No abstract

No abstract

The present study was conducted to evaluate the effects of salinity levels (40, 35, 30, 25, 20, 15, 10 and 5‰) on haemolymph parameters and survival of adult shrimp Litopenaeus vannamei. Shrimps were distributed in fiberglass tanks containing water with 40‰ salinity then salinity was gradually declined during 7 days at rate of 5‰ a day by adding clean fresh water. Haemolymph of three shrimps was daily sampled from each treatment in triplicates. The haemolymph parameters including total haemocyte count (THC), total plasma protein (TPP), differential haemocyte count (DHC) were measured. Significant differences were found between treatments in terms of THC values (p<0.05). The highest THC were observed in shrimps exposed to salinities of 25 and 5‰ (p>0.05) versus the lowest THC was measured in 35‰ one.