Chemical deterrence of a marine cyanobacterium against sympatric and non-sympatric consumers
Chemical deterrence of a marine cyanobacterium against sympatric and non-sympatric consumers
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DOI：
10.1007/s10750-005-1129-x
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发表时间：
2006-01-01
期刊：
影响因子：
2.6
通讯作者：
Tibbetts, I
中科院分区：
文献类型：
--
作者：
Capper, A;Cruz-Rivera, E;Tibbetts, I
本研究探讨了预先接触有毒代谢物对海洋蓝藻Lyngbya Majuscula适口性的影响。我们研究了从澳大利亚昆士兰州东南部莫雷顿湾水华中获得的含有LTA和DAT的多刺蚁粗提物的适口性，将其分为两组：(1)来自关岛的多刺蚁中食动物，那里LTA和DAT的产生很少；(2)在莫雷顿湾发现了以多刺蚁为食的宏观和中游动物，那里LTA和DAT通常是主要的次生代谢物。采用人工饲料的配对饲养试验，以确定不同消费者的适口性。人工饲料由悬浮在琼脂中的轮藻组成(对照)或涂有大石榴粗提物(处理)。在关岛，两足类Parhyale hawasis和Cymadusa inbroglio；马基德蟹Menaethius monoceros；以及海胆Echinmetra mathaei受到莫顿湾粗提物的显著威慑。来自关岛的海兔Stylocheilus striatus被处理过的食物刺激摄食，而从Moreton Bay采集的Stylocheilus striatus则没有食物类型的区别。在摩顿湾，这种粗提物显著地阻止了头齿龙和野生捕获的兔子鱼的生长。然而，圈养繁育的、没有已知的大斑潜蝇经验的青海斑潜蝇并不清楚地区分食物选择。无论先前接触或与水华有何关联，大斑潜蝇粗提物都能阻止大多数介食者取食。
This study investigates the influence of mesograzer prior exposure to toxic metabolites on palatability of the marine cyanobacterium, Lyngbya majuscula. We examined the palatability of L. majuscula crude extract obtained from a bloom in Moreton Bay, South East Queensland, Australia, containing lyngbyatoxin-a (LTA) and debromoaplysiatoxin (DAT), to two groups: (1) mesograzers of L. majuscula from Guam where LTA and DAT production is rare; and (2) macro- and mesograzers found feeding on L. majuscula blooms in Moreton Bay where LTA and DAT are often prevalent secondary metabolites. Pair-wise feeding assays using artificial diets consisting of Ulva clathrata suspended in agar (control) or coated with Moreton Bay L. majuscula crude extracts (treatment) were used to determine palatability to a variety of consumers. In Guam, the amphipods, Parhyale hawaiensis and Cymadusa imbroglio; the majid crab Menaethius monoceros; and the urchin Echinometra mathaei were significantly deterred by the Moreton Bay crude extract. The sea hares, Stylocheilus striatus, from Guam were stimulated to feed by treatment food whereas S. striatus collected from Moreton Bay showed no discrimination between food types. In Moreton Bay, the cephalaspidean Diniatys dentifer and wild caught rabbitfish Siganus fuscescens were significantly deterred by the crude extract. However, captive-bred S. fuscescens with no known experience with L. majuscula did not clearly discriminate between food choices. Lyngbya majuscula crude extract deters feeding by most mesograzers regardless of prior contact or association with blooms.