Understanding growth relationships of African cymothoid fish parasitic isopods using specimens from museum and field collections
Understanding growth relationships of African cymothoid fish parasitic isopods using specimens from museum and field collections
复制标题
使用博物馆和野外收藏的标本了解非洲拟镰鱼寄生等足类动物的生长关系
DOI：
10.1016/j.ijppaw.2019.02.002
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Nico J. Smit
中科院分区：
文献类型：
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作者：
R. Welicky;W. Malherbe;K. A. Hadfield;Nico J. Smit
胞体等足类是鱼类物种的一组不同的体外寄生虫，特别引人注目，因为它们很大，附着在鱼类宿主的体表、嘴巴和鳃上。这些寄生虫从幼虫到雄性再到雌性的转变，以及它们的大小如何随着个体发育和寄主大小的变化而变化还不是很清楚。为了更好地了解这些关系，从现场和博物馆收集的南非样本的数据被结合在一起，以测试寄主和寄生长度之间的关联，这些寄主和寄生虫的长度分别为3个嘴部和1个鳃室感染属(分别为Ceratothae、Cinusa、Cymothoa和Mothcya)。一般来说，从90 h的博物馆调查中收集的寄生虫数量与7次为期一周的野外收集的寄生虫数量相似。对于三种口腔寄生虫中的两种，雄虫和雌虫的寄生虫和寄主大小显著正相关，但幼虫没有相关性。对于寄生在鳃上的寄生虫，雌雄寄生虫的大小与寄主大小的相关性很弱，且相关性不显著。这些结果首次提供了非洲聚伞动物物种及其鱼类宿主的形态测量数据和生长关系数据，并证明了利用博物馆藏品进行生态研究的价值和效率。
Cymothoid isopods are a diverse group of ectoparasites of fish species, and are particularly conspicuous as they are large and attach to the body surface, mouth, and gill chamber of fish hosts. These parasites transition from juvenile to male to female, and how their size changes with ontogeny and correlates with host size is not well understood. To better understand these relationships, data from field and museum collected samples of South Africa were combined to test for the associations between host and parasite length for three mouth and one gill chamber-infesting genera (Ceratothoa,Cinusa,Cymothoa, andMothocyarespectively). Generally, the number of parasites collected from 90 h of museum surveying was similar to that of seven, one-week long field collections. For two of the three mouth-infesting parasites, parasite and host size were significantly and positively correlated for males and females, but not juveniles. For gill chamber-infesting parasites, female and male parasite sizes were weakly and not significantly correlated with host size. These results provide the first morphometric data and growth relationship data for African cymothoid species and their fish hosts, and demonstrate the value and efficiency of using museum collections in ecological research.