Aggressive hosts are undeterred by a cuckoo's hawk mimicry, but probably make good foster parents.
Aggressive hosts are undeterred by a cuckoo's hawk mimicry, but probably make good foster parents.
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DOI：
10.1098/rspb.2022.1506
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发表时间：
2023-01-11
影响因子：
4.7
通讯作者：
Spottiswoode, Claire N.
中科院分区：
文献类型：
--
作者：
Attwood, Mairenn C.;Lund, Jess;Nwaogu, Chima J.;Moya, Collins;Spottiswoode, Claire N.
如果最高质量的宿主也最能抵抗剥削，寄生虫就面临着权衡。对于育雏寄生虫，防御良好的宿主巢可能既难以寄生，也难以捕食，导致寄生小鸡更好的生存。这种权衡可能会加剧，如果育雏寄生的适应，以减少主机的前线防御，如模仿鹰的杜鹃，不阻止主机积极暴徒猛禽。在这里，我们调查的成本和效益，非洲杜鹃（Cuculus gularis）专门对一个高度侵略性的宿主物种，叉尾卷尾（Dicrurus adsimilis）。田间实验表明，drongos强烈攻击和围攻杜鹃和鹰模型，这意味着鹰模仿不阻止前线防御非洲杜鹃。对布谷鸟和鹰模型的攻击在卵期后普遍下降，但对蛇模型的攻击急剧增加，这表明卷尾雁可能更像对待布谷鸟而不是捕食者。我们认为，杜鹃寄生一个侵略性的主机的成本可能会减轻随后的利益，他们的后代，因为drongo巢生存比其他物种的巢具有类似的筑巢生态。这些结果表明，宿主质量和易感性之间的权衡育雏寄生虫。
Parasites face a trade-off if the highest quality hosts are also most resistant to exploitation. For brood parasites, well-defended host nests may be both harder to parasitize and harder to predate, leading to better survival of parasitic chicks. This trade-off could be accentuated if brood-parasitic adaptations to reduce front-line defences of hosts, such as mimicry of hawks by Cuculus cuckoos, do not deter hosts which aggressively mob raptors. Here we investigate the costs and benefits to the African cuckoo (Cuculus gularis) of specializing on a highly aggressive host species, the fork-tailed drongo (Dicrurus adsimilis). Field experiments showed that drongos strongly attacked and mobbed both cuckoo and hawk models, implying that hawk mimicry does not deter front-line defences against African cuckoos. Attacks on cuckoo and hawk models generally declined after the egg stage but attacks on snake models sharply increased, suggesting drongos may treat hawks more like cuckoos than predators. We suggest that the cost to cuckoos of parasitizing an aggressive host may be alleviated by subsequent benefits to their offspring, since drongo nests survived better than nests of other species with similar nesting ecology. These results are indicative of a trade-off between host quality and susceptibility for a brood parasite.
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DOI：
10.1098/rspb.2015.0795
发表时间：
2015-07-07
期刊：
Proceedings. Biological sciences
影响因子：
--
作者：
Feeney WE;Troscianko J;Langmore NE;Spottiswoode CN
通讯作者：
Spottiswoode CN
影响因子：
2.9
作者：
Bize, Pierre;Jeanneret, Caroline;Roulin, Alexandre
通讯作者：
Roulin, Alexandre
影响因子：
2.5
作者：
DAVIES, NB;BROOKE, MD
通讯作者：
BROOKE, MD
影响因子：
2.1
作者：
DUCKWORTH, JW
通讯作者：
DUCKWORTH, JW
影响因子：
2.4
作者：
Campobello, Daniela;Sealy, Spencer G.
通讯作者：
Sealy, Spencer G.