INFESTATION OF Probopyrus sp . ON Macrobrachium lanchesteri FROM CHALOK RIVER AND NYATOH RIVER , TERENGGANU , MALAYSIA

The bopyrid isopod Probopyrus sp. is a common ectoparasite of Macrobrachium lanchesteri from Chalok and Nyatoh rivers. A total of 1263 prawns were examined and only 38 prawns were infested by Probopyrus sp. There was no infestation of more than one bopyrid. The infestation was considered low (3.0%) from both rivers. However, prawn from Nyatoh river showed higher infestation (4.61%) compared to Chalok river, 1.42%. The colour of cyst showed the stages of the eggs maturity such as light yellow, yellow, orange and dark orange. This present study showed the status of the Probopyrus sp. on M. lanchesteri from both rivers, Chalok and Nyatoh river in Setiu.