Effects of Cryptocaryon irritans infection on the survival, feeding, respiratory rate and ionic regulation of the marbled rockfish Sebastiscus marmoratus

文献类型： 外文期刊

第一作者： Yin, Fei

作者： Yin, Fei;Sun, Peng;Gao, Quanxin;Shi, Zhaohong;Peng, Shiming;Gong, Qiyang;Li, Yanwei;Li, Anxing;Dan, Xueming

作者机构：

关键词： respiratory rate;food intake;survival;Cryptocaryon irritans;Sebastiscus marmoratus;ion content;Na+/K+-ATPase activity

期刊名称：PARASITOLOGY （ 影响因子：3.234； 五年影响因子：3.118 ）

ISSN： 0031-1820

年卷期： 2014 年 141 卷 2 期

页码：

收录情况： SCI

摘要： To clarify the effects of a Cryptocaryon irritans infection on the physiological functions of the marbled rockfish Sebastiscus marmoratus, this study utilized C. irritans at concentrations of 2500; 5000; 7500; 10000; 20000; and 30000 theronts/fish to infect marbled rockfish weighing 45 +/- 3g. The survival rate, food intake, respiratory rate, serum ion concentrations and gill Na+/K+-ATPase activity were determined. With the increase of the infection concentration and the passage of time, the survival rate of the rockfish gradually decreased. The groups infected with more than 5000 theronts/fish had stopped feeding within 4 days. The respiratory rates of the fish in the groups infected with 2500 and 5000 theronts/fish initially increased and then decreased. In contrast, the respiratory rate of the fish in the groups infected with more than 7500 theronts/fish was elevated to levels significantly higher than the control group after 12h. The Na+/K+-ATPase activity and serum Na+ and Cl- concentrations increased with increasing infection concentration. In conclusion, the physiological functions of the fish infected with low concentrations of C. irritans can be effectively restored, whereas a high concentration infection induced severe stress. The declined food intake and accelerated respiratory rate could be useful for an early warning system as important indicators.

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