Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>)
This study aimed to investigate the effects of different water velocities on the growth performance, blood physiology, and digestive capacity of coral trout (<i>Plectropomus leopardus</i>) in a Recirculating aquaculture system (RAS). One hundred and twenty healthy, uniformly sized coral...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/4/862 |
| _version_ | 1797604822127476736 |
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| author | Zhenjia Qian Jincheng Xu Andong Liu Jianjun Shan Chenglin Zhang Huang Liu |
| author_facet | Zhenjia Qian Jincheng Xu Andong Liu Jianjun Shan Chenglin Zhang Huang Liu |
| author_sort | Zhenjia Qian |
| collection | DOAJ |
| description | This study aimed to investigate the effects of different water velocities on the growth performance, blood physiology, and digestive capacity of coral trout (<i>Plectropomus leopardus</i>) in a Recirculating aquaculture system (RAS). One hundred and twenty healthy, uniformly sized coral trout (body mass (92.01 ± 8.04) g; body length (15.40 ± 0.65) cm) were randomly assigned to three flow velocity groups (1 bl/s, 2 bl/s, and 2.5 bl/s) and one control group (0 bl/s). The results show that the weight gain rate (WGR) and specific growth rate (SGR) of coral trout in the 2.5 bl/s water flow velocity group were significantly lower than those in the control group and 1 bl/s water flow velocity group (<i>p</i> < 0.05), while their feed coefficient (FC) values were significantly higher than those of the control group and 1 bl/s water flow velocity group (<i>p</i> < 0.05). The blood glucose (GLU) concentration of coral trout in the 2 bl/s water flow velocity group and the 2.5 bl/s water flow velocity group significantly decreased compared to those in the control group (<i>p</i> < 0.05), while the lactic acid (LD) concentration increased. As the cortisol (COR) concentration and lipase (LPS) enzyme activity of coral trout did not significantly change (<i>p</i> > 0.05), the α- AMS enzyme activity significantly decreased (<i>p</i> < 0.05). Under 2.5 bl/s water flow velocity, the intestinal structure of coral trout changed, and the number of goblet cells decreased. High-water flow velocities affect the physiological homeostasis and intestinal digestion of coral trout, resulting in a decrease in their growth performance, indicating that coral trout is more sensitive to high-water flow velocities. In actual RAS aquaculture, the flow rate should be controlled within 1 bl/s. |
| first_indexed | 2024-03-11T04:52:13Z |
| format | Article |
| id | doaj.art-a21b4d94243f46b0b09e76b0f63728fc |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T04:52:13Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-a21b4d94243f46b0b09e76b0f63728fc2023-11-17T19:57:06ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-04-0111486210.3390/jmse11040862Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>)Zhenjia Qian0Jincheng Xu1Andong Liu2Jianjun Shan3Chenglin Zhang4Huang Liu5College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, ChinaFishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, ChinaFishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, ChinaFishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, ChinaFishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, ChinaFishery Machinery and Instrument Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200092, ChinaThis study aimed to investigate the effects of different water velocities on the growth performance, blood physiology, and digestive capacity of coral trout (<i>Plectropomus leopardus</i>) in a Recirculating aquaculture system (RAS). One hundred and twenty healthy, uniformly sized coral trout (body mass (92.01 ± 8.04) g; body length (15.40 ± 0.65) cm) were randomly assigned to three flow velocity groups (1 bl/s, 2 bl/s, and 2.5 bl/s) and one control group (0 bl/s). The results show that the weight gain rate (WGR) and specific growth rate (SGR) of coral trout in the 2.5 bl/s water flow velocity group were significantly lower than those in the control group and 1 bl/s water flow velocity group (<i>p</i> < 0.05), while their feed coefficient (FC) values were significantly higher than those of the control group and 1 bl/s water flow velocity group (<i>p</i> < 0.05). The blood glucose (GLU) concentration of coral trout in the 2 bl/s water flow velocity group and the 2.5 bl/s water flow velocity group significantly decreased compared to those in the control group (<i>p</i> < 0.05), while the lactic acid (LD) concentration increased. As the cortisol (COR) concentration and lipase (LPS) enzyme activity of coral trout did not significantly change (<i>p</i> > 0.05), the α- AMS enzyme activity significantly decreased (<i>p</i> < 0.05). Under 2.5 bl/s water flow velocity, the intestinal structure of coral trout changed, and the number of goblet cells decreased. High-water flow velocities affect the physiological homeostasis and intestinal digestion of coral trout, resulting in a decrease in their growth performance, indicating that coral trout is more sensitive to high-water flow velocities. In actual RAS aquaculture, the flow rate should be controlled within 1 bl/s.https://www.mdpi.com/2077-1312/11/4/862<i>Plectropomus leopardus</i>water flow velocitygrowth performanceblood biochemistryintestinal digestibility |
| spellingShingle | Zhenjia Qian Jincheng Xu Andong Liu Jianjun Shan Chenglin Zhang Huang Liu Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) Journal of Marine Science and Engineering <i>Plectropomus leopardus</i> water flow velocity growth performance blood biochemistry intestinal digestibility |
| title | Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) |
| title_full | Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) |
| title_fullStr | Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) |
| title_full_unstemmed | Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) |
| title_short | Effects of Water Velocity on Growth, Physiology and Intestinal Structure of Coral Trout (<i>Plectropomus leopardus</i>) |
| title_sort | effects of water velocity on growth physiology and intestinal structure of coral trout i plectropomus leopardus i |
| topic | <i>Plectropomus leopardus</i> water flow velocity growth performance blood biochemistry intestinal digestibility |
| url | https://www.mdpi.com/2077-1312/11/4/862 |
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