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Astyanax jacobinae Zanata & Camelier, 2008

Piaba
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Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Characidae (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335);  jacobinae: The name jacobinae refers to the type locality, município de Jacobina, BA, Brazil..

Environment: milieu / climate zone / depth range / distribution range Ecología

; agua dulce pelágico. Tropical; 11°S - 12°S, 41°W - 42°W

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Astyanax jacobinae was collected only in rio da Jaqueira, below Cachoeira Araponga, a tributary of rio Itapicuru-mirim, rio Itapicuru basin.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 5.1 cm SL macho / no sexado; (Ref. 79518)

Short description Claves de identificación | Morfología | Morfometría

Espinas dorsales (total) : 2; Radios blandos dorsales (total) : 9; Espinas anales: 4; Radios blandos anales: 19 - 22. Body compressed, moderately elongate. Mouth terminal. Overall coloration silvery-tan, with silvery highlights on scales, major portion of iris, infraorbitals, preopercle, and opercle. Dorsal portion of iris, together with lateroventral half of head, with the exception of third infraorbital, and ventral portion of preopercle and opercle tinged with yellow. Scales around humeral spot and on lateroventral region of body anterior to anal fin origin also yellowish. Humeral spot visible, although not so conspicuous as in preserved specimens. Concentration of dark chromatophores visible over caudal peduncle, although not forming conspicuous blotch. Dorsal, anal, caudal, and adipose fins reddish-orange. Pectorals yellowish and pelvic fins hyaline. Astyanax jacobinae can be distinguished from most of its congeners and from all other Astyanax species known from northeastern Brazilian drainages (A. brevirhinus, A. fasciatus, A. intermedius, A. lacustris, A. pelecus, A. rivularis, A. taeniatus) by the presence of a vertically elongated humeral blotch (vs. distinctly horizontally elongated humeral blotch in A. lacustris and A. pelecus), absence of a conspicuous dark stripe from humeral region to caudal peduncle (vs. well defined dark midlateral stripe along most of body length in A. intermedius, A. pelecus, A rivularis, A. taeniatus), three or four outer premaxillary teeth, three maxillary teeth, and 21–26 anal fin rays (vs. five outer premaxillary teeth, one or two maxillary teeth, and 28 anal-fin rays in A. brevirhinus). The new species differs from the majority of Astyanax species by its larger eye diameter (36.8–40.3% vs. 24.7–35.4%, with the exception of A. intermedius among northeastern species that approaches the eye diameter of A. jacobinae with 29.0–36.4%). It can be distinguished from A. turmalinensis by its higher number of maxillary teeth and by the presence of only one humeral blotch (3 or 4 teeth vs. 1 or 2 and presence of two humeral blotches). It can be also distinguished from A. epiagos by having higher number of branched anal-fin rays (19–22 vs. 13–17), three maxillary teeth (vs. 0–2), longer anal-fin base length (27.6–30.7% vs. 18.1–23.2%), shorter distance from eye to dorsal-fin origin (36.0–39.2% vs. 39.5–43.2%), and also by the absence of broad space between infraorbitals and preopercle.

Biología     Glosario (por ej. epibenthic)

Life cycle and mating behavior Maturities | Reproducción | Spawnings | Egg(s) | Fecundities | Larva

Main reference Upload your references | Referencias | Coordinador | Colaboradores

Zanata, A.M. and P. Camelier, 2008. Two new species of Astyanax (Characiformes: Characidae) from upper rio Paraguaçu and rio Itapicuru basins, Chapada Diamantina, Bahia, Brazil. Zootaxa 1908:28-40. (Ref. 79518)

IUCN Red List Status (Ref. 130435)

  Data deficient (DD) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

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Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Zoobank | Expediente Zoológico

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00526 - 0.02507), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  2.9   ±0.4 se; based on size and trophs of closest relatives
Resiliencia (Ref. 120179):  Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).