| PRINTRAKOON Cheewarat,ROOPNARINE Peter D,YEEMIN Thamasak. 2019. Ecology of Pinnidae (Mollusca: Bivalvia) from the Gulf of Thailand. Acta Oceanologica Sinica, 38(2):52－69 |
| Ecology of Pinnidae (Mollusca: Bivalvia) from the Gulf of Thailand |
| Ecology of Pinnidae (Mollusca: Bivalvia) from the Gulf of Thailand |
| Received:July 27, 2017 |
| DOI：10.1007/s13131-018-1230-4 |
| Key words:density distribution pinnid shell shell adaptation the Gulf of Thailand |
| 中文关键词: density distribution pinnid shell shell adaptation the Gulf of Thailand |
| 基金项目:The Thai Research Fund, Office of the Higher Education Commission, KURDI and PRF from Faculty of Science, Kasetsart University. |
| Author Name | Affiliation | E-mail | | PRINTRAKOON Cheewarat | Animal Systematic Special Unit, Department of Zoology, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand | fscicrp@ku.ac.th,cheewarat040@gmail.com | | ROOPNARINE Peter D | Department of Invertebrate Zoology and Geology, California Academy of Sciences, San Francisco, California 94118, USA | | | YEEMIN Thamasak | Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand | |
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| Abstract: |
| The ecology of the family Pinnidae was studied by sampling three pinnid species from 36 sampling sites across four different microhabitats in the Gulf of Thailand. The species spatial distributions were mostly uniform, with some populations having random distributions. Species abundances differed between sandy and coral habitats according to non-metric multi-dimension scaling analyses. Although the Gulf of Thailand is a relatively small geographic area, habitats are varied enough to provide variable shell densities. Small islands are important distribution areas, and coral reefs provide both direct and indirect shelter which support high abundances, densities and increased shell size. The highest density was recorded in sand beds within coral reefs. Low density and small shell size in sand beaches might be related to high mortality in shallow water or to adaptations for survival in shallow waters. A clear correlation between sediment composition and species abundance was found in Pinna atropurpurea; abundance increased with the sand content of the sediment. For P. deltodes, abundance increased as the rock fraction of the sediment increased. These results suggest that adaptations in Pinnidae, such as shell size, shell morphology, and the exposure of the shell above the sediment-water interface, are responses for survival in different habitats. |
| 中文摘要: |
| The ecology of the family Pinnidae was studied by sampling three pinnid species from 36 sampling sites across four different microhabitats in the Gulf of Thailand. The species spatial distributions were mostly uniform, with some populations having random distributions. Species abundances differed between sandy and coral habitats according to non-metric multi-dimension scaling analyses. Although the Gulf of Thailand is a relatively small geographic area, habitats are varied enough to provide variable shell densities. Small islands are important distribution areas, and coral reefs provide both direct and indirect shelter which support high abundances, densities and increased shell size. The highest density was recorded in sand beds within coral reefs. Low density and small shell size in sand beaches might be related to high mortality in shallow water or to adaptations for survival in shallow waters. A clear correlation between sediment composition and species abundance was found in Pinna atropurpurea; abundance increased with the sand content of the sediment. For P. deltodes, abundance increased as the rock fraction of the sediment increased. These results suggest that adaptations in Pinnidae, such as shell size, shell morphology, and the exposure of the shell above the sediment-water interface, are responses for survival in different habitats. |
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