Classification / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: Rivulus: Latin, rivus = stream (Ref. 45335); azurescens: The specific name alludes to the iridescent reflecting 'azure blue' color on the sides in males and in a lesser degree also in females.
Environment: milieu / climate zone / depth range / distribution range
Écologie
; eau douce benthopélagique; pH range: 5.8 - ?. Tropical; 20°C - ? (Ref. 95022)
South America: Colombia.
Taille / Poids / Âge
Maturity: Lm ?  range ? - ? cm
Max length : 5.7 cm SL mâle / non sexé; (Ref. 95022)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Rayons mous dorsaux (Total) : 10; Rayons mous anaux: 16; Vertèbres: 33.
Inhabits a steep mountain creek under primary forest canopy with clear swift running water,
stony cascading profile, no aquatic vegetation, temperature 20 °C at 19.45 hours and pH 5.8 (Ref. 95022).
Life cycle and mating behavior
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Vermeulen, F.B.M., 2013. Four new species of Rivulus Poey, 1860, subgenus Cynodonichthys Meek, 1904 (Teleostei: Cyprinidontiformes: Rivulidae) from the Magdalena River Basin, Central Colombia, including notes on Rivulus (Cynodonichthys) elegans Steindachner, 1880. pp. 42-63. In J.H. Huber. Killi-data series. 2013 Edition. France: Paris, 64 p. (Ref. 95022)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2024-1)
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00305 - 0.01429), b=3.10 (2.91 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Résilience (Ref.
120179): Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).