El-Dahhar,, A. (2000). PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE. Journal of Animal and Poultry Production, 25(8), 4933-4947. doi: 10.21608/jappmu.2000.259602
A. A. El-Dahhar,. "PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE". Journal of Animal and Poultry Production, 25, 8, 2000, 4933-4947. doi: 10.21608/jappmu.2000.259602
El-Dahhar,, A. (2000). 'PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE', Journal of Animal and Poultry Production, 25(8), pp. 4933-4947. doi: 10.21608/jappmu.2000.259602
El-Dahhar,, A. PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE. Journal of Animal and Poultry Production, 2000; 25(8): 4933-4947. doi: 10.21608/jappmu.2000.259602
PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE
Animal and Fish Production Department, Faculty of Agriculture (Saba Basha) Alexandria University PO Box 21531, Bolkly Alexandria Egypt
Abstract
Two experiments were carried out to determine protein and energy requirements of striped mullet (Mugil cephalus) larvae for maintenance and maximum growth. In experiment 1 a diet containing 38% dietary crude protein and 2.45 kcal metabolizable energy / g was fed at seven incremental rates [1-13% of body weight (BW) daily] to larvae (0.195g initial BW) for 5 wk. In experiment 2, seven isocaloric diets containing (14-38% crude protein levels) were fed at satiate rate of feeding to larvae (0.2g initial BW) for 6 wk. In experiment 1, Striped mullet BW increased linearly as feeding rate increased, up to 34.61mg protein and 345.6cal gross energy / g BW daily (r2 = 0.99), and also as dietary crude protein increased up to 26% in experiment 2 (r2 = 0.99). The relationships between BW gain (Y) and the increase of protein and energy intake (X), could be expressed by the equations Y = - 58.06 + 16.20 X for protein and Y= - 57.98 +1.62 X for gross energy. Also, the increase in body protein and energy (Y) with the increase of protein and energy intake (X) could be expressed by the equations Y = - 11.33 + 2.68 X; r2 = 0.98 for protein and Y = -85.67 + 3.48 X; r2 = 0.99 for energy. From the mathematical models, maintenance requirements of striped mullet (0.195g initial BW) could be estimated as Y= 0 to be 3.6 - 4.2 mg protein /(g BW .d) and 24.6 - 35.8 cal gross energy /(g BW .d). Thus the data could recommend 3.9mg protein and 30.2cal gross energy /g BW daily as maintenance requirements for striped mullet larvae of 0.195g initial BW. Also, from the same data 34.6mg protein and 345.6 cal gross energy /g BW daily could be recommended as the maximum growth requirements for the same striped mullet larvae. The data of experiment 2, indicate that 26 % dietary crude protein is the dietary crude protein needed for maximum growth and feed efficiency of 0.2g striped mullet fed at incremental dietary crude protein levels from 14-38%.
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