© 1987 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
Field use of an injected ferromagnetic tag on the snow crab (Chionoecetes opilio O. Fab.)
Institut Maurice-Lamontagne 850 Route de la Mer C.P. 1000, Mont-Joli, Québec, Canada G5H 3Z4
This paper describes a crab tagging method with a potential for retention during ecdysis. Miniature ferromagnetic tags are injected mechanically into the dactylus of crab legs and are recovered in commercial landings using a magnetic detector.The method was tested in the field and shown to be practical for the rapid tagging of large numbers of crabs at sea. A statistically valid estimate of stock size was calculated.