Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Boehlkea: Because of Dr. James Böhlke (Ref. 45335).
Eponymy: James Erwin Böhlke (1930–1982) and his wife Eugenia Louisa Böhlke née Brandt (1929–2001) were both ichthyologists who worked at the Academy of Natural Sciences of Philadelphia, where he was Curator of Ichthyology (1954–1982). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecología
; agua dulce bentopelágico. Tropical
Distribución
Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri
South America: Rio Japurá drainage, rio Solimões basin in Amazonas, Brazil.
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.5 cm SL macho / no sexado; (Ref. )
Short description
Claves de identificación | Morfología | Morfometría
Radios blandos dorsales (total) : 10; Radios blandos anales: 21; Vértebra: 36 - 38. Boehlkea weitzmanican be distinguished from B. fredcochui by the following characters: complete lateral line (vs. incomplete); four rows of scales below lateral line (vs. three); a conspicuous vertically elongated humeral spot present (vs. a humeral spot absent); and 17-21 branched anal-fin rays (vs. 22-25). It can be diagnosed from B. orcesiby having 13-14 maxillary teeth (vs. 5-12), head length 27.9-29.9% (vs. 24.3-27.5% of SL), and color pattern consisting of black chromatophores in the basal half of dorsal fin, distal portion of pelvic fin, lower caudal-fin lobe and anal fin (vs. unpigmented fins) (Ref. 118101).
Occurs in small upland forest streams with 1.1-2.7 m width, 0.07-0.33 m depth, and 0.20-0.42 m/s) current velocity draining to both margins of the rio Japurá. The streams are characterized by the following: clear to yellowish; acidic (pH <6.6); cool (23.8-25.3°C); well oxygenated water (3.49-7.8 mg/l); low electrical conductivity (<33.3 μS/cm), almost completely shaded by the forest canopy; and channel substrate mainly consisted of white silica sand and pebbles, with interspersed litter banks. Occurs in the streams together with other fishes such as characids Bario steindachneri,
Bryconella pallidifrons, Hemigrammus bellottii, H. marginatus, Knodus orteguasae, Moenkhausia agnesae, Tyttocharax madeirae; lebiasinid Pyrrhulina semifasciata; heptapterid Nannoglanis fasciatus, and Myoglanis koepckei; cetopsids Denticetopsis seducta, and Helogenes marmoratus; rhamphichthyid knifefish Gymnorhamphichthys rondoni, and some cichlids Aequidens pallidus, and Bujurquina cf. robusta (Ref. 118101).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Soares, I.M., V.A. Bertaco, P.M.M. Ito and J. Zuanon, 2017. A new species of Boehlkea (Characiformes: Characidae: Stevardiinae) from the rio Japurá, Amazon basin, Brazil. Neotrop. Ichthyol. 15(3):e170026. (Ref. 118101)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00635 - 0.03140), b=2.99 (2.80 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Ref.
69278): 3.0 ±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).
