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首页> 外文期刊>Environmental toxicology and chemistry >IMPACTS OF NONPOINT INPUTS FROM POTATO FARMING ON POPULATIONS OF SLIMY SCULPIN (COTTUS COGNATUS)
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IMPACTS OF NONPOINT INPUTS FROM POTATO FARMING ON POPULATIONS OF SLIMY SCULPIN (COTTUS COGNATUS)

机译：马铃薯非点源输入对斯利米UL豆（COTTUS COGNATUS）种群的影响

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摘要

The potential influence of agricultural activity, particularly potato cultivation, on slimy sculpin populations (Cottus cognatus) was examined at 19 rivers of New Brunswick, Canada. Comparisons with forested streams resulted in differences in fish density, size, and reproductive performance. Young-of-the-year (YOY) sculpin were present only at two of 11 agricultural sites, though they were present at all nine forested sites. Sediment deposition was greatest at agricultural sites, with increased fine sediments deposited. Larger, coarse sands were deposited at two sites with active forest operations. Temperature had a stronger correlation than sedimentation with sculpin size and density in the agricultural region. Agricultural catchments were warmer than in forested catchments (median = 16.0 and 13.3℃, respectively). Body size of slimy sculpin was correlated positively and YOY densities correlated negatively with temperature, and sites with temperatures ≥25℃ were devoid of YOY sculpin. Our data indicate there is a significant effect of temperature on slimy sculpin populations in rivers of potato farming areas, highlighting the importance of examining indirect factors when investigating possible impacts of nonpoint source agricultural inputs. Indirect factors such as sediment deposition and temperature need to be considered in order to discriminate accurately the chronic impacts of agricultural chemicals on fish populations.
机译：在加拿大新不伦瑞克省的19条河流中，研究了农业活动（尤其是马铃薯种植）对粘糊糊的（Cottus cognatus）种群的潜在影响。与森林溪流的比较导致鱼类密度，大小和繁殖性能的差异。年青（Yoyo-the-year）sculpin仅出现在11个农业用地中的两个中，尽管它们都出现在所有9个森林用地中。农田的沉积物沉积最大，沉积的细沉积物增加。随着森林活动的开展，较大的粗砂沉积在两个地点。在农业地区，温度与沉积物与的大小和密度的相关性强。农业集水区比森林集水区温暖（中位数分别为16.0和13.3℃）。黏糊糊状s的体型与温度呈正相关，YOY密度与温度呈负相关，且温度≥25℃的部位不含YOY cul。我们的数据表明温度对马铃薯种植区河流中的粘鳞种群有显着影响，突出了在调查非点源农业投入物的可能影响时研究间接因素的重要性。为了准确地区分农药对鱼类种群的长期影响，需要考虑诸如沉积物沉积和温度等间接因素。

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