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August 10, 2015


Tianjin Intra Technologies—Shrimp Hatchery Feeds


Tianjin Intra Technologies was established in 1998 by several specialists and experts in hatchery feeds.  The company is situated in Tianjin, near Bohai Bay, the center of China’ rotifer, Artemia and bloodworm farming industries.  It specialized in frozen, freeze-dried and sun-dried feeds—Artemia biomass, rotifers, bloodworms, copepods and many others—for the larval stages of fish, crabs and shrimp, selling them in fresh and frozen packs of various sizes.


Its products have been exported to Ecuador, the USA, Japan, Indonesia, Malaysia, Singapore, Australia, New Zealand, Germany, the Netherlands, France, Spain, the United Kingdom and other countries.


In 2002, it began harvesting copepods from rivers and lakes and freezing them in one-kilo flatpacks and exporting them to Japan as larvae feeds for marine fish, mainly red sea bream and halibut.


Following the publication of a scientific paper claiming that natural copepods were superior to enriched Artemia nauplii as a feed for halibut larvae, Chinese shrimp hatcheries began using frozen copepods to supplement Artemia in shrimp larval diets—with very good results.


After starting larval shrimp feeding with Artemia, frozen copepods can be used as a supplement to the Artemia from the zoea-3 stage up to and through the PL stage.  Zoea and mysis larvae require small copepods (500-800 um) and PLs require larger copepods (700-1300 um).


The copepods are harvested from rivers and lakes in early spring, and quickly transported to processing plants.  Fresh raw materials are washed and frozen at -35ºC for 12 hours and stocked at -18ºC till shipment.  3 kilos of frozen copepods can be used to replace 1 kg of Artemia cysts.  Before shipment, the frozen copepods are irradiated with gamma rays to kill all possible pathogens, so biosecurity is guaranteed.  Frozen copepods are available at $5 a kilo, FOB China.


Tianjin Intra Technologies also markets frozen polychaetes (Neanthes japonica), harvested from China’s Bohai Bay in November,for feeding shrimp broodstock.  Live polychaetes are better than frozen ones in shrimp maturation diets, but live polychaetes have a much higher price than frozen polychaetes.  Shrimp hatcheries use 50 percent live polychaetes and 50 percent frozen polychaetes to feed shrimp broodstock and get the same quality and quantity of shrimp eggs with lower production costs.


Information: Dr. Liu Fengqi, CEO, Intra Technologies Co., Ltd., Sanjintuo Village, Yingcheng Town, Hangu District, Tianjin, China (phone +86-22-2369-1856, fax +86-22-2366-0807, emails and, webpage,-ltd.html).


Sources: 1. Hatchery Feed Magazine (an annual online magazine in PDF format).  download your free copy.   Information: Suzi Fraser Dominy (   Natural Copepods Seen as “Superior”.   2015.  2. Tianjin Intra Technologies’ Webpage.  Website Visit on August 9, 2015.

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