毒死蜱对孔雀鱼（孔雀花鳉）繁殖性能的影响。

Effects of chlorpyrifos on reproductive performances of guppy (Poecilia reticulata).

作者信息

De Silva P M C S, Samayawardhena L A

机构信息

Department of Biology, University of Bergen, P.O. Box 7800, 5020 Bergen, Norway.

出版信息

Chemosphere. 2005 Mar;58(9):1293-9. doi: 10.1016/j.chemosphere.2004.10.030.

DOI:10.1016/j.chemosphere.2004.10.030

PMID:15667849

Abstract

Guppy (Poecilia reticulata) was selected to investigate the effects of chlorpyrifos on reproductive performances. Male and female guppy with proven fertility were selected from our own colony and the groups of fish (n=72/group) were exposed to pre-determined chlorpyrifos concentrations (0.002 microg/l, 2 microg/l) based on the 96-h LC50 for guppy. Mating behavior of males was recorded on the 2nd day of exposure. Offspring were counted and survival recorded on the 14th day. Gonopodial thrusts (8/15 min) in 0.002 microg/l and (4/15 min) in 2 microg/l were significantly different from the control group (11/15 min). Similarly, live birth reduced significantly to 8/female in 2 microg/l compared to 27/female in the control group. Survival of offspring after 14 days was reduced to 47% in the 2 microg/l group compared to 94% of survival in the control. Our findings demonstrate that low soluble concentrations of chlorpyrifos affect mating behavior, number of offspring and offspring survival of guppy.

摘要

选用孔雀鱼（孔雀花鳉）来研究毒死蜱对其繁殖性能的影响。从我们自己的鱼群中挑选出已证实具有生育能力的雌雄孔雀鱼，根据孔雀鱼的96小时半数致死浓度，将鱼群（每组n = 72）暴露于预先确定的毒死蜱浓度（0.002微克/升、2微克/升）下。在暴露的第2天记录雄性的交配行为。在第14天统计后代数量并记录其存活情况。0.002微克/升组的生殖足推力为（8次/15分钟），2微克/升组为（4次/15分钟），与对照组（11次/15分钟）有显著差异。同样，与对照组的每只雌鱼产27只幼鱼相比，2微克/升组的每只雌鱼产幼鱼数量显著减少至8只。与对照组94%的幼鱼存活率相比，2微克/升组幼鱼14天后的存活率降至47%。我们的研究结果表明，低可溶性浓度的毒死蜱会影响孔雀鱼的交配行为、后代数量和幼鱼存活率。