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首页> 外文期刊>Parasitology >Positive co-occurrence of flea infestation at a low biological cost in two rodent hosts in the Canary archipelago.
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Positive co-occurrence of flea infestation at a low biological cost in two rodent hosts in the Canary archipelago.

机译：在加那利群岛的两只啮齿动物宿主中，以较低的生物成本积极共存跳蚤侵扰。

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摘要

Non-random assemblages have been described as a common pattern of flea co-occurrence across mainland host species. However, to date, patterns of flea co-occurrence on islands are unknown. The present work investigates, on one hand, whether the decrease in the number of species on islands affects the pattern of flea co-occurrence, and on the other hand, how the cost of higher flea burdens affects host body mass. The study was carried out in the Canary Islands (Spain) using null models to analyse flea co-occurrence on Rattus rattus and Mus musculus. Results supported aggregation of flea species in Mus but not in Rattus, probably due to the relationship between abundance and both prevalence and intensity of infection of the main flea species parasitizing Mus. In addition, heavy individuals of both rodent species showed the highest flea burdens as well as higher species richness, probably due to the continued accumulation of fleas throughout life and/or immunological resistance mechanisms. Whatever the mechanisms involved, it is clear that co-occurrence and high parasite intensities do not imply a detrimental biological cost for the rodents of the Canary Islands.
机译：非随机组合已被描述为跨大陆宿主物种跳蚤共现的常见模式。然而，迄今为止，岛上跳蚤共生的模式尚不清楚。当前的工作一方面调查岛屿上物种数量的减少是否会影响跳蚤的共生方式，另一方面调查较高的跳蚤负担的成本如何影响宿主体重。该研究在加那利群岛（西班牙）进行，使用空模型分析了褐家鼠和小家鼠的跳蚤共现现象。结果支持了Mus中的跳蚤物种聚集，但不支持Rattus中的跳蚤物种聚集，这可能是由于丰度与寄生于Mus的主要跳蚤物种的感染率和感染强度之间的关系所致。另外，两种啮齿动物物种的重个体都显示出最高的跳蚤负担以及更高的物种丰富度，这可能是由于跳蚤在整个生命和/或免疫抵抗机制中的持续积累所致。不管涉及哪种机制，很明显共生和高寄生虫强度并不意味着加那利群岛啮齿动物的生物学损失。

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