The effects of different monospecific benthic diatoms on larval settlement, metamorphosis, survival, and growth of Haliotis asinina Linnaeus in the South China Sea
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- 作者：Jing jing Ding ; Bo Huang ; Ya qiang Hu ; Xiao bing Wang
- 关键词：Diatoms ; Haliotis asinina ; Metamorphosis ; Post ; larvae ; Settlement ; Survival
- 刊名：Aquaculture International
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：25
- 期：1
- 页码：367-377
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Freshwater & Marine Ecology; Zoology;
- 出版者：Springer International Publishing
- ISSN：1573-143X
- 卷排序：25
文摘
Settlement, metamorphosis, survival, and growth of Haliotis asinina larvae exposed to settlement surfaces coated with biofilms of four local diatom species (Navicula seminulum,Navicula parva,Nitzschia alexandria, Amphora coffeaeformis) were assessed. After 24 h and 72 h, N. alexandria induced the highest settlement rate (p < 0.001). Larval settlement rate on slats coated with N. seminulum, and A. coffeaeformis was significantly higher after 72 h than after 24 h (p < 0.001). Metamorphosis was not higher than control after 24 h (p > 0.05) for any diatom treatment, but after 72 h, all diatoms induced a significantly higher metamorphosis rate than the control (p < 0.001). N. alexandria induced the highest metamorphic rate (15.71 %). Shell length of post-larvae was not significantly different on day 4 and day 10 (p > 0.05) in diatom film treatments, relative to control. By day 20, post-larvae survived best on slats with N. alexandria (79.86 %). Survival among treatments was the lowest on slats with N. seminulum (54.91 %), and no live larvae were found in the control. Post-larvae on slats with A. coffeaeformis showed the highest daily growth rate of shell length (DGsl) (87.44 μm d−1). Post-larvae on slats with N alexandria showed the lowest DGsl (55.66 μm d−1). Commercial nursery slats seeded with N. alexandria will result in high and consistent settlement, metamorphosis, and survival, while slats with A. coffeaeformis will ensure sufficient food for rapid growth of the H. asinina post-larvae.