| 春季迁徙停歇期大滨鹬在中国崇明东滩的食物分析 |
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| 引用本文： | 张璇,华宁,马强,薛文杰,冯雪松,吴巍,汤臣栋,马志军.春季迁徙停歇期大滨鹬在中国崇明东滩的食物分析[J].中国鸟类,2011,2(1):27-32. |
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| 作者姓名： | 张璇 华宁 马强 薛文杰 冯雪松 吴巍 汤臣栋 马志军 |
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| 作者单位： | 1. 复旦大学生物多样性科学研究所,生物多样性与生态工程教育部重点实验室,长江河口湿地生态系统野外科学观测研究站,上海,200433
2. 崇明东滩鸟类国家级自然保护区,上海崇明,202183 |
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| 基金项目： | This,study,was,financially,supported,by,the,National,Natural,Science,Foundation,of,China |
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| 摘 要： | 迁徙停歇地多变而难以预测的食物资源给鸻鹬类的觅食活动带来了严峻挑战.机会主义觅食策略,即鸻鹬类摄取食物的比例与食物可利用性的高低相一致,可以使鸻鹬类高效地补充能量和营养物,尽快为下一阶段的迁徙活动做好准备.崇明东滩位于中国东部的长江口,该区域是鸻鹬类北迁途中在中国大陆的第一个重要迁徙停歇地.通过底栖动物调查和粪便分析,...
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| 关 键 词： | Calidris tenuirostris 崇明东滩 食物 觅食策略 大滨鹬 |
Diet of Great Knots (Calidris tenuirostris) during spring stopover at Chongming Dongtan, China |
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| Xuan ZHANG,Ning HUA,Qiang MA,Wenjie XUE,Xuesong FENG,Wei WU,Chendong TANG,Zhijun MA.Diet of Great Knots (Calidris tenuirostris) during spring stopover at Chongming Dongtan, China[J].Chinese Birds,2011,2(1):27-32. |
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| Authors: | Xuan ZHANG Ning HUA Qiang MA Wenjie XUE Xuesong FENG Wei WU Chendong TANG Zhijun MA |
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| Abstract: | Variable and unpredictable food resources at stopover sites bring severe challenges to migrating shorebirds. Opportunistic foraging strategies, referring to shorebirds consuming prey in proportion to their availability, allow shorebirds to replenish fuel and nutrient reserves efficiently for continuing their migration. Chongming Dongtan, located in the Yangtze River estuary of eastern China, is the first major stopover site of shorebirds on the Chinese mainland during their northward migration. We investigated the diet of Great Knots (Calidris tenuirostris) at Chongming Dongtan during the spring stopovers of 2009 and 2010 through benthos sampling and dropping analysis. The benthos samples were categorized into gastropods, bivalves, polychaetes, crustaceans and insect larvae. Dropping analysis indicated that gastropods and bivalves constituted more than 70% of the diet of the Great Knot, with Assiminea violacea and Corbicula fluminea being the most frequently consumed. Chi-square tests indicated that for each prey category, there was no significant difference between the frequency of its occurrence in the benthos samples and dropping samples during the early stopover periods of 2009 and 2010 and during the late stopover periods of 2010. Although there was a statistically significant difference between the frequency of occurrence of prey in the total macrobenthos and in the droppings of the Great Knots during the late stopover period in 2009, the more abundant prey were more frequently consumed by the Great Knots. This suggests that Great Knots adopted an opportunistic foraging strategy during their stopover at Chongming Dongtan. |
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| Keywords: | Calidris tenuirostris Chongming Dongtan diet foraging strategy Great Knot |
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