ABSTRACT Pellets of indigestible material regurgitated by Herring Gulls Larus argentatus breeding on Lady Isle, Firth of Clyde, Scotland, were collected in 2018 and 2019 and examined for earthworm chaetae. Nearly two-thirds (65.6%) of the 314 pellets came from gulls that had consumed one or more earthworms. Significantly fewer pellets (57.6%) contained chaetae in 2018, a relatively dry May to July, than in 2019 (72.0%) when rainfall was close to the long-term average for May to July. There were significant associations between the presence of large quantities of terrestrial vegetation in the pellet and the detection of large numbers of earthworm chaetae and/or fragments of terrestrial arthropods, suggesting that recent consumption of these food items is likely when pellets contain large quantities of vegetation.

中文翻译：

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在离岸岛屿上繁殖的鲱鸥 Larus argentatus 饮食中的蚯蚓

摘要 在 2018 年和 2019 年收集了苏格兰克莱德湾 Lady Isle 上繁殖的鲱鸥 Larus argentatus 所吐出的难消化物质颗粒，并检查了蚯蚓毛虫。314 个颗粒中近三分之二 (65.6%) 来自食用了一条或多条蚯蚓的海鸥。2018 年（5 月至 7 月相对干燥）含有毛藻的颗粒（57.6%）明显少于 2019 年（72.0%），当时降雨量接近 5 月至 7 月的长期平均值。颗粒中大量陆生植物的存在与检测到大量蚯蚓毛毛虫和/或陆生节肢动物碎片之间存在显着关联，这表明当颗粒中含有大量植物时，最近食用这些食物很可能.