Effects of the tagging methods on the growth and survival of abalone juvenile, Haliotis discus hannai

摘要

This study was carried out 10 investigate the optimum tagging method of the abalone juvenile, Haliotis discus hannai in indoor culture system from May 2000 to January 2001. Tagging methods were shell drilling, copper-wire tagging, bolt-nut tagging at the respiratory pore and nut gluing on the shell. The attachment rates of the tag on the shell showed high in the 2- and 3 cm bolt-nut tagged groups, about over 89.5 percent, whereas shell drilling groups on the shell were about 18.5 percent. The internal coating rates tagged with bolt-nut in the 2-, 3 cm abalone groups were over 96.6 percent, while those tagged with copper wire were less than 17.1 percent. Growths in the all marked and tagged experimental groups comparing with control groups were notsignificantly different (p>0.05). Survivals in all tagging groups except shell drilling and nut gluing groups in the 5 cm abalone were over 95 percent. Accordingly, all juvenile groups were not affected by the tagging methods in terms of the growth andsurvival on the abalones. Based on these results, the micro bolt-nut tagging was the most effective method in abalone.