|
|
|
| Effects of Hypoxia on Physiological Status of Siberian Sturgeon Acipenser baeri Juveniles |
| WANG Xiaowen,ZHU Hua,HU Hongxia,MA Guoqing |
|
|
|
|
Abstract Effects of acute hypoxia stress and drastic changes in dissolved oxygen levels from 18 .5 mg/L to 2 .8 mg/L then recovery to 7 mg/L on blood parameters ,antioxidant and metabolism were studied in Sibe‐rian sturgeon Acipenser baeri with body weight of (19 .46 ± 4 .9) g .Erythrocyte count ,total hemoglobin concentration ,activities of antioxidant enzymes in livers and muscle ,and activities of Na+ /K+‐A T Pase in gills were measured in the experiment .The results showed that erythrocytic number was elevated ,while hemoglobin concentration and pH of whole blood under hypoxia stress were lower than those in the control group .Hypoxia stress also depressed the activities of superoxide dismutase (SOD) ,catalase (CAT ) and alkaline phosphatase (AKP) in juvenile sturgeon .Nevertheless ,there were no obvious changes in the ac‐tivities of Na+ /K+‐A T Pase in gills of Siberian sturgeon juveniles .Based on the results above ,it is sugges‐ted that hypoxia stress could easily lead to the enhancement of erythrocyte amount ,also reduce the activi‐ties of antioxidant and metabolism enzymes in livers or muscle of the juveniles .However ,sturgeon juven‐iles could not achieve energy adjustment in gills itself within a short time .
|
|
Received: 25 May 2016
|
|
|
|
|
|
|
