The effects of hairtail protein hydrolysate–Fe2+ complexes on growth and non-specific immune response of red swamp crayfish (Procambarus clarkii)
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- 作者：Bin Zhang ; Zhou-rong Shi ; Xiao-ling Wang ; Shang-gui Deng
- 刊名：Aquaculture International
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：24
- 期：4
- 页码：1039-1048
- 全文大小：362 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Hydrobiology - 出版者：Springer Netherlands
- ISSN：1573-143X
- 卷排序：24
文摘
The experiment was conducted to investigate the effects of prepared hairtail protein hydrolysate–Fe2+ (PH–Fe2+) complexes on growth and non-specific immune responses of crayfish (Procambarus clarkii). The diets with five different levels of PH–Fe2+ (200, 400, 600, 800, and 1000 mg/kg) were fed to crayfish for 60 days. The results indicated that the survival rate, weight gain percentage, specific growth rate, and muscle index of crayfish with 400–1000 mg/kg of PH–Fe2+ feeding were significantly higher, 9.94–10.10, 8.55–8.72, 0.24–0.29 %/day, and 2.39–3.05 %, respectively, than the control values after 60 days of feeding. Additionally, after 30 days of feeding, 200–400 mg/kg of PH–Fe2+ showed no significant (P > 0.05) improvement effect on activities of superoxide dismutase (SOD), phenoloxidase (PO), lysozyme (LSZ), and acid phosphatase (ACP) in serum or hepatopancreas of crayfish. However, significant improvement effects were observed in 800–1000 mg/kg groups. After 60 days of feeding, 400–600 mg/kg of PH–Fe2+ significantly (P < 0.05) improved the activity of SOD and LSZ, but did not affect the activity of PO and ACP significantly (P > 0.05). Moreover, the activities of SOD, PO, LSZ, and ACP in serum and hepatopancreas were all significantly enhanced upon treatment with 800–1000 mg/kg of PH–Fe2+. For these reasons, PH–Fe2+ can be recommended as a supplement in crayfish feed to increase the growth and immunity.KeywordsProcambarus clarkiiProtein hydrolysate–Fe2+ (PH–Fe2+)Superoxide dismutase (SOD)Phenoloxidase (PO)Lysozyme (LSZ)Acid phosphatase (ACP)