泰国的东方栉水母和长尾栉水母:按物种、性别和地域划分的头部几何形状。

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY Medical and Veterinary Entomology Pub Date : 2024-01-31 DOI:10.1111/mve.12707
Kruawan Chotelersak, Srisombat Puttikamonkul, Yudthana Samung, Tanawat Chaiphongpachara, Jean-Pierre Dujardin, Suchada Sumruayphol
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引用次数: 0

摘要

栉水母属跳蚤是细菌、立克次体、原生动物和蠕虫等微生物的生物载体或中间宿主。栉头蚤分布于世界各地,而东方栉头蚤一直被认为是亚洲栉头蚤的一个亚种。为了帮助识别这两个物种并进一步探讨它们之间的差异,我们对头部采用了几何形态计量学方法。我们对两种雌雄动物都进行了检查。我们使用了头部的五个解剖标志,并添加了 10 个半标志以捕捉前头部的弧度。仅考虑地标与结合半地标时,物种分类的准确性存在一致的差异,这表明头部曲线作为分类信号的重要性。在重新分类分析中,无论是否使用标签,头部形状本身都能几乎完美地识别两种雌雄动物,即使在调整了先验概率之后也是如此。同样的方法揭示了这两个物种在性别大小和形状上的高度二态性。在雌雄动物之间,体型变化对形状识别的贡献(从 27% 到 45%)要比物种之间的贡献(从 0.7% 到 7.1%)大得多。尽管如此,在我们的数据中,体型从来都不能可靠地识别个体的性别,更不用说物种了。头形的地理差异只能在东方鸦科样本中进行研究。没有发现形态变化与地理环境有明显的相关性,这与泰国各府之间的基因流动是一致的。跳蚤头部的几何形态计量学方法,如能结合头部曲线,将是快速、经济和准确鉴定物种和性别的有效工具。因此,它是未来流行病学和人口学研究的有用工具。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Ctenocephalides orientis and Ctenocephalides felis in Thailand: Head geometry by species, sex and geography

Fleas in the genus Ctenocephalides serve as biological vectors or intermediate hosts of microorganisms such as bacteria, rickettsia, protozoa and helminths. Ctenocephalides felis has a worldwide distribution, while C. orientis has long been considered as a subspecies of C. felis in Asia. To help the morphological recognition of these two species and further explore their differences, we used the geometric morphometric approach applied to the head. Both sexes were examined. Five anatomical landmarks of the head were used, and to capture the curvature of the front head, 10 semilandmarks were added. There was a consistent difference in species classification accuracy when considering landmarks only versus their combination with semilandmarks, suggesting the importance of the curve of the head as a taxonomic signal. Using or not the labels in the reclassification analyses, the head shape allowed by itself almost perfect recognition of the two species, in both sexes, even after adjustment for prior probabilities. The same approach disclosed a high level of sexual size and shape dimorphism in both species. The contribution of size variation to the discrimination by shape was much more important between sexes (from 27% to 45%) than between species (from 0.7% to 7.1%). Nevertheless, in our data, size never could represent a way to reliably recognise the sex of an individual, even less its species. Geographical variation in head shape could only be explored for the C. orientis sample. No significant correlation of morphometric variation with geography could be detected, which would be consistent with gene flow between Thai provinces. The geometric morphometric approach of the flea head, when it incorporates head curves, is a promising tool for rapid, economical, and accurate species and sex identification. It is, therefore, a useful tool for future epidemiological and demographic studies.

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来源期刊
Medical and Veterinary Entomology
Medical and Veterinary Entomology 农林科学-昆虫学
CiteScore
3.70
自引率
5.30%
发文量
65
审稿时长
12-24 weeks
期刊介绍: Medical and Veterinary Entomology is the leading periodical in its field. The Journal covers the biology and control of insects, ticks, mites and other arthropods of medical and veterinary importance. The main strengths of the Journal lie in the fields of: -epidemiology and transmission of vector-borne pathogens changes in vector distribution that have impact on the pathogen transmission- arthropod behaviour and ecology- novel, field evaluated, approaches to biological and chemical control methods- host arthropod interactions. Please note that we do not consider submissions in forensic entomology.
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Issue Information Environmental determinants of West Nile virus vector abundance at the wildlife-livestock interface. Wild birds as hosts of ticks (Acari: Ixodidae) and Anaplasmataceae (Rickettsiales) in the Atlantic rainforest ecoregion, Argentina. Culicoides biting midges in urban areas of northern Spain. Diversity of lice and flea- and lice-borne pathogens in free-ranging dogs in Uzbekistan.
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