PROTEIN AND ENERGY REQUIREMENTS OF STRIPED MULLET Mugil cephalus LARVAE | ||||
| Journal of Animal and Poultry Production | ||||
| Article 6, Volume 25, Issue 8, August 2000, Page 4933-4947 PDF (822.59 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2000.259602 | ||||
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| Author | ||||
| A. A. El-Dahhar, | ||||
| 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%. | ||||
| Keywords | ||||
| Protein & Energy requirements; Striped mullet Larvae | ||||
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