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Yam-based biofloc system improves the growth, digestive enzyme activity, bacterial community structure and nutritional content in milkfish (Chanos chanos)
Aquaculture Research ( IF 2 ) Pub Date : 2021-02-28 , DOI: 10.1111/are.15190
Ravindra Sontakke 1 , Virendra Kumar Tiwari 1 , Paniprasad Kurcheti 1 , Babitha Rani Asanaru Majeedkutty 1 , Muralidhar P. Ande 1 , Harsha Haridas 2
Affiliation  

An experimental trial was conducted for 90 days to evaluate the effect of different carbon sources viz. yam and potato on growth performance of milkfish (Chanos chanos) in biofloc-based system. Milkfish fry (average body weight of 0.66 ± 0.01 g) was stocked in biofloc treatments, yam-based biofloc (BFY) and potato-based biofloc (BFP), and clear water (CW) as control in triplicates. Milkfish reared in biofloc-based units obtained significantly better (p < 0.05) performance in terms of growth, digestive enzyme activity and survival when compared to clear water control. Among the biofloc-based treatments, the highest average body weight (11.62 ± 0.24 g), specific growth rate (3.21 ± 0.01% day−1), percentage weight gain (1688.10 ± 19.05) and survival (90.83 ± 2.01%) were found in BFY group. Similarly, the essential amino acid and non-essential amino acid contents of biofloc and experimental fish were higher in BFY as compared to BFP. Additionally, the highest level of EPA (eicosapentaenoic acid), DHA (docosahexaenoic acid) and total n-6 and n-3 PUFA were found higher in BFY. Bacterial composition analysis showed that BFY treatment groups had a more diverse bacterial community than those with BFP treatment groups. This study demonstrated that biofloc-based culture system is suitable for rearing of C. chanos fry and the most preferable type of carbon source is found to be Yam.

中文翻译:

基于山药的生物絮团系统改善遮目鱼 (Chanos chanos) 的生长、消化酶活性、细菌群落结构和营养成分

进行了 90 天的实验试验以评估不同碳源的影响,即。山药和马铃薯在基于生物絮团的系统中对遮目鱼 ( Chanos chanos )生长性能的影响。遮目鱼鱼苗(平均体重 0.66 ± 0.01 克)在生物絮团处理中放养,山药生物絮团 (BFY) 和马铃薯生物絮团 (BFP) 以及清水 (CW) 作为对照,一式三份。与清水对照相比,在基于生物絮团的单位中养殖的遮目鱼在生长、消化酶活性和存活方面获得了显着更好的(p < 0.05)性能。在基于生物絮团的处理中,最高平均体重 (11.62 ± 0.24 g)、特定生长率 (3.21 ± 0.01% day -1)、BFY 组的体重增加百分比 (1688.10 ± 19.05) 和存活率 (90.83 ± 2.01%)。同样,与 BFP 相比,BFY 中生物絮团和实验鱼的必需氨基酸和非必需氨基酸含量更高。此外,在 BFY 中发现最高水平的 EPA(二十碳五烯酸)、DHA(二十二碳六烯酸)以及总 n-6 和 n-3 PUFA 含量更高。细菌组成分析表明,BFY 处理组比 BFP 处理组具有更多样化的细菌群落。该研究表明,基于生物絮团的培养系统适用于养殖C chanos鱼苗和最优选的碳源类型是山药。
更新日期:2021-02-28
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