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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Eponymy: Karl Lung was a German aquarist who collected this species in French Guiana. We have been unable to unearth more. (Ref. 128868), visit book page.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
; zoet water; brak water benthopelagisch; pH range: 6.0 - 7.0; standvastig; diepte 20 - 80 m (Ref. 35237). Tropical; 26°C - 30°C (Ref. 35237)
South America: French Guiana (Ref. 36579) and Suriname (Ref. 59052). Status of this species is uncertain; possibly a regional form of Rivulus urophthalmus.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ?  range ? - ? cm
Max length : 7.1 cm SL mannelijk / geslacht onbekend; (Ref. 101566)
Occurs in flooded savannas and coastal swamps which are sunlit. Frequently found in shallow waters and is sympatric with other Rivulus of French Guiana except R. ocellatus (Ref. 27188). Not a seasonal killifish. Juveniles are released from eggs measuring 1.2 mm (Ref. 35237). Sexual differentiation is possible at 4 months; sexual maturity is reached at 5 months of age (Ref. 27188). Calm and passive; is easy to maintain in the aquarium (Ref. 27139).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
The eggs are of 1.2 mm diameter. Sexes can be distinguished at 4 months of age.
Costa, W.J.E.M., 2003. Rivulidae (South American Annual Fishes). p. 526-548. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36579)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang; Aquarium: Commercieel
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref. 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=0.00912 (0.00468 - 0.01779), b=3.06 (2.90 - 3.22), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Trofisch niveau (Ref. 69278) |
3.3 ±0.4 se; based on size and trophs of closest relatives |
Weerstandsvermogen (Ref. 120179) |
Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (tm=0.4). |
Kwetsbaarheid van de visserij (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |