Classificatie / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: nigromarginatus: From the Latin nigromarginatus (black margin), in reference to the presence of a black margin on the anal in males..
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water benthopelagisch. Tropical
South America: CorrenteRiver drainage, upper Paraná River Basin in Brazil.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 3.6 cm SL mannelijk / geslacht onbekend; (Ref. 116860); 3.1 cm SL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 10 - 11; Anale zachte stralen: 13 - 15; Wervels: 30 - 32. Melanorivulus nigromarginatus is similar to M. egens and M. linearis, and differs from all other members of the M. pictus group by having a black distal marginal stripe on the anal fin in males (vs. absence). It can be diagnosed from M. egens and M. linearis by having the following characters: melanophores strongly concentrated on the post-orbital and humeral regions, forming a stripe (vs. weakly concentrated, not forming distinct marks); red dots on the anteroventral portion of flank present (vs. absent); red bars on most portion of caudal fin present in males (vs. bars absent in M. egens and bars restricted to the dorsal portion of the caudal fin in M. linearis); and red chevron-shaped marks irregularly distributed on the flank (vs. regularly). In addition, but not diagnostic to differentiate all speci¬mens, M. nigromarginatus usually possesses 31-33 scales in the longitudinal series (vs. 29-31 in M. egens and M. linearis) (Ref. 116860).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Costa, W.J.E.M., 2018. Three new species of the killifish genus Melanorivulus from the Rio Paraná, central Brazilian Cerrado (Cyprinodontiformes: Aplocheilidae). Zoosyst. Evol. 94(1):17-27. (Ref. 116860)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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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=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
