Impact of helminth infection on sexual morphology, reproduction and survival of the freshwater amphipod, Hyalella patagonica

IF 2.4 3区生物学 Q1 ZOOLOGY

Journal of invertebrate pathology Pub Date : 2025-09-09 DOI:10.1016/j.jip.2025.108453

Carlos Rauque, Verónica Flores

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Abstract

Effects of helminth infection on sexual morphology and reproduction of the crustacean intermediate host are not well understood. Therefore, in the present study, we investigated the effects of parasitic infections on the amphipod Hyalella patagonica. Specimens were collected from Lake Mascardi, Argentina, between spring 2018 and summer 2019. We focused on three parasites: the acanthocephalans Pseudocorynosoma enrietti and Acanthocephalus tumescens and the nematode Hedruris suttonae. Morphological alterations in sexual traits, pairing success, and survival rates were analyzed. Significant morphological alterations were induced by P. enrietti, including castration and mixed sexual characteristics. Hedruris suttonae was the parasite most frequently found in amphipods in precopula, indicating that this parasite does not affect pairing success. Reduced survival rates were found in amphipods infected with H. suttonae or co-infected with P. enrietti and A. tumescens. These findings underscore the varying pathogenic effects of parasites on amphipod hosts and highlight the importance of considering multiple factors when evaluating host-parasite interactions and their ecological consequences in aquatic ecosystems.

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寄生虫感染对淡水片足类巴塔哥尼亚透明藻性形态、繁殖和存活的影响。

蠕虫感染对甲壳类中间寄主性形态和繁殖的影响尚不清楚。因此，在本研究中，我们研究了寄生虫感染对片足类巴塔哥尼卡透明藻的影响。标本于2018年春季至2019年夏季期间从阿根廷马斯卡尔迪湖采集。我们重点研究了三种寄生虫：棘头虫、刺头虫、刺头虫和刺头线虫。分析了性性状、配对成功率和存活率的形态学变化。豚鼠的形态发生了明显的变化，包括去势和混合性征。在片脚类动物中最常见的寄生虫是suttonae，表明该寄生虫不影响配对成功。在片脚类动物中，感染了suttonae或同时感染了P. enrietti和A. tumescens的存活率降低。这些发现强调了寄生虫对片足类宿主的不同致病作用，并强调了在评估水生生态系统中宿主-寄生虫相互作用及其生态后果时考虑多种因素的重要性。

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来源期刊

Journal of invertebrate pathology 生物-动物学

CiteScore

6.10

自引率

5.90%

发文量

审稿时长

1 months

期刊介绍： The Journal of Invertebrate Pathology presents original research articles and notes on the induction and pathogenesis of diseases of invertebrates, including the suppression of diseases in beneficial species, and the use of diseases in controlling undesirable species. In addition, the journal publishes the results of physiological, morphological, genetic, immunological and ecological studies as related to the etiologic agents of diseases of invertebrates. The Journal of Invertebrate Pathology is the adopted journal of the Society for Invertebrate Pathology, and is available to SIP members at a special reduced price.