You can sponsor this page

Gymnotus obscurus  Crampton, Thorsen & Albert, 2005

Mandar um arquivo com seu (sua) Fotos e vídeos
Pictures | Imagem do Google
Image of Gymnotus obscurus
Gymnotus obscurus
No image available for this species;
drawing shows typical fish in this Family.

Classificação / Names Nomes comuns | Sinônimos | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (peixes com raios nas barbatanas) > Gymnotiformes (Knifefishes) > Gymnotidae (Naked-back knifefishes)
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335);  obscurus: Name from the Latin word 'obscurus' meaning dark, referring to its predominantly dark coloration.

Ambiente / Clima / Intervalo Ecologia

; Água doce bentopelágico.   Tropical, preferred ?

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

South America: varzea floodplain at the conflluence of the Rio Solimoes (Amazon) and the Rio Japura in Mamiraua Reserve near the Tefé, Amazonas, Brazil.

Tamanho / Peso / Idade

Maturity: Lm ?  range ? - ? cm
Max length : 21.5 cm TL macho/indeterminado; (Ref. 55508)

Descrição suscinta Morfologia | Morfometria

Espinhos dorsais (total): 0; Raios dorsais (total): 0; Raios anais : 210 - 250. Distinguished from its congeners endemic to the Amazon and Orinoco Basins and the Guyana Shield in having many pectoral-fin rays 20-22; and a color pattern of oblique and undivided thin pale bands, less than one-quarter width of dark bands, with straight high-contrast margins, which extend to the dorsal midline on the anterior half of the body, and of which many are interrupted at the ventral margin of the hypaxial muscles along the anterior two-thirds of the body. Differs further from congeners endemic to the Amazon-Orinoco basins and the Guyana Shield in having the following unique combination of characters: clear (unpigmented) patch at the caudal end of the anal-fin membrane in specimens 6.0-23.5 TL; and bands never divided to form band pairs (Ref. 55508).

Biologia     Glossário (p.ex. epibenthic)

Inhabits root mats of floating meadows in floodplains. In the whitewater floodplain, juveniles are encountered in patches of floating macrophytes along lakes margins and along the edge of canos (drainage channels from lakes to the main river channels) and paranás (channels connected at both ends to the main river channel that transport whitewater through the floodplain). Floating macrophytes form extensive floating meadows. Undertakes aerial respiration by gulping atmospheric air into the hypervascularized posterior chamber of the gas bladder. Feeds primarily on chironomid larvae, small insect nymphs and small crustaceans (Ref. 55508).

Life cycle and mating behavior Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Referência principal Upload your references | Referências | Coordenador : Campos-da-Paz, Ricardo | Colaboradores

Crampton, W.G.R., D.H. Thorsen and J.S. Albert, 2005. Three new species from a diverse, sympatric assemblage of the electric fish Gymnotus (Gymnotiformes: Gymnotidae) in the lowland Amazon basin, with notes on ecology. Copeia 2005(1):82-99. (Ref. 55508)

Status na Lista Vermelha da IUCN (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Perigo para os humanos

  Harmless




Uso pelos humanos

FAO(Publication : search) | FisheriesWiki |

Mais informação

Países
Áreas FAO
Ecossistemas
Ocorrências
Introduções
Stocks
Ecologia
Dieta
Itens alimentares
Consumo alimentar
Ração
Nomes comuns
Sinônimos
Metabolismo
Predadores
Ecotoxicologia
Reprodução
Maturidade
Desova
Fecundidade
Ovos
Desenvolvimento dos ovos
Idade/Tamanho
Crescimento
Comprimento-peso
Comprimento-comprimento
Frequências de comprimento
Morfometria
Morfologia
Larvas
Dinâmica larval
Recrutamento
Abundância
Referências
Aquacultura
Perfil para aquacultura
Estirpes
Genética
Frequência alélica
Hereditariedade
Doenças
Processamento
Mass conversion
Colaboradores
Fotos
Stamps, Coins
Sons
Ciguatera
Velocidade
Tipo de natação
Área branquial
Otólitos
Cérebros
Visão

Ferramentas

Relatórios especiais

Baixar XML

Fontes da internet