Pre-ovipositional maternal care alleviates food stress of offspring in the flower beetle Dicronocephalus wallichii
Pre-ovipositional maternal care alleviates food stress of offspring in the flower beetle Dicronocephalus wallichii
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产卵前母体护理减轻了花甲虫 Dicronocephalus wallichii 后代的食物压力
DOI：
10.1007/s10164-018-0544-1
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发表时间：
2018
影响因子：
0.9
通讯作者：
CP.
中科院分区：
文献类型：
--
作者：
Kojima;W. & Lin;CP.
与大多数其他花甲虫不同的是，雌雄花甲虫表现出筑巢行为。雌性在土壤中挖一个洞，把死去的植物叶子切成小块来提供巢穴，然后在巢里产卵。孵出的幼虫被认为以母亲准备的巢材料为食，但产卵前护理对幼虫性能的影响尚未得到测试。孵化出的幼虫在巢中停留15-30天，直到它们消耗巢材。我们研究了在良性和食物压力条件下，提供巢穴的存在是否能提高幼虫的性能。在高营养土壤条件下，设置巢穴不影响幼虫成活率和生长速度。相反，在低营养土壤中，没有提供巢穴的幼虫死亡率比有提供巢穴的幼虫死亡率高得多。在低营养土壤中筑巢的幼虫生长速度与在高营养土壤中饲养的幼虫生长速度相同。这些结果表明，雌性在幼虫发育初期通过建造预备巢来缓解食物应激。
Unlike most other flower beetles, females ofDicronocephalus wallichiiexhibit nesting behaviour. The female constructs a burrow in the soil, cuts dead plant leaves into small pieces to provision the nest, and then lays one egg inside the nest. Hatched larvae have been thought to feed on the nest materials prepared by their mothers, but the effects of pre-ovipositional care on larval performance have not been tested. The hatched larvae were found to stay in the nest for 15–30 days until they consumed the nest materials. We examined whether the presence of provisioned nests enhanced larval performance under both benign and food-stress conditions. With high-nutrient soil, larval survival rate and growth speed were not affected by the presence of provisioned nests. By contrast, with low-nutrient soil, mortality of the larvae was much higher in the absence than in the presence of provisioned nests. The growth speed of larvae with nests located in low-nutrient soil was as high as those reared in high-nutrient soil. These results indicate that females alleviate the food stress of larvae during their initial developmental stage by constructing provisioned nests.
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