SummaryPelagic seabird populations have declined strongly worldwide. In the North Atlantic there was a huge reduction in seabird populations following the European colonization of the Azores, Madeira and Canary archipelagos but information on seabird status and distribution for the subtropical region of Cabo Verde is scarce, unavailable or dispersed in grey literature. We compiled and compared the historical and current distribution of all seabird species breeding in the Cabo Verde archipelago, updated their relative abundance, investigated their inland habitat preferences, and reviewed their threats. Currently, the breeding seabird community in Cabo Verde is composed of Bulwer’s Petrel Bulweria bulwerii, White-faced Storm-petrel Pelagodroma marina aedesorum, Cape Verde Shearwater Calonectris edwardsii, Cape Verde Storm-petrel Hydrobates jabejabe, Cape Verde Petrel Pterodroma feae, Boyd's Shearwater Puffinus lherminieri boydi, Brown Booby Sula leucogaster, and Red-billed Tropicbird Phaethon aethereus. One breeding species is currently extinct, the Magnificent Frigatebird Fregata magnificens. The relative abundance of Cape Verde Shearwater, Boyd’s Shearwater, Cape Verde Petrel, and Cape Verde Storm-petrel was determined from counts of their nocturnal calls in Santo Antão, São Vicente, Santa Luzia, Branco, Raso and São Nicolau. Cape Verde Petrel occurred only on mountainous islands (Santo Antão, São Nicolau, Santiago, and Fogo) from mid-to high elevations. Larger species such as the Cape Verde Shearwater and Boyd’s Shearwater exhibited a wider distribution in the archipelago, occurring close to the coastline but at lower densities on populated islands. Small procellariforms such as the Cape Verde Storm-petrel occurred at high densities only on rat-free islets and in steep areas of main islands where introduced cats and rats are unlikely to occur. The main threats to seabird populations in Cabo Verde range from predation by introduced predators, habitat alteration or destruction, and some residual human persecution.

中文翻译：

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佛得角海鸟的分布、数量和陆地威胁

总结远洋海鸟种群在全球范围内急剧下降。在欧洲殖民亚速尔群岛、马德拉群岛和加那利群岛后，北大西洋的海鸟数量大幅减少，但有关佛得角亚热带地区海鸟状况和分布的信息很少、无法获得或散布在灰色文献中。我们汇编并比较了佛得角群岛所有海鸟物种繁殖的历史和当前分布，更新了它们的相对丰度，调查了它们的内陆栖息地偏好，并审查了它们的威胁。目前，佛得角的繁殖海鸟群落由布尔沃海燕组成布尔韦利亚, 白面风暴海燕紫檀海藻, 佛得角海鸥爱德华七世, 佛得角风暴海燕Hydrobates jabejabe, 佛得角海燕蕨类植物, 博伊德的海鸥河豚, 布朗鲣鸟白苏拉和红嘴热带鸟法厄同. 一种繁殖物种目前已经灭绝，壮丽的军舰鸟壮丽的军舰船. 佛得角海燕、博伊德海燕、佛得角海燕和佛得角风暴海燕的相对丰度是根据它们在 Santo Antão、São Vicente、Santa Luzia、Branco、Raso 和 São Nicolau 的夜间呼叫数量确定的。佛得角海燕只出现在中高海拔的山区岛屿（Santo Antão、São Nicolau、Santiago 和 Fogo）。较大的物种，如佛得角海鸥和博伊德海鸥在群岛中的分布范围更广，靠近海岸线，但在人口稠密的岛屿上密度较低。像佛得角风暴海燕这样的小型原生动物仅在无鼠小岛和主要岛屿的陡峭地区以高密度出现，在那里引入的猫和老鼠不太可能出现。