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首页> 外文期刊>Wader Study Group Bulletin >Seasonal occurrence and site use by shorebirds at Sonadia Island, Cox's Bazar, Bangladesh
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Seasonal occurrence and site use by shorebirds at Sonadia Island, Cox's Bazar, Bangladesh

机译：孟加拉国考克斯巴扎尔的索纳迪亚岛shore鸟的季节性发生和现场利用

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We studied shorebird phenology at Sonadia Island, Cox's Bazar, Bangladesh between Oct 2009 and Mar 2010. Boat-based surveys were carried out with a special focus on Spoon-billed Sandpiper Eurynorhynchus pygmeus and other endangered, threatened or vulnerable shorebirds including Nordmann's Greenshank Tringa guttifer, Eurasian Curlew Numenius arquata, Great Knot Calidris tenuirostris and Black-tailed Godwit Limosa limosa. An aggregate total of 12,710 shorebirds of 28 species were recorded in Oct 2009, Jan 2010 and Mar 2010 at seven sites on or close to Sonadia Island. Maximum numbers of shorebirds and of shorebird species were counted during northward migration in Mar 2010 (6,714 individuals of 26 species).In Oct 2009, the most abundant species were Lesser Sandplover Charadrius mongolus (22.5% of the total count), Curlew Sandpiper Calidris ferruginea (20.3%) and Greater Sandplover Charadrius leschenaultia (16%); in Jan 2010, Lesser Sandplover (36.2%), Great Knot Calidris tenuirostris (18.6%) and Greater Sandplover (19.0%); and in Mar 2010, Lesser Sandplover (11.0%), Greater Sandplover (9.4%) and Curlew Sandpiper (7.8%). However, in October and March the percentage of probably both sandplover species would have been greater because of the considerable numbers of unidentified sandplover species that were recorded. Two globally endangered species were recorded with maximum numbers of both in March 2010: 25 Spoonbilled Sandpipers (5-7% of the estimated world population of 350-500), and 28 Nordmann's Greenshanks (3-6% of the estimated world population of 500-1,000). In the same month there were peak counts of 433 Great Knots, 70 Black-tailed Godwits and 120 Eurasian Curlews which are all categorized as threatened or vulnerable by BirdLife International (BirdLife International 2011, Zockler et al. 2010). We identified the most important feeding and roosting grounds for Spoon-billed Sandpiper and Nordmann's Greenshank as Kaladia, Belekardia and Hasher Char; these meet the 1% threshold criterion to qualify as a Ramsar Site. Sonadia Island also meets several Ramsar criteria for recognition as a Wetland of International Importance.
机译：我们在2009年10月至2010年3月之间在孟加拉国考克斯巴扎尔的索纳迪亚岛研究了水鸟的物候。进行了船基调查，重点关注的是匙嘴沙Sand Eurynorhynchus pygmeus和其他濒危，威胁或脆弱的水鸟，包括诺德曼（Nordmann）的Greenshank Tringa guttifer ，欧亚Curlew Numenius arquata，大结Calidris tenuirostris和黑尾黑尾戈德威特Limosa limosa。在2009年10月，2010年1月和2010年3月，在索纳迪亚岛上或附近的七个地点共记录了12,710种水鸟，共28种。在2010年3月向北迁徙期间，统计出最多的水鸟和水鸟物种数量（6,714个物种，共26种）。2009年10月，最丰富的物种是小桑pl Charadrius mongolus（占总数的22.5％），Cur鸟桑Cali Calidris ferruginea （20.3％）和大沙pl Charadrius leschenaultia（16％）;在2010年1月，小桑（（36.2％），大结Cali（18.6％）和大桑pl（19.0％）;在2010年3月，小桑Sand（11.0％），大桑（（9.4％）和柯鲁·Sand（7.8％）。但是，由于记录的大量未识别的沙pl物种，在十月和三月，两种沙sand物种的百分比可能会更高。在2010年3月，记录到两个全球濒危物种，数量最多，分别为：25琵嘴Sand（占全球估计人口350-500的5-7％）和28诺德曼绿胫（占世界估计人口500-3-的6％） -1,000）。在同一个月，最高数量为433个大结，70个黑尾戈德维特人和120个欧亚Cur子，它们均被BirdLife International归类为受威胁或脆弱的物种（BirdLife International 2011，Zockler等人2010）。我们确定了勺嘴Sand和诺德曼绿脚shan最重要的觅食和栖息地为卡拉迪亚，贝莱卡迪亚和哈舍尔·夏尔;这些符合1％的阈值标准，有资格成为拉姆萨尔遗址。索纳迪亚岛（Sonadia Island）还符合若干拉姆萨尔（Ramsar）标准，被公认为国际重要湿地。

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