n African Entomology - Effect of DeGeer, 1774 on smoked African catfish (Burchell, 1822) during storage

Volume 22, Issue 1
  • ISSN : 1021-3589


The nutritive benefits of the catfish, (Burchell, 1822), are threatened by its infestation by DeGeer, 1774 during storage. The influence of on stored was investigated in this study. Fifty smoked (117.5 ± 0.05 g) were sterilized by oven drying and randomly allotted into 10 boxes. Each box contained five fishes which were infested with larvae of at the beginning of the experiment and were stored for 0 (control), 14, 28, 42, and 56 days. The weight loss and proximate composition (crude fibre, ash, protein, fat, carbohydrate, Na+, K+, Mg+ and Fe2+) of the stored fish samples were analysed at the end of each period. The storage periods represented the treatments. Results revealed that the weight of experimental smoked fishes decreased as the storage duration increased. Similarly, the crude protein, ash and carbohydrate content of decreased as the days of infestation increased (crude protein varied from 67.00 % at day 0 to 36.84 % at day 56). The mineral composition of the experimental fishes likewise decreased with days of infestation. Regression analysis showed a strong positive relationship between protein (+0.95), fat (+0.90), K+ (+0.80) content of the fishes and duration of infestation. Thus, the nutritive quality of is highly reduced by infestation.

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