Serum osmolality and ions,and gill Na^(+)/K^(+)-ATPase of spottedtail goby Synechogobius ommaturus(R.)in response to acute salinity changes  

作　　者：Chun Shui Yonghai Shi Xueming Hua Zhonghua Zhang Haiming Zhang Genhai Lu Yongde Xie 

机构地区：[1]Key Laboratory of Freshwater Fishery Germplasm Resources,Ministry of Agriculture,Shanghai Ocean University,Shanghai 201306,China [2]Shanghai Fisheries Research Institute,Shanghai 200433,China

出　　处：《Aquaculture and Fisheries》2018年第2期79-83,共5页渔业学报（英文）

基　　金：Financial support was provided by Agriculture Commission of Shanghai(2011/1-4);Shanghai breed industry development project(2015/17).

摘　　要：This study was carried out to determine the effects of abrupt salinity change on osmoregulatory ability of the spottedtail goby Synechogobius ommaturus.720 juvenile fish(65.3±11.8 g)were transferred to 200 L tanks(with 40 juveniles in each tank),in which salinities were abruptly changed from 10 to 20,30,40,50 and freshwater.Survival rate,serum osmolality,electrolytes(Na^(+),Cl^(-),and K^(+))and gill Na^(+)/K^(+)-ATPase(NKA)activity were assessed successively in 528 h.Results showed serum osmolality,ion concentrations and gill Na^(+)/K^(+)-ATPase activity increased significantly when fish were transferred to salinity 40 and 50 and all fish in these groups died by the end of the experiment.Serum osmolality,Na^(+),Cl^(-)and K^(+)in fish transferred to a salinity of 20,30 and freshwater were not affected and no mortality was detected.Compared with the control group,a significantly decrease of NKA activity happened in the freshwater group,but the activity in 20 and 30 groups was not affected significantly.The results indicated that S.ommaturus could adapt rapidly and maintain homeostasis in a wide range of salinities(from freshwater to salinity 30)and this species may be suitable for aquaculture in estuarine and coastal areas where rapid salinity fluctuations commonly occur.

关 键 词：OSMOLALITY GILL Na^(+)/K^(+)-ATPase Synechogobius ommaturus 

分 类 号：P73[天文地球—海洋科学]