Threatened to least concern and after: the Barnacle Goose Branta leucopsis in Latvia

Hakon Kampe-Persson
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引用次数: 0

Abstract

In Latvia, the Barnacle Goose Branta leucopsis was, except for a period in the first half of the 19th century, reported to be rare or relatively rare from the late 18th century to about 2010. The marked change in conservation status from threatened in 1985 to least concern in 2000 was due to better knowledge about the situation at the Russian breeding grounds and had nothing to do with the occurrence in Latvia. Since the first flock ever of at least 100 individuals was observed in April 2007, the number of spring-staging birds has shown a steady increase. In 2021, numbers reached 5000 birds in the Svēte flood-plain staging area and more than 10 000 in the country as a whole. Numbers were lower in autumn. There are no recoveries or re-sightings of marked individuals indicating the origin of the staging birds. The increase in numbers in Latvia coincided with a marked decline in importance of the islands in the Baltic Sea for breeding and spring-staging Barnacle Geese.
最不受关注的威胁:拉脱维亚的Barnacle Goose Branta leucopsis
在拉脱维亚,除了19世纪上半叶的一段时间外,据报道,从18世纪末到2010年左右,Barnacle Goose Branta leucopsis是罕见的或相对罕见的。保护状况从1985年的受威胁到2000年的最不受关注的显著变化是由于对俄罗斯繁殖地的情况有了更好的了解,与拉脱维亚的情况无关。自2007年4月首次观察到至少有100只个体的鸟群以来,春季候鸟的数量一直在稳步增长。2021年,Svēte洪泛平原集散地的鸟类数量达到5000只,整个国家的鸟类数量超过1万只。秋季的数量较低。没有恢复或重新发现有标记的个体,表明分期鸟类的起源。拉脱维亚藤壶鹅数量的增加与波罗的海岛屿对藤壶鹅繁殖和春季繁殖的重要性显著下降相吻合。
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来源期刊
CiteScore
1.10
自引率
0.00%
发文量
15
审稿时长
12 weeks
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