Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Cyprinidae
(Minnows or carps) > Gobioninae
Etymology: Pseudorasbora: Greek, pseudes = false + Rasbora, an Indian word for a fish, also used in Malay peninsula; pugnax: The specific name, pugnax, is Latin for belligerent, aggressive, pugnacious. Mature males defend their territory very aggressively during breeding season. This species is locally called ‘Kenka-Moroko’ (kenka means fighting in Japanese) (Niwa, 1967). Thus, the name alludes to the behavioral characteristics of
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Subtropical
Asia: Gifu, Aichi and Mie prefectures in Japan.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 6.0 cm SL male/unsexed; (Ref. 103407)
Morphology | Morphometrics
soft rays: 9;
Vertebrae: 33 - 34. Pseudorasbora pugnax can be diagnosed from other Japanese congeners by having a faint dark stripe on the flank which disappears in females and poorly-developed nuptial tubercles in adult males. It differs from P. parva in having longer head (27.5-31.9 % SL vs. 23.5-27.3), lateral line incomplete (vs. complete), infraorbital, supraorbital and supratemporal canals of the cephalic lateralis system incomplete (vs. complete). It can be further distinguished from P. pumila in having 33-34 vertebrae (vs. 34-35), infraorbital canal of cephalic lateralis system developed (vs. undeveloped) with a rostral branch present (vs. absent), nasal canal present (vs. absent) and mandibular canal complete (vs. incomplete) (Ref. 103407).
Occurs in deep irrigation canals and ponds (1-2 m depth) with emergent plant growth. Spawns from late March to early July and preferentially lays eggs under stones (< 200 cm3 volume) in shallow water (< 40 cm depth) (Ref. 103407).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Kawase, S. and K. Hosoya, 2015. Pseudorasbora pugnax, a new species of minnov from Japan and redescription of P. pumila (Teleostei: Cyprinidae). Ichthyol. Explor. Freshwat. 25(4):289-298. (Ref. 103407)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00365 - 0.01649), b=3.14 (2.96 - 3.32), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.2 ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low vulnerability (14 of 100) .