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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Zinc incorporation in the otoliths of juvenile pink snapper (Pagrus auratus Forster):The influence of dietary versus waterborne sources
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Zinc incorporation in the otoliths of juvenile pink snapper (Pagrus auratus Forster):The influence of dietary versus waterborne sources

机译：少年粉红鲷鱼（Pagrus auratus Forster）耳石中的锌掺入：饮食来源与水源的影响

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摘要

Separate laboratory experiments were conducted to examine if incorporation of Zn into the otoliths of juvenile pink snapper (Pagrus auratus Forster) was related to levels in the food and/or water. In the first experiment, fish were fed a regular diet (600 mg Zn kg~(-1) dw, control group) or a Zn-enriched diet (6000 mg Zn kg~(-1) dw or 9000 mg Zn kg~(-1) dw) for 35 days. In the second experiment, fish were exposed to waterborne Zn concentrations of <0.005 μg L~(-1) (control), 50 μg L~(-1),100 μg L~(-1) and 200 μg L~(-1) for 35 days. The sagittal otoliths were analysed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Juvenile fish exposed to higher concentrations of waterborne Zn did not display increased Zn levels in their otoliths. However, Zn levels in the otoliths of fish consuming the Zn-enriched diet were significantly higher relative to control fish. This study clearly demonstrated that dietary Zn was the major source of Zn incorporated into the otoliths by this marine fish.
机译：进行了单独的实验室实验，以检查将Zn掺入少年粉红鲷鱼（Pagrus auratus Forster）的耳石中是否与食物和/或水中的含量有关。在第一个实验中，给鱼类喂食常规饮食（600 mg Zn kg〜（-1）dw，对照组）或富含锌的饮食（6000 mg Zn kg〜（-1）dw或9000 mg Zn kg〜（ -1）dw）35天。在第二个实验中，将鱼暴露于<0.005μgL〜（-1）（对照），50μgL〜（-1），100μgL〜（-1）和200μgL〜（- 1）35天。使用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）分析了矢状耳石。暴露于较高浓度的水性锌的幼鱼的耳石中未显示锌含量的增加。但是，与对照鱼相比，食用富含锌饮食的鱼的耳石中的锌含量显着更高。这项研究清楚地表明，饮食中的锌是该海鱼掺入耳石中锌的主要来源。

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