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March 26, 2014

Malaysia

Daniel Gruenberg—A Pond Trial with Copepods

 

To demonstrate the benefits of copepods in shrimp ponds, Daniel Gruenberg, a shrimp farming consultant in Thailand, said he selected the worst possible pond he could find in Malaysia, a pond with no reservoir, a pond that only had access to water exchange two days per month and a pond that previously failed six times with confirmed EMS and WSSV.  He used that pond as a “worst case” example of what copepods could do.

 

The only change he made was that he selected fertilizers to produce a dense diatom/copepod bloom.  The pond was harvested with an average shrimp weight of six grams after 72 days.   The average weight was low due to many slow growing animals, but there were many animals over ten grams.  The FCR was 1.5.   Laboratory tests confirmed the presence of EMS in the pond.

 

Gruenberg said he was not claiming that copepods will solve the EMS issue, but added the combination of good genetics and good nutrition will go a long way to solving the problem.

 

Source: The Shrimp List (a mailing list for shrimp farmers).  Subject: SPF=High Growth=High Mortality=Low Productivity/Copepods Improve Survival.  March 21, 2014.

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