Increased susceptibility to No. 2 fuel oil coincident with initiation of particle feeding in developing mud snails, Ilyanassa obsoleta
Increased susceptibility to No. 2 fuel oil coincident with initiation of particle feeding in developing mud snails, Ilyanassa obsoleta
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发育中的泥螺 Ilyanassa obsoleta 开始进食颗粒时，对 2 号燃油的敏感性增加
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
Don C. Miller
中科院分区：
文献类型：
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作者：
J. Pechenik;Don C. Miller
将Ilyanassa obsoleta的包囊胚胎和自由生活的幼虫暴露于浓度高达1.0 ppm的2号燃料油（水适应部分，WAF）中。在1.0 ppm WAF的存在下，软膜色素沉着和幼虫从卵囊中释放的发展被延迟，但暴露于油中并没有增加包囊个体的发育死亡率。过早地从卵囊中取出并直接暴露于油中的个体没有死亡，直到蛋黄储备耗尽并开始以浮游植物为食。摄食、自由生活的幼虫在1.0 ppm WAF时死亡率很高。因此，封装胚胎对油胁迫的敏感性降低可能反映了通过摄入（而不是扩散）而不是通过封装提供的保护程度来摄取有毒物质的重要性。
Encapsulated embryos and free-living larvae of Ilyanassa obsoleta were exposed to concentrations of No. 2 fuel oil (water-accommodated fraction, WAF) up to 1.0 ppm. Development of velum pigmentation and release of larvae from egg capsules were delayed in the presence of 1.0 ppm WAF, but exposure to the oil did not increase developmental mortality of encapsulated individuals. Individuals which were prematurely removed from egg capsules and exposed to oil directly suffered no mortality until yolk reserves were depleted and feeding on phytoplankton commenced. Feeding, free-living larvae suffer high mortality at 1.0 ppm WAF. The reduced susceptibility of encapsulated embryos to the oil stress may therefore reflect the importance of toxicant uptake by ingestion (as opposed to diffusion) rather than the degree of protection afforded by encapsulation.