Issue
See Géry (1972: 197-203, Figs. 30-33) for detailed description on allometry. See Planquette, Keith & Le Bail (1996) and Ouboter & Mol (1993) for detail distribution.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce benthopelagico; potamodromo (Ref. 51243). Tropical
South America: North Guiana Shield rivers.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 20.0 cm TL maschio/sesso non determinato; (Ref. 12225)
The diameter of the eyes suggests a crepuscular activity for this species. The inferior position of the mouth facilitates easy access to benthic plants like Podostemaceae and other fruits, seeds and flowers that fall into the water. The juveniles live in small creeks with sandy substrate. Between 5-10 cm, they migrate to large rivers where they form shoals along the river banks and sandy beaches of shallow waters. Thereafter, they appear to lead a more solitary existence in the central beds of rivers (Ref. 12225).
Life cycle and mating behavior
Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve
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
Strumenti
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.02291 (0.01040 - 0.05047), b=3.00 (2.82 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.1 ±0.1 se; based on size and trophs of closest relatives
Resilienza (Ref.
120179): Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
