Classificatie / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Kryptolebiatinae
Etymology: gracilis: The specific name gracilis (tenuous, small) is in reference to the small size of this psecies, the largest recorded specimen reaching about half the length of its congeners..
More on author: Costa.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water benthopelagisch. Tropical
South America: Mato Grosso River drainage, Saquarema Lagoon basin in southeastern Brazil.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 2.8 cm SL mannelijk / geslacht onbekend; (Ref. 72398)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 7 - 9; Anale zachte stralen: 12 - 13; Wervels: 31. Anal fin with 11-13 rays; scales on the longitudinal series 29-30; caudal fin acuminate in males; mandibular neuromasts 4 +2; jaw length 19.5-23.5% of HL; dorsal portion of pectoral-fin base with dark grey spot; flank dark brown with horizontal rows of greenish blue spots on anterior portion and metallic blue bars on posterior portion in males, dark brown stripe on isthmus in males, dark brown and white alternating short bars on basal portion of anal fin in males and horizontal rows of pale golden to pale blue spots on flank in females (Ref. 72398).
Found in creeks and swamps in open vegetation areas, in shallow water (about 5-10 cm deep), both in clear and tea colored water (Ref. 72398). Feeds mainly on ostracods and terrestrial arthropods, but also takes copepods and decapods (Ref. 72398).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
Costa, W.J.E.M., 2007. Kryptolebias gracilis n. sp. (Teleostei: Cyprinodontiformes: Rivulidae): a new killifish from the Saquarema Lagoon basin, southeastern Brazil. aqua, Int. J. Ichthyol. 13(1):7-12. (Ref. 72398)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
