| Dietary organic acids efficiency in Asian sea bass (Lates calcarifer) aquaculture |
| Paper ID : 1048-ICIAQUA |
| Authors |
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Mansour Torfi Mozanzadeh *1, Seyed Hossein Hoseinifar2 1South Iran Aquaculture Research Centre, Iranian Fisheries Science Institute (IFSRI), Agricultural Research Education and Extension organization (AREEO), Ahwaz, Iran 2Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran |
| Abstract |
| Abstract Purpose: Asian seabass (Lates calcarifer) has many desirable characteristics that has made it as leading farmed marine fish species for cage culture in Persian Gulf and Oman Sea Regions, such as high growth rate, tolerance to water salinity and high temperature, and desirable feed conversion ratio. For increasing the efficiency of formulated diets in this species, a series of studies were conducted to evaluate the effects of organic acids (OA) on growth and health status of this species. Methods: In this presentation, the efficiencies of various organic acids such as sodium diformate (NaDF), butyric acid (BA), fulvic acid (FA) or their mixture on the growth and health condition of Asian seabass during grow-out phase. These OA were supplemented to a basal diet at a dose-response manner and the studies were conducted between 56 to 60 days. The husbandry of fish was conducted in marine water and fish fed to the experimental diets up to visual satiation level. At the end of the feeding trial, sampling of fish was carried out to evaluate growth and health status of fish Results: Based on the findings, the inclusion of 0.5% SaDF or BA not only enhanced growth rate and feed utilization, but also boosted up digestive enzymes activity and immunocompetence (e.g., serum lysozyme, and hemolytic activities) in this species). In addition, supplementing diet with 0.5% FA profoundly enhanced growth, feed efficiency, immune responses, stress tolerance and disease resistance against Vibrio harveyi in this species. Finally, the incluasion of diet with the mixture of above-mentioend organic acids (1:1:1 ratio) in a plant protein-rich diet at 0.5% level not only ameliorate the negative effects of anti-nutrients presents in plant protein sources, but also induced th up-regulation of nterleukine-10 and granulocyte-macrophage colony-forming cell genes in this species. Conclusion: Based on these findings, the inclusion of organic acids up to 0.5% in Asian seabass diet could be beneficial for growth performance and health status of this species. |
| Keywords |
| Acidifiers, short chain fatty acids, Late calcarifer, mariculture, feed utilization |
| Status: Abstract Accepted (Oral Presentation) |