Priocharax britzi Mattox, Souza, Toledo-Piza & Oliveira, 2021
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> Characiformes (Characins) > Acestrorhamphidae (American tetras) > Tyttobryconinae
Etymology: Priocharax: Greek, prio = to saw + Greek, charax, -akos = a fish without identification (Ref. 45335); britzi: Named after Dr. Ralf Britz, noteworthy ichthyologist, he mastered the world of small fishes and has described more than 20 miniature species, including two species of Priocharax; noun in the genitive case.
Eponymy: Dr Ralf Britz is a German zoologist and ichthyologist whose research foci are the anatomy, ontogeny and systematics of fish. [...] (Ref. 128868), visit book page.
Etymology: Priocharax: Greek, prio = to saw + Greek, charax, -akos = a fish without identification (Ref. 45335); britzi: Named after Dr. Ralf Britz, noteworthy ichthyologist, he mastered the world of small fishes and has described more than 20 miniature species, including two species of Priocharax; noun in the genitive case.
Eponymy: Dr Ralf Britz is a German zoologist and ichthyologist whose research foci are the anatomy, ontogeny and systematics of fish. [...] (Ref. 128868), visit book page.
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie
; zoet water benthopelagisch; diepte 0 - 1 m (Ref. 124594). Tropical
Verspreiding Gebieden | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri
South America: Brazil.
Grootte / Gewicht / Leeftijd
Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie
Dorsale zachte stralen (totaal) : 9; Anale zachte stralen: 22 - 27; Wervels: 32 - 33. This species is distinguished from all its congeners except P. pygmaeus by having lower number of teeth in the maxilla 21-30 (vs 32-58) and dentary 26-29 (vs 33-55); differs from P. pygmaeus by the presence of two postcleithra (vs. absence and branched anal-fin rays 22-27 modes 25 and 26 (vs. 19-22, mode 19); differs fom P. nanus and P. varii by having pelvic-fin rays i,5 (vs.i,6) and postcleithrum 3, slender and sinuous (vs. relatively thick and straight); differs from P. ariel by the branched anal-fin rays 22-27 (vs. 16-22) and with two postcleithra (vs. absent); further differs from P. varii by the absence of the adipose fin (vs. presence) and from P. nanus by the absence of the claustrum (vs. presence); with a shorter snout relative to the orbital diameter when compared to all congeners except P. nanus [range of the proportion of snout length in relation to orbital diameter and its mean is 45-59 (mean = 53.6; SD = 3.8) in P. britzi vs. 60-76 (mean = 65.5; SD = 4.9) in P. pygmaeus, 54-81 (mean = 67.0; SD = 5.1) in P. varii and 54-84 (mean = 68.4; SD = 6.3) in P. ariel]. Molecular analyses further support the recognition of the new species (Ref. 124594).
Cross section: compressed.
Cross section: compressed.
Specimens were collected from a small lake approximately 15 m wide and 35 m long, apparently isolated from the main channel of the rio Ipixuna and where the water level was low as sampling occurred during the dry season (September). It is possible that this lake connects to the main channel in the wet season. Collection was done near the shore at depths varying from 0.5–1.0 m, when the bottom was muddy with patches of leaf litter. Vegetation around the lake was composed mainly of dead logs and branches. Collected with the characiforms Carnegiella marthae, Hemigrammus sp., Hyphessobrycon rosaceus. Iguanodectes spilurus, Microcharacidium sp., Nannostomus digrammus, Nannostomus eques; the catfish Amblydoras affinis; the knifefishes Brachyhypopomus beebei, Microsternarchus bilineatus; the cichlids Apistogramma cf. pulchra, Biotoecus opercularis and Crenicichla cyanotus (Ref. 124594).
Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Hoofdreferentie
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Mattox, G.M.T., C.d.S. de Souza, M. Toledo-Piza and C. Oliveira, 2021. A new miniature species of Priocharax (Characiformes: Characidae) from the upper rio Ipixuna, Purus drainage, Brazil. Neotrop. Ichthyol. 19(2). (Ref. 124594)
CITES
Not Evaluated
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
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Trofische ecologie
Voedsel (prooien)
Dieetsamenstelling
Voedselconsumptie
Voedselrantsoenen
Predatoren
Voedsel (prooien)
Dieetsamenstelling
Voedselconsumptie
Voedselrantsoenen
Predatoren
Populatiedynamica
Groeiparameters
Max. leeftijden / maten
Lengte-gewicht rel.
Lengte-lengte rel.
Lengtefrequenties
Massaconversie
Rekrutering
Abundantie
Groeiparameters
Max. leeftijden / maten
Lengte-gewicht rel.
Lengte-lengte rel.
Lengtefrequenties
Massaconversie
Rekrutering
Abundantie
Levenscyclus
Voortplanting
Maturiteit
Rijpheid/kieuwen rel.
Fecunditeit
Paaien
Paaibestanden
Eieren
Ontwikkeling van de eieren
Larven
Larvale populatiedynamiek
Voortplanting
Maturiteit
Rijpheid/kieuwen rel.
Fecunditeit
Paaien
Paaibestanden
Eieren
Ontwikkeling van de eieren
Larven
Larvale populatiedynamiek
Anatomie
Kieuwoppervlak
Hersenen
Otoliet
Kieuwoppervlak
Hersenen
Otoliet
Fysiologie
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Voedingsstoffen
Zuurstofverbruik
Type zwemmen
Zwemsnelheid
Visuele pigmenten
Vis geluid
Ziekten en parasieten
Toxiciteit (LC50)
Lichaamssamenstelling
Voedingsstoffen
Zuurstofverbruik
Type zwemmen
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Ziekten en parasieten
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genoom
Genetica
Heterozygositeit
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genoom
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Menselijk gerelateerd
Aquacultuursystemen
Aquacultuurprofielen
Kweeklijnen
Ciguatera gevallen
Postzegels, munten, diversen.
Aquacultuursystemen
Aquacultuurprofielen
Kweeklijnen
Ciguatera gevallen
Postzegels, munten, diversen.
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Schattingen op basis van modellen
|
Fylogenetische diversiteitsindex (Ref. 82804) |
PD50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
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Trofisch niveau (Ref. 69278) |
3.0 ±0.4 se; based on size and trophs of closest relatives |
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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). 🛈 |