Abstract
Stomach contents analyses of 330 specimens of the electric catfish, Malapterurus electricus (Gmelin 1789) (standard length, 10.1-30.5 cm) collected in Mahin Lagoon (southwestern Nigeria) established it as a bottom feeder. A preponderance of insects and prey fish, which accounted for 100% occurrence and > 18% of total volume in the stomachs of specimens, suggested a predatory habit. Carbohydrases (amylase, maltase), chitinase, proteases (pepsin, chymotrypsin, trypsin) and lipases were detected in different gut regions with different activity, which correlated with its predatory diet. KEY WORDS: digestive enzymes, stomach contents, food, electric catfish, Malapterurus electricus.
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