CHLORINATED HYDROCARBONS AND SHELL THINNING IN EGGS OF (ACCIPITER) HAWKS IN ONTARIO, 1986-1989
CHLORINATED HYDROCARBONS AND SHELL THINNING IN EGGS OF (ACCIPITER) HAWKS IN ONTARIO, 1986-1989
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DOI：
10.1016/0269-7491(94)90190-2
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发表时间：
1994-01-01
影响因子：
8.9
通讯作者：
MARTIN, PA
中科院分区：
文献类型：
--
作者：
ELLIOTT, JE;MARTIN, PA
尖胫鹰（Accipiter striatus）、库珀鹰（A. cooperii）和北方苍鹰（A.从1986年到1989年收集自安大略中南部的巢穴。在分析的所有鸡蛋中，都存在可检测到的氯化碳氢化合物DDE、DDT、DDD、灭蚁灵、光灭蚁灵、顺式九氯、反式九氯、氧氯菊酯、狄氏剂、环氧七氯、六氯苯和多氯联苯。平均污染物水平最高的尖胫鹰，略低于库珀的鹰，并显着降低苍鹰：例如，平均DDE值分别为7.23，4.48和0.90毫克千克-1（湿重）。总的多氯联苯水平一般低于1.5毫克公斤-1，低于与生殖影响在现场和实验室研究与其他物种。尖皮鹰蛋和库珀鹰蛋的平均壳厚度显著小于DDT时代前的平均壳厚度（分别为-10%和-8%），这种减少可能与繁殖成功无关。苍鹰蛋壳厚度没有显着减少。这三个物种之间的污染水平可能反映了不同的饮食习惯和迁徙模式。
Eggs of sharp-shinned hawks (Accipiter striatus), Cooper's hawks (A. cooperii), and northern goshawks (A. gentilis) were collected from nests in south-central Ontario from 1986 to 1989. Detectable levels of the chlorinated hydrocarbons DDE, DDT, DDD, mirex, photomirex, cis-nonachlor, trans-nonachlor, oxychlordane, dieldrin, heptachlor epoxide, HCB and PCB were present in all the eggs analyzed. Mean contaminant levels were highest in sharp-shinned hawks, slightly lower in Cooper's hawks, and significantly lower in goshawks: for example, mean DDE values were 7.23, 4.48 and 0.90 mg kg-1 (wet weight), respectively. Total PCB levels were generally less than 1.5 mg kg-1, lower than those associated with reproductive effects in field and laboratory studies with other species. Mean shell thicknesses of sharp-shinned and Cooper's hawk eggs were significantly less than mean pre-DDT era thicknesses (-10 and -8%, respectively), reductions that were probably not relevant to reproductive success. Goshawk eggs exhibited no significant reduction in shell thickness. Contaminant levels among the three species probably reflect differing food habits and migratory patterns.