Dataset and R code for Humann-Guilleminot et al. - Dose-dependent effects of cadmium on food consumption, mass, and bioaccumulation in the moth <i>Spodoptera littoralis.</i>

Our environment is increasingly contaminated by various substances, mainly from industrial and agricultural activities. Among the main pollutants, heavy metals, are highly toxic to a wide range of organisms including invertebrates. In our study, we focused on the impacts of cadmium on the model pest moth <i>Spodoptera littoralis</i>. In laboratory conditions, larvae were exposed to a diet contaminated with nine different cadmium concentrations ranging from 7.80 µg/g to 50 mg/g of food, over six developmental stages. Our results show that sublethal doses of cadmium have a significant effect on food consumption and relative larval growth rate over a 6-day period, and to a lesser extent, affect larval mass at higher doses. Adverse effects were noted at a sublethal dose of 31.25 µg/g, with particularly severe outcomes at the highest lethal doses ranging from 0.5 to 50 mg/g, where 100% mortality was observed after treatment. While higher doses from 250 µg/g influenced larval mass, most larvae recovered and regained mass, except for those exposed to the two highest doses just prior metamorphosis. In addition, our results indicated that cadmium accumulation reached its maximum at pupal stage and decreased in adults, suggesting that efficient detoxification processes occur during metamorphosis, with significant amounts of cadmium that were excreted through the integument and exuviae at the pre-pupal stage. Moreover, moths that ingested cadmium at larval stage have stored most of it in their digestive tract, from where it has been transferred to various parts of the body, including the head and antennae, via haemolymph.

当前环境正日益受到各类物质的污染，此类污染主要源自工农业生产活动。在主要污染物中，重金属对包括无脊椎动物在内的多种生物具有极强毒性。本研究聚焦镉对模式害虫斜纹夜蛾（*Spodoptera littoralis*）的影响。在实验室条件下，我们让幼虫在含9种不同镉浓度（范围为7.80 μg/g至50 mg/g食物）的人工饲料中饲养，覆盖其6个发育阶段。研究结果显示，在6天的饲养周期内，亚致死剂量的镉对幼虫的取食量及相对生长速率具有显著影响；在更高剂量下，镉对幼虫体重的影响则相对较弱。在31.25 μg/g的亚致死剂量下即可观测到不利影响；当剂量处于0.5至50 mg/g的最高致死剂量区间时，负面影响尤为严重，处理后幼虫死亡率达100%。尽管250 μg/g及以上的较高剂量会影响幼虫体重，但多数幼虫能够恢复并重新增重，仅在变态发育前暴露于两种最高剂量的幼虫除外。此外，研究结果表明，镉的累积量在蛹期达到峰值，成虫体内的镉累积量则有所下降，这提示变态发育过程中存在高效的解毒机制；预蛹期时，大量镉会通过体壁及蜕被排出体外。此外，幼虫期摄入镉的蛾类成虫，其体内大部分镉储存于消化道中；随后镉可通过血淋巴转移至身体各部位，包括头部及触角。

搜集汇总

背景与挑战

背景概述

该数据集包含一项研究的数据和R代码，探讨镉对蛾类Spodoptera littoralis的食物消耗、质量和生物积累的剂量依赖性效应。实验在实验室条件下进行，幼虫暴露于九个镉浓度，结果显示镉显著影响食物消耗和生长率，高剂量导致完全死亡率，并揭示了镉在变态过程中的积累和解毒模式。数据集适用于生态毒理学和重金属污染影响分析。