| 摘要: |
| 采用室内实验生态学方法，以水体中氨氮、活性磷酸盐和溶氧变化为指标研究了光照强度和光色对番红砗磲代谢的影响。结果表明：（1）在0-10000lx光照时，番红砗磲排氨量逐渐减少，在光照12000lx时转为吸收海水中氨氮，并在16000lx时达到最高[1.89μg/（ind·h）]；在2000lx光照条件下，番红砗磲可吸收海水中活性磷酸盐并释放氧气。其活性磷酸盐吸收量随光照强度增强而增加，在16000lx时达到最高峰。在实验光照范围内，番红砗磲产氧率随光照强度的增强逐渐增加。上述结果显示番红砗磲最佳光照强度约为16000lx。（2）当番红砗磲自黑暗转移至各光照组后，其氨氮、活性磷酸盐吸收率均随时间逐渐降低，而产氧率则逐渐升高。（3）光色显著影响番红砗磲合成代谢，蓝光最佳，红光次之，白光最差。 |
| 关键词: 番红砗磲 光照强度 光色 代谢 |
| DOI：10.11693/hyhz20170700183 |
| 分类号:S917 |
| 基金项目:海南省自然科学基金面上项目，317029号；海南大学科研团队培育专项项目，hdkytg201704号。 |
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| EFFECTS OF LIGHT INTENSITY AND SPECTRA ON METABOLISM OF AMMONIA, ACTIVE PHOSPHATES, AND OXYGEN CONSUMPTION IN TRIDACNA CROCEA |
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LIU Chun-Sheng1,2, LIU Xiao-Xia2, WANG Hao2, WANG Ai-Min1,2, GU Zhi-Feng1,2
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1.Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou 570228, China;2.Ocean College, Hainan University, Haikou 570228, China
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| Abstract: |
| The metabolism of Tridacna crocea was studied under laboratory conditions using experimental ecology methods with the indexes of ammonia nitrogen, active phosphates, and dissolved oxygen under different light intensity and spectral conditions. The ammonia excretion of T. crocea declined with light intensity between 0 and 10000lx, and the concentration of ammonia decreased at 12000lx, which meant the ammonia assimilation in giant clams, and the highest absorption rate was 1.89μg·ind/hat 16000lx. The absorption rate of active phosphate increased with light intensity rise and reached the peak at 16000lx. The oxygen production rate showed a positive relationship with light intensity. The absorption rates of ammonia and active phosphate decreased with time, while the oxygen production rate was opposite. In addition, light spectra affected significantly the assimilation metabolism, of which blue light was the largest, followed by red, and then white, the least. This is the first attempt of study on the effects of light on the metabolism of T. crocea. The results shall be helpful for understanding the ecological function and stock enhancement of the giant claims. |
| Key words: Tridacna crocea light intensity light spectra metabolism |
