By Jacob M. Jaworski

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And Azam, K. (2004). Biological studies of the mud crab, Scylla serrata (Forskal) of the Sundarbans mangrove ecosystem in Khulna region of Bangladesh. Pakistan J. Biol. , 7(11): 1981-1987. Aggett, J. and Kriegman, M. R. (1988). The extent of formation of arsenic (III) in sediment interstitial waters and its release to hypolimnetic waters in lake Ohakuri. , 22(4): 407. Chaudhuri, A. B. and Choudhury, A. (1994). Mangrove of Sundarbans Vol. I: India (Zakir Hussain, M. and Acharya, G. ) IUCN, Bangkok, Thailand.

Serrata (x105 cells / ml) THC of S. 8* On being exposed to sublethal doses of arsenic, the population of hyalinocytes and granulocytes exhibited a steady decline in 1 ppm of sodium arsenite (Figure 2). The granulocytes showed a remarkable rise in count against 2 ppm of sodium arsenite up to 30 days (Figure 3). Exposure of the animals in 3 ppm for 4 days resulted a highest increase in distribution of hyalinocytes, 10 times more and an lowest decrease in semigranulocytes, 4 times than control (Figure 4).

24% respectively (Figure 2). Effect of Sublethal Concentration of Arsenic on Hemocyte Density in Edible Crab… 31 Figure 1. Alteration of total hemocyte count (THC) of adult S. serrata under exposure of 1, 2, 3 ppm of sodium arsenite for 1, 2, 3, 4, 7, 15 and 30 days. Data expressed as mean ± standard deviation. 001 (n = 5). b h h Figure 2. Alteration of differential hemocyte count (DHC) of S. serrata under exposure of 1 ppm of sodium arsenite for 1, 2, 3, 4, 7, 15, 30 days. Data expressed as percentage (n =5).

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