| Low Liang Boon,Syazwan Wan Mohd,Rizman-Idid Mohammed. 2019. A morphological evaluation of Chrysaora chinensis of Peninsular Malaysia and distinguishing its populations using geometric morphometrics. Acta Oceanologica Sinica, 38(10):67－74 |
| A morphological evaluation of Chrysaora chinensis of Peninsular Malaysia and distinguishing its populations using geometric morphometrics |
| A morphological evaluation of Chrysaora chinensis of Peninsular Malaysia and distinguishing its populations using geometric morphometrics |
| Received:October 25, 2018 |
| DOI：10.1007/s13131-019-1483-6 |
| Key words:geometric morphometrics|Scyphozoa|jellyfish|morphology|Malaysia |
| 中文关键词: geometric morphometrics|Scyphozoa|jellyfish|morphology|Malaysia |
| 基金项目:The University of Malaya, Kuala Lumpur, Malaysia through UMRG Grant under contract No. RG104-11SUS; UMRP Grant under contract No. RU006E-2014; the postgraduate sponsorship from the Ministry of Higher Education (MyBrain scholarship programme). |
| Author Name | Affiliation | E-mail | | Low Liang Boon | Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia
Institute of Graduate Studies, University of Malaya, Kuala Lumpur 50603, Malaysia | | | Syazwan Wan Mohd | Institute of Biological Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia | | | Rizman-Idid Mohammed | Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia | rizman@um.edu.my |
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| Abstract: |
| The morphology of seven specimens of Chrysaora chinensis (Scyphomedusae, Semaestomae) obtained from four sites off the coast of Peninsular Malaysia was examined. Morphological characteristics of C. chinensis that encompasses structures such as the bell, tentacles, oral arms, stomach, manubrium, radial canals and gonads were described in detail. A total of 107 specimens that represented C. chinensis populations of four coastal areas of Peninsular Malaysia (East-Central, East-North, West-Central, and West-North) were also analysed for shape variation using geometric morphometric analysis. Procrustes superimposition, Principal Component Analysis (PCA) and Canonical Variate Analysis (CVA) were applied to the images of gastrovascular pouches of C. chinensis to extract the shape information. Independent contrasts were used for comparisons between shapes. There were no significant differences in shape variation between all the specimens based on the PCA results. However, CVA results showed shape variations between specimens taken from the four areas of Peninsular Malaysia, especially with higher magnitudes of Mahalanobis distances between the east and west coast areas, including between East-Central and East-North, but lower magnitudes were detected between the West-Central and West-North. |
| 中文摘要: |
| The morphology of seven specimens of Chrysaora chinensis (Scyphomedusae, Semaestomae) obtained from four sites off the coast of Peninsular Malaysia was examined. Morphological characteristics of C. chinensis that encompasses structures such as the bell, tentacles, oral arms, stomach, manubrium, radial canals and gonads were described in detail. A total of 107 specimens that represented C. chinensis populations of four coastal areas of Peninsular Malaysia (East-Central, East-North, West-Central, and West-North) were also analysed for shape variation using geometric morphometric analysis. Procrustes superimposition, Principal Component Analysis (PCA) and Canonical Variate Analysis (CVA) were applied to the images of gastrovascular pouches of C. chinensis to extract the shape information. Independent contrasts were used for comparisons between shapes. There were no significant differences in shape variation between all the specimens based on the PCA results. However, CVA results showed shape variations between specimens taken from the four areas of Peninsular Malaysia, especially with higher magnitudes of Mahalanobis distances between the east and west coast areas, including between East-Central and East-North, but lower magnitudes were detected between the West-Central and West-North. |
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