高致病性禽流感会影响的运动和繁殖产量
Olivier Duriez1, Yohan Sassi1, Chloé Le Gall-Ladevèze2
1CEFE, University of Montpellier, CNRS, EPHE, IRD, 1919 Route de Mende, 34293 Montpellier, France.
Current biology : CB
|August 19, 2023
概括
在2022年爆发期间,高致病性禽流感 (HPAI) 在中引起了不寻常的不移动性和繁殖失败. 受感染的的运动减少,可能限制病毒的传播,但突出了危物种的风险.
科学领域:
- 鸟类学 鸟类学是一门学科.
- 兽医病毒学 兽医病毒学
- 野生动物生态生态学
背景情况:
- 自2021年秋季以来,全球高度致病性禽流感 (HPAI) 爆发,主要是H5N1类2.3.4.4.b,已经影响了鸟类种群.
- 虽然家禽和海鸟的死亡率已有记录,但HPAI对陆地鸟类的行为和空间影响,特别是繁殖期间,仍然不太清楚.
- 了解受感染的野生鸟类的移动对于评估向其他野生和家禽种群传播疾病的风险至关重要.
研究的目的:
- 为了研究感染HPAI的 (Gyps fulvus) 的运动模式和行为变化.
- 评估HPAI感染对繁殖成功率和生存率的影响.
- 评估改变行为在缓解野生鸟群内HPAI传播方面的潜在作用.
主要方法:
- 在四年 (2019-2022) 的时间里,长期GPS跟踪31只成年在法国两个地点.
- 从2022年开始,在HPAI爆发期间,与前三年的数据进行移动数据的比较.
- 对进行血清检测,以确认HPAI感染,并监测繁殖成功和死亡率.
主要成果:
- 在2022年春天,31只跟踪中的21只在巢中表现出显著的不动性,平均为5.6天.
- 血清学分析证实了两个人的HPAI感染;三只死亡,其余的恢复并恢复正常食.
- 至少有九只经历了繁殖失败,观察到的不动/死亡模式是前几年前所未有的,与天气无关.
结论:
- 灰熊的HPAI感染导致明显的不动行为,这可能会降低传播风险.
- 观察到的高死亡率和繁殖失败率表明,这种危物种对HPAI有很大的脆弱性.
- 需要进一步的研究来了解HPAI对种群及其生态作用的长期影响.
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