Laboratory studies on larval food habits of two syntopic, related, granivorous ground beetles Amara chalcites and A. congrua (Coleoptera: Carabidae): a comparison with stable isotope analysis
Laboratory studies on larval food habits of two syntopic, related, granivorous ground beetles Amara chalcites and A. congrua (Coleoptera: Carabidae): a comparison with stable isotope analysis
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两种同位、相关的谷粒食性地面甲虫 Amara chalcites 和 A. congrua（鞘翅目：步甲科）幼虫食物习性的实验室研究：与稳定同位素分析的比较
DOI：
10.1007/s13355-011-0070-x
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发表时间：
2011
影响因子：
1.3
通讯作者：
K. Sasakawa
中科院分区：
文献类型：
--
作者：
K. Sasakawa
本文研究了两种同位、亲缘关系较近的步甲Amara chalcitesDejean和A. congruaMorawitz使用实验室饲养实验，并与以前的稳定同位素分析相同的物种的结果进行了比较。以6种不同的饲料饲养幼虫（荠菜（Capsella bursa-pastoris（Linnaeus）Medikus）、繁缕（Stellaria media（Linnaeus）Villars）、蒲公英（Taraxacum officinaleWeber ex Wiggers）的种子;混合种子;拟步甲幼虫（TenebriomolitorLinnaeus）;拟步甲+混合种子）。对于这两个物种，甲虫饲料种子表现出中等至高的存活率，除了那些fedStellariaseeds，其中A。存活率低。纯动物饮食导致A.但存活率低。全等这些结果与同位素分析结果一致，其中A.黄铜矿幼虫比A.这两个物种的幼虫似乎更喜欢不同类型的种子。相比之下，两种方法之间的饮食对成年体重的影响不同。在实验室实验中，在幼虫阶段用动物食物补充种子对两个物种的成年体重产生积极影响，而在同位素分析中，这种积极影响只发生在A。黄铜矿对这两种方法之间的差异提供了可能的解释，并对未来的研究提出了建议。
This study examined larval food habits of two syntopic, related, carabidsAmara chalcitesDejean andA. congruaMorawitz using a laboratory-rearing experiment, and the results were compared with those of a previous stable-isotope analyses of the same species. Larvae were reared on six different diets (seeds ofCapsella bursa-pastoris(Linnaeus) Medikus,Stellaria media(Linnaeus) Villars,Taraxacum officinaleWeber ex Wiggers; mixed seeds;TenebriomolitorLinnaeus larvae; andTenebriolarvae + mixed seeds). For both species, beetles fed seed diets exhibited moderate to high survival rates, with the exception of those fedStellariaseeds, on whichA. congruashowed low survival rates. The pure-animal diet resulted in high survival rates ofA. chalcitesbut low survival rates ofA. congrua. These results were consistent with those of the isotope analysis, in whichA. chalciteslarvae were more carnivorous than wereA. congrualarvae, and the larvae of the two species appeared to prefer different types of seeds. In contrast, the effect of diet on adult weight differed between the two methods. In the laboratory experiments, supplementing seeds with animal food during the larval stage positively affected adult weight for both species, whereas in the isotope analysis, the positive effect only occurred inA. chalcites. Possible explanations for the discrepancy between the two methods and suggestions for future research are provided.