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November 28, 2015

Japan

Shrimp Farming at JIRCAS

 

The Japan International Research Center for Agricultural Sciences, or JIRCAS, is a national institute that works to develop technology for the agriculture, forestry and fisheries sectors.

 

One area the institute is currently involved in is shrimp farming.  Dr. Marcy Wilder, a senior research scientist at JIRCAS, is working on a range of areas related to shrimp farming, such as Vietnam’s freshwater prawn farming, the development and transfer of seed production technology, eye structure and function of the giant freshwater prawn (Macrobrachium rosenbergii), light perception capability of the whiteleg shrimp (Penaeus vannamei) and the reproductive mechanisms in M. rosenbergii and P. japonicus.

 

This work is all the more important because P. japonicus is a significant target of artificial seed production operations for the restocking of coastal areas, so female molting and reproduction must be suitably controlled under artificial conditions in order to guarantee a sustainable means of artificial seed production.

 

In the area of aquaculture technology, Dr. Wilder is currently involved in the development of land-based recirculating systems.  In 2004, JIRCAS formed a research consortium with International Mariculture Technology Engineering, Inc. (IMTE, an aquaculture engineering firm), the National Research Institute of Aquaculture of Japan’s Fisheries Research Agency and aquaculture feed company Higashimaru, Co., Ltd., to start an integrated research project into land-based recirculating aquaculture systems for the domestic production of P. vannamei.

 

Some key areas of the project include the collection of data on osmoregulation, oxygen demand and ammonia excretion levels of P. vannamei under recirculating conditions, and the optimization of shrimp growth based on the control of water temperature, salinity and flow rates.

 

The project has found that in hard water with low salinity, shrimp grow just as much as, if not more than, full-strength seawater, leading to the development and application of low-salinity rearing methods to commercial large-scale production at IMTE’s shrimp production facility in Myoko City, Niigata Prefecture, near the well-known Mt. Myoko.

 

The facility operates on a commercial basis and is capable of producing 40 metric tons of shrimp a year, marketed under the trade name “Myoko Snow Shrimp™.”

 

Information: Dr. Marcy Wilder, The Japan International Research Center for Agricultural Sciences (email marwil@jircas.affrc.go.jp).

 

Source: The FishSite.  JIRCAS: Japan’s Fisheries Technology Makes its Mark.  Bonnie Waycott.  November  27, 2015.

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