Largemouth perch (Percichthys colhuapiensis)

Scientific name: Percichthys colhuapiensis MacDonagh, 1955

The Largemouth perch (Percichthys colhuapiensis) is a freshwater fish of the family Percichthyidae. Native range: South America, Colhue Huapi lake, Chubut, Negro, Limay and Colorado rivers, Tulumaya stream and Puente de Fierro lake in Argentina.

Biology

Anal soft rays: 8 - 11. Differs from its congeners by the mouth isognathous or prognathous (vs. hypognathous); infraorbital 2 rectangular, completely serrated ventrally (vs. irregularly shaped, smooth or partially serrated ventrally); palatine with long dentigerous process (vs. short dentigerous process); dentigerous arm of premaxilla about 2.5 times height of ascending process (vs. about 2 times or less that height); small process for insertion of ligamentum primordium on maxilla; long coronoid process, reaching posteriorly the level of the posterior border of dentary (vs. not reaching posterior border of dentary); long anguloarticular bone, with well-developed, posterodorsally directed postarticular process and mandibular sensory canal completely enclosed in bone, hyoid artery in a groove on posterior surface of dorsal hypohyal ( vs. hyoid artery piercing dorsal hypohyal); dorsal border of anterior ceratohyal only smoothly concave. Differs further by the following combination of ch

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Percichthys colhuapiensis
Family
Percichthyidae (Temperate perches)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
59.1
Environment
Freshwater; benthopelagic
Climate
Subtropical
Distribution
South America: Colhue Huapi lake, Chubut, Negro, Limay and Colorado rivers, Tulumaya stream and Puente de Fierro lake in Argentina.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Resilience
Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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