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Distichodus rostratus  Günther, 1864

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

Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Distichodus: Greek, di = two + Greek, stix, stichos = line, row (Ref. 45335).   More on author: Günther.

Environment / Climate / Range Ecology

Freshwater; demersal; pH range: 6.5 - 7.5; dH range: ? - 15; potamodromous (Ref. 51243).   Tropical; 22°C - 28°C (Ref. 12468)

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

Africa: present from Senegal to the Chad basin (Ref. 2936, 86396). Absent in coastal basins between southern Gambia and Sassandra (Ref. 2936, 86396). Also found in the Nile (Ref. 2936, 7094, 81638) and in the Cross River system (Ref. 81638, 86396).

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 30 - ? cm
Max length : 76.0 cm TL male/unsexed; (Ref. 7094); max. published weight: 6.3 kg (Ref. 7094)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 21-27; Anal spines: 0; Anal soft rays: 13 - 17. Diagnosis: mouth subterminal; body depth 2.7-3.6x and head length 3.3-5.5x SL; caudal peduncle 0.7-1.1x longer than wide; 12-15 scales between lateral line and scaly process at bases of pelvic fins; eye diameter 3.3 (juveniles)-7x head length; juveniles with vertical bars on sides (Ref. 2936, 86396). Round humeral spot present (less obvious in larger individuals); body never with small, dark, eye-sized spots (Ref. 81638). 83-94 lateral line scales (Ref. 2936, 81638, 86396). 21-26 (Ref. 86396) or 21-27 (Ref. 81638) total dorsal fin rays. 13-16 (Ref. 86396) or 13-17 (Ref. 81638) total anal fin rays.

Biology     Glossary (e.g. epibenthic)

Marco-herbivores, feed on submerged plants, Eichornia roots and periphyton (Ref. 28714). Maximum length 62.5 cm SL (Ref. 2936, 81638, 86396).

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

Main reference Upload your references | References | Coordinator | Collaborators

Vari, R.P., 2007. Distichodontidae. p. 412-465. In M.L.J. Stiassny, G.G. Teugels and C.D. Hopkins (eds.) The fresh and brackish water fishes of Lower Guinea, West-Central Africa. Volume I. Collection Faune et Flore tropicales 42. Institut de Recherche pour le Développement, Paris, France, Muséum National d’Histoire Naturelle, Paris, France, and Musée Royal de l’Afrique Centrale, Tervuren, Belgium. 800 pp. (Ref. 81638)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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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=0.01122 (0.00677 - 0.01860), b=3.01 (2.86 - 3.16), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  2.6   ±0.25 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Moderate to high vulnerability (52 of 100) .
Price category (Ref. 80766):   Unknown.