Measurements of cnidae from sea anemones (Cnidaria: Actiniaria), II: further studies of differences amongst sample means and their taxonomic relevance
Measurements of cnidae from sea anemones (Cnidaria: Actiniaria), II: further studies of differences amongst sample means and their taxonomic relevance
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海葵中刺胞动物的测量（刺胞动物门：海葵），II：样本平均值差异及其分类相关性的进一步研究
DOI：
10.3989/scimar.1998.62n4361
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
R. Williams
中科院分区：
文献类型：
--
作者：
R. Williams
本文报道了海葵科（Cnidae）的幼虫，分别采自老年海葵（Metridium senile Linnaeus）、长柄海葵（Cereus pedunculatus Pennant）、秀丽海葵（Sagartia elegans Dalyell）、穴居海葵（Sagartia troglodytes Price）、花侧海葵（Anthopleura thallia Gosse）和马荨麻（Urticina eques Gosse）的新鲜组织（触角、触须或柱状）。计算每个样本的均值、众数、中位数、标准差、方差、变异系数、最小值、最大值和极差。Leparin的pasticocysts（basitrichs和microbasic p-mastigophores）和spirocysts有正常（高斯）的频率分布，并没有重要的样本内变异。一个样本之间（相同的标本）的差异检测到的平均长度之间的微碱性p-mastigophores从乌头在Sagartiaelegans。种内（标本间）之间的差异，从柱外胚层basitrichs的平均长度之间检测到四个标本的马，和微碱性p-mastigophores的平均长度之间发生的差异，从acontia的两个标本Sagartia elegans。然而，对于每个物种U. eques和S. elegans，有没有直接的相关性之间的大小海葵检查和平均长度的海葵囊。总体而言，结果证实，刺胞体的大小，在隔离时，是不是一个可靠的海葵的分类特征。对于其他目的，平均刺胞测量可能是有用的，并建议快速样本范围测试，以分析它们之间的差异。方法也提出了估计的平均值和标准偏差的出版物中的数据，只提供范围内的刺胞纲的大小和测量的刺胞纲的数量。本结果和结论补充了威廉姆斯（1996，Scientia Marina，60：339-351）的结果和结论。
Lengths of cnidae, sampled from fresh tissue (tentacles, acontia or column) from the sea anemones Metridium senile (Linnaeus), Cereus pedunculatus (Pennant), Sagartia elegans (Dalyell), Sagartia troglodytes (Price), Anthopleura thallia (Gosse) and Urticina eques (Gosse), were measured. The mean, mode, median, standard deviation, variance, coefficient of variation, minimum, maximum and range of each sample were calculated. Lengths of nematocysts (basitrichs and microbasic p-mastigophores) and spirocysts had normal (Gaussian) frequency distributions, and there was no important within-sample variability. A between-sample (same specimen) difference was detected between mean lengths of microbasic p-mastigophores from acontia in Sagartia elegans. Intraspecific (between-specimen) differences amongst mean lengths of basitrichs from column ectoderm were detected amongst four specimens of Urticina eques, and a difference occurred between the mean lengths of microbasic p-mastigophores from the acontia of two specimens of Sagartia elegans. However, for each of the species U. eques and S. elegans, there was no direct correlation between the sizes of the anemones examined and the mean lengths of their nematocysts. Overall, the results confirm that cnida size, when taken in isolation, is not a reliable taxonomic character for sea anemones. For other purposes, mean cnida measurements may be useful and a rapid sample range test is suggested for analysing differences between them. Methods are also presented for estimating means and standard deviations from data in publications that provide only ranges of cnida sizes and the number of cnidae measured. The present results and conclusions supplement those of Williams (1996, Scientia Marina, 60: 339-351).