Intrinsic prey suitability in specialist and generalist Harmonia ladybirds: a test of the trade‐off hypothesis for food specialization
Intrinsic prey suitability in specialist and generalist Harmonia ladybirds: a test of the trade‐off hypothesis for food specialization
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专业和通才瓢虫的内在猎物适宜性：食物专业化权衡假设的检验
DOI：
10.1111/j.1570-7458.2012.01288.x
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发表时间：
2012
影响因子：
1.9
通讯作者：
N. Osawa
中科院分区：
文献类型：
--
作者：
Suzuki Noriyuki;N. Osawa
权衡假说认为，在一种给定资源上性能的提高是以降低其他资源的性能为代价的，这种权衡是捕食者和食草动物食物专业化的驱动力。在这项研究中，我们研究了两种兄弟瓢虫--异色瓢虫Harmonia yedoensis Takizawa和异色瓢虫Harmonia axyridis Pallas(鞘翅目：瓢虫科)的幼虫存活和表现。Harmonia yedosis是一种专业捕食者，主要捕食田间的松蚜，而异色瓢虫是一种多面性捕食者，猎物范围很广。我们在实验室中的实验表明，与其他被捕食物种相比，以松蚜为食的耶多亚夜蛾幼虫的存活率和表现并不高。相反，两种瓢虫的猎物适宜性是相似的，而伊藤夜蛾幼虫在它们从未在自然界中利用的猎物物种上发育得同样好，甚至更好。这些结果表明，寄主范围可能不受蚜虫种类本身的内在适宜性的限制。此外，正如我们之前的研究表明，松蚜是一种高度难以捉摸的猎物，小瓢虫孵化很难捕获，这意味着利用这种猎物的成本很高。因此，我们得出结论，除了猎物适宜性之外，还有其他一些因素导致了观察到的黑斑鱼的食物专门化。
The trade‐off hypothesis posits that increased performance on a given resource comes at the cost of decreased performance on other resources, and that this trade‐off is a driving force of food specialization in both predators and herbivores. In this study, we examined larval survival and performance in two sibling ladybird species, Harmonia yedoensis Takizawa and Harmonia axyridis Pallas (Coleoptera: Coccinellidae), fed on one of four prey species. Harmonia yedoensis is a specialist predator that preys mostly on pine aphids in the field, whereas H. axyridis is a generalist predator with a broad prey range. We experimentally showed in the laboratory that larval survival and performance were not higher when H. yedoensis was fed on pine aphids, compared with the other prey species. Rather, prey suitability was similar in both ladybird species, and H. yedoensis larvae developed as well or even better on prey species that they never utilize in nature. These results suggest that the host range in H. yedoensis may not be limited by the intrinsic suitability of the aphid species per se. Moreover, as shown by our previous study, the pine aphid is a highly elusive prey that is difficult for small ladybird hatchlings to capture, which means that the cost of utilizing this prey is high. Therefore, we conclude that some factor other than prey suitability is responsible for the observed food specialization in H. yedoensis.
影响因子：
2.7
作者：
Yasuda, H;Evans, EW;Takizawa, T
通讯作者：
Takizawa, T
影响因子：
3.8
作者：
G. Turner
通讯作者：
G. Turner
瓢虫异色瓢虫通过兄弟姐妹同类相食进行的母性投资：卵大小的作用
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
Fujii;K.;Wakahara;C.;Tanimura;A.;Moteki;M.;古賀章彦（京都大・霊長研），原暢（京都大・霊長研），Israt Jahan（京都大・霊長研），平井百合子（京都大・霊長研），平井啓久（京都大・霊長研）;Osawa N.
通讯作者：
Osawa N.