.5% of standard length vs. 9.7-12.3%, and from A. jacksonii, A. pedunculus, A. crassus, and A. lujani by its narrower interorbital width, 23.4-25.1% of head length vs. 26.7-35.8% (Ref. 103388). It is further diagnosed from A. frieli, A. crassus, and A. lujani by its more slender body, body depth at anus 11.1-12.9% of standard length vs. 13.5-17.4% (Ref. 103388). Amphilius ruziziensis is further diagnosed from A. frieli by having fewer branchiostegal rays, 6-7 vs. 8-9, fewer total gill rakers on the first gill arch, 6-8, rarely 5 or 9 vs. 10-11, rarely 9 or 12, and a longer caudal peduncle, caydal peduncle length 18.7-20.3% of standard length vs. 14.4-16.4%; it is further diagnosed from A. crassus by a longer caudal peduncle, caudal peduncle length 18.7-20.3% of standard length vs. 13.3-15.5%, and shorter dorsal-fin insertion to adipose-fin insertion length, 38.2-41.5% of standard length vs. 42.2-44.6%; it is further diagnosed from A. jacksonii by its deeper caudal peduncle, caudal peduncle depth 8.6-9.5% of standard length vs. 4.8-7.9% (Ref. 103388).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Thomson, A.W., L.M. Page and S.A. Hilber, 2015. Revision of the Amphilius jacksonii complex (Siluriformes: Amphiliidae), with the descriptions of five new species. Zootaxa 3986(1):61-87. (Ref. 103388)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.0 ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
