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首页> 外文期刊>International Journal of Environmental Research and Public Health >First Report of a Toxic Nodularia spumigena (Nostocales/ Cyanobacteria) Bloom in Sub-Tropical Australia. II. Bioaccumulation of Nodularin in Isolated Populations of Mullet (Mugilidae)
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First Report of a Toxic Nodularia spumigena (Nostocales/ Cyanobacteria) Bloom in Sub-Tropical Australia. II. Bioaccumulation of Nodularin in Isolated Populations of Mullet (Mugilidae)

机译：亚热带澳大利亚有毒的结节性海绵状结节藻（Nostocales /蓝细菌）开花的首次报道。二。 Isolated鱼分离种群中结核菌素的生物富集

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Fish collected after a mass mortality at an artificial lake in south-east Queensland, Australia, were examined for the presence of nodularin as the lake had earlier been affected by a Nodularia bloom. Methanol extracts of muscle, liver, peritoneal and stomach contents were analysed by HPLC and tandem mass spectrometry; histological examination was conducted on livers from captured mullet. Livers of sea mullet (Mugil cephalus) involved in the fish kill contained high concentrations of nodularin (median 43.6 mg/kg, range 40.8–47.8 mg/kg dry weight; n = 3) and the toxin was also present in muscle tissue (median 44.0 μg/kg, range 32.3–56.8 μg/kg dry weight). Livers of fish occupying higher trophic levels accumulated much lower concentrations. Mullet captured from the lake 10 months later were also found to have high hepatic nodularin levels. DNA sequencing of mullet specimens revealed two species inhabiting the study lake: M. cephalus and an unidentified mugilid. The two mullet species appear to differ in their exposure and/or uptake of nodularin, with M. cephalus demonstrating higher tissue concentrations. The feeding ecology of mullet would appear to explain the unusual capacity of these fish to concentrate nodularin in their livers; these findings may have public health implications for mullet fisheries and aquaculture production where toxic cyanobacteria blooms affect source waters. This report incorporates a systematic review of the literature on nodularin measured in edible fish, shellfish and crustaceans.
机译：在澳大利亚昆士兰州东南部的一个人工湖中，大量死亡后收集的鱼被检查了结节菌素的存在，因为该湖早先受到了结节菌开花的影响。用HPLC和串联质谱法分析肌肉，肝脏，腹膜和胃中甲醇的提取物。对捕获的鱼肝脏进行组织学检查。参与鱼杀的鱼肝中含有高浓度的结节菌素（中值43.6 mg / kg，范围40.8–47.8 mg / kg干重; n = 3），并且毒素也存在于肌肉组织中（中值） 44.0μg/ kg，干重范围32.3–56.8μg/ kg）。营养水平较高的鱼肝中的浓度低得多。 10个月后从湖中捕获的鱼也被发现具有较高的肝结节素水平。 mul鱼标本的DNA测序揭示了两个栖息在研究湖中的物种：头颅分枝杆菌和一个未知的葫芦。两种鱼的结节藻素暴露量和/或摄取量似乎有所不同，而头孢分支杆菌表明其组织浓度较高。鱼的摄食生态学似乎可以解释这些鱼在肝脏中浓缩结核菌素的异常能力。这些发现可能对鱼渔业和水产养殖业产生公共健康影响，因为有毒的蓝细菌繁殖会影响源水。本报告对食用鱼，贝类和甲壳类动物中的结核菌素文献进行了系统的综述。

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