Effects of dietary guaiacol on shell biomineralization of juvenile abalone Haliotis discus hannai, Ino |
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| Authors: | Wenbing Zhang Kangsen Mai Wei Xu Zhiguo Liufu Beiping Tan Qinghui Ai Hongming Ma & Xiaojie Wang |
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| Institution: | Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, Qingdao, China |
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| Abstract: | A study was conducted to investigate the effects of guaiacol on shell biomineralization of abalone Haliotis discus hannai Ino. Seven semi-purified diets were formulated with graded levels of guaiacol (0, 5, 10, 50, 100, 500 and 1000 mg kg?1). Abalone (initial weight: 0.29±0.01 g; initial shell length: 8.55±0.27 mm) were fed with these diets in a re-circulated water system for 152 days. The results showed that the contents of calcite in the shell increased significantly with dietary guaiacol levels, but the aragonite content decreased significantly. Dietary guaiacol significantly decreased the contents of calcium and strontium, but significantly increased the magnesium content in the shell. The effects of dietary guaiacol on the contents of phosphorus and zinc in shell were not significant. It was obvious that the ratio of potential acidic/basic amino acids (Asx+Glx)/(Lys+Arg+His)] in the shell was elevated by dietary guaiacol. In conclusion, dietary guaiacol has effects on both the mineralogy and the amino acid composition in the shell. Furthermore, changes in mineralogy are related to the ratio of (Asx+Glx)/(Lys+Arg+His) in the shell. |
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| Keywords: | Haliotis discus hannai shell biomineralization guaiacol mollusc |
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