Variation in the response of juvenile and adult gastropods (Lymnaea stagnalis) to cyanobacterial toxin (microcystin-LR)
Variation in the response of juvenile and adult gastropods (Lymnaea stagnalis) to cyanobacterial toxin (microcystin-LR)
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DOI：
10.1002/tox.20147
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发表时间：
2005-12-01
影响因子：
4.5
通讯作者：
Le Rouzic, B
中科院分区：
文献类型：
--
作者：
Gérard, C;Brient, L;Le Rouzic, B
由于越来越多的公共卫生问题有关的水生生态系统中的产毒蓝藻的增殖，我们已经调查了池塘蜗牛的滞水螺的反应，暴露于33微克/L的微囊藻毒素-LR 6周，通过其生命特征（生存，生长，繁殖力）和运动;微囊藻毒素-LR的吸收也被量化的蜗牛身体组织。为了研究与发育阶段相关的反应的潜在可塑性，将性未成熟和成熟的蜗牛暴露于毒素。根据我们的研究结果，微囊藻毒素-LR积累在蜗牛组织中在较高的水平，在青少年（7.96纳克/克鲜重）与成人（2.17纳克/克鲜重）。无论年龄，存活，生长和运动不受毒素的影响，和污染的成人的繁殖力减少了一半。这些结果进行了讨论的负面影响，水微囊藻毒素-LR发生的腹足类的自然种群的动态。(C)2005 Wiley Periodicals，Inc.
Owing to the increasing public health problem related to the proliferation of toxin-producing cyanobacteria in aquatic ecosystems, we have investigated the response of the pond snail Lymnaea stagnalis exposed to 33 mu g/L microcystin-LR for 6 weeks, through its life traits (survival, growth, fecundity) and locomotion; uptake of microcystin-LR was also quantified in the snail body tissues. To study the potential plasticity of the response related to the development stage, snails were exposed to the toxin as sexually immature and mature. According to our results, microcystin-LR accumulated in snail tissues at a higher level in juveniles (7.96 ng/g fresh weight) versus adults (2.17 ng/g fresh weight). Whatever the age, survival, growth, and locomotion were not affected by the toxin, and fecundity of polluted adults was reduced by half. These results are discussed in terms of negative effects of aqueous microcystin-LR occurrence on the dynamics of natural populations of gastropods. (C) 2005 Wiley Periodicals, Inc.