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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: crixas: Named for its type locality, the Crixas River basin, which is an allusion to the indigenous tribe of people Crixas, formerly inhabiting this region.
More on author: Costa.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique; profondeur 0 - 1 m (Ref. 59346). Tropical
South America: Crixás Açu River drainage of the Araguaia River basin in Brazil.
Taille / Poids / Âge
Maturité: Lm ?  range ? - ? cm
Max length : 2.7 cm SL mâle / non sexé; (Ref. 59346); 2.6 cm SL (female)
Collected from the shallowest parts of a small stream, about 10-20 cm deep, where the larger specimens are found in places with more dense aquatic vegetation and juveniles in places more exposed to sunlight. It is a typical stream of central Brazil, locally known as Vereda or Buritizal (i.e. streams dominated by the buriti-palm Mauritia flexuosa L.), with orange clay bottom, in open vegetation of the Brazilian Cerrado and water was clear, with pH 5.3 (Ref. 59346).
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Allen, G. and S. Bailey, 2011. Phoenix Islands: Reef fishes of the Phoenix Islands, Central Pacific Ocean. Atoll Res. Bull (589):83-118. (Ref. 59346)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf. 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=0.00661 (0.00312 - 0.01398), b=3.10 (2.92 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Niveau trophique (Réf. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Résilience (Réf. 120179) |
Haut, temps minimum de doublement de population inférieur à 15 mois (Preliminary K or Fecundity.). |
Vulnérabilité de la pêche (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |