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Ichthyborus besse (Joannis, 1835)

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drawing shows typical species in Distichodontidae.


Sudan (North) country information

Common names: Alekagurgur, Atem duor, Cwak
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the White Nile (Ref. 28714, 120561).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/su.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Moritz, T., Z.N. El Dayem, M.A. Abdallah and D. Neumann, 2019
National Database:

Common names from other countries

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

> Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Ichthyborus: Greek, ichthyboros, -os, -on = that eats fishes (Ref. 45335).

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

; Γλυκού νερού Πελαγικό(ά).   Tropical

Κατανομή Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri

Africa: White Nile basin (Ref. 2936, 28714), Chad basin and Benue River (Ref. 2936, 86396).

Length at first maturity / Μέγεθος / Βάρος / Age

Maturity: Lm 14.0  range ? - ? cm
Max length : 25.0 cm TL αρσενικό/απροσδιόριστο; (Ref. 28714)

Short description Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία

Diagnosis: body depth 4.7-6.2 and head length 3.1-3.8x SL; caudal peduncle 1.5-2x longer than high; head flattened, 2.9-3.5 longer than wide; eye diameter 4-7x of head length; scale formula 12.5-14.5/90-107/13.5-14.5; single, dark, undulating longitudinal band along lateral line (not visible in live specimens); caudal-fin lobes marked with oblong black spots (Chad and Benué) (Ref. 2936, 86396).

Βιολογία     Γλωσσάρι (π.χ. epibenthic)

Maximum TL was recorded at 24.5 cm (Ref. 7094). Inhabits open water and fringing vegetation. Feeds on Caridina and fish fry (Ref. 28714).

Life cycle and mating behavior Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες

Main reference Upload your references | Αναφορές | Συντονιστής | Συνεργάτες

Gosse, J.-P. and E.J. Coenen, 1990. Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 28 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FishSource |

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Trophic ecology
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Diet compositions
Food consumptions
Food rations
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Ecology
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Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Αναπαραγωγή
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Human related
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Προφίλ υδατοκαλλιεργειών
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Ciguatera cases
Stamps, coins, misc.
References
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Διαδικτυακές πηγές

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00147 - 0.00981), b=3.11 (2.88 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Τροφικό Επίπεδο (Ref. 69278):  4.0   ±0.3 se; based on diet studies.
Ελαστικότητα (Ref. 120179):  Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (K=0.6).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (23 of 100).