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首页> 外文期刊>Oryx >Rapid decline of the endemic giant land snail Archachatina bicarinata on the island of Principe, Gulf of Guinea
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Rapid decline of the endemic giant land snail Archachatina bicarinata on the island of Principe, Gulf of Guinea

机译：几内亚湾普林西比岛上的特有巨型蜗牛Archachatina bicarinata迅速下降

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摘要

Terrestrial and freshwater molluscs are amongst the most threatened of all taxa, yet data exist on the distribution and status of only a small proportion of the species. Here we present the results of the first systematic survey of a terrestrial mollusc on the island of Principe in the Gulf of Guinea. Archachatina bicarinata has never been previously surveyed, despite being categorized as Vulnerable on the IUCN Red List and suffering from unregulated harvesting for food. We found that A. bicarinata is restricted to primary rainforest and its abundance and probability of occurrence increased as surveyed sites became less accessible. Additional anecdotal evidence from the observations of previous scientific expeditions, local guides and snail harvesters suggested that the species has suffered a dramatic decline in population size and distribution in recent years. We therefore recommend that immediate action be taken to prevent its imminent extinction on Principe. The collection of A. bicarinata from protected areas should be banned, as should commercial harvesting and sales. Subsistence collecting should be limited to larger individuals. Our data have been used to inform the management plans for the protected areas on Principe and Sao Tome, and this should help to ensure the future of A. bicarinata on both islands.
机译：陆地和淡水软体动物是所有生物类别中受威胁最大的物种之一，但仅存在有关小部分物种分布和状况的数据。在这里，我们介绍了几内亚湾普林西比岛上一个陆地软体动物的首次系统调查结果。尽管在世界自然保护联盟（IUCN）的红色名录中被列为“易受伤害”且遭受了粮食收割的不规范，但从未对双足Archachatina bicarinata进行过调查。我们发现A. bicarinata仅限于原始雨林，并且随着调查地点的可及性降低，其丰富性和发生概率增加。从先前的科学考察，当地向导和蜗牛收割者的观察中获得的其他轶事证据表明，该物种近年来的种群规模和分布急剧下降。因此，我们建议立即采取行动，以防止其在普林西比（Principe）上灭绝。应禁止从保护区收集双歧曲霉，以及商业性收获和销售。生活资料收集应仅限于较大的个体。我们的数据已用于为普林西比和圣多美保护区的管理计划提供信息，这将有助于确保两个岛屿上双歧杆菌的未来。

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