Use of a traditional Maori harvesting method, the tau kōura, for monitoring kōura (freshwater crayfish, Paranephrops planifions) in Lake Rotoiti, North Island, New Zealand
Use of a traditional Maori harvesting method, the tau kōura, for monitoring kōura (freshwater crayfish, Paranephrops planifions) in Lake Rotoiti, North Island, New Zealand
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使用毛利人传统的捕捞方法 tau kōura 来监测新西兰北岛罗托伊蒂湖的 kōura（淡水小龙虾，Paranephrops planifions）
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Quinn
中科院分区：
文献类型：
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作者：
I. Kusabs;J. Quinn
摘要由于缺乏有代表性的方法，对淡水小龙虾（Paranephrops planifrons）进行采样以评估湖泊中的种群丰度和结构往往是困难或不切实际的。Tau kôura是毛利人在北岛中部的湖泊中捕捉kôura的传统方法，将whakaweku（一捆蕨类植物Pteridium esculentum）放在kôura然后殖民的湖床上。作为监测工具，它比传统方法（如诱饵陷阱和潜水调查）具有优势，因为它对所有kôura大小级别进行采样，可以在浑浊的沃茨和广泛的深度范围内使用，并且不需要昂贵的设备或专业知识（例如，SCUBA）。我们展示了它的使用，以监测kôura人口在湖Rotoiti（平均深度32米），北岛，新西兰。该方法的应用允许在人口规模结构的差异，以区分一个浅的和一个中等深度的网站内湖Rotoiti和辨别季节性繁殖模式。
Abstract Sampling of kōura (freshwater crayfish Paranephrops planifrons) to assess population abundance and structure in lakes is often difficult or impractical because of the absence of representative methods. The tau kôura is a traditional Maori method used to catch kôura in central North Island lakes by placing whakaweku (bundles of bracken fern Pteridium esculentum) on the lake bed that kôura then colonise. It has advantages as a monitoring tool over conventional methods, such as baited traps and dive surveys, as it samples all kôura size classes, can be used in turbid waters and at a wide range of depths, and does not require expensive equipment or specialised expertise (e.g., SCUBA). We demonstrate its use to monitor kôura populations in Lake Rotoiti (mean depth 32 m), North Island, New Zealand. Application of the method allowed differences in population size structure to be distinguished between a shallow and a moderate depth site within Lake Rotoiti and to discern seasonal breeding patterns.