Journal
SCIENTIFIC AFRICAN
Volume 11, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.sciaf.2020.e00671
Keywords
African catfish; Aloe vera; Allium sativum; Herbs; Immunity; Stress resistance
Categories
Funding
- Sam Nujoma Marine and Coastal Resources Research Center, SANUMARC [4515/2901]
- Sam Nujoma Campus, University of Namibia
- Namibia National Commission on Research, Science and Technology (NCRST) [1NC0814/0015]
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The study found that adding 1.0% and 0.5% Aloe vera-Allium sativum mixture in diets significantly improved growth performance and feed utilization in African catfish.
This study evaluated the effects of dietary Allium sativum and Aloe vera polysaccharides mixtures on growth performance, feed utilization, hematological parameters, resistance against low water pH, and whole body composition of African catfish (Clarias gariepinus) juveniles. Fish were divided into 5 triplicate groups before being fed diets supplemented with 0% (control), 0.5%, 1.0%, 2.0% and 4.0% A. vera and A. sativum polysaccharides mixture /kg diet (1:1 proportion). Fish fed 1.0% and 0.5% A. vera-A. sativum mixture supplemented diet had a significant increase (P < 0.05) in growth compared to unsupplemented ones, and those fed 2.0% and 4.0%. Similarly, among dietary groups, feed utilization indices were significantly improved (P < 0.05) in fish fed 1.0% A. vera-A. sativum mixture supplemented diet when compared to unsupplemented ones, and those fed 2.0% and 4.0%. The optimum dietary A. vera-A. sativum mixture inclusion level was estimated to range between 0.66% and 0.8%. Overall, A. vera-A. sativum mixture extracts had improved hematological indices when compared to unsupplemented fish. Fish fed 1.0% A. vera-A. sativum mixture had the highest survival probability throughout the low water pH (5.0 - 57) challenge period. Moreover, fish fed diets supplemented with 1.0%, 2.0%, and 4.0% A. vera-A. sativum mixture had significantly lower lipid content (P < 0.05) among the various groups. To fully optimize these extracts as dietary supplement in aquaculture, further similar and extended studies are deemed important. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of African Institute of Mathematical Sciences / Next Einstein Initiative.
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