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Siluriformes (Catfishes) >
Doradidae (Thorny catfishes) > Doradinae
Etymology: Leptodoras: Greek, leptos = thin + Greek, doras = skin (Ref. 45335); oyakawai: Named for Osvaldo Takeshi Oyakawa, for his dedicated service to the ichthyological community since 7 July 1989 as Collection Manager of the Fish Collection ('Seção de Peixes') at the Museu de Zoologia da Universidade
de São Paulo.
Eponymy: Dr Osvaldo Takeshi Oyakawa is a marine biologist and limnologist at the Museu de Zoologia da Universidade de São Paulo where his doctorate was awarded (1998). [...] (Ref. 128868), visit book page.
Ambiente: milieu / zona climática / intervalo de profundidade / gama de distribuição
Ecologia
; Água doce demersal. Tropical
South America: Rio Tapajós and rio Xingu basins in Brazil.
Tamanho / Peso / Idade
Maturidade: Lm ? range ? - ? cm
Max length : 12.4 cm SL macho/indeterminado; (Ref. 79526)
Descrição breve
Chaves de identificação | Morfologia | Morfometria
Espinhos dorsais (total) : 1; Raios dorsais moles (total) : 6; Vértebras: 38 - 40. A species belonging to the genus Leptodoras by having modified oral hood and first gill arch with enlarged accessory lamellae extending well onto medial face of gill filaments. Differs from other species of Leptodoras by having the following three unique characters: gas bladder moderately sized (not reduced) and with simple walls (diverticula absent), and paired bony capsules on anteriormost vertebrae reduced to paired cup-like laminar ossifications separated by a triangular septum (Ref. 79526).
Body shape (shape guide): elongated.
Caught at night on a large sandy shoal where the main channel of the river is wide and shallow (less than 2 m in depth) ) and with sluggish current. This species was also collected at night along a sandy beach with moderate current (Ref. 79526).
Ciclo de vida e comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas
Birindelli, J.L.O., L.M. Sousa and M.H. Sabaj Pérez, 2008. New species of thorny catfish, genus Leptodoras Boulenger (Siluriformes: Doradidae), from Tapajós and Xingu basins, Brazil. Neotrop. Ichthyol. 6(3):465-480. (Ref. 79526)
Categoria na Lista Vermelha da IUCN (Ref. 130435: Version 2025-2 (Global))
Ameaça para o homem
Harmless
Utilização humana
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimativas baseadas em modelos
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00587 - 0.02579), b=2.96 (2.78 - 3.14), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 2.8 ±0.4 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Elevada, tempo mínimo de duplicação da população menor que 15 meses (Preliminary K or Fecundity.).
Vulnerabilidade da pesca (Ref.
59153): Low vulnerability (10 of 100).
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