Author/Authors :
OGUNJI, J. Ebonyi State University - Department of Fisheries and Aquaculture, Nigeria , OGUNJI, J. Institute of Freshwater Ecology and Inland Fisheries, Germany , PAGEL, T. Institute of Freshwater Ecology and Inland Fisheries, Germany , SCHULZ, C. Institut für Tierzucht und Tierhaltung, Germany , KLOAS, W. Institute of Freshwater Ecology and Inland Fisheries, Germany , KLOAS, W. Humboldt University - Institute of Biologyocrinology - Department of End, Germany
Abstract :
To evaluate the digestibility of house fly maggot meal (magmeal) formulated reference diet (containing fishmeal as primary protein source) and a test diet (containing 70% reference diet + 30% maggot meal) were fed to triplicate groups of tilapia and carp with initial average body weights of 108.3±32 and 110.3±23 g, respectively. Faeces were collected over a period of 15 days by siphoning. The apparent digestibility coefficients (ADCs) of magmeal calculated for tilapia (dry matter: 47.65%, crude protein: 57.7%, crude fat: 86.1%; gross energy: 58.1%) were significantly lower than that for carp (dry matter: 63.84%, crude protein: 84.9%, crude fat: 96.8%, energy: 74.9%). Spawning activities of experimental tilapia and soft faeces consistency of carp may have affected the results.
