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首页> 外文期刊>Aquatic Biology >Ornamental trade as a pathway for Australian ­redclaw crayfish introduction and establishment
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Ornamental trade as a pathway for Australian ­redclaw crayfish introduction and establishment

机译：观赏贸易作为引入和建立澳大利亚红爪小龙虾的途径

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ABSTRACT: The ornamental trade is one of the major vectors of freshwater animal species translocation worldwide. The Australian redclaw crayfish Cherax quadricarinatus was brought into Singapore through the trade and culture of aquarium specimens during the late 1980s. From 2000 to the present, redclaw crayfish have been observed in at least 3 of Singapore’s 13 reservoirs, including 2 inland reservoirs in the Central Catchment Nature Reserve (CCNR). The current paper presents the first in situ population data of feral C. quadricarinatus populations originating from ornamental trade and includes updated distribution records in Singapore based on recent surveys and museum samples. We report a C. quadricarinatus range expansion in 2 additional reservoirs (1 coastal and 1 inland), and the presence of multiple size cohorts confirms the establishment of reproducing populations in 2 coastal reservoirs and 1 CCNR reservoir. This is alarming as the current distribution borders Singapore’s oldest and arguably most important nature reserve (Bukit Timah Nature Reserve: BTNR) and encircles the single remaining substantial freshwater swamp forest in the country (Nee Soon). The Nee Soon swamp forest and BTNR have extremely high conservation value as both areas together harbour the richest native freshwater fauna and flora of the island. Therefore, any range expansion of C. quadricarinatus in Singapore may have severe impacts on its native freshwater fauna and demands immediate attention. As C. quadricarinatus is one of the many invasive freshwater ­species occurring from the aquarium trade in Singapore, we argue that trade control might prevent ­further establishment of ornamentals.
机译：摘要：观赏贸易是全世界淡水动物物种易位的主要媒介之一。在1980年代后期，通过水族标本的贸易和养殖，将澳大利亚红爪小龙虾 Cherax quadricarinatus 引入了新加坡。从2000年至今，在新加坡的13个水库中，至少有3个发现了红爪小龙虾，其中包括中央集水区自然保护区（CCNR）的2个内陆水库。本文介绍了野生iC的第一批ii原位种群数据。来自观赏性贸易的quadricarinatus 种群，其中包括根据最近的调查和博物馆样本在新加坡更新的分布记录。我们报告 C。 Quadricarinatus 在另外2个水库（1个沿海和1个内陆）中扩大了范围，并且存在多个规模的队列，这证实了2个沿海水库和1个CCNR水库中繁殖种群的建立。令人震惊的是，目前的分布与新加坡最古老，可以说是最重要的自然保护区（武吉知马自然保护区：BTNR）接壤，并包围了该国仅存的大量淡水沼泽森林（新顺）。 Nee Soon沼泽森林和BTNR具有极高的保护价值，因为这两个地区共同拥有该岛最丰富的本地淡水动植物。因此， C的任何范围扩展。在新加坡，quadricarinatus 可能会对其本地淡水动物群产生严重影响，需要立即引起注意。作为 C。 Quadricarinatus 是新加坡水族贸易中许多外来入侵淡水物种之一，我们认为贸易控制可能会阻止进一步建立观赏植物。

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