Does mother know best? The preference-performance hypothesis and parent-offspring conflict in aboveground-belowground herbivore life cycles
Does mother know best? The preference-performance hypothesis and parent-offspring conflict in aboveground-belowground herbivore life cycles
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DOI：
10.1111/j.1365-2311.2010.01248.x
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发表时间：
2011-04-01
影响因子：
2.2
通讯作者：
Johnson, Scott N.
中科院分区：
文献类型：
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作者：
Clark, Katherine E.;Hartley, Susan E.;Johnson, Scott N.
2.本研究探讨了影响根食型葡萄象甲幼虫生长发育的因素，以及这些因素是否与地面上的雌成虫产卵行为有关.取食地上部分的母虫使根系生物量减少34%，使根系碳增加4%。幼虫取食植物地上草食动物减少了质量。无论是否存在母体植食性，幼虫质量与根系生物量呈正相关。幼虫质量也减少同种幼虫，以前的根（减少19%）喂养。然而，这种影响的机制尚不清楚，与地上的母体食草动物相反，先前的幼虫喂养并没有显著影响根系生物量或根系碳浓度。母亲的昆虫没有区分感染幼虫的植物和那些没有幼虫的植物，在他们的产卵行为。相反，母体昆虫倾向于在根系较小的植物上产卵，这种行为可能会对后代的表现产生负面影响。PPH是不支持我们的研究结果为多食的葡萄象鼻虫喂养的宿主植物树莓（悬钩子），事实上，我们的研究结果表明，有强大的亲子冲突在这个系统中的潜力。
2. This study investigated the factors influencing the performance of the root-feeding vine weevil (Otiorhynchus sulcatus) larvae and whether this was linked to the oviposition behaviour of the maternal adult living aboveground.3. Maternal insects feeding aboveground reduced root biomass by 34% and increased root carbon by 4%. Larvae feeding on plants subjected to aboveground herbivory had reduced mass. Irrespective of the presence of maternal herbivory, larval mass was positively correlated with root biomass.4. Larval mass was also reduced by conspecific larvae, previously feeding on roots (19% reduction). However, the mechanism underpinning this effect remains unclear, as in contrast to maternal herbivory aboveground, prior larval feeding did not significantly affect root biomass or root carbon concentrations.5. Maternal insects did not distinguish between plants infested with larvae and those that were free of larvae, in terms of their egg-laying behaviour. Conversely, maternal insects tended to lay eggs on plants with smaller root systems, a behaviour that is likely to negatively affect offspring performance.6. The PPH is not supported by our findings for the polyphagous vine weevil feeding on the host plant raspberry (Rubus idaeus), and in fact our results suggest that there is the potential for strong parent-offspring conflict in this system.