• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Parasitology >Development and availability of the free-living stages of Ostertagia gruehneri, an abomasal parasite of barrenground caribou (Rangifer tarandus groenlandicus), on the Canadian tundra
【24h】

Development and availability of the free-living stages of Ostertagia gruehneri, an abomasal parasite of barrenground caribou (Rangifer tarandus groenlandicus), on the Canadian tundra

机译：加拿大苔原上贫瘠的北美驯鹿（Rangifer tarandus groenlandicus）的一种腹部寄生虫Ostertagia gruehneri自由生活阶段的开发和可用性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Climate change in the Arctic is anticipated to alter the ecology of northern ecosystems, including the transmission dynamics of many parasite species. One parasite of concern is Ostertagia gruehneri, an abomasal nematode of Rangifer ssp. that causes reduced food intake, weight loss, and decreased pregnancy rates in reindeer. We investigated the development, availability, and overwinter survival of the free-living stages of O. gruehneri on the tundra. Fecal plots containing O. gruehneri eggs were established in the Northwest Territories, Canada under natural and artificially warmed conditions and sampled throughout the growing season of 2008 and the spring of 2009. Infective L3 were present 3-4 weeks post-establishment from all trials under both treatments, except for the trial established 4 July 2008 under warmed conditions wherein the first L3 was recovered 7 weeks post-establishment. These plots were exposed to significantly more time above 30°C than the natural plots established on the same date, suggesting a maximum temperature threshold for development. There was high overwinter survival of L2 and L3 across treatments and overwintering L2 appeared to develop to L3 the following spring. The impact of climate change on O. gruehneri is expected to be dynamic throughout the year with extreme maximum temperatures negatively impacting development rates.
机译：预计北极的气候变化将改变北部生态系统的生态，包括许多寄生虫物种的传播动态。引起关注的一个寄生虫是Ostertagia gruehneri，它是Rangifer ssp的一个正产线虫。这会导致食物摄入减少，体重减轻以及驯鹿的怀孕率降低。我们调查了苔原上O. gruehneri自由生活阶段的发育，可用性和越冬存活。在自然和人工加热的条件下，在加拿大西北地区建立了含有O. gruehneri卵的粪便样地，并在2008年整个生长季节和2009年春季进行了采样。在所有试验中，感染性L3在建立后3-4周出现除2008年7月4日在温暖的条件下建立的试验（第一个L3在建立后7周恢复）外，这两种治疗均无效。与相同日期建立的自然小区相比，这些小区在30°C以上的时间暴露的时间长得多，这表明开发的最高温度阈值。 L2和L3在所有处理中都有较高的越冬存活率，并且越冬L2似乎在第二年春天发展为L3。预计全年气候变化对格氏hn的影响是动态的，极端的最高温度会对发展速度产生负面影响。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号