EVALUATION OF MALLOW (Malva parviflora L.) PLANTS AS AN ALTERNATIVE PROTEIN SOURCE FOR NILE TILAPIA , (Oreochromis niloticus) FINGERLINGS | ||||
| Journal of Animal and Poultry Production | ||||
| Article 7, Volume 29, Issue 12, December 2004, Page 6899-6910 PDF (3.55 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2004.239477 | ||||
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| Authors | ||||
| A. M. Abd Elhamid,1; M. F. I. Salem2; A. E. Tolan2 | ||||
| 1Department of Animal production, Fac. Agric., Mansoura Univ. | ||||
| 2Centeral laboratory for Aquaculture Research, Abbassa-Sakha Aquaculture Research Unit. | ||||
| Abstract | ||||
| This study was conducted to evaluate the suitability of dried mallow plant, Malva parviflora L., as an alternative protein source for Nile tilapia. Three experimental diets were formulated to contain this plant meal at levels of 10, 20 and 30% of the total dietary protein (diets 2, 3 and 4, respectively) and one diet acting as a control (diet 1) which included only fish meal, and soybean meal as protein sources. The four diets were isonitrogenous (26%) and isocaloric (4400 kcal GE/kg dry matter of feed). The feeding experiment extended for 10 weeks. The results of this experiment showed that the best growth rate and FCR (1.8S) were observed by fish group fed the control diet, while the poorest FCR (2.0S) was observed by fish group fed diet 4, where 30% of its soybean protein was replaced by mallow meal protein. Slight decrease in protein efficiency ratio (PER) and protein productive value (PPV) was reported when the soybean protein was replaced by the mallow protein. The control group showed slightly higher protein and fat contents than the tested groups. The differences in PER were not significant (P>O.OS) among groups fed diets No.1, 2 and 3. While differences were significant (P<O.OS) among diets No. 1 and 3 on one side and diet No. 4 on the other side. Diets with higher inclusion levels of mallow (diets 3 and 4) significantly depressed growth performance of the fish (SGR 1.S2%/day) in both groups compared to diets 1 and 2 (SGR: 1.74% and 1.68%/day, respectively). There were differences in muscular area among diet 1 and other treated groups showed larger muscular area for the control and those fed on 10% mallow than for those fed on 20 and 30% mallow. There were also differences in organs weight among fish groups, where higher indices were calculated for groups fed diets 1 and 2 than for diets 3 and 4. The 20% inclusion level of mallow realized the lowest feed cost/kg fish gain. These results suggest that mallow can be used to substitute up to 10% of dietary protein in Nile tilapia diets without significant reduction in growth. | ||||
| Keywords | ||||
| Nile tilapia; Mallow; performance; Muscular area | ||||
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