Laakkonen Juha, Fisher Robert N, Case Ted J
Section of Ecology, Behavior and Evolution, Division of Biology, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0116, USA.
J Parasitol. 2003 Dec;89(6):1153-8. doi: 10.1645/GE-3180.
The microparasite component communities of 2 species of shrews, Notiosorex crawfordi and Sorex ornatus, were investigated for the first time in 2 isolated and 3 continuous landscapes in southern California. With microscopical examination, a total of 6 parasite species was found in N. crawfordi and 8 species in S. ornatus. The highest number (5) of parasite species was detected in the lungs. The corrected estimate of parasite species richness did not significantly correlate with the host abundance in either shrew species. Altitude, and also latitude in N. crawfordi, appeared to be significantly positively associated with the parasite species richness, but this could be due to a false association because of the rare occurrence of some of the parasites or the small altitude range (or both). No other landscape variable analyzed (location, size of the study site, disturbance) was significantly associated with the parasite species richness of the shrews. The parasite assemblages of the 2 shrew species were similar despite the fact that N. crawfordi has a lower metabolic rate than S. ornatus.
首次在加利福尼亚州南部的2个隔离景观和3个连续景观中，对2种鼩鼱（克劳福德氏荒漠鼩鼱和饰纹鼩鼱）的微寄生虫组成群落进行了调查。通过显微镜检查，在克劳福德氏荒漠鼩鼱中总共发现了6种寄生虫，在饰纹鼩鼱中发现了8种。在肺部检测到的寄生虫种类数量最多（5种）。在这两种鼩鼱中，寄生虫物种丰富度的校正估计值与宿主丰度均无显著相关性。海拔以及克劳福德氏荒漠鼩鼱的纬度似乎与寄生虫物种丰富度显著正相关，但这可能是由于一些寄生虫出现频率低或海拔范围小（或两者皆有）导致的假关联。分析的其他景观变量（位置、研究地点大小、干扰）与鼩鼱的寄生虫物种丰富度均无显著关联。尽管克劳福德氏荒漠鼩鼱的代谢率低于饰纹鼩鼱，但这两种鼩鼱的寄生虫组合相似。
