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首页> 外文期刊>Comparative parasitology >Effect of Temperature on the Release of Proterometra macrostoma (Trematoda: Digenea) Cercariae from Their Snail Intermediate Host, Pleurocera semicarinata (Gastropoda: Pleuroceridae) at North Elkhorn Creek, Kentucky
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Effect of Temperature on the Release of Proterometra macrostoma (Trematoda: Digenea) Cercariae from Their Snail Intermediate Host, Pleurocera semicarinata (Gastropoda: Pleuroceridae) at North Elkhorn Creek, Kentucky

机译：温度对来自北埃尔科恩溪，肯塔基州的蜗牛中间宿主（Trematoda：DigeNea）植物中的Proterometra macrostoma（Trematoda：Digenea）植物体的影响

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The effect of temperature on cercarial release has been well documented for several digenean species; however, there have been no prior studies assessing shedding of cercariae from snails infected with the azygiid, Proterometra macrostoma. Snails, Pleurocera semicarinata, were collected at the Lemon's Mill site on North Elkhorn Creek in Scott County, Kentucky during June and July 2016. Snails shedding cercariae (n = 453) were assigned to temperature treatments (10, 13, 15, 18, 20, 25, and 30 degrees C) that were within the range of previously reported seasonal water temperatures at North Elkhorn Creek. Snails were acclimated to experimental temperatures for 3 d. Cercarial counts were then made at 0900 h daily over the next 7 d, and the average 7-d cercarial release was calculated for each snail. The minimum emergence threshold temperature for Pr. macrostoma cercarial release was determined to be approximately 13 degrees C, whereas the minimum development threshold temperature was between 10 and 12 degrees C. Notably, cercarial release increased with temperature up to 25 degrees C, but declined at 30 degrees C. Q(10) values calculated from 10 degrees C intervals were greatest at the lowest (13-23 degrees C) temperature interval (Q(10) = 16.1), and declined at the higher (15-25 and 20-30 degrees C) intervals (Q(10) = 4.3 and Q(10) = 1.8, respectively). Snail survivorship within combined replicates ranged from 87.1 to 100% over the 10-d experiment, with the lowest survivorship observed at 30 degrees C. These results are discussed with regard to climate change and global warming.
机译：对于几种DigeNean物种，温度对盲羊释放的影响已经充分记录;然而，没有先前的研究，评估来自牛皮氏菌，Proterometra macrostoma的蜗牛的唾液酸脱落。在2016年6月和7月在肯塔基州斯科特县北埃尔科恩溪的柠檬磨坊网站上收集了蜗牛，在斯科赫诺·克里克省的北埃尔科恩溪，蜗牛落下了Cercariae（n = 453），分配给温度治疗（10,13,15,18,20在北埃尔科恩溪的先前报道的季节性水温范围内，25和30摄氏度。蜗牛适应于3天的实验温度。然后在下一步7d下每天在0900小时下进行胰植物计数，并且为每只蜗牛计算平均7-D盲管释放。 PR的最小突出阈值温度。确定胰癌胰癌的盲肠释放为约13℃，而最小显影阈值温度在10至12℃之间。值得注意的是，胰腺释放随温度高达25℃，但在30摄氏度下下降（10）从10摄氏度间隔计算的值最大（13-23摄氏度）温度间隔（Q（10）= 16.1），并且在较高（15-25和20-30摄氏度）间隔（Q（ 10）= 4.3和Q（10）= 1.8）。蜗牛生存在合并的复制中，在10-D实验中的87.1至100％范围为87.1至100％，在30摄氏度下观察到的最低生存。这些结果是关于气候变化和全球变暖的讨论。

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