Effects of Hexavalent Chromium Exposure on Growth and Development of the Blowfly, Chrysomya Chloropyga (Diptera: Calliphoridae).

IF 2.2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Olalekan O Olayioye, Joseph A Adeyemi, Chris O Adedire
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Abstract

Hexavalent chromium (Cr6+) is a known carcinogen that has been listed as a priority pollutant by the Environmental Protection Agency (EPA). The toxic effects of Cr6+ in some organisms, especially aquatic animals have received considerable attention over the years but not much is known about the adverse effects of Cr6+ in terrestrial insects despite their potential exposure to Cr6+ through ingestion of contaminated food and water. Therefore, this study aimed at investigating the effects of Cr6+ on the survival, growth and development of the blowfly, Chrysomya chloropyga. The eggs of C. chloropyga that were collected from laboratory stock were exposed to dietary Cr6+ at different concentrations; 0, 4, 8, 12, 16, and 20 mg/mL and the eggs were monitored throughout the developmental stages till adult emergence, during which growth (length, width, and weight at larval and pupal stages) and developmental parameters (duration of development at different stages, egg hatchability, pupation, and adult emergence) were measured. Exposure to Cr6+ prolonged the developmental period in the blowflies with total developmental period reaching 231.00 ± 1.45 h in the insects that were treated with 20 mg/mL Cr6+ compared with 217.91 ± 1.16 h in the control. The percentage hatchability, pupation rate and number of emerged adults reduced significantly in groups exposed to Cr6+ (especially at 20 mg/mL) compared to the control. The mean length, width and weight decreased significantly in insects exposed to dietary Cr6+ at all the immature stages. The results of this study showed that dietary Cr6+ exposure have adverse effects on the growth and development of C. chloropyga.

六价铬暴露对绿蛉生长发育的影响(双翅目:灰蛉科)
六价铬(Cr6+)是一种已知的致癌物,已被美国环境保护署(EPA)列为优先污染物。Cr6+对某些生物,特别是水生动物的毒性作用多年来受到了相当大的关注,但尽管陆生昆虫可能通过摄入受污染的食物和水而暴露于Cr6+,但对Cr6+对陆生昆虫的不利影响知之甚少。因此,本研究旨在探讨Cr6+对绿蛉(Chrysomya chloropyga)生存、生长和发育的影响。将实验室饲养的绿藻卵暴露于不同浓度的饲料Cr6+中;监测0、4、8、12、16、20 mg/mL和卵的整个发育阶段直至成虫羽化,在此期间测量生长(幼虫期和蛹期的长度、宽度和重量)和发育参数(不同阶段的发育持续时间、卵的孵化率、化蛹率和成虫羽化率)。Cr6+暴露可延长苍蝇的发育时间,20 mg/mL Cr6+处理组的总发育时间为231.00±1.45 h,对照组为217.91±1.16 h。与对照相比,暴露于Cr6+(特别是20 mg/mL)组的孵化率、化蛹率和羽化成虫数显著降低。在未成熟阶段,饲粮中添加Cr6+显著降低了昆虫的平均长、宽和体重。本研究结果表明,饲粮中暴露Cr6+对绿藻的生长发育有不利影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
5.60
自引率
3.70%
发文量
230
审稿时长
1.7 months
期刊介绍: The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.
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