HAIRSTON N G, HUBENDICK B, WATSON J M, OLIVIER L J
Bull World Health Organ. 1958;19(4):661-72.
No uniform method, applicable to all situations, can be developed for the quantitative study of bilharziasis vector snail populations. The selection of survey technique and sampling device depends on the objectives of the study, the circumstances in which the work is carried out, the nature of the habitat and the resources available.The various techniques used in obtaining snail-population estimates are divided into two categories-direct methods and indirect methods. The former involve the collection of snails from a specified habitat or for a specified period of time, while the latter include techniques, such as snail marking and palm-leaf traps, in which the snails are not obtained through the efforts of a collector. Each method and device is described in detail, and its suitability under various conditions is discussed.
对于血吸虫病媒介螺蛳种群的定量研究,无法开发出适用于所有情况的统一方法。调查技术和采样设备的选择取决于研究目的、开展工作的环境、栖息地的性质以及可用资源。用于获得螺蛳种群估计值的各种技术分为两类——直接方法和间接方法。前者涉及从特定栖息地或在特定时间段内收集螺蛳,而后者包括螺蛳标记和棕榈叶诱捕器等技术,在这些技术中,螺蛳不是通过采集者的努力获得的。详细描述了每种方法和设备,并讨论了其在各种条件下的适用性。