Growth, Recovery and Survival Rate of Artificial Seed of Abalone, Haliotis diversicolor diversicolor in Nakanogo, Hachijo Island, Tokyo.

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Artificial seed of abalone, <I>Haliotis diversicolor diversicolor</I>, was planted in Nakanogo, Hachijo Island, during 1982 to 1986, and recovered by capturing with fishing in one, two and three years after plantation, to investigate their growth, recovery and survival rate. The size of the planted seed was from 15.6 mm to 25.0 mm in average. The average shell lengths of recovered abalones at one, two and three years after plantation were 57.5-62.1, 65.8-72.1 and 73.6 mm, and body weights were estimated to be 26.7-32.4, 34.7-47.1 and 49.6 g, respectively. Growth increment was greater in smoller seed than larger ones. There was significant negative correlation (P < 0.01) between growh increment and planting size, ranging from 10 to 30 mm. The accumulative recovery rates ranged from 2.2 to 23.6 % until two to three years after plantation. The survival rates after one year of plantation ranged from 11.8 to 58.5 %, which were calculated from recovery number and catching rate estimated by DeLury's method.
日本水産増殖学会の論文