食谱多样化与黄鹂和虹鳟共存的相关性:猎物转换和群内捕食

IF 4.3 1区 农林科学 Q1 ENTOMOLOGY
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引用次数: 0

摘要

摘要 杂食动物从一个以上的营养级获取资源,根据数量和质量选择食物。当猎物稀少时,它们通常会进行体内捕食(IGP)。黄鹂(Orius laevigatus)是杂食性动物的一个例子,当它们被释放到一个组合系统中,在低水平的首选猎物蓟马(Frankliniella occidentalis)条件下,黄鹂会成为捕食螨Amblyseius swirskii的高级捕食者。在这里,我们测试了两个基因增强的 O. laevigatus 品系(分别为 BIG30 和 2POL-11),这两个品系体型更大,以花粉为食的适应性更好,因此食性更多样化,我们希望通过与 O. laevigatus 的商业种群进行比较,阐明其对猎物偏好和捕食螨 IGP 的潜在影响。为此,在实验室条件下,根据不同的蓟马成虫供应率,对植物螨成虫的捕食率进行了记录。我们还研究了花粉作为补充食物对 IGP 和猎物偏好的影响。我们发现,与商业种群相比,我们的两个强化品系杀死的捕食性螨虫数量减少了 9%,并且更喜欢捕食成蓟马。BIG30 的总捕食率明显更高,杀死的蓟马成虫比 BIG30 多 150%,而 2POL-11 则被定义为资源的有效利用者,可在不同的猎物和花粉之间切换,显示出较低的 IGP。补充花粉对降低 IGP 有显著影响,但只有 2POL-11 对猎物偏好的影响显著。此外,还讨论了种内捕食理论以及猎物转换对食物网和生物控制策略的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Relevance of diet diversification in the coexistence between Orius laevigatus and Amblyseius swirskii: prey switching and intraguild predation

Abstract

Omnivores obtain resources from more than one trophic level, choosing food based on quantity and quality. They usually engage in intraguild predation (IGP) when prey is scarce. Orius laevigatus is an example of omnivore that becomes superior predator of the predatory mite Amblyseius swirskii when released in a combined system under low levels of the preferred prey, the thrips Frankliniella occidentalis. Here, we test two genetically enhanced O. laevigatus strains for bigger size and better fitness feeding on pollen (BIG30 and 2POL-11, respectively), hence with a wider dietary diversification, to elucidate the potential effects on prey preference and IGP on the predatory mite, in comparison with a commercial population of O. laevigatus. To do that, predation rates were registered on adult phytoseiids solely or in a choice situation at different availability ratios of adult thrips under laboratory conditions. The effect of pollen as supplemental food on IGP and prey preference was examined, too. We found that our two enhanced lines killed up to 9% less predatory mites and fed preferably on adult thrips, compared to the commercial population. While BIG30 showed a significantly higher total predation rate, killing up to 150% more adult thrips, 2POL-11 is defined as an efficient user of resources, switching between different prey and pollen showing low IGP. Pollen supplementation had a significant effect on reducing IGP, but only for 2POL-11 the influence on prey preference was significant. The theory of intraguild predation and the impact of prey switching on food webs and biological control strategies are also discussed.

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来源期刊
Journal of Pest Science
Journal of Pest Science 生物-昆虫学
CiteScore
10.40
自引率
8.30%
发文量
114
审稿时长
6-12 weeks
期刊介绍: Journal of Pest Science publishes high-quality papers on all aspects of pest science in agriculture, horticulture (including viticulture), forestry, urban pests, and stored products research, including health and safety issues. Journal of Pest Science reports on advances in control of pests and animal vectors of diseases, the biology, ethology and ecology of pests and their antagonists, and the use of other beneficial organisms in pest control. The journal covers all noxious or damaging groups of animals, including arthropods, nematodes, molluscs, and vertebrates. Journal of Pest Science devotes special attention to emerging and innovative pest control strategies, including the side effects of such approaches on non-target organisms, for example natural enemies and pollinators, and the implementation of these strategies in integrated pest management. Journal of Pest Science also publishes papers on the management of agro- and forest ecosystems where this is relevant to pest control. Papers on important methodological developments relevant for pest control will be considered as well.
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