Movalli P A
Istituto Chimica Organica, Università di Milano, Via Venezian, 21-20133 Milan, Italy.
Environ Pollut. 2000 Aug;109(2):267-75. doi: 10.1016/s0269-7491(99)00258-4.
This paper presents the levels of metals and other trace elements measured in feathers of laggar falcons, Falco biarmicus jugger, in Pakistan. The laggar falcon is resident or locally migrant throughout the Indian Subcontinent where it is a rare and declining species. Breast feathers from 57 live, recently trapped, adult and juvenile laggar falcons and from five dead birds were collected from Bahawalpur, Bahawalnagar, Mithi, Chachcro, Jacobabad and Karachi districts. Cadmium (Cd), lead (Pb) and mercury (Hg) were analysed by atomic absorption spectrophotometry (AAS), cobalt (Co), selenium (Se), zinc (Zn), scandium (Sc), chromium (Cr), cesium (Cs), lanthanum (La) and bromine (Br) by neutron activation analysis (NAA). Hg levels were below those found in other raptors with reduced reproductive success. No correlation was found between Hg and Se levels. For some metals and elements interpretation of results is difficult as no data exist in the literature. Concentrations did not differ significantly between males and females nor between juveniles and adults, but differed among districts for Pb, Hg, Co, Sc, Cr, La and Br. A significant correlation was found between Pb concentration and occurrence of louse eggs. As the laggar is resident or a partial local migrant, it is probable that the metal burden in adult and juvenile feathers reflects the level of contamination in these particular districts.
本文介绍了在巴基斯坦猎隼（Falco biarmicus jugger）羽毛中测得的金属和其他微量元素水平。猎隼在整个印度次大陆为留鸟或局部迁徙鸟类，属于珍稀且数量不断减少的物种。从巴哈瓦尔布尔、巴哈瓦尔纳加尔、米提、查克罗、雅各布阿巴德和卡拉奇等地区收集了57只刚捕获的成年和幼年活体猎隼以及5只死鸟的胸羽。采用原子吸收分光光度法（AAS）分析镉（Cd）、铅（Pb）和汞（Hg），采用中子活化分析法（NAA）分析钴（Co）、硒（Se）、锌（Zn）、钪（Sc）、铬（Cr）、铯（Cs）、镧（La）和溴（Br）。汞含量低于繁殖成功率降低的其他猛禽。未发现汞和硒含量之间存在相关性。对于某些金属和元素，由于文献中没有数据，结果难以解释。雌雄之间以及幼年和成年之间的浓度没有显著差异，但不同地区的铅、汞、钴、钪、铬、镧和溴含量存在差异。发现铅浓度与虱卵的出现之间存在显著相关性。由于猎隼为留鸟或局部迁徙鸟类，成年和幼年羽毛中的金属负荷很可能反映了这些特定地区的污染水平。
