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Megaleporinus obtusidens (Valenciennes, 1837)

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Megaleporinus obtusidens
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Argentina country information

Common names: Açu, Boga, Bogón
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the Paraná, Uruguay and Paraguay River basins (Ref. 93038). Found also Also Ref. 9086, 11229, 51923, 56308. Status of theat: Indeterminate (Ref. 51923).
National Checklist: Argentina
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ar.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Britski, H.A., J.L.O. Birindelli and J.C. Garavello, 2012
National Database:

Common names from other countries

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Anostomidae (Headstanders)
Etymology: Megaleporinus: Name from Greek 'mega' meaning large or largest, plus Leporinus, the genus which most species (now in this genus) were previously assigned; refrring to the large size of most congeners..
  More on author: Valenciennes.

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

; sötvatten bentopelagisk; flodvandrande (Ref. 51243).   Subtropical

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

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

Length at first maturity / Size / Vikt / Age

Maturity: Lm 21.6  range ? - ? cm
Max length : 76.0 cm TL hane/ej könsbestämd; (Ref. 79585); publicerad maxvikt: 5.8 kg (Ref. 79585)

Short description Bestämningsnycklar | Morfologi | Morfometri

Mjukstrålar i ryggfenan (totalt) : 11 - 12; Mjukstrålar i analfenan: 10 - 11; Ryggkotor: 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)

Biologi     Ordlista (t.ex. 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 Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

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

Main reference Upload your references | referenser | Koordinator : Garavello, Júlio | Medarbetare

Ramirez, J.L., J.L.O. Birindelli and P.M. Galetti Jr., 2017. A new genus of Anostomidae (Ostariophysi: Characiformes): Diversity, phylogeny and biogeography based on cytogenetic, molecular and morphological data. Molecular Phylogenetics and Evolution, 107: 308-323. (Ref. 113781)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 05 September 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fiskeri: kommersiell; Vattenbruk: kommersiell; sportfisk: ja
FAO(Publication : search) | FishSource |

Ytterligare information

Trophic ecology
Födoslag
Diet compositions
Food consumptions
Food rations
Predatorer
Ecology
Ekologi
Home ranges
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Reproduktion
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larver
Larvdynamik
Distribution
Länder
FAO områden
Ekosystem
Förekomster
Utplanteringar
BRUVS - Videos
Anatomy
Gill areas
Hjärnstorlek
Otoliths
Physiology
Body compositions
Nutrients
Oxygen consumptions
Swimming type
Swimming speeds
Visual pigment(s)
Fiskljud
Diseases / Parasites
Toxicities (LC50s)
Genetics
Genetik
Electrophoreses
Heritabilities
Human related
Aquaculture systems
Vattenbruksprofiler
Avelslinjer
Ciguatera cases
Stamps, coins, misc.
Outreach
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References
referenser

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00905 - 0.01391), b=3.09 (3.04 - 3.14), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trofisk nivå (Ref. 69278):  3.2   ±0.17 se; based on food items.
Resiliens (Ref. 120179):  Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (K=0.19).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (50 of 100).
Price category (Ref. 80766):   Unknown.