Invasive species typically establish in areas outside their natural distribution through accidental introduction and accidental release or escape. Some species are introduced legally for economic and social benefits such as recreational hunting, the pet trade and research through established permitting processes driven by appropriate laws and regulations. The aim of this study was to determine whether there is a trend in demand for regulated alien taxa based on permit requests and to ascertain the activities for which permits requested in order to infer the drivers of alien taxa demand in South Africa. We examined the Department of Environmental Affairs (DEA) species permitting application database records from October 2015 to February 2018. From the total of 1,390 permit applications during this period, 79.2% of the permits were issued for various economic and social activities associated with the following species: Red lechwe (Kobus leche leche, Gray), fallow deer (Dama dama Linnaeus), Grass carp (Ctenopharyngodon idella Valenciennes), Nile tilapia (Oreochromis niloticus Linnaeus) and rose‐ring parakeet (Psittacula krameri Scopoli). Our results suggest that economic activities such as hunting and sport fishing are driving the demand for some regulated species. We suggest reinforced monitoring and inspection for permit compliance for species sought to minimise potential escape.

中文翻译：

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2015-2018年期间南非许可申请和签发受管制外来和入侵物种的模式

入侵物种通常通过意外引入和意外释放或逃逸而在其自然分布以外的地区建立。为了经济和社会利益，某些物种被合法引进，例如休闲狩猎，宠物贸易和通过适当的法律和法规推动的既定许可程序进行研究。这项研究的目的是根据许可要求确定受管制的外国人生物分类的需求是否存在趋势，并确定需要许可的活动，以推断出南非外国人生物分类需求的驱动因素。我们检查了2015年10月至2018年2月环境部（DEA）物种许可申请数据库的记录。在此期间的1,390种许可申请总数中，有79种。Kobus leche leche，灰色），小鹿（Dama dama Linnaeus），草鱼（Ctenopharyngodon idella Valenciennes），尼罗罗非鱼（Oreochromis niloticus Linnaeus）和玫瑰环长尾小鹦鹉（Psittacula krameri Scopoli）。我们的结果表明，狩猎和运动捕鱼等经济活动正在推动对某些受管制物种的需求。我们建议对试图最小化潜在逃逸的物种进行严格的监控和检查，以确保其是否合规。