Cirino Bruna Silva, Costa Neto Sócrates Fraga da, Cardoso Thiago Dos Santos, Maldonado Júnior Arnaldo, Gentile Rosana
Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios, Instituto Oswaldo Cruz, Fundação Oswaldo, Av. Brasil, 4365, 21040-360, Rio de Janeiro, RJ, Brazil.
Programa de Pós-Graduação em Biodiversidade e Saúde, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av. Brasil, 4365, 21040-360, Rio de Janeiro, RJ, Brazil.
Int J Parasitol Parasites Wildl. 2025 May 6;27:101077. doi: 10.1016/j.ijppaw.2025.101077. eCollection 2025 Aug.
Parasite species richness can be influenced by intrinsic and extrinsic factors of their hosts, such as host body size and latitude. Although these factors have been studied for several taxa, few studies have investigated them for helminths of wild mammals. The aim of this study was to evaluate the influence of host body size, body weight and latitude on the species richness and abundance of the helminths of and Data on helminths and the geographic coordinates of the collection localities of the hosts were obtained from the Collection of Wild Mammal Reservoirs and the database of the Laboratory of Biology and Parasitology of Wild Mammal Reservoirs. The influences of latitude and host body size and body weight on helminth species richness (HSR) and helminth abundance were analysed using linear regressions. We evaluated the effect of latitude on helminth species composition using redundancy analysis followed by ANOVA. The HSR ranged from 1 to 9 for and from 1 to 7 for . We found a positive relationship between latitude and total HSR for ( = 0.012). The ANOVA revealed the influence of latitudinal variation on the species composition variation of helminths only for ( = 0.001). With respect to body size, we did not find a significant relationship between this variable and HSR or abundance for either species. However, we found a positive relationship between host body weight and helminth abundance for ( = 0.004). We conclude that the increase in latitude was an explanatory factor for the increasing HSR along infracommunities, contradicting the general pattern of increasing species with decreasing latitude observed in free-living species. Moreover, host intrinsic factors may be more relevant to endoparasite occurrence and development than latitude because they directly influence the parasite niche.
寄生虫物种丰富度会受到其宿主的内在和外在因素影响，如宿主体型大小和纬度。尽管针对多个分类群对这些因素进行了研究，但很少有研究针对野生哺乳动物的蠕虫进行调查。本研究的目的是评估宿主体型大小、体重和纬度对[具体两种动物名称未给出]蠕虫物种丰富度和丰度的影响。关于蠕虫的数据以及宿主采集地点的地理坐标是从野生哺乳动物宿主库和野生哺乳动物宿主生物学与寄生虫学实验室数据库中获取的。使用线性回归分析了纬度、宿主体型大小和体重对蠕虫物种丰富度（HSR）和蠕虫丰度的影响。我们使用冗余分析并随后进行方差分析来评估纬度对蠕虫物种组成的影响。[具体两种动物名称未给出]的HSR范围为1至9，[另一种动物名称未给出]的HSR范围为1至7。我们发现[具体动物名称未给出]的纬度与总HSR之间存在正相关关系（P = 0.012）。方差分析显示，仅对于[具体动物名称未给出]，纬度变化对蠕虫物种组成变化有影响（P = 0.001）。关于体型大小，我们未发现该变量与任何一种物种的HSR或丰度之间存在显著关系。然而，我们发现[具体动物名称未给出]的宿主体重与蠕虫丰度之间存在正相关关系（P = 0.004）。我们得出结论，纬度的增加是沿小群落HSR增加的一个解释因素，这与在自由生活物种中观察到的物种随纬度降低而增加的一般模式相矛盾。此外，宿主内在因素可能比纬度与体内寄生虫的发生和发育更相关，因为它们直接影响寄生虫生态位。
