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首页> 外文期刊>Harmful Algae >Gulf menhaden (Brevoortia patronus): A potential vector of domoic acid in coastal Louisiana food webs
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Gulf menhaden (Brevoortia patronus): A potential vector of domoic acid in coastal Louisiana food webs

机译：海湾捕捞者（Brevoortia patronus）：路易斯安那州沿海食物网中海藻酸的潜在载体

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摘要

Harmful algal blooms are an increasing problem for coastal waters world-wide. The presence of the toxigenic diatom genus Pseudo-nitzschia is of concern in the Gulf of Mexico, due to the potential for several species in this genus to produce the neurotoxin domoic acid (DA). Louisiana coastal waters are of particular interest due to the presence of both toxin-producing species of Pseudo-nitzschia and abundant potential vectors. While trophic transfer of DA to consumers has repeatedly occurred along the California coast, little is known about trophic transfer of recently detected DA in the Gulf of Mexico. In this study, the presence of DA was investigated in filter-feeding gulf menhaden (Brevoortia patronus) and in seawater where high abundances of these fish reside. Pseudo-nitzschia presence and enumeration was determined using light microscopy, species identification in seawater and gulf menhaden gut contents was conducted with transmission electron microscopy (TEM), and DA quantification in corresponding seawater and tissue samples was determined by competitive enzyme-linked immunosorbent assay (cELISA). Examination of the phytoplankton revealed the presence of four species of Pseudo-nitzschia: P. calliantha for the first time, P. pseudodelicatissima, P. pungens, and P. americana, with P. calliantha as the dominant Pseudo-nitzschia species. Low levels of DA were detected in both seawater and fish samples, with a significant correlation between the two (n = 22, p = 0.043). Thus, for the first time in the Gulf of Mexico, a potential vector of DA has been identified, revealing the possibility of DA contamination in coastal Louisiana food webs.
机译：有害的藻华是全世界沿海水域日益严重的问题。在墨西哥湾，有毒的硅藻属假奈茨菌属的存在备受关注，这是因为该属中的几种物种都有可能产生神经毒素多摩酸（DA）。路易斯安那州沿海水域特别受到人们的关注，因为同时存在假性尼兹菌毒素的毒素产生物种和丰富的潜在媒介。虽然DA的营养转移已沿加利福尼亚海岸反复发生，但对墨西哥湾最近发现的DA的营养转移知之甚少。在这项研究中，在滤食性海湾鲱鱼（Brevoortia patronus）和这些鱼类高含量的海水中研究了DA的存在。使用光学显微镜确定假性奈瑟菌的存在和计数，使用透射电子显微镜（TEM）进行海水中物种鉴定和海湾鲱鱼肠道内容物的鉴定，并通过竞争性酶联免疫吸附测定法确定相应海水和组织样品中的DA定量（ cELISA）。对浮游植物的检查表明存在四种伪装的伪装：拟南芥（P. calliantha），伪拟对虾假单胞菌（P. pseudodelicatissima），对虾（P. pungens）和美洲假单胞菌（P. americana），其中Calliantha P.占主导地位。在海水和鱼类样品中均检测到低水平的DA，两者之间存在显着相关性（n = 22，p = 0.043）。因此，首次在墨西哥湾发现了DA的潜在载体，这揭示了路易斯安那州沿海食物网中DA污染的可能性。

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  • 来源
    《Harmful Algae》 |2010年第1期|p.19-29|共11页
  • 作者

    Ross Del Rio; Sibel Bargu; Donald Baltz; Spencer Fire; Gary Peterson; Zhihong Wang;

  • 作者单位

    Department of Oceanography and Coastal Sciences, School of the Coast and Environment, 1235 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA;

    rnDepartment of Oceanography and Coastal Sciences, School of the Coast and Environment, 1235 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA;

    rnDepartment of Oceanography and Coastal Sciences, School of the Coast and Environment, 1235 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA;

    rnMarine Biotoxins Program, NOAA/NOS Center for Coastal Environmental Health & Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA;

    rnDepartment of Oceanography and Coastal Sciences, School of the Coast and Environment, 1235 Energy, Coast & Environment Building, Louisiana State University, Baton Rouge, LA 70803, USA;

    rnMarine Biotoxins Program, NOAA/NOS Center for Coastal Environmental Health & Biomolecular Research, 219 Fort Johnson Road, Charleston, SC 29412, USA;

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  • 正文语种 eng
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  • 关键词

    pseudo-nitzschia; domoic acid; gulf menhaden; brevoortia patronus; louisiana; gulf of Mexico;

    机译：假性痴呆海藻酸海湾猛虎短孢子虫路易斯安那州墨西哥湾;

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