Teleostei (teleosts) >
Characiformes (Characins) >
Crenuchidae (South American darters) > Crenuchinae
Etymology: Crenuchus: Greek, krenoychos = the God of running waters.
More on author: Günther.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic; pH range: 5.5 - 6.5; dH range: ? - 5. Tropical; 24°C - 28°C (Ref. 1672)
South America: Orinoco and Amazon River basins; and coastal rivers in the Guianas.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 5.7 cm TL male/unsexed; (Ref. 37059)
Little is known of its biology in its natural environment. Unlike most Characoids, this species is typically solitary and territorial. The dimensions of the mouth confirms its predatory habits. Its food consists mainly of Ephemeroptera larvae, copepods and ostracods. In the aquarium, only the male guards the spawned eggs. About a hundred eggs are deposited on the substrate and dispersed by the male (Ref. 12225). Reproduces by laying eggs on stones or submerged leaves (Ref. 27188).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Planquette, P., P. Keith and P.-Y. Le Bail, 1996. Atlas des poissons d'eau douce de Guyane. Tome 1. Collection du Patrimoine Naturel Volume 22, MNHN, Paris & INRA, Paris. 429 p. (Ref. 12225)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00447 - 0.03086), b=3.08 (2.86 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.3 ±0.42 se; based on food items.
Resilience (Ref.
120179): Low, minimum population doubling time 4.5 - 14 years (Fec=60).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
