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首页> 美国卫生研究院文献>Toxics >Metal Levels in Blood of Three Species of Shorebirds during Stopover on Delaware Bay Reflect Levels in Their Food Horseshoe Crab Eggs
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Metal Levels in Blood of Three Species of Shorebirds during Stopover on Delaware Bay Reflect Levels in Their Food Horseshoe Crab Eggs

机译：特拉华湾中途停留期间三种水鸟的血液中的金属含量反映了其食物马蹄蟹卵中的金属含量

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摘要

Understanding the relationship between metal level in predators and their prey is an important issue, and is usually difficult to determine because animals eat a variety of organisms. However, shorebirds that stop over during spring migration along Delaware Bay (New Jersey) stay for only 2–3 weeks, and eat mainly horseshoe crab (Limulus polyphemus) eggs. In this paper, we examine the relationship between metal levels in horseshoe crab eggs, and blood and feather levels of metals in red knot (Calidris canutus rufa; n = 30), sanderling (Calidris alba; n = 20) and semipalmated sandpiper (Calidris pusilla; n = 38) from Delaware Bay. There is a rich literature on metal levels in feathers. For all three species, the levels of arsenic, cadmium, chromium, lead and mercury in blood were highly correlated with the levels of metals in the eggs of horseshoe crab (17 pooled samples). This indicates that the levels in the blood of these shorebirds quickly reflect levels in their prey (horseshoe crab eggs), while metals in the feathers were not correlated with the levels in eggs. Semipalmated sandpipers had the lowest levels of arsenic in blood and the highest levels of arsenic in feathers, compared to the other species. At Delaware Bay, semipalmated sandpipers have a diet higher in marsh invertebrates than the other species, which may account for the differences. The levels of cadmium and chromium in blood were significantly higher in knots than other species; knots only ate horseshoe crab eggs. For all of the metals except arsenic, the ratio of levels in blood/feathers was similar among species. For arsenic, the ratio of levels in blood/feathers were significantly lower in semipalmated sandpipers than in the other species, by an order of magnitude.
机译：了解捕食者中的金属含量与其猎物之间的关系是一个重要的问题，并且由于动物食用各种生物，因此通常很难确定。但是，春季迁徙期间沿特拉华湾（新泽西州）迁徙的shore鸟只停留2-3周，主要吃horse（卵mul）卵。在本文中，我们研究了crab蟹卵中的金属含量与红结（Calidris canutus rufa； n = 30），三趾er鱼（Calidris alba； n = 20）和半semi（Calidris）中金属的血液和羽毛含量之间的关系。 pusilla； n = 38），来自特拉华湾。关于羽毛中金属含量的文献很多。对于这三个物种，血液中砷，镉，铬，铅和汞的含量与of的卵中的金属含量高度相关（共收集了17个样品）。这表明这些shore的血液中的含量迅速反映出其猎物（hor蟹卵）中的含量，而羽毛中的金属与卵中的含量无关。与其他物种相比，半掌sand在血液中的砷含量最低，在羽毛中的砷含量最高。在特拉华湾，半棕榈sand的饮食中沼泽无脊椎动物比其他物种高，这可能是造成这种差异的原因。结中血液中镉和铬的含量明显高于其他物种。结只吃了crab蟹卵。对于除砷以外的所有金属，物种间血液/羽毛中的含量比率相似。对于砷而言，半掌sand中的血液/羽毛水平比率明显比其他物种低一个数量级。

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