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An integrative response by Mytilus chilensis to the toxic dinoflagellate Alexandrium catenella

机译：智利Mytilus对有毒的鞭毛藻山毛亚历山大藻的综合反应

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摘要

Physiological responses of Mytilus chilensis exposed to the toxic dinoflagellate Alexandrium catenella were measured over 21 days in the laboratory and were compared with control mussels not exposed to the dinoflagellate. Mussels were collected from culturing ropes at Yaldad Bay, southern Chile (43°08'S 73°44'W), in August 2004 and acclimated to laboratory conditions for one week prior to the experiment. After 8 days, the paralytic shellfish poisoning (PSP) toxins (i.e. saxitoxin) in the tissues of exposed mussels exceeded safe levels for human consumption. Clearance rates, ingestion of organic matter, and absorption efficiency of exposed mussels were significantly lower than those of controls on day 0, but this was followed by an increase on day 3. The exposed mussels also increased their excretion rate over time, and this increase was significantly correlated with the accumulation of PSP toxins in their tissues. Oxygen consumption was not affected by the PSP toxins. The scope for growth (SFG) onrnday 0 was negative in exposed mussels, but it increased during the experiment. Although feeding activity and absorption efficiency were adversely affected during the first few days of exposure to PSP toxins from A. catenella in the laboratory, the M. chilensis cultured in Yaldad Bay may have evolved mechanisms that allow them to exploit the toxic dinoflagellate as a food source.
机译：在实验室中测量了21天暴露于有毒鞭毛藻亚历山大藻的智利Mytilus chilensis的生理反应，并将其与未暴露于鞭毛藻的对照贻贝进行了比较。 2004年8月，在智利南部的亚尔达德湾（43°08'S 73°44'W）的养殖绳中收集了贻贝，并在实验前一周适应了实验室条件。 8天后，暴露的贻贝组织中的麻痹性贝类中毒（PSP）毒素（即毒毒素）超过了人类食用的安全水平。在第0天，暴露的贻贝的清除率，有机物的摄入和吸收效率显着低于对照组，但随后在第3天有所增加。随着时间的推移，暴露的贻贝的排泄率也会增加，并且这种增加与PSP毒素在其组织中的积累显着相关。氧气消耗不受PSP毒素的影响。在暴露的贻贝中，第0天的生长范围（SFG）为负，但在实验过程中有所增加。尽管在实验室中接触到毛链霉菌的PSP毒素的最初几天，进食活性和吸收效率受到不利影响，但在雅尔达德湾培养的智利分枝杆菌可能已经进化出机制，可以使它们利用有毒的鞭毛藻作为食物资源。

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  • 来源
    《Marine biology》 |2010年第9期|P.1967-1974|共8页
  • 作者

    Jorge M. Navarro; Andrea M. Contreras;

  • 作者单位

    Instituto de Biologfa Marina 'Dr. Juergen Winter',Universidad Austral de Chile, Casilla 567, Valdivia, Chile;

    rnSchool of Biological Sciences, University of Canterbury,Private Bag 4800, Christchurch, New Zealand;

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