长尾红蝇(半翅目:红蝇科)的种群大小调节是通过激惹机制进行的。

IF 2.5 4区 医学 Q2 PARASITOLOGY
Enrique Hector Weir, Jorge Eduardo Rabinovich
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引用次数: 0

摘要

背景:物理因素可以决定丰度,但不能调节其种群密度,天敌也不能。目的:确定与密度依赖的triatomine种群调节相关的过程。方法:设置4个相互连接的箱体进行室内实验;中间的盒子里藏着长毛象虫和一只仓鼠。5期和成虫密度分别为10、20、30、40、60只/只,重复4次(除60只密度外)。测量了仓鼠的烦躁性和几种triatomine反应:摄食、发育时间和寿命、死亡率、繁殖力、分散和净繁殖值(R o)。研究结果:密度对易激惹性有统计学上的显著影响,但对虫子取食的百分比没有影响。密度对没有在盒子之间移动的昆虫摄入的血粉大小有显著影响,但当昆虫移动时不显著。密度和烦躁程度影响5期若虫换壳比例、成虫每天死亡比例和3周内死亡比例。主要结论:我们发现密度依赖的机制,通过宿主的激惹作用,似乎是最合理的调节种群的过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Population size regulation is density-dependent in Rhodnius prolixus (Hemiptera: Reduviidae) through an irritability mechanism.

Population size regulation is density-dependent in Rhodnius prolixus (Hemiptera: Reduviidae) through an irritability mechanism.

Population size regulation is density-dependent in Rhodnius prolixus (Hemiptera: Reduviidae) through an irritability mechanism.

Population size regulation is density-dependent in Rhodnius prolixus (Hemiptera: Reduviidae) through an irritability mechanism.

Background: Physical factors can determine the level of triatomine abundance, but do not regulate their population densities, and neither do natural enemies.

Objectives: To identify the processes associated with density-dependent triatomine population regulation.

Methods: We set-up a laboratory experiment with four interconnected boxes; the central box harbored Rhodnius prolixus bugs and one hamster. Stage 5 and adult densities of 10, 20, 30, 40, and 60 bugs per hamster, were replicated four times (except the density of 60 bugs). Hamster's irritability and several triatomine responses were measured: feeding, development time and longevity, mortality, fecundity, dispersal, and the net reproductive value (R o ).

Findings: Density had a statistically significant effect on irritability, but not on the percent of bugs feeding. Density was significant on blood meal size ingested in bugs that did not move between boxes, but not significant when the bugs moved. Density and irritability affected the proportion of stage 5 nymphs molting, and the proportion of adult bugs dying per day and over a three-week period. There was a highly significant effect of density and irritability on R o .

Main conclusions: We showed that a density-dependent mechanism, acting through the irritability of the host, seems the most plausible process regulating populations in triatomines.

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来源期刊
CiteScore
5.00
自引率
3.60%
发文量
91
审稿时长
3-8 weeks
期刊介绍: Memórias do Instituto Oswaldo Cruz is a journal specialized in microbes & their vectors causing human infections. This means that we accept manuscripts covering multidisciplinary approaches and findings in the basic aspects of infectious diseases, e.g. basic in research in prokariotes, eukaryotes, and/or virus. Articles must clearly show what is the main question to be answered, the hypothesis raised, and the contribution given by the study. Priority is given to manuscripts reporting novel mechanisms and general findings concerning the biology of human infectious prokariotes, eukariotes or virus. Papers reporting innovative methods for diagnostics or that advance the basic research with these infectious agents are also welcome. It is important to mention what we do not publish: veterinary infectious agents research, taxonomic analysis and re-description of species, epidemiological studies or surveys or case reports and data re-analysis. Manuscripts that fall in these cases or that are considered of low priority by the journal editorial board, will be returned to the author(s) for submission to another journal.
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