Clarias gariepinus

The use of egg diets and fish meal as a starter diets for Clarias gariepinus fry after endogenous feeding was investigated for 42 days. The experiment was designed to determine the effects of egg diets on growth performance of C. gariepinus. The experimental diets were assigned into three treatments and control.

ABSTRACT: Sustainable and stable production of fish larvae requires diet that will enhance efficient nutrient utilization and growth performance.

The indiscriminate discharge of the wastewater generated during the processing of Manihot esculenta Crantz into the environment or public sewers remains a source of concern. In this study, the acute toxicity (96-h LC50) of cassava effluent was evaluated using Clarias gariepinus juveniles and Egera radiata. The two organisms were exposed to different concentrations of the effluent using a renewable static bioassay with continuous aeration. The LC50 of exposed C. gariepinus juveniles was found to be 1.92 ml/L with lower and upper confidence limits of 1.35 ml/L and 2.19 ml/L, while that of E.

120 fingerlings of Clarias gariepinus were fed five different experimental 35% isoproteic diets, a control (0% water hyacinth) and four diets containing different levels of water hyacinth (10%, 20%, 30% and 40%) in place of fish meal as protein source at %% of the body weight for 70 days under laboratory condition. The study revealed a decrease in the growth performance indices as the level of water hyacinth increases.

 This study is to determine the effect of wastewater disposal from the Warri Refinery and Petrochemical Company (WRPC) on the DNA integrity in the African catfish, Clarias gariepinus juveniles exposed to 1, 10, 20 and 30 % (v/v) of the wastewater.

Susceptibility responses of cat fish – Clarias gariepinus to infection with Pseudomonas aeruginosa visà-vis treatment with chloramphenicol were investigated in the present study. Thirty healthy and physically active fishes weighing between 200-350g sourced from Challawa Gorge Dam, Karaye, Kano State were used for the study. These were divided into three aquarium tanks A, B, C (ten in each case). Fishes in A were infected with 1.0ml (about 1.2 x 106 cfu/ml) of Pseudomonas aeruginosa pyrenterally through linea alba by ventral medial furrow.

Fish feed account for over 70% of the total cost of fish production, this is due to the high cost of its components most especially fishmeal which is highly expensive and imported. Trials to replace costly fishmeal in fish diets with maggot meal have shown promising results. However, wide use of maggot meal in aquaculture feed industry is limited due to unavailability of adequate amounts of maggot meal. Therefore, this study was carried out to determine the best possible substrates and attractants combination for production of housefly larvae.

Susceptibility responses of cat fish – Clarias gariepinus to infection with Pseudomonas aeruginosa vis-à-vis treatment with chloramphenicol were investigated in the present study. Thirty healthy and physically active fishes weighing between 200-350g sourced from Challawa Gorge Dam, Karaye, Kano State were used for the study. These were divided into three aquarium tanks A, B, C (ten in each case). Fishes in A were infected with 1.0ml (about 1.2 x 106 cfu/ml) of Pseudomonas aeruginosa pyrenterally through linea alba by ventral medial furrow. This was