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Characidium helmeri Zanata, Sarmento-Soares & Martins-Pinheiro, 2015

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Characidium helmeri
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drawing shows typical fish in this Family.

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterígios (peces con aletas radiadas) > Characiformes (Characins) > Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335);  helmeri: Named for Dr. José Luis Helmer, who collected part of the material of the species and in recognition of his pioneer studies on the natural history of the freshwater fishes in Espírito Santo and Southern Bahia, since 1976. A genitive noun.

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

; agua dulce bentopelgico.   Tropical

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

South America: Brazil.

Tamaño / Peso / Age

Maturity: Lm ?  range ? - ? cm
Max length : 4.0 cm SL macho / no sexado; (Ref. 104900)

Short description Morfología | Morfometría

Radios blandos dorsales (total): 11-13; Radios blandos anales: 7 - 9; Vértebra: 33 - 35. Characidium helmeri is distinguished from other species of Characidium by possessing dark, vertically elongated, irregular, narrow spots or dashes, usually more evident over the midlateral stripe and/or ventral half of body, formed by high concentration of melanophores on the posterior half of scales, occurring in a somewhat curved or zigzag-shape. It also differs from congeners by having extremely reduced or complete absence of supraorbital. It further differs by having lateral line reduced (vs. complete, except in C. bahiense, C. interruptum, C. laterale, C. mirim, C. nupelia, C. rachovii, C. stigmosum and C. xavante), adipose fin absent (vs. present, except in C. mirim, C. nupelia, C. stigmosum, and C. xavante), and isthmus naked on its anteriormost portion (vs. isthmus completely covered by scales in most congeners, except in C. alipioi, C. boavistae, C. crandellii, C. declivirostre, C. fasciatum, C. gomesi, C. grajahuensis, C. japuhybense, C. lauroi, C. macrolepidotum, C. oiticicai, C. schubarti, C. timbuiense, and C. vidali). It can be diagnosed from C. bahiense, C. interruptum, C. laterale, C. mirim, C. nupelia, C. rachovii and C. xavante by having more pored lateral line scales 13-22 (vs. 5-11) and two series of dentary teeth (vs. one). It can be further separated from C. nupelia and C. xavante by the absence of a dark humeral blotch (vs. presence) smaller number of dark vertical bars on the body, 7-12 when present (vs. 12-18). It is distinct from C. vestigipinne, a species with adipose fin absent or reduced, by having two dentary rows of teeth, the outer with tricuspid teeth (vs. one row of conical teeth), 4 scales above lateral line and 4 below (vs. 5 above; and 5 or 6 below), and absence of roundish black marks on pelvic, dorsal, and anal fins (vs. presence). It further differs from C. stigmosum by having a black basicaudal dot (vs. absence), and by having pelvic, pectoral, anal, and caudal fins not dark pigmented in males (vs. pigmented) (Ref. 104900).

Biología     Glosario (por ej. epibenthic)

Occurs only in slow flowing river stretches, situated 8-91m above sea level, a few centimeters to 1.5 m deep, with transparent or dark water running in substrate composed of pebbles, gravel, or organic debris. Found syntopic with Aspidoras virgulatus Nijssen & Isbrucker, Astyanax sp., Geophagus brasiliensis (Quoy & Gaimard), Hoplerythrinus uniaeniatus (Agassiz), Hoplias malabaricus (Bloch), Mimagoniates microlepis Steindachner, M. sylvicola Menezes & Weitzman, Scleromystax prionotos (Nijssen & Isbrucker), Otothyris travassosi Britski & Schaefer, Phalloceros ocellatus Lucinda, including the endangered species Acentronichthys leptos Eigenmann & Eigenmann and Rachoviscus graciliceps Weitzman & Cruz. Food items in the stomach contents of four specimens ranging from 2.68-3.59 cm SL consisted of small aquatic insect larvae, mainly Chironomidae, nymphs, fragments of insects, vegetable debris and organic matter partially digested (Ref. 104900).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

Main reference Upload your references | Referencias | Coordinador | Colaboradores

Zanata, A.M., L.M. Sarmento-Soares and R.F. Martins-Pinheiro, 2015. A new species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from coastal rivers in the extreme south of Bahia, Brazil. Zootaxa 4040(3):371-383. (Ref. 104900)

IUCN Red List Status (Ref. 120744)


CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO(Publication : search) | FishSource |

Más información

Países
Áreas FAO
Ecosistemas
Ocurrencias, apariciones
Introducciones
Stocks
Ecología
Dieta
componentes alimenticios
consumo de alimento
Ración
Nombres comunes
Sinónimos
Metabolismo
Despredadores
Ecotoxicología
Reproducción
Madurez
Puesta
Agregación para la puesta
Fecundidad
Huevos
Egg development
Age/Size
Crecimiento
Length-weight
Length-length
Length-frequencies
Morfometría
Morfología
Larva
Dinámica larvaria
Reclutamiento
Abundancia
Referencias
Acuicultura
Perfil de acuicultura
Razas
Genética
Frecuencias de alelos
heritabilidad
Enfermedades
Procesamiento
Mass conversion
Colaboradores
Imágenes
Stamps, Coins Misc.
Sonidos
Ciguatera
Velocidad
Tipo de natación
Superficie branquial
Otolitos
Cerebros
Visión

Herramientas

Special reports

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Fuentes de Internet

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Árbol de la vida | Wikipedia(Go, búsqueda) | World Records Freshwater Fishing | Zoobank | Expediente Zoológico

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  3.3   ±0.3 se; Based on size and trophs of closest relatives
Resiliencia (Ref. 69278):  .
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .