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首页> 外文期刊>Indian Journal of Fisheries >Beneficial antagonistic bacteria from freshwater fishes and culture environment as probiotics in ornamental fish culture
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Beneficial antagonistic bacteria from freshwater fishes and culture environment as probiotics in ornamental fish culture

机译：淡水鱼和养殖环境中的有益拮抗细菌作为观赏鱼养殖中的益生菌

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摘要

A search for beneficial antagonistic bacteria from freshwater fishes and culture environment, and their use as probiotics in ornamental fish culture was attempted. In freshwater fishes, the antagonistic bacterial populations were found to be in the range of <0.002 -13.12% of the total population; while in ornamental fish culture environment, their populations were in the range of <0.14 - 24.39%. Asporogenous Gram-positive rods (31.7%) and aerobic spore forming Bacillus spp. (30%) were the dominant antagonist groups followed by Micrococcus (18.3%),Lactobacillus, Lactococcus and Streptococcus in the fish gut. Eighteen opportunistic fish pathogenic bacteria belonging to the genera Aeromonas, Bacillus, Citrobacter and Pseudomonas were inhibited by the antagonistic bacterial strains in vitro at varying levels. The potential probiotic strains, Bacillus sp. P43 and Lactobacillus sp. P21 from fish gut were capable of adhering to different substrates and conferred protection to Carassius auratus and Xiphophorus helleri. Bacillus sp. P43 survived well both in pelleted feed and water while the Lactobacillus sp. P21 failed to do so. The dominance of Gram-positive antagonistic bacteria in freshwater fishes imply that these bacteria could be useful as probiotics and / or biocontrol agents in freshwater ornamental fish culture.
机译：试图从淡水鱼类和养殖环境中寻找有益的拮抗细菌，并​​将其用作益生菌在观赏鱼养殖中的用途。在淡水鱼中，发现拮抗细菌的数量在总数量的<0.002 -13.12％范围内;在观赏鱼养殖环境中，其种群范围在<0.14-24.39％之间。产孢子的革兰氏阳性棒（31.7％）和好氧孢子形成芽孢杆菌。 （30％）是主要的拮抗剂组，其次是鱼肠中的微球菌（18.3％），乳酸杆菌，乳球菌和链球菌。在体外，拮抗性细菌菌株抑制了气单胞菌属，芽孢杆菌属，柠檬酸杆菌属和假单胞菌属的十八种机会鱼类致病菌。潜在的益生菌菌株芽孢杆菌。 P43和乳杆菌鱼肠中的P21能够粘附到不同的底物上，并赋予金Car鱼和黑剑客鱼保护。芽孢杆菌在乳杆菌中，P43在颗粒饲料和水中均存活良好。 P21没有这样做。淡水鱼中革兰氏阳性拮抗细菌的优势表明，这些细菌可用作淡水观赏鱼养殖中的益生菌和/或生物防治剂。

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