PDF(Pubmed)
Abstract：
Immunity is an important component of invasion success since it enables invaders\' adaptation to conditions of the novel environment as they expand their range. Immune response of invaders may vary along the invasion range due to encountered parasites/microbial communities, conditions of the local environment, and ecological processes that arise during the range expansion. Here, we analyzed changes in the immune response along the invasion range of one of the most successful aquatic invaders, the signal crayfish, in the recently invaded Korana River, Croatia. We used several standard immune parameters (encapsulation response, hemocyte count, phenoloxidaze activity, and total prophenoloxidaze) to: i) compare immune response of the signal crayfish along its invasion range, and between species (comparison with co-occurring native narrow-clawed crayfish), and ii) analyze effects of specific predictors (water temperature, crayfish abundance, and body condition) on crayfish immune response changes. Immune response displayed species-specificity, differed significantly along the signal crayfish invasion range, and was mostly affected by water temperature and population abundance. Specific immune parameters showed density-dependent variation corresponding to increased investment in them during range expansion. Obtained results offer baseline insights for elucidating the role of immunocompetence in the invasion success of an invertebrate freshwater invader.
摘要：
免疫力是入侵成功的重要组成部分，因为它使入侵者能够适应新环境的条件，因为它们扩大了范围。由于遇到的寄生虫/微生物群落，入侵者的免疫反应可能会随着入侵范围而变化。当地环境条件,以及范围扩展过程中出现的生态过程。这里,我们分析了最成功的水生入侵者之一在入侵范围内的免疫反应变化，信号小龙虾，在最近入侵的Korana河里，克罗地亚。我们使用了几个标准免疫参数(封装反应，血细胞计数,酚氧化活性，和总酚氧化原）以：i）比较信号小龙虾沿其入侵范围的免疫反应，和物种之间（与同时发生的本地窄爪小龙虾相比），和ii)分析特定预测因子的影响(水温，小龙虾丰富，和身体状况）对小龙虾免疫反应的变化。免疫反应显示物种特异性，在信号小龙虾入侵范围上差异显著，主要受水温和人口丰度的影响。特定的免疫参数显示出密度依赖性变化，这与范围扩大期间对它们的投资增加相对应。获得的结果为阐明免疫能力在无脊椎动物淡水入侵者入侵成功中的作用提供了基线见解。
