The Biomark custom tagging trailer
Tagging is conducted in Biomark’s state-of-the-art self-contained custom tagging trailer. The tagging trailer is delivered and set up near the raceway or fish holding tank. AC power is usually provided by the hatchery power source (50 amps of 220 VAC). However, generator power can be provided. Water is normally pumped from a head box or directly from the raceway.
Water temperature is recorded as it enters the tagging trailer. Water temperature within the holding tank will be at ambient temperature and the re-circulated anesthetic water inside the tagging trailer is maintained to be within 0.5°C of the ambient water temperature. Fish are transported to the tagging trailer from the hatchery raceways in water-filled buckets and placed in a 500 gal freshwater holding tank inside the tagging trailer.
Coho tagging using the HPT12 PLT & MK25
Fish smaller than 60 mm fork length (FL) and fish displaying obvious signs of disease or injury are culled prior to tagging. Fish are also culled if they possess a tagging wound, but no tag is detected, due to the chance that a weak or damaged tag may have been implanted into the fish, which could interfere with a second implanted tag.
Tagging at Chief Joseph Dam
Biomark staff pumping water from
the raceway to the tagging trailer
Fish are tagged using the techniques described in Prentice et al. (1990). This procedure involves piercing the body cavity at or near the ventral midline of a fish and inserting an RFID tag into the body cavity. Each fish is tagged at one of the four PIT-tag data collection stations where tag code, fish length, fish condition, weight (if required), and raceway number will be stored using PITTAG3 software (Pacific States Marine Fisheries Commission). Fish are then transferred from the tagging trailer to the holding raceway via a 3-inch diameter pipe.
705 S. 8th Street, Boise, Idaho 83702
Direct: 1 (208) 275-0011
Mon - Fri: 8am to 5pm
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