Issue
Neotype designation of Acipenser plecostomus in Boeseman 1968 (RMNH 182400) may be invalid if the smallest specimen in NRM LP 32 is part of the type series; for more details on synonymy of Hypostomus plecostomus see Boeseman (1968:32) and Isbrücker (1980:30). Mitochondrial D-loop sequences used in a molecular phylogeny of Hypostomus and related genera by Montoya-Burgos and Weber (in press, fig. 2; EMBL/GenBank AJ318351).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce; salmastro demersale; pH range: 6.2 - 8.2; dH range: ? - 28. Tropical; 20°C - 28°C (Ref. 2060); 12°N - 25°S, 60°W - 51°W
South America: Guianas (coastal region from the Oyapock River basin to the Essequibo River basin). Identity of reported introduced species to several Asian countries for the aquarium trade need further confirmation.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 25.0 cm SL maschio/sesso non determinato; (Ref. 90186); common length : 28.0 cm TL maschio/sesso non determinato; (Ref. 12193)
This species is distinguished by the following characters: differs from species of the H. cochliodon group (H. macushi and H. taphorni in the Guianas) by having viliform teeth (vs. large spoon-shaped teeth); differs from other Guianese species of Hypostomus by having teeth bearing a short roughly rounded crown, with lateral cusp about half the length of the main cusp (vs. an elongated crown, with a small lateral cusp in coppenamensis, corantijni, crassicauda, gymnorhynchus,nematopterus, watwata), or sometimes with an enlarged lateral cusp (observed in H. gymnorhynchus from upper Maroni River Basin only, H. micromaculatus and H. paucimaculatus); differs from long-crown toothed species except H. watwata by the presence of a preanal plate (vs. absence); differs from H. watwata in having an azygous plate which is sometimes divided into two to three secondary platelets, bordering the posterior part of the supraoccipital and directly contacting the pterotic-supracleithrum, laterally bordered by two plates that contact only the pterotic-supracleithrum (vs. an azygous plate, often divided anteriorly in small secondary platelets, not connecting the pterotic-supracleithrum, and with two lateral areas divided in multiple platelets, 4-13, bordering the postero-lateral part of the supraoccipital and the posterior part of the pterotic-supracleithrum (Ref. 90186).
Facultative air-breathing (Ref. 126274); This species inhabits the lower part of rivers still under tide influence, and characterized by a quiet flowing water and muddy substrate, and swamps (Ref. 90186). Feeds on algae and small crustaceans. Is cultured in ponds in Singapore and Hong Kong for the aquarium trade, where it is very popular (Ref. 2060).
Deposits eggs on smooth rocks. Eggs are guarded by one or both parents. May deposit eggs in depressions (Ref. 2060).
Weber, C., R. Covain and S. Fisch-Muller, 2012. Identity of Hypostomus plecostomus (Linnaeus, 1758), with an overview of Hypostomus species from the Guianas (Teleostei: Siluriformes: Loricariidae). Cybium 36(1):195-227. (Ref. 90186)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Pesca: pesca di sussistenza; Acquario: elevato interesse commerciale
Strumenti
Special reports
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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=0.01995 (0.01624 - 0.02451), b=2.97 (2.94 - 3.00), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trophic level (Ref.
69278): 2.5 ±0.26 se; based on food items.
Resilienza (Ref.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (Assuming tmax>3; Fec = 3,000).
Fishing Vulnerability (Ref.
59153): Low vulnerability (20 of 100).
