Effects of Salinity on Growth, Digestive Enzyme Activity, and Antioxidant Capacity of Spotbanded Scat (Selenotoca multifasciata) Juveniles

文献类型： 外文期刊

第一作者： Liu, Jianyi

作者： Liu, Jianyi;Ai, Tongxi;Yang, Jun;Shang, Meijuan;Jiang, Keji;Yin, Yane;Gao, Lei;Jiang, Wei;Zhao, Na;Ju, Jianfeng;Qin, Bo;Liu, Jianyi;Ai, Tongxi;Yang, Jun;Shang, Meijuan;Jiang, Keji;Ju, Jianfeng

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关键词： spotbanded scat (Selenotoca multifasciata); salinity; growth; digestive enzyme; antioxidant capacity

期刊名称：FISHES （ 影响因子：2.4； 五年影响因子：2.4 ）

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年卷期： 2024 年 9 卷 8 期

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收录情况： SCI

摘要： As a euryhaline fish species that inhabits estuarine and coastal regions, the spotbanded scat (Selenotoca multifasciata) experiences growth influences during its larval stage due to variations in salinity. Here, we evaluated salinity required by early-stage spotbanded scat juveniles to achieve the highest growth performance, digestive enzyme activity, survival, and antioxidant capacity. We reared spotbanded scat juveniles (all 0.50 +/- 0.05 g) in 0-35 parts per thousand salinity gradients for 50 days and recorded their survival rate every 10 days. After 50 experimental days, we measured morphological data, stomach and intestinal digestive enzyme activities, and liver antioxidant enzyme activities and malondialdehyde contents. In general, 5-15 parts per thousand salinity led to 100% survival. The 5 parts per thousand salinity group demonstrated the highest values for the following measures: final wet body weight; weight gain rate; specific growth rate; growth percentage; average daily gain; stomach amylase and lipase specific activities; and intestinal amylase, lipase, trypsin, and pepsin specific activities. However, stomach trypsin and pepsin activities did not demonstrate significant between-group differences (all p > 0.05). The 25 parts per thousand salinity group demonstrated the highest liver superoxide dismutase and glutathione peroxidase activities and malondialdehyde content. Finally, the 0 parts per thousand salinity group demonstrated the highest liver catalase activity. Thus, spotbanded scat juveniles demonstrate the highest survival rates, growth performance, and digestive enzyme activity at 5 parts per thousand salinity and the strongest oxidative stress responses at 25 parts per thousand salinity.

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