The consequences of alternating diet on performance and food preferences of a specialist leaf beetle.
The consequences of alternating diet on performance and food preferences of a specialist leaf beetle.
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交替饮食对专业叶甲虫的性能和食物偏好的影响
DOI：
10.1016/j.jinsphys.2013.05.009
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发表时间：
2013
影响因子：
2.2
通讯作者：
Müller C
中科院分区：
文献类型：
--
作者：
Tremmel M;Müller C
寄主植物组织的食物品质会影响草食动物的生产性能，也可能影响其偏好行为。由于营养成分和防御代谢物浓度在植物的不同部分之间可能会有显着差异，并随着时间的推移而变化，食草动物即使在以单一植物个体为食时，也可能面临质量不同的饮食。在这里，我们调查了在何种程度上专门喂养无论是年轻或老，成熟的叶片ofBrassica rapaor的混合饮食的年轻和老叶交替顺序提供影响幼虫的性能，食物消耗，和主机的偏好行为的成年芥菜叶甲，Phaedon cochleariae。分析不同的叶片质量性状，我们发现较低的水分含量，C：N比没有变化，但三倍以上的硫代葡萄糖苷浓度相比，老叶年轻。用混合饲料饲养的个体表现与用嫩叶饲养的动物一样好。因此，与只吃高营养嫩叶的动物相比，混合饮食的个体可以通过稀释不利的次级代谢物来平衡较低的营养摄入量。或者，他们可能会整合其食物的变化，在稀缺的时候使用以前同化的资源进行生长。动物饲养的老叶增长较少，并延长了幼虫发育时间，虽然他们表现出消费增加，表明补偿性喂养。此外，我们发现，对某种饮食的经验会影响偏好行为。而个人饲养专上嫩叶喜欢年轻的老叶喂养和产卵，我们没有发现任何偏好的动物饲养专上老叶或交替饮食饲养的女性。因此，与幼叶饲养的动物的正反馈相反，饮食混合个体的综合生长可能导致发育过程中缺乏反馈。两者合计，我们的研究结果表明，不同的饮食制度可以导致芥菜甲虫的性能相当，但经验丰富的反馈可能会有所不同，从而传达不同的饮食偏好。
The food quality of a given host plant tissue will influence the performance and may also affect the preference behavior of herbivorous animals. As nutrient contents and defense metabolite concentrations can vary significantly between different parts of a plant and change over time, herbivores are potentially confronted with diet differing in quality even when feeding on a single plant individual. Here we investigated to what extent feeding exclusively either on young or old, mature leaves ofBrassica rapaor on a mixed diet of young and old leaves offered in alternating order affects the larval performance, food consumption, and the host preference behavior of adult mustard leaf beetles,Phaedon cochleariae. Analyzing different leaf quality traits, we found lower water contents, no changes in C:N ratio but more than threefold higher glucosinolate concentrations in young compared to old leaves. Individuals reared on mixed diet performed as well as animals reared on young leaves. Thus, compared to animals feeding exclusively on highly nutritious young leaves, diet-mixing individuals may balance the lower nutrient intake by a dilution of adverse secondary metabolites. Alternatively, they may integrate over the variation in their food, using a previously assimilated resource for growth at times of scarcity. Animals reared on old leaves grew less and had a prolonged larval developmental time, although they showed increased consumption indicating compensatory feeding. Additionally, we found that experience with a certain diet affected the preference behavior. Whereas individuals reared exclusively on young leaves preferred young over old leaves for feeding and oviposition, we did not find any preferences by animals reared exclusively on old leaves or by females reared on alternating diet. Thus, in contrast to positive feedbacks for animals reared on young leaves, an integrative growth of diet-mixing individuals potentially leads to a lack of feedback during development. Taken together, our results suggest that different diet regimes can lead to comparable performance of mustard leaf beetles but experienced feedbacks may differ and thus convey distinct diet preferences.
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影响因子：
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作者：
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DOI：
--
发表时间：
2006
期刊：
影响因子：
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作者：
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