| Food Habits and Distribution of the Lake Taal Sea Snake （Hydrophis semperi Garman 1881） and the Sympatric Little File Snake （Acrochordus granulatus Schneider 1799） in Lake Taal,Philippines |
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| 作者姓名： | Vhon Oliver S GARCIA, Rey Donne S PAPA, Jonathan Carlo A BRIONES, Norman MENDOZA, Noboru OKUDA, Arvin C DIESMOS |
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| 作者单位： | [1] The Graduate School, University of Santo Tomas, Manila, Philippines; [2]Research Center for the Natural andApplied Sciences, University of Santo Tomas, Manila, Philippines; [3]Department of Biological Sciences, University of Santo Tomas, Manila, Philippines; [4]Department of Science and Technology, Philippine Nuclear Research Institute, Philippines; [5]Center for Ecological Research, Kyoto University, Japan; [6]Herpetology Section, Zoology Division, National Museum of the Philippines, Philippines |
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| 基金项目： | Acknowledgements We like to express our sincerest gratitude to the following institutions that provided facilities and equipment support for this project： Research Center for the Natural and Applied Sciences （RCNAS）, University of Santo Tomas; Herpetology Section, National Museum of the Philippines; Philippine Nuclear Research Institute （PNRI）, Department of Science and Technology; Center for Ecological Research, Kyoto, Japan; the Fisheries Biological Station Complex, Bureau of Fisheries and Aquatic Resources for the identification of the gut contents of the sea snakes; and the Rufford Small Grants Foundation for the financial support in this project. N. Okuda, R. Papa, J. Briones, and N. Mendoza were also financially supported by the Feasibility Study Grant from the Research Institute for Humanity and Nature and the Cooperative Research Grant from the Center for Ecological Research, Kyoto University, Japan. We would also like to thank Jinzhong Fu for his comments on the manuscript. |
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| 摘 要： | Our knowledge about the food habits of sea snakes and how it is associated with their distribution has seen much development through its description across a number of species available through published literature except for the key threatened species such asHydrophis semperi. This paper aims to describe the food habits ofH. semperi through gut content and stable isotope analyses. We also compared data with the Little File Snake,Acrochordus granulatus, sympatric withH. semperi.Recorded captures ofH. semperi suggest that the sea snake tends to occur in the littoral zones and the shallower portions of the limnetic zone. Gut content analysis ofH. semperi have shown that gobies and eels are primary prey items. Halfbeaks （Family Hemiramphidae） were recorded as one of the Lake Taal Sea Snake＇s prey items which is considered as a new prey record for sea snakes. These extracted gut contents are conifrmed to be the temporal food preference ofH. semperi given our detected stable isotope signatures. It appears thatA. granulatus and H. semperi share common prey items suggesting possible diet overlap and resource competition.This study reports the ifrst account of the endemic Lake Taal Sea Snake＇s distribution and food habits which poses implications towards its conservation as it occurs in a restricted ecosystem that has undergone considerable habitat alteration.
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| 关 键 词： | 饮食习惯 海蛇 文件 稳定同位素分析 菲律宾 塔 濒危物种 同位素特征 |
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