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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: gaucheri: Named for Philippe Gaucher, who found the first specimens, for its fascinating work on Amazonian fauna.
Eponymy: Philippe Gaucher became (2007) Scientific Director of the Centre National de la Recherche Scientifique and Mission Parc de la Guyane, Cayenne, French Guiana. He co-wrote: The Tailless Amphibians of French Guiana (2000). He found the first specimens. (Ref. 128868), visit book page.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk; djupintervall 0 - ? m (Ref. 78216). Tropical
South America: Maroni basin in French Guiana.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 5.7 cm SL hane/ej könsbestämd; (Ref. 78216)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 8 - 9; Mjukstrålar i analfenan: 13 - 15; Ryggkotor: 31 - 35. Differs from other species of the genus by a combination of characters including dorsal and anal fin ray counts, number of scales in lateral and transverse series, by the lack of the supracaudal spot at all ages in both sexes, a short base dorsal fin, a yellow color background on body, a red colored sub-distal area on anal fin in male, with a yellow one in female, and a dark margin on caudal fin (Ref. 78216).
Body shape (shape guide): elongated.
Occurs in small groups in small mountainous rivers and marshes (Ref. 78216).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Keith, P., L. Nandrin and P.-Y. Le Bail, 2006. Rivulus gaucheri, a new species of rivuline (Cyprinodontiformes: Rivulidae) from French Guiana. Cybium 30(2):133-137. (Ref. 78216)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (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=0.00891 (0.00366 - 0.02168), b=3.11 (2.92 - 3.30), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.3 ±0.4 se; based on size and trophs of closest relatives |
Resiliens (Ref. 120179) |
Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |