Botfly infections impair the aerobic performance and survival of montane populations of deer mice, Peromyscus maniculatus rufinus
Botfly infections impair the aerobic performance and survival of montane populations of deer mice, Peromyscus maniculatus rufinus
复制标题
马蝇感染会损害山区鹿鼠 Peromyscus maniculatus rufinus 的有氧性能和生存能力
DOI：
10.1111/1365-2435.13276
复制
发表时间：
2019
影响因子：
5.2
通讯作者：
White, ed., Craig
中科院分区：
文献类型：
--
作者：
Wilde, Luke R.;Wolf, Cole J.;Porter, Stephanie M.;Stager, Maria;Cheviron, Zachary A.;Senner, Nathan R.;White, ed., Craig
1高程>2，000米代表了持续的恶劣环境，因为非生物的压力，如寒冷的温度和缺氧。2这些环境压力可能会限制生活在这些海拔的人口的能力，以应对生物选择压力，如寄生虫或病原体，在其他环境背景下，只会施加最小的能源和健身相关的成本。3我们研究了鹿鼠（Peromyscus maniculatus rufinus）生活在沿着两个海拔样带（2，300 - 4，400 m）在科罗拉多落基山脉，并发现感染流行的马蝇幼虫（Cuterebridae）下降在较高的海拔。我们没有发现在海拔>2,400米的地方感染的证据，但是在海拔<2,400米的地方，33.6%的鹿鼠和52.2%的成年鹿鼠被感染。与未感染的个体相比，Botfly感染与红细胞压积水平降低23%、血红蛋白浓度降低27%和冷诱导的VO 2 max测量值降低19%相关。反过来，这些有氧能力的降低似乎会影响健康，因为感染的个体表现出19-34%的每日存活率降低。5与低海拔地区的研究相反，我们发现的证据表明，马蝇感染会影响生活在海拔2,000米至2,400米之间的鹿鼠的有氧能力和健康。因此，我们的研究结果表明，马蝇和小型啮齿动物之间的相互作用可能是高度依赖于上下文，更一般地说，高海拔人口可能容易受到额外的生物选择压力。
1Elevations >2,000 m represent consistently harsh environments for small endoCollege therms because of abiotic stressors such as cold temperatures and hypoxia.2These environmental stressors may limit the ability of populations living at these elevations to respond to biotic selection pressures—such as parasites or pathogens—that in other environmental contexts would impose only minimal energeticand fitness-related costs.3We studied deer mice (Peromyscus maniculatus rufinus) living along two elevational transects (2,300–4,400 m) in the Colorado Rockies and found that infection prevalence by botfly larvae (Cuterebridae) declined at higher elevations. We found no evidence of infections at elevations >2,400 m, but that 33.6% of all deer mice, and 52.2% of adults, were infected at elevations <2,400 m.4Botfly infections were associated with reductions in haematocrit levels of 23%, haemoglobin concentrations of 27% and cold-induced VO2maxmeasures of 19% compared to uninfected individuals. In turn, these reductions in aerobic performance appeared to influence fitness, as infected individuals exhibited 19-34% lower daily survival rates.5In contrast to studies at lower elevations, we found evidence indicating that botfly infections influence the aerobic capabilities and fitness of deer mice living at elevations between 2,000 and 2,400 m. Our results therefore suggest that the interaction between botflies and small rodents is likely highly context-dependent and that, more generally, high-elevation populations may be susceptible to additional biotic selection pressures.