Abstract：
In salt marsh ecosystems, daggerblade grass shrimp, Palaemon (Palaemonetes) pugio, play a crucial role in food webs and serve as the definitive host for the bopyrid isopod Probopyrus pandalicola. These ectoparasites infest the branchial chambers of grass shrimp, which can lead to decreased energy availability and sterilization of infected hosts. Although bopyrid isopod infestation of daggerblade grass shrimp has been frequently reported in literature from coastal marshes of the southeastern United States, the prevalence of this parasite has not been recently documented in daggerblade grass shrimp from marshes of the northeastern United States. The goal of this project was to quantify the prevalence of Pr. pandalicola infestations in Pa. pugio across Cape Cod, Massachusetts. We evaluated bopyrid isopod prevalence from shrimp collected from 5 different salt marsh habitats along Cape Cod in August 2021. Bopyrid isopod infestations were found in shrimp at 4 of 5 salt marshes, with prevalence ranging from 0.04 to 14.1%. Seasonal resampling of one of the salt marshes revealed the highest average infestation prevalence in spring (<17.1%) and an isolated high of 30.3% prevalence in a single salt panne. A series of linear and multivariate models showed that panne area, shrimp abundance, and distance to shoreline were related to Pr. pandalicola shrimp infestations in salt pannes in summer. This study describes the prevalence of the bopyrid isopod infesting daggerblade grass shrimp in salt marshes in New England, with implications for how parasitized shrimp influence salt marsh food webs in which they are found.
摘要：
在盐沼生态系统中，匕首草虾，Palaemon（Palaemonetes）pugio，在食物网中发挥着至关重要的作用，并作为bopyrid等足类Propopyruspandalicola的最终宿主。这些体外寄生虫感染草虾的分支室，这可能导致能量可用性下降和被感染宿主的灭菌。尽管在美国东南部沿海沼泽地的文献中经常报道了麦草虾的bopyrid等足类侵染，这种寄生虫的流行最近没有在美国东北部沼泽地的麦草虾中记录。该项目的目标是量化Pr的患病率。宾夕法尼亚州的pandalicola感染。穿过科德角的Pugio,马萨诸塞州。我们于2021年8月评估了从科德角沿岸5种不同盐沼栖息地收集的虾中的bopyrid等足类动物的患病率。在5个盐沼中的4个的虾中发现了Bopyrid等足类感染，患病率为0.04至14.1%。对其中一个盐沼进行季节性重新采样显示，春季平均侵染患病率最高（<17.1％），而单个盐田的患病率高达30.3％。一系列线性和多变量模型表明，panne区域，虾丰富，到海岸线的距离与Pr有关。pandalicola虾在夏季的盐pannes感染。这项研究描述了新英格兰盐沼中bopyrid等足类动物侵染麦草虾的患病率，对被寄生的虾如何影响发现它们的盐沼食物网。
