摘要:
The effects of water temperature and salinity on metamorphosis, post-larval survival, and growth of Haliotis discus hannai Ino were explored in this study. In the temperature experiment, the animals were reared at eight water temperatures of 14 , 16, 18, 20, 22, 24 , 26, and 28°C. The results illustrated that the water temperature considerably influenced the metamorphosis rate, post-larval survival, and growth of H. discus hannai Ino (P 0.05). At 22~40, the metamorphosis rate first increased and subsequently decreased, reaching its peak at 32 with a value of 79.23%. The lower salinity limit of metamorphosis was 22, at which only 2.21% of individuals could complete metamorphosis. At 26~40, the post-larval survival rate was above 85%. Within this range, the growth rate first increased and subsequently decreased. Maximum growth rates of shell length and shell width within 6 days after casting were obtained at 34, with values of 32.03 and 25.20μm/d, respectively. The growth rates of shell length and shell width within 15 days after casting reached their peak at 34 and 32, respectively, with values of 43.03 and 39.00μm/d.%采用室内受控方法研究了水温(14、16、18、20、22、24、26和28°C)和盐度(22、24、26、28、30、32、34、36、38和40)对皱纹盘鲍变态及变态幼体生长存活的影响.结果表明,水温对变态率、变态幼体存活率和生长率的影响极显著(P0.05).22~40盐度条件下,幼体变态率先升高后降低,于32达最大值,为79.23%;变态的盐度下限为22,该盐度下仅有2.21%的个体能够完成变态.26~40条件下,变态幼体存活率均高达85%以上;随着盐度的升高,变态幼体生长率先升高后降低.投苗6 d内壳长、壳宽生长率均于34达最大值,分别为32.03μm/d和25.20μm/d;投苗15 d内壳长、壳宽生长率分别于34和32达最大值,为43.03μm/d和39.00μm/d.