Measuring Abundance of Juvenile Abalone, Haliotis rubra Leach (Gastropoda : Haliotidae); Comparison of a Novel Method with Two Other Methods
Measuring Abundance of Juvenile Abalone, Haliotis rubra Leach (Gastropoda : Haliotidae); Comparison of a Novel Method with Two Other Methods
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测量幼鲍、红鲍（腹足纲：鲍科）的丰度；
DOI：
10.1071/mf9880331
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发表时间：
1988
影响因子：
1.8
通讯作者：
Mg Smith
中科院分区：
文献类型：
--
作者：
P. McShane;Mg Smith
本文介绍了一种适用于结构复杂的近岸生物礁的水下文丘里抽吸取样器。幼鲍的捕捞估计从与吸采样器收集的样品，这是比较，在同一时间通过其他两种方法，麻醉方法和搜索方法获得的估计。1987年1月，在Sandpatch Point（澳大利亚东南部），平均数（s.e.）阁下于每平方米基质的红度为68.7（s.e.，39.2）通过抽吸法，25.6（s.e.，16.1）通过麻醉方法和7.7（s.e.，3.0)通过搜索方法。在申克角附近，相应的数字是1.3（s.e.，0.5），1.2（s.e.，0.5)和零。在Sandpatch Point附近的种群中发现的青少年大小范围（430-1020 µm）与最近定居的H一致。红宝石。吸力法有三个主要优点，其他两种方法：不像麻醉技术，它是不具破坏性的，并不限于可移动的基板;它是很容易适用于大多数珊瑚礁substrata由一个潜水员花费相对较少的时间在水下;采样器是足够强大的，以消除所有少年鲍鱼从礁石表面。
An underwater venturi-suction sampler is described, suitable for sampling fauna on structurally-complex sublittoral reefs. Abundance of juvenile Haliotis rubra was estimated from the samples collected with the suction sampler; this was compared with estimates obtained at the same time by two other methods, an anaesthetic method and a searching method. Off Sandpatch Point (south-eastern Australia) during January 1987, the mean number (s.e.) of H. rubra per square metre of substrate was 68.7 (s.e., 39.2) by the suction method, 25.6 (s.e., 16.1) by the anaesthetic method and 7.7 (s.e., 3.0) by the searching method. Off Cape Schanck, the respective numbers were 1.3 (s.e., 0.5), 1.2 (s.e., 0.5) and nil. Juveniles found in the population off Sandpatch Point were of a size range (430-1020 µm) consistent with recent settlement of H. rubra. The suction method has three main advantages over the other two methods: unlike the anaesthetic technique it is not destructive and is not restricted to removable substrate; it is readily applied to most reef substrata by one diver spending relatively little time under water; and the sampler is sufficiently powerful to remove all juvenile abalone from the reef surface.