Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal
An 8-week feeding trial was conducted to investigate the effects of dietary protein levels on growth performance, feed utilization, and energy retention of juvenile dotted gizzard shad <i>Konosirus punctatus</i> based on the variation of fish meal. Fish meal was used as the sole protein...
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MDPI AG
2023-02-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/13/5/788 |
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| author | Tao Liu Xinzhi Weng Jiteng Wang Tao Han Yuebin Wang Xuejun Chai |
| author_facet | Tao Liu Xinzhi Weng Jiteng Wang Tao Han Yuebin Wang Xuejun Chai |
| author_sort | Tao Liu |
| collection | DOAJ |
| description | An 8-week feeding trial was conducted to investigate the effects of dietary protein levels on growth performance, feed utilization, and energy retention of juvenile dotted gizzard shad <i>Konosirus punctatus</i> based on the variation of fish meal. Fish meal was used as the sole protein source; five semi-purified diets were formulated with varying crude protein (CP) levels of 22.52%, 28.69%, 34.85%, 38.84%, 45.78% (CP1-CP5 diets). A total of 300 uniform juveniles with initial body weight 3.61 ± 0.20 g fish<sup>−1</sup> were randomly divided into five groups with three replicates in each group. The results showed that different CP levels did not significantly affect the survival of juvenile <i>K. punctatus</i> (<i>p</i> > 0.05). The values of weight gain (WG) and specific growth ratio (SGR) showed a general enhancing trend and then weakened with increasing dietary CP levels (<i>p</i> > 0.05). Feed utilization also improved with increasing dietary CP levels (<i>p</i> > 0.05), and the optimal feed conversion ratio (FCR) value was found in fish fed the diet with CP3 (<i>p</i> > 0.05). The rise of dietary CP from 22.52% to 45.78% enhanced the daily feed intake (DFI) and protein efficiency ratio (PER) values of <i>K. punctatus</i> (<i>p</i> < 0.05). With the increase of dietary CP levels, daily nitrogen intake (DNI), energy retention (ER), and lipid retention (LR) elevated, while retention (NR), daily energy intake (DEI), and daily lipid intake (DLI) reduced (<i>p</i> < 0.05). No statistical differences in the content of water, crude protein, and crude lipid were observed among different treatments (<i>p</i> > 0.05). The activity of lipase in CP3 and CP4 diets was significantly higher than that of the CP1 diet (<i>p</i> < 0.05). Fish fed CP2 and CP3 diets had significantly higher amylase activity than that of the CP5 diet (<i>p</i> < 0.05). The levels of alanine aminotransferase (GPT) first enhanced and then decreased as dietary CP levels raised. The second-order polynomial regression model analysis of the WG and FCR indicated that the optimal dietary protein level for <i>K. punctatus</i> is about 31.75–33.82% based on the variation of fish meal. |
| first_indexed | 2024-03-11T07:33:21Z |
| format | Article |
| id | doaj.art-d5621dd2487a45d791d535d6f389c934 |
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| last_indexed | 2024-03-11T07:33:21Z |
| publishDate | 2023-02-01 |
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| spelling | doaj.art-d5621dd2487a45d791d535d6f389c9342023-11-17T07:12:25ZengMDPI AGAnimals2076-26152023-02-0113578810.3390/ani13050788Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish MealTao Liu0Xinzhi Weng1Jiteng Wang2Tao Han3Yuebin Wang4Xuejun Chai5Department of Aquaculture, School of Fisheries of Zhejiang, Ocean University, Zhoushan 316022, ChinaAquatic Technology Extension Station of Taizhou, Taizhou 318000, ChinaDepartment of Aquaculture, School of Fisheries of Zhejiang, Ocean University, Zhoushan 316022, ChinaDepartment of Aquaculture, School of Fisheries of Zhejiang, Ocean University, Zhoushan 316022, ChinaZhejiang Marine Fisheries Research Institute, Zhoushan 316021, ChinaZhejiang Marine Fisheries Research Institute, Zhoushan 316021, ChinaAn 8-week feeding trial was conducted to investigate the effects of dietary protein levels on growth performance, feed utilization, and energy retention of juvenile dotted gizzard shad <i>Konosirus punctatus</i> based on the variation of fish meal. Fish meal was used as the sole protein source; five semi-purified diets were formulated with varying crude protein (CP) levels of 22.52%, 28.69%, 34.85%, 38.84%, 45.78% (CP1-CP5 diets). A total of 300 uniform juveniles with initial body weight 3.61 ± 0.20 g fish<sup>−1</sup> were randomly divided into five groups with three replicates in each group. The results showed that different CP levels did not significantly affect the survival of juvenile <i>K. punctatus</i> (<i>p</i> > 0.05). The values of weight gain (WG) and specific growth ratio (SGR) showed a general enhancing trend and then weakened with increasing dietary CP levels (<i>p</i> > 0.05). Feed utilization also improved with increasing dietary CP levels (<i>p</i> > 0.05), and the optimal feed conversion ratio (FCR) value was found in fish fed the diet with CP3 (<i>p</i> > 0.05). The rise of dietary CP from 22.52% to 45.78% enhanced the daily feed intake (DFI) and protein efficiency ratio (PER) values of <i>K. punctatus</i> (<i>p</i> < 0.05). With the increase of dietary CP levels, daily nitrogen intake (DNI), energy retention (ER), and lipid retention (LR) elevated, while retention (NR), daily energy intake (DEI), and daily lipid intake (DLI) reduced (<i>p</i> < 0.05). No statistical differences in the content of water, crude protein, and crude lipid were observed among different treatments (<i>p</i> > 0.05). The activity of lipase in CP3 and CP4 diets was significantly higher than that of the CP1 diet (<i>p</i> < 0.05). Fish fed CP2 and CP3 diets had significantly higher amylase activity than that of the CP5 diet (<i>p</i> < 0.05). The levels of alanine aminotransferase (GPT) first enhanced and then decreased as dietary CP levels raised. The second-order polynomial regression model analysis of the WG and FCR indicated that the optimal dietary protein level for <i>K. punctatus</i> is about 31.75–33.82% based on the variation of fish meal.https://www.mdpi.com/2076-2615/13/5/788<i>Konosirus punctatus</i>growthfeed utilizationbody compositionenergy retentiondietary protein levels |
| spellingShingle | Tao Liu Xinzhi Weng Jiteng Wang Tao Han Yuebin Wang Xuejun Chai Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal Animals <i>Konosirus punctatus</i> growth feed utilization body composition energy retention dietary protein levels |
| title | Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal |
| title_full | Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal |
| title_fullStr | Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal |
| title_full_unstemmed | Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal |
| title_short | Dietary Protein Requirement of Juvenile Dotted Gizzard Shad <i>Konosirus punctatus</i> Based on the Variation of Fish Meal |
| title_sort | dietary protein requirement of juvenile dotted gizzard shad i konosirus punctatus i based on the variation of fish meal |
| topic | <i>Konosirus punctatus</i> growth feed utilization body composition energy retention dietary protein levels |
| url | https://www.mdpi.com/2076-2615/13/5/788 |
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