Effects of light quality and intensity on the growth,survival and metamorphosis of Haliotis discus hannai Ino larvae |
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| Authors: | Xiaolong Gao Mo Zhang Xian Li Changbin Song Ying Liu |
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| Affiliation: | 1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China;2. University of Chinese Academy of Sciences, Beijing, China;3. Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China |
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| Abstract: | Light is a key environmental factor that influences the growth, culture and survival of aquatic organisms. This study examined the effects of different light qualities (red, orange, white, blue and green light) and intensities (5 μmol m?2 s?1, 15 μmol m?2 s?1 and 40 μmol m?2 s?1) on the hatching and metamorphosis of larva of Haliotis discus hannai Ino and the growth and survival of juveniles. It was found that under blue and green light, the hatching success rate and metamorphosis of larva were significantly higher than those for any other light quality (P < 0.05), and there was a decreasing trend with an increase in light intensity. Under red and orange light, the abnormality rate of trochophores in each light intensity treatment and the time required for the metamorphosis of larva were significantly higher than those for any other light group (P < 0.05). Both the abnormality and metamorphosis rates significantly increased with light intensity. Under white light, at an intensity of 40 μmol m?2 s?1, the settlement and size of larva at metamorphosis were significantly smaller than those for any other light intensity (P < 0.05). Under red and orange light, the SGR of juvenile abalone in each light intensity treatment was significantly lower than that in any other light group (P < 0.05), but no significant difference was identified (P > 0.05). Therefore, selecting blue and green light and controlling the light intensity to 5–15 μmol m?2 s?1 during fingerling reproduction of abalone should increase the hatching success rate of larva and the yield per water body. |
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| Keywords: | Haliotis discus hannai Ino larva light quality light intensity |
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