RFID PIT tag implant test for the individual broodstock identification of shrimp Litopenaeus vannamei

Trigene and Nova Aqua tested Biomark´s RFID PIT tags to individually tag shrimp broodstock in order to evaluate the viability of this practical and secure method of identification in the shrimp industry.

Biomark equipment used on the test

HPT 8 mm RFID PIT tags

HPR Lite waterproof/bluetooth reader

Manual injectors/needles

Biomark Tag Manager v.3.10.3 Software

The test were done on the following companies: Potiporã (Team: Roseli Pimentel, Joyce and Daniel Lanza (UFRN)) and Maris/CELM (Team: Hudson Lucena, Jorge and Carlos).

Animals with weights of 30 to 45 g were tested. The PIT tag was inserted at a approximate 30 degree angle in the third segment of the shrimp´s tail. Some were inserted shallower to facilitate visualization. Two people were required for the insertion, one to hold the animal and other to insert the tag with the manual injector.

Tests results and Observations

  • Despite the relatively large diameter of the needle, that produced a burst of hemolymph at insertion, all tagged shrimp survived after 15 days of the insertion of the tag.
  • On the day following the application of the tag, a visible clot of hemolymph was already visible at the insertion point and the shrimp were eating normally. Reproduction occurred normally on the two weeks after insertion.
  • No animals with erratic swimming behavior were noticed the following day after the insertion.
  • All animals retained their tags following the insertion.

Test conclusions and impressions

Despite the small numbers of animals tested (10), we conclude that the 8 mm PIT tag is a viable alternative for tagging broodstock shrimp. The more common 12 mm tag would represent a significant larger trauma to the animals.

Other impressions

  • To minimize the transmission of diseases between the animals it is recommended the use of preloaded tags in singly use needles.
  • With more experience, use of anesthetics and a tagging gun one person could probably handle the tagging of shrimp.
  • We believe that the RFID technology could play a significant role in shrimp hatcheries, facilitating the control and traceability of the broodstock.

Thank you note

We Thank Potiporã and Maris/CELM for the use of their facilities, broodstock and the support of their technical teams in this test.

plugins premium WordPress