Mohammed Ryan S, King Stanley D, Bentzen Paul, Marcogliese David, van Oosterhout Cock, Lighten Jackie
Department of Life Sciences, The University of the West Indies, St Augustine, Trinidad and Tobago.
Biology Department, Dalhousie University, 1355 Oxford Street, Halifax, Nova Scotia, Canada B3H4R2.
R Soc Open Sci. 2020 Jan 22;7(1):191112. doi: 10.1098/rsos.191112. eCollection 2020 Jan.
The guppy () is a model species in ecology and evolution. Many studies have examined effects of predators on guppy behaviour, reproduction, survival strategies, feeding and other life-history traits, but few have studied variation in their parasite diversity. We surveyed parasites of 18 Trinidadian populations of guppy, to provide insight on the geographical mosaic of parasite variability, which may act as a source of natural selection acting on guppies. We found 21 parasite species, including five new records for Trinidad. Spatial variation in parasite diversity was significantly higher than that of piscine predators, and significant variation in parasite richness among individuals and populations was correlated with: (i) host size, (ii) snail species richness, and (iii) the distance between populations. Differences in parasite species richness are likely to play an important, yet underestimated role in the biology of this model species of vertebrate ecology and evolution.
孔雀鱼（）是生态学和进化领域的模式物种。许多研究探讨了捕食者对孔雀鱼行为、繁殖、生存策略、觅食及其他生活史特征的影响，但很少有研究关注其寄生虫多样性的变化。我们调查了特立尼达岛18个孔雀鱼种群的寄生虫，以深入了解寄生虫变异性的地理镶嵌情况，这可能是作用于孔雀鱼的自然选择来源。我们发现了21种寄生虫，其中包括特立尼达岛的5个新记录。寄生虫多样性的空间变异显著高于鱼类捕食者，个体和种群间寄生虫丰富度的显著变异与以下因素相关：（i）宿主大小，（ii）蜗牛物种丰富度，以及（iii）种群间距离。寄生虫物种丰富度的差异可能在这个脊椎动物生态学和进化模式物种的生物学中发挥重要但被低估的作用。
