Does malaria infection increase the risk of predation-related mortality during bird migration?

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2024-11-08 DOI:10.1016/j.isci.2024.111358

Laura Gangoso , Claudia Santamaría-Cervantes , Josué Martínez-de la Puente , María José Ruiz López , Jordi Figuerola

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Abstract

The migratory culling hypothesis posits that infected individuals are less likely to survive long-distance migration due to physiological and behavioral effects, but this lacks empirical evidence. Here, we tested this hypothesis by sampling 357 passerines from 11 species during their autumn migration to wintering grounds in two different areas, i) at a stopover in southern Spain, and ii) in the Canary Islands, where they were drifted and preyed upon by Eleonora’s falcons while en route to the southern Sahara. Molecular detection of infections by Plasmodium, Haemoproteus, and Leucocytozoon was conducted on bird samples. A higher prevalence of both Plasmodium and Haemoproteus was observed in birds preyed upon by falcons. While a complete understanding of the mechanistic effects of haemosporidian infections on migration performance needs experimental validation, our approach suggests that infection reduces migration success by increasing mortality due to route deviations and/or predation.

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疟疾感染是否会增加鸟类迁徙过程中与捕食相关的死亡风险？

迁徙剔除假说认为，由于生理和行为的影响，受感染的个体不太可能在长途迁徙中存活下来，但这一假说缺乏经验证据。在这里，我们对秋季迁徙到两个不同地区越冬的 11 个物种的 357 只鸟类进行了采样，从而验证了这一假说，这两个地区分别是：i) 西班牙南部的一个中转站；ii) 加那利群岛，它们在那里漂流，并在前往撒哈拉南部的途中被埃莱奥诺拉猎鹰捕食。对鸟类样本进行了疟原虫、血吸虫和白细胞虫感染的分子检测。在猎鹰捕食的鸟类中，疟原虫和血包虫的感染率都较高。虽然血孢子虫感染对迁徙表现的机理影响还需要实验验证，但我们的方法表明，感染会增加因路线偏离和/或捕食造成的死亡率，从而降低迁徙成功率。

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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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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