Abstract

Preliminary laboratory studies, using an external tag (nylon suture with a heat formed barb), resulted in successful tag retention through molting at rates of 93.5% (75 molts) and 87.7% (89 molts) respectively. In 1986 the tag prototype, with the addition of a coded sleeve, was statisticly tested under laboratory and field conditions. Successful tag retention through 110lting was 89% (56 molts) in the laboratory and 68% (96 molts) in the field enclosure study. Tag retention over time was also examined. In 1984, 87.5% of the tagged animals had tags on day 43. In 1985, 70% had tags on day 82. In 1986, laboratory results show 73% had tags on day 100 and declined to 60% by day 191. Field enclosure results were estimated at 14% on day 100. The tags do not appear to affect growth in length or weight, molting, or mortality. Tag identification was examined throughout the 1986 field study. Of 108 tagged recaptures, 92% were identified to individuals and 43% of all tagged animals were recaptured at least once.

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