Effects of dietary fish meal replacement with protein mixtures on growth performance, biochemical composition, and physiological metabolism of juvenile swimming crab, Portunus trituberculatus

A feeding trial was conducted to investigate the effects of different levels (0%, 16.67%, 33.33%, 50%, and 66.67%) of fish meal replacement by protein mixtures on the growth, body composition, and physiological metabolism of juvenile swimming crabs, Portunus trituberculatus . The results showed that...

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Bibliographic Details
Published in:Aquaculture international 2020-08, Vol.28 (4), p.1531-1545
Main Authors: Sun, Yunfei, Zhu, Shaicheng, Long, Xiaowen, Wu, Xugan, Cheng, Yongxu
Format: Article
Language:English
Subjects:
Biochemical composition
Biomedical and Life Sciences
Body weight
Crustaceans
Decapoda
Diet
Enzymatic activity
Enzyme activity
Feeding experiments
Fish
Fishmeal
Freshwater & Marine Ecology
Growth rate
Hepatopancreas
Life Sciences
Marine crustaceans
Metabolism
Physiology
Portunus trituberculatus
Proteins
Replacement level
Serum
Swimming
Zoology
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Summary:A feeding trial was conducted to investigate the effects of different levels (0%, 16.67%, 33.33%, 50%, and 66.67%) of fish meal replacement by protein mixtures on the growth, body composition, and physiological metabolism of juvenile swimming crabs, Portunus trituberculatus . The results showed that the final body weight (FBW), weight gain rate (WGR), specific growth rate (SGR), intermolt duration (ID), and hepatosomatic index (HSI) initially increased and then decreased with increasing dietary fish meal replacement levels, and the highest FBW, WGR, and SGR values were found in crabs fed Diet 3. The crude protein content in the body significantly decreased, whereas the moisture and ash contents increased significantly with increasing fish meal replacement levels. The digestive enzyme activity of crabs was significantly affected by different levels of fish meal replacement with protein mixtures. The highest glutamic-oxaloacetic transaminase (GOT) and glutamic-pyruvic transaminase (GPT) levels in the hepatopancreas were detected in crabs fed Diet 5. The serum superoxide dismutase (SOD) activity increased significantly with increasing fish meal replacement levels. In conclusion, the results of this study indicated that the appropriate dietary fish meal replacement level is approximately 33% with no significant negative effects on the growth performance of juvenile P. trituberculatus .
ISSN:0967-6120
1573-143X
DOI:10.1007/s10499-020-00541-0