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《Progress in Fishery Sciences》 2017-05
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Principal Component Analysis of the Morphometric Traits of the Cuttlebone of Sepia esculenta at Early Developmental Stages

LI Da;LIU Changlin;LI Ang;DU Tengfei;LIU Shufang;ZHUANG Zhimeng;College of Fisheries and Life Science, Shanghai Ocean University;Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences;Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology;Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology;  
To characterize the traits of the cuttlebone of Sepia esculenta at the early developmental stages, we collected data at different stages including the red-bead and black-bead stage, the heart-beating stage, the hatching stage, the newly-hatched larvae stage, the 5-day-old stage and the 10-day-old stage. The principal component analysis was performed to evaluate seven growth traits including the dorsal mantle length, the mantle breadth, the body weight, the cuttlebone length, the cuttlebone breadth, the cuttlebone weight and the lamella number. The results showed that there were significant correlations between any two traits at the red-bead and black-bead stage, the hatching stage and the 10-day-old stage. However, some traits showed no correlation at the heart-beating stage, the newly-hatched larvae stage and the 5-day-old stage. The first principal component was the weight factor at the first two stages, and it became the length factor at other four stages. The second principal component was the length factor and width factor. The third principal component was mostly the width factor. At only two stages there was the fourth principal component that was the lamella factor and the width factor. The growth rate of these traits varied at different stages. From the red-bead and black-bead stage to the heart-beating stage, the morphometric traits outgrew the body weight, and this pattern was reversed from the hatching stage to the 10-day-old stage.
【Fund】: “十二五”农村领域国家科技计划课题(2012BAD18B03);; 农业部东海与远洋渔业资源开发利用重点实验室开放课题(2014K01);; 基本科研业务费专项(20603022015009)共同资助~~
【CateGory Index】: S917.4
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