Isely, J.J., D.G. Trested and T.B. Grabowski. 2004. Tag retention and survivorship of hatchery rainbow trout marked with large format VIalpha tags. North American Journal of Aquaculture 66:73-74.
Large-format visible implant alphanumeric (VIalpha) tags were implanted into 15,400 rainbow trout Oncorhynchus mykiss. Tag retention after 25 d was 82.6%, and survivorship was 92.8%. The results of this study compare favorably with those of similar studies on other species and suggest that large-format VIalpha tags are an appropriate choice for studies requiring the individual identification of larger rainbow trout.