Spatial and temporal patterns of Ambystoma tigrinum virus (ATV) prevalence in tiger salamanders Ambystoma tigrinum nebulosum
Spatial and temporal patterns of Ambystoma tigrinum virus (ATV) prevalence in tiger salamanders Ambystoma tigrinum nebulosum
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DOI：
10.3354/dao02061
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发表时间：
2009-05-27
影响因子：
1.4
通讯作者：
Collins, James P.
中科院分区：
文献类型：
--
作者：
Greer, Amy L.;Brunner, Jesse L.;Collins, James P.
两栖动物蛙病毒已被证明是世界各地两栖动物种群大规模死亡的原因。当流行不明显时，蛙病毒感染的时空动态仍不清楚。为了解决这个问题，我们收集了组织样本，从2003年至2006年在4个地理上分离的虎蝾螈Ambystoma tigrinum nebelosum主机种群的凯巴布高原在北方亚利桑那州。我们测试了虎钝口螈病毒（ATV），一种致命的蛙病毒的虎蝾螈，计算ATV的患病率为每个采样日期，并检查时间和空间模式，通过量化的年度水平的ATV同步人群使用组内相关系数。蝾螈种群普遍感染ATV。我们没有观察到发病率或死亡率在这些人群中，即使ATV患病率值从0到57%不等。在某一年内，各地的感染率比各年之间更相似。在整个景观中，患病率没有统计学显著的空间格局。我们的研究结果强调，需要探索新的假设，这些病原体对两栖动物群落的人口水平的影响。
Amphibian ranaviruses have been documented as causes of mass mortality in amphibian populations throughout the world. The temporal and spatial dynamics of ranavirus infections when epidemics are not apparent remains unclear. To address this question, we collected tissue samples from 2003 to 2006 in 4 geographically separated tiger salamander Ambystoma tigrinum nebulosum host populations on the Kaibab Plateau in northern Arizona. We tested for Ambystoma tigrinum virus (ATV), a lethal ranavirus of tiger salamanders, calculated ATV prevalence for each sampling date, and examined temporal and spatial patterns by quantifying the annual level of ATV synchrony among populations using the intraclass correlation coefficient. Salamander populations were commonly infected with ATV. We observed no morbidity or mortality in these populations even as ATV prevalence values varied from 0 to 57%. Infection prevalence across the landscape was more similar within a given year than between years. There was no statistically significant spatial pattern in prevalence across the landscape. Our findings highlight the need to explore new hypotheses regarding the population level impact of these pathogens on amphibian communities.