Scholarlink

<p>This study evaluated the probiotic potential of <i>Marichromatium gracile</i> DH-1 for improving the performance of juvenile <i>Hippocampus abdominalis</i> in aquaculture. A 40-day trial was conducted to evaluate the effects of the marine photosynthetic bacterium <i>M. gracile</i> DH-1 on early juvenile seahorses (<i>H. abdominalis</i>), using four treatments with three replicate tanks per treatment (<i>n</i> = 3) and an initial stocking density of 200 individuals per tank. Juveniles were exposed to <i>M. gracile</i> DH-1 at 25, 50, and 100 ppm (corresponding to 2.5 × 10<sup>2</sup>, 5.0 × 10<sup>2</sup>, and 1.0 × 10<sup>3</sup> CFU/mL, respectively) in the rearing water. Compared with the control, water-borne <i>M. gracile</i> DH-1 supplementation significantly improved growth performance, including body length, body weight gain, specific growth rate, and condition factor. The highest survival rate was recorded in the 100 ppm (1.0 × 10<sup>3</sup> CFU/mL) group (12.0%) versus 1.33% in the control group. <i>M. gracile</i> DH-1 also enhanced digestive enzyme activities, particularly α-amylase and total protease, and increased antioxidant enzyme activities, including catalase and glutathione peroxidase. In addition, supplementation improved intestinal microbial composition by increasing beneficial taxa and reducing potentially harmful bacteria. Water quality was also improved, as indicated by reduced ammonia nitrogen and nitrite, together with increased dissolved oxygen. These results suggest that <i>M. gracile</i> DH-1 is a promising probiotic candidate for juvenile seahorse culture by enhancing growth performance, antioxidant defense, intestinal microbial balance, and water quality.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Probiotic Effects of Marichromatium gracile DH-1 on Growth, Stress Resistance, and Water Quality in Juvenile Seahorses: A Potential Strategy for Sustainable Aquaculture

  • 期刊论文

  • 发表日期：

    2026年6月3日

查看全文
  • Kai-Hua Geng,
  • Shuai Liang,
  • Yi Zhang,
  • Ya-Juan Wang,
  • Tian-Yu Lu,
  • Yunfeng Liu,
  • Tian Lan,
  • Ya-Nan Lu,
  • Yu-Ting Cong,
  • Yuan Wang,
  • Li Wang,
  • Lian-Shun Wang,
  • Guo-Jun Yang,
  • Hua Wang

摘要

This study evaluated the probiotic potential of Marichromatium gracile DH-1 for improving the performance of juvenile Hippocampus abdominalis in aquaculture. A 40-day trial was conducted to evaluate the effects of the marine photosynthetic bacterium M. gracile DH-1 on early juvenile seahorses (H. abdominalis), using four treatments with three replicate tanks per treatment (n = 3) and an initial stocking density of 200 individuals per tank. Juveniles were exposed to M. gracile DH-1 at 25, 50, and 100 ppm (corresponding to 2.5 × 102, 5.0 × 102, and 1.0 × 103 CFU/mL, respectively) in the rearing water. Compared with the control, water-borne M. gracile DH-1 supplementation significantly improved growth performance, including body length, body weight gain, specific growth rate, and condition factor. The highest survival rate was recorded in the 100 ppm (1.0 × 103 CFU/mL) group (12.0%) versus 1.33% in the control group. M. gracile DH-1 also enhanced digestive enzyme activities, particularly α-amylase and total protease, and increased antioxidant enzyme activities, including catalase and glutathione peroxidase. In addition, supplementation improved intestinal microbial composition by increasing beneficial taxa and reducing potentially harmful bacteria. Water quality was also improved, as indicated by reduced ammonia nitrogen and nitrite, together with increased dissolved oxygen. These results suggest that M. gracile DH-1 is a promising probiotic candidate for juvenile seahorse culture by enhancing growth performance, antioxidant defense, intestinal microbial balance, and water quality.