Chronic coccidian infestation compromises flight feather quality in house sparrows Passer domesticus
Chronic coccidian infestation compromises flight feather quality in house sparrows Passer domesticus
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慢性球虫感染会损害家麻雀的飞行羽毛质量
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Attila Marton
中科院分区：
文献类型：
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作者：
P. L. Pap;C. I. Vágási;Lőrinc Bărbos;Attila Marton
寄生虫在换羽期间侵占鸟类不可或缺的资源，这与寄生在宿主肠道的寄生虫特别相关。这可能会损害对营养要求很高的换羽，从而影响羽毛的功能。尽管较低的羽毛质量对剩余健康有深刻和多方面的不利影响，但令人惊讶的是，关于寄生虫对羽毛特征的影响，特别是在较长时间内，人们知之甚少。我们进行了一项鸟类实验，给一组自然感染的家雀中的一半用药对抗肠道球虫，持续15个月，持续两次婚后蜕皮，而另一半保持感染(即不用药)。与药物组相比，球虫感染对第二次蜕皮期的尾咽腺的大小有显著的负面影响。此外，未用药的雌鸟在二次换羽后的翅膀长度明显短于用药的雌鸟，这表明球虫的负面影响只有在长期暴露于寄生虫感染后才会显现。在第一次和第二次换羽后，从大量的羽毛特征中可以看出，非用药的鸟类的飞行羽毛质量较差。在非药物鸟的情况下，初级羽毛更轻、更短，叶片面积更小，轴更细，僵硬程度降低，尽管羽枝和小羽枝密度较高，但这可能会通过降低飞行成绩而对健康产生各种后果。我们的发现表明，除了众所周知的对寄主繁殖成功的直接影响外，寄生虫还可能通过影响寄主的羽毛质量，最终影响寄主的健康，产生严重的、长期的影响。
Parasites usurp indispensable resources for birds during a moult, and this is particularly relevant for those parasites residing in host intestines. This might compromise the nutritionally demanding moult and, thus, feather functionality. Although lower feather quality has profound and multifaceted adverse effects on residual fitness, surprisingly, little is known about parasites' effect on feather traits, especially over the longer term. We conducted an aviary experiment by medicating half of a group of naturally infested house sparrows Passer domesticus against intestinal coccidians for 15 months, spanning two consecutive postnuptial moults, whereas the other half was kept infested (i.e. without medication). Coccidian infestation significantly and negatively affected the size of the uropygial gland during the second moulting period compared to the medicated group. Furthermore, wing length was significantly shorter after the second moulting in the non-medicated compared to the medicated female birds, which indicates that the negative effects of coccidians emerge only after a prolonged exposure to parasite infestation. Non-medicated birds grew poorer quality flight feathers detected in a large number of feather traits both after the first and second moults. In the case of non-medicated birds, the primaries were lighter and shorter, and had a smaller vane area, thinner rachis and decreased stiffness, although a higher barb and barbule density, which may have various consequences for fitness through reducing flight performance. Our findings demonstrate that, besides the well-known immediate consequences for host breeding success, parasites might also have serious, long-lasting effects through influencing feather quality and, ultimately, fitness of the host. © 2013 The Linnean Society of London
DOI：
10.1016/j.cbpa.2005.07.014
发表时间：
2005-09-01
影响因子：
2.3
作者：
Romero, LM;Strochlic, D;Wingfield, JC
通讯作者：
Wingfield, JC