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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Studies on the biology of two species of catfish Synodontis schall and Synodontis nigrita (Ostariophysi : Mochokidae) from the Oueme River, Benin

Philippe Laleye, Antoine Chikou, Pierre Gnohossou, Pierre Vandewalle, Jean Philippart and Guy Teugels (2006)

Studies on the biology of two species of catfish Synodontis schall and Synodontis nigrita (Ostariophysi : Mochokidae) from the Oueme River, Benin

BELGIAN JOURNAL OF ZOOLOGY, 136(2):193-201.

The abundance and distribution, length-weight, condition factor, diet and reproduction of Synodontis schall and S. nigrita from the Oueme (Benin) are described. S. nigrita is less abundant than S. schall in the river. Both species are euryphagous with their diet containing a wide variety of food items that include various types of plankton, invertebrates and plants. This high diversity of the food composition indicates a wide adaptability to the habitats in which they live. This is an important strategy for survival and an advantage over the fish species competing for a specific food item. Size at maturity differs between species for both males (15 cm TL for S. schall and 21 cm TL for S. nigrita) and females (16 cm and 22 cm, respectively). Fecundity range is higher for S. schall (1841 15076 oocytes) compared to that of S. nigrita (2647 - 9212). Peak values of GSI for males and females in both species occurred from mid- to late July, indicating one season of major spawning activity per year.

Synodontis schall; Synodontis nigrita; biology; Oueme river; Benin
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
1923-1989
Annales de la Société Royale Zoologique de Belgique
 
1989-
Belgian Journal of Zoology