Labeobarbus bynni (Forsskål, 1775)
Niger barb
photo by Bursell, J.J.

Family:  Cyprinidae (Minnows or carps), subfamily: Cyprininae
Max. size:  82 cm TL (male/unsexed)
Environment:  benthopelagic
Distribution:  Africa: Nile River and lakes once connected to the Nile system (Ref. 2801, 2959); Chad, Niger, Senegal, Volta, Ouémé and Ogun river basins (Ref. 2940, 81282); coastal rivers (Sassandra, Bandama, Niouniourou, Comoé and Tano) of Côte d'Ivoire and Ghana, west of the Volta basin. Following subspecies are recognized: Labeobarbus bynni bynni; Labeobarbus bynni occidentalis and Labeobarbus bynni waldroni.
Diagnosis:  Dorsal spines (total): 1-1; Dorsal soft rays (total): 12-13; Anal soft rays: 8-8. Diagnosis: last simple dorsal-fin ray forming ossified spine longer than head in specimens over 150 mm SL. B. bynni occidentalis: scale formula 5.5/26-31/4.5-5.5; 2.5-3 scales between lateral line and middle of belly, behind pelvic-fin origin; 12 scales around caudal peduncle; 9 dorsal fin branched rays; 3-5/12-15 gill rakers on first gill arch (Ref. 2940, 81282). B. bynni waldroni: scale formula 4.5/24-28/4.5; 2.5 scales between lateral line and middle of belly, behind pelvic-fin origin; 12 scales around caudal peduncle; 9-10 dorsal fin branched rays; pectoral fin with 1 spine and 14-16 soft rays; 3-6/14-17 gill rakers on first gill arch (Ref. 2940, 81282). Description: large species, body rather deep in adults and slightly compressed; lips well developed, forming rounded mental disk; lips may be hypertrophic ("rubber-lip") in some individuals of B. bynni waldroni; last simple dorsal-fin ray forms thick spine in adults; spine grows, being shorter than head in juveniles and longer than head in specimes over 150 mm SL; longest dorsal-fin ray is first branched ray; distal margin of dorsal fin slightly concave (Ref. 2940, 81282). Coloration: B. bynni occidentalis: sides yellowish tinged with orange, back greyish; fins more or less bright yellow except for caudal fin, which is orange in juveniles and medium-sized adults, and greyish in older fish; distal margins of dorsal and caudal fins black-edged; preserved specimens brownish (Ref. 2940, 81282). B. bynni waldroni: ground color yellowish to greenish; fins colourless; dorsal and caudal sometimes tinged with violet-pink (Ref. 2940, 81282).
Biology:  Feed on crustaceans, insects, mollusks and organic debris. In the Jebel Aulia Reservoir, annual spawning coincides with the onset of the floods. Fecundity estimates ranged from 72 x 1,000 at 33 cm (4 yrs.) to over 14 x 10,000 at 74 cm (8 yrs).
IUCN Red List Status: Least Concern (LC); Date assessed: 01 May 2009 Ref. (120744)
Threat to humans:  harmless
Country info:   

Entered by: Sa-a, Pascualita - 22.06.94
Modified by: Torres, Armi G. - 06.06.17
Checked by: Boden, Gert - 03.02.13

Source and more info: For personal, classroom, and other internal use only. Not for publication.

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