Parasite transmission in size-structured populations.
Parasite transmission in size-structured populations.
复制标题
寄生虫在规模结构人群中的传播。
DOI：
10.1002/ecy.4221
复制
发表时间：
2024
期刊：
影响因子：
4.8
通讯作者：
Civitello,DavidJ
中科院分区：
文献类型：
--
作者：
Shaw,KelseyE;Cloud,RebeccaE;Syed,Raeyan;Civitello,DavidJ
宿主异质性可以影响寄生虫的传播，但确定潜在的特征并将其纳入传播模型仍然具有挑战性。身体大小很容易测量，并影响许多生态相互作用，包括传播。在螺体系统中，较大的螺体对寄生虫的暴露较高，但对每种寄生虫的感染敏感性较低。我们通过在不同大小结构的蜗牛种群和竞争性大小依赖性传播模型中进行传播试验，量化了基于大小的异质性对种群水平传播的影响。具有较大比例的大蜗牛的人群具有较低的患病率，并且小蜗牛被共存的大同种保护而不受感染。此外，一个完全依赖的传输模型，将身体大小的曝光和易感性优于其他候选人考虑的模型。将受宿主生态影响并直接影响宿主生态的身体大小等性状纳入传播模型，可以深入了解许多系统中的自然动态和疾病缓解。
Host heterogeneity can affect parasite transmission, but determining underlying traits and incorporating them into transmission models remains challenging. Body size is easily measured and affects numerous ecological interactions, including transmission. In the snail–schistosome system, larger snails have a higher exposure to parasites but lower susceptibility to infection per parasite. We quantified the effect of size‐based heterogeneity on population‐level transmission by conducting transmission trials in differently size‐structured snail populations and competing size‐dependent transmission models. Populations with greater proportions of large snails had lower prevalence, and small snails were shielded from infection by co‐occurring large conspecifics. Furthermore, a fully dependent transmission model that incorporated body size in both exposure and susceptibility outperformed other candidate models considered. Incorporating traits such as body size, which are affected by and directly affect host ecology, into transmission models could yield insights into natural dynamics and disease mitigation in many systems.