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October 12, 2013


Comments from Daniel Gruenberg on EMS


Daniel Gruenberg ( During a panel at GOAL 2013 in Paris, France, speakers said the reaction of giant tiger shrimp (Penaeus monodon) to early mortality syndrome (EMS) may offer some insight into the nature of the disease.


Noriaki Akasawa, managing director of the Malaysian shrimp farm Agrobest, said black tiger shrimp were never infected by EMS, even if they were raised in a pond with infected P. vannamei.  Robins McIntosh, a senior executive at Charoen Pokphand Foods in Thailand, modified Akasawa’s statement a bit, saying tiger shrimp don’t die in ponds, but “if you feed them the bacteria, they do die.”  If we can figure out why that happens, we will probably learn something new about EMS, said McIntosh.  Another clue, he said, involves tilapia.  The mortality of shrimp from EMS declines if you have tilapia in the water.  The EMS bacteria has also been found to be highly sensitive to salinity, and does not survive well in high salinity areas, he said.


Gruenberg says, “For the record, I do not agree with much of what was discussed about EMS at GOAL 2013.  There is no effect from pH on EMS, and high salinity does not affect EMS.”


Source: The Shrimp List (a mailing list for shrimp farmers).  Subject: Reports on EMS.  Daniel Gruenberg.  October 12, 2013.


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