PDF
Full
Outline
In recent years, fishmeal supply has surpassed market demand, leading to consistently high prices. To alleviate market pressure and reduce farming costs, it is crucial to investigate economical plant protein alternatives in feed. In this study, we examined the feasibility of incorporating mixed plant proteins into diets for juvenile Chinese longsnout catfish and determined appropriate inclusion levels. Six isonitrogenous and isolipidic diets were formulated using a mixed plant protein source (fermented soybean meal to rapeseed meal ratio of 4:1) to replace fishmeal in a basal diet at levels of 0%, 10%, 20%, 30%, 40%, and 50% (V0, V10, V20, V30, V40, and V50, respectively). Juvenile catfish were fed these diets for 8 weeks, after which growth performance, serum biochemistry, liver antioxidant activity, lipid content, and liver morphology were assessed. The results showed that substituting 50% of dietary protein with vegetable protein sources significantly reduced (P<0.05) the specific growth rate (SGR), whereas the V50 group exhibited a significantly higher feed conversion ratio that of other groups (P<0.05). Blood total cholesterol initially decreased and subsequently increased, reaching its lowest level in V10 (P<0.05). Similarly, both aspartate aminotransferase and alanine aminotransferase displayed decreasing-then-increasing trends, with lowest levels in V30 and V20, respectively (P<0.05). Liver malondialdehyde showed a decreasing-then-increasing trend, with significantly lower values in V10 and V20 groups than those of other groups (P<0.05). Total antioxidant capacity demonstrated an increasing-then-decreasing pattern, peaking at V10. Catalase activity showed a decreasing trend, with the V40 group showing significantly higher activity than that of the V50 group but lower than that of other groups (P<0.05). Histological analysis revealed progressive hepatic steatosis beginning at V30, accompanied by blurred hepatocyte membrane boundaries. Lipid droplet quantity exhibited a decreasing-then-increasing trend, reaching its lowest level at V20 (P<0.05). Under experimental conditions, moderate mixed vegetable protein supplementation improved juvenile Chinese longsnout catfish liver health. SGR was achieved with 37.47% fishmeal replacement by mixed vegetable protein; however, based on liver health indicators, a lower replacement level may be warranted.
PDF
9
3
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
