Leporinus obtusidens  (Valenciennes, 1837)

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Leporinus obtusidens
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Anostomidae (Headstanders)
Etymology: Leporinus: Latin, lepus, leporis = rabbit (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; potamodromous (Ref. 51243).   Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Paraná, La Plata and São Francisco, Uruguay, Paraguay, Guaíba and Parnaíba River basins

Length at first maturity / Size / Weight / Age

Maturity: Lm 21.6  range ? - ? cm
Max length : 76.0 cm TL male/unsexed; (Ref. 79585); max. published weight: 5.8 kg (Ref. 79585)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 11-12; Anal soft rays: 10 - 11; Vertebrae: 39. Can be diagnosed from most congeners, except Leporinus amblyrhynchus, L. conirostris, L. desmotes, L. despaxi, L. elongatus, L. jatuncochi, L. macrocephalus, L. muyscorum, L. piavussu, L. reinhardti, L. trifasciatus and L. wolfei, by possessing three teeth on each premaxilla and dentary (tooth formula 3/3; vs. tooth formulae 3/4, 4/4 or 4/3). Differs from Leporinus amblyrhynchus, L. conirostris, L. desmotes, L. despaxi, L. jatuncochi, L. macrocephalus, L. muyscorum, L. reinhardti, L. trifasciatus and L. wolfei by having three dark rounded blotches on the body and dark transverse bars usually persistent in large specimens (vs. body with a dark midlateral stripe in L. amblyrhynchus, and L. despaxi; transverse dark bands in L. desmotes and L. jatuncochii; body pale except for a single dark blotch on the caudal peduncle in L. conirostris; first blotch, below the dorsal fin, transversely elongated in L. macrocephalus, L. trifasciatus and L. wolfei; transverse bars faded in large specimens of L. muyscorum; and the blotch on the caudal peduncle longitudinally elongated, not rounded, sometimes making contact with the second blotch in L. reinhardti). Can be further distinguished from Leporinus muyscorum by having six or seven scale rows between lateral line and dorsal-fin origin (vs. five); from Leporinus elongatus by having 16 scales rows around the caudal peduncle (vs. 12). Differs from a similar species Leporinus piavussu by having 41 to 43, rarely 44 perforated scales in the lateral line (vs. 39 to 40, rarely 41). Individuals of Leporinus obtusidens from the upper Rio Paraná basin can be separated from individuals of L. piavussu by having mouth directed somewhat or entirely downward, its cleft at horizontal through ventral orbital margin or slightly below (vs. mouth terminal, its cleft above horizontal through ventral orbital margin) (Ref. 93038)

Biology     Glossary (e.g. epibenthic)

Adults inhabit medium to large rivers accomplishing very long reproductive and feeding migration in rivers of the Paraná basin (Ref. 93038). They also occur in ponds. Omnivorous (Ref. 79585). Distinct pairs breed on densely grown weedy places (Ref. 205).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Distinct pairs breed on densely grown weedy places (Ref. 205).

Main reference Upload your references | References | Coordinator : Garavello, Júlio | Collaborators

Cordiviola de Yuan, E. and C. Pignalberi de Hassan, 1985. Fish population in the Paraná River: lentic environments of Diamante and San Pedro areas (Argentine Republic). Hydrobiologia 127:213-218. (Ref. 11229)

IUCN Red List Status (Ref. 115185)

  Least Concern (LC) 

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes
FAO(Publication : search) | FishSource |

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Internet sources

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00980 - 0.01409), b=3.07 (3.03 - 3.11), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.2   ±0.17 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.19).
Vulnerability (Ref. 59153):  High vulnerability (62 of 100) .
Price category (Ref. 80766):   Unknown.