Hemigrammus durbinae

Hemigrammus durbinae Ota, Lima & Pavanelli, 2015

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> Characiformes (Characins) > Acestrorhamphidae (American tetras) > Pristellinae
Etymology: Hemigrammus: Greek, hemi = half + Greek, gramma = letter, signal (Ref. 45335); durbinae: Named for Marion Durbin Ellis (née Marion Lee Durbin) (born 1887, deceased apparently in 1972), Carl Eigenmann´s student and latter a limnologist and environmental toxicologist working at the University of Missouri in Columbia, who devoted herself diligently into the most comprehensive study on Hemigrammus so far. A genitive noun.
Eponymy: Marion Lee Ellis née Durbin (1887–1972) was an American ichthyologist, entomologist, limnologist and environmental toxicologist. [...] (Ref. 128868), visit book page.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water benthopelagisch. Tropical

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South America: Amazon basin at the middle and upper portions of the rio Madeira, lower rio Purus, middle rio Solimões/Amazonas, and lower rio Tapajós in Brazil; rio Paraguai basin in Brazil and Paraguay; and from the rio Paraná basin in Paraguay.

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 2.8 cm SL mannelijk / geslacht onbekend; (Ref. 101340)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 10 - 11; Anale zachte stralen: 20 - 25; Wervels: 32 - 34. Hemigrammus durbinae can be diagnosed from most congeners, except H. marginatus, by lacking a conspicuous humeral spot and by having two dark patches of pigmentation on caudal-fin lobes. It differs from H. marginatus by having two conspicuous patches of dark pigmentation occupying most of the caudal-fin lobes, except the tips, which are hyaline (vs. relatively faint dark pigmentation along caudal-fin distal portion, tips of caudal fin dark) and by having two dark narrow stripes along anal-fin base, the first sub-parallel to anal-fin base, extending approximately along region where hypaxial musculature and the muscles of anal fin meet, and the second along anal-fin base (vs. only an inconspicuous dark stripe along anal-fin base present). Other characters useful to differentiate it from H. marginatus include the following: 5-8 pored lateral line scales (vs. 8-14); upper jaw length 32.1-41.6% in head length (vs. 42.3-46.0%); length of dorsal-fin base 9.9-13.1% of SL (vs.13.6-15.1% of SL); length of dorsal-fin length 22.7-27.1% of SL (vs. 27.6-32.6% of SL); and distance from eye to dorsal-fin origin 38.7-45.9% of SL (vs. 34.6-37.8% of SL) (Ref. 101340).
Body shape (shape guide): elongated.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Found in large floodplain lakes. Stomach contents were composed mainly of terrestrial insects (Ref. 101340).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Ota, R.P., F.C.T. Lima and C.S. Pavanelli, 2015. A new species of Hemigrammus Gill, 1858 (Characiformes: Characidae) from the centran and western Amazon and rio Paraná-Paraguai basins. Zootaxa 3948(2):218-232. (Ref. 101340)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





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Schattingen op basis van modellen

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00575 (0.00224 - 0.01478), b=3.16 (2.94 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.2   ±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.).
Kwetsbaarheid van de visserij (Ref. 59153):  Low vulnerability (10 of 100). 🛈