Fisher Sheri A, Bortolotti Gary R, Fernie Kimberley J, Bird David M, Smits Judit E
Department of Biology, University of Saskatchewan, 112 Science Pl., Saskatoon, Sask., Canada S7N 5E2.
Ecotoxicol Environ Saf. 2006 Feb;63(2):226-35. doi: 10.1016/j.ecoenv.2005.07.021.
We investigated whether polychlorinated biphenyl (PCB) exposure in American kestrels (Falco sparverius) influenced incubation behavior and whether altered behavior could lead to poor reproductive success. Captive kestrels were fed a mixture of PCBs (Aroclors 1248:1254:1260) at an approximate daily dose of 7 mg/kg body weight, 1 month prior to pairing and throughout incubation. Behaviors of 23 control and 23 PCB-exposed pairs were monitored throughout incubation using an electronic balance in the nest box. PCB exposure resulted in longer incubation periods and in altered incubation behaviors. Seven of 14 behavioral variables showed some association with treatment, with sex-specific effects largely biased toward disrupted male behavior. For most behaviors, the treatment effect was explained by the delayed clutch initiation induced by PCBs rather than by a direct physiological impact of the contaminants. PCB-exposed pairs with greater attendance to their eggs and better coordination of incubation duties had improved hatching success.
我们研究了美洲隼（Falco sparverius）接触多氯联苯（PCB）是否会影响孵化行为，以及行为改变是否会导致繁殖成功率低下。在配对前1个月及整个孵化期间，给圈养的隼喂食多氯联苯混合物（Aroclors 1248:1254:1260），每日剂量约为7毫克/千克体重。在整个孵化期间，使用巢箱中的电子天平监测23对对照和23对接触多氯联苯的隼的行为。接触多氯联苯导致孵化期延长和孵化行为改变。14个行为变量中有7个显示出与处理有某种关联，性别特异性效应在很大程度上偏向于破坏雄性行为。对于大多数行为，处理效应是由多氯联苯诱导的产卵延迟解释的，而不是由污染物的直接生理影响解释的。对卵的照料更多且孵化职责协调更好的接触多氯联苯的配对，孵化成功率有所提高。
