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Study on effect of salinity level of water on electrocardiogram and some of blood serum minerals in grass carp, Ctenopharyngodon idella

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Author(s): Ala Enayati | Rahim Peyghan | Ahmad Ali Papahn | Gholam-Hosain Khadjeh

Journal: Veterinary Research Forum
ISSN 2008-8140

Volume: 4;
Issue: 1;
Start page: 49;
Date: 2013;
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Keywords: Electrocardiogram | Grass carp | Minerals | Salinity

ABSTRACT
In this study the effects of salinityon the electrocardiogram and some of blood serumminerals in grass carp were investigated. For this purpose, grass carp were exposed toconcentrations of 4, 8 and 12 g L-1salinities and electrocardiogram of all fish was recorded.Blood samples were also collected from all fish and serum minerals were measured. Ourresults indicated that mineral level in the studied groups was significantly different. Theaverage of heart rate per minute in control group and 4, 8 and 12 g L-1were 10.15, 10.06,12.17 and 7.79 beat per min, respectively. In 8 g L-1group only the average of QT and STsegment decreased significantly in comparison with the control group (p< 0.05). In 12 g L-1group the average of heart rate per minute decreased significantly in comparison with8 g L-1group (p< 0.05) and no difference in the average of heart rate per minute was observed in allgroups. The average of RR, PT and ST segment in the 12 g L-1group were significantly morethan the other groups (p< 0.05).The results showed that water salinity level increased toconcentrations above 8 g L-1can have significant effect on the electrocardiogram and minerallevel of blood serum in grass carp. These changes are probably can be considered as one ofthe causes of impairment of health and death of this fish species in the salinitiesmore than8 g L-1due to ion imbalance and cardiovascular disorders.
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