Comparative performance of growth,vertebral structure and muscle composition in diploid and triploid Paralichthys olivaceus |
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| Authors: | Hui Liu Zhihao Wu Xiangping Zhu Zongcheng Song Jinwei Hu Lijuan Wang Jun Li Feng You |
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| Affiliation: | 1. CAS Key Laboratory of Experimental Marine Biology, National & Local Joint Engineering Laboratory of Ecological Mariculture, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China;2. Animal Science and Technology Department, Qingdao Agricultural University, Qingdao, China;3. Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China;4. Center for Ocean Mega‐Science, Chinese Academy of Sciences, Qingdao, China;5. Shenghang Aquatic Science and Technology Co. Ltd., Weihai, China |
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| Abstract: | Growth, skeletal structure and muscle composition of cold‐shock‐induced triploid olive flounder Paralichthys olivaceus were investigated. The average values of total length and total weight of triploids were higher than those of diploids from 5 to 11 months posthatch (mph). The growth difference disappeared after 11 mph. The skeletal structure of flounder at 11 mph was observed by X‐ray imaging method. There are four kinds of vertebral deformity including vertebrae fusion, one‐sided compression, two‐sided compression and vertically shifted. The trunk region (V8–18) and tailing end of the vertebral column were the predominant locations of deformity. In general, the frequencies of vertebral deformities in triploids (60.0%) were higher than those in diploids (33.3%, p < 0.05). Both the number of fish with deformed vertebrae and the average frequencies of deformed vertebrae in triploids were significantly higher than those in diploids (p < 0.05). The muscle tissues of diploid and triploid flounder at 11 mph contain the same types of fatty acid and free amino acid profiles. The number of fatty acids with significant higher contents in diploids and triploids was one and ten, respectively (p < 0.05). The contents of free amino acids showed no difference between triploid and diploid fish. |
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| Keywords: | diploid and triploid growth trait muscle composition olive flounder Paralichthys olivaceus vertebral structure |
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