Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Hypostomus: Greek, hypo = under + Greek, stoma = mouth (Ref. 45335); yaku: The specific name is from the Tupi Guarani language, dialect Mbyá, y means water, and raku means hot, warm, in reference to the name of the rio Quente, a warm water river. A noun in apposition.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal. Tropical; 34°C - ? (Ref. 97842)
South America: Rio Quente, rio Paranaíba drainage, in the upper rio Paraná basin in
central Brazil.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.1 cm SL male/unsexed; (Ref. 97842)
Short description
Identification keys | Morphology | Morphometrics
Anal soft rays: 5; Vertebrae: 27 - 28. Hypostomus yaku can be diagnosed from all congeners by having the five lateral series of plates with hypertrophied odontodes, not aligned in longitudinal rows, more conspicuous on flanks of caudal peduncle of the larger specimens (vs. lateral series of plates without hypertrophied odontodes or with aligned hypertrophied odontodes only along the longitudinal keels) (Ref. 97842).
Facultative air-breathing in the genus (Ref. 126274); The type locality, Rio Quente, has a width of about 3 m and depth of 1.0-1.5 m, moderate flow and bottom with sand, pebbles and rocks. Associated mainly with rocks. Seems to be restricted to warm waters. Collected together with Characidium xanthopterum, Characidium aff. zebra, Knodus moenkhausii, an undescribed species of a putatively new genus of the Characidae, and the exotic Xiphophorus helleri and Oreochromis niloticus (Ref. 97842).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Martins, F.O., F. Langeani and C.H. Zawadzki, 2014. A new spiny species of Hypostomus Lacépède (Loricariidae: Hypostominae) from thermal waters, upper rio Paraná basin, central Brazil. Neotrop. Ichthyol. (Ref. 97842)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Fisheries: of no interest
Tools
Special reports
Download XML
Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01622 (0.00733 - 0.03589), b=2.96 (2.79 - 3.13), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).