The administration of Lactobacillus plantarum directly to food: An effective way to improve the survival and growth of juvenile lined seahorses (Hippocampus erectus)

文献类型： 外文期刊

第一作者： Lin, Tingting

作者： Lin, Tingting;Liu, Xin;Zhang, Dong;Cai, Yishan;Yan, Zhenzhen;Cai, Yishan;Yan, Zhenzhen

作者机构：

关键词： administration manner; copepods; Hippocampus erectus; lactic acid bacteria; Lactobacillus plantarum

期刊名称：AQUACULTURE RESEARCH （ 影响因子：2.082； 五年影响因子：2.415 ）

ISSN： 1355-557X

年卷期： 2019 年 50 卷 9 期

页码：

收录情况： SCI

摘要： Previously, we found Lactobacillus plantarum had probiotic effects on lined seahorse (Hippocampus erectus) juveniles by the addition Lactobacillus directly into rearing seawater containing juveniles and their food (i.e. copepods). However, how the juveniles consumed Lactobacillus, directly from water or from copepods in whose guts Lactobacillus may have accumulated by ingestion, is still unclear. To clarify this, three experiments were successively carried out in this study. In the first experiment, the manner by which juveniles consumed Lactobacillus, namely, directly from food, was discovered via a 2 x 2 factorial design with two factors of water and food, and two levels with and without L. plantarum. In the second experiment, a 5 x 4 factorial design with five levels of L. plantarum doses (D: 5, 10, 20, 40 and 80 x 10(8) cfu/L) and four levels of enrichment time (T: 0.5, 1.0, 1.5 and 2.0 hr) was conducted to analyse lactic acid bacteria (LAB) contents in the enriched copepods under different treatments. In the third experiment, six kinds of Lactobacillus-enriched copepods chosen from the second experiment that carried significantly different LAB contents were fed to juveniles, and it was found that the copepods containing LAB greater than 5 log(10)colonies/g had the most improved effects for survival and growth. In conclusion, the effective manner of L. plantarum administration in seahorses is by the addition to their food. Additionally, D40 * T1.0, whose LAB content was more than 5 log(10)colonies/g, is generally the most economic copepod treatment for improving survival and growth in H. erectus rearing.

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