Effects of diet on female fecundity and larval development in the carrion beetle Necrophila japonica
Effects of diet on female fecundity and larval development in the carrion beetle Necrophila japonica
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饮食对腐肉甲虫 Necrophila japonica 雌性繁殖力和幼虫发育的影响
DOI：
10.1111/eea.12758
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发表时间：
2019
影响因子：
1.9
通讯作者：
Koji SASAKAWA
中科院分区：
文献类型：
--
作者：
Yohei WATAHIKI;Koji SASAKAWA
食腐甲虫亚科Silphinae（鞘翅目：Silphidae）是温带土壤生态系统中的主要大型无脊椎动物。然而，它们的食性决定了每个物种在生态系统中的作用，尚未得到充分的研究。此外，虽然饮食的转变，从对脊椎动物尸体的捕食性无脊椎动物的捕食是已知的发生在这个亚科，这种转变的过程和机制也没有得到充分的解决。我们研究了女性生殖力和幼虫发育的各种饮食中的Silphinae种，Necrophila（Eusilpha）japonica（Motschulsky）。实验饮食包括肉类饮食和各种无脊椎动物的饮食，反映了“祖先”的饮食习惯在Silphinae，尸食性，和“衍生”的饮食习惯，捕食性喂养。女性生殖力显着较高的肉类饮食（牛肉末）比昆虫幼虫饮食（粉虫和双翅目幼虫），但没有显着差异，从一个昆虫的饮食。幼虫的发育性能显着高于肉类和昆虫幼虫的饮食上的饲料。我们的幼虫发育的结果与以前的稳定同位素分析相同的物种，其中幼虫样品的同位素值与假设的消费者，利用蚯蚓同意的一致。不同方法测定结果的一致性表明，N.日本落叶松很可能是食草动物。与此相反，我们的雌性生殖力实验的结果不同于以前的稳定同位素分析，其中脊椎动物尸体不太可能作为主食的成年人在外地，因此，N的食性。japonicaadults仍然没有解决。我们的观察，女性和幼虫表现最好的肉类和肉类的饮食，分别可能表明，在Silphinae，饮食从食尸性捕食习惯的转变发生在幼虫比成人。
The carrion beetle subfamily Silphinae (Coleoptera: Silphidae) contains dominant macroinvertebrates of soil ecosystems in temperate zones. However, their feeding habits, which determine the role of each species in the ecosystem, have not been sufficiently studied. Moreover, although a diet shift from necrophagy on vertebrate carcasses to predatory feeding on invertebrates is known to occur in this subfamily, the processes and mechanisms of this shift have also been inadequately addressed. We examined female fecundity and larval development on various diets in a Silphinae species,Necrophila(Eusilpha)japonica(Motschulsky). The experimental diets included a meat diet and various invertebrate diets, which reflect the ‘ancestral’ feeding habit in Silphinae, necrophagy, and the ‘derivative’ feeding habit, predatory feeding. Female fecundity was significantly higher on the meat diet (minced beef) than on an insect larvae diet (mealworms and dipteran larvae) but did not significantly differ from that on an earthworm diet. Larval developmental performance was significantly higher on the earthworm diet than on the meat and insect larvae diets. Our results for larval development were consistent with those of previous stable isotope analyses of the same species, in which isotopic values of larval samples agree with those of hypothetical consumers that utilize earthworms. The consistency of results among different methods indicates thatN. japonicalarvae are most likely earthworm feeders. In contrast, our results for the female fecundity experiment differed from those of previous stable isotope analyses, in which vertebrate carcasses unlikely serve as the staple diet of adults in the field; thus, the feeding habits ofN. japonicaadults remain unresolved. Our observations that females and larvae performed best on the meat and earthworm diets, respectively, may indicate that, in Silphinae, the diet shift from necrophagy to predatory habits occurs earlier in larvae than in adults.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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