PDF(Pubmed)
Abstract：
The microbiota in fish external mucus is mainly known for having a role in homeostasis and protection against pathogens, but recent evidence suggests it is also involved in the host-specificity of some ectoparasites. In this study, we investigated the influence of seasonality and environmental factors on both fish external microbiota and monogenean gill ectoparasites abundance and diversity and assessed the level of covariations between monogenean and bacterial communities across seasons. To do so, we assessed skin and gill microbiota of two sparid species, Oblada melanura and Diplodus annularis, over a year and collected their specific monogenean ectoparasites belonging to the Lamellodiscus genus.
Our results revealed that diversity and structure of skin and gill mucus microbiota were strongly affected by seasonality, mainly by the variations of temperature, with specific fish-associated bacterial taxa for each season. The diversity and abundance of parasites were also influenced by seasonality, with the abundance of some Lamellodiscus species significantly correlated to temperature. Numerous positive and negative correlations between the abundance of given bacterial genera and Lamellodiscus species were observed throughout the year, suggesting their differential interaction across seasons.
The present study is one of the first to demonstrate the influence of seasonality and related abiotic factors on fish external microbiota over a year. We further identified potential interactions between gill microbiota and parasite occurrence in wild fish populations, improving current knowledge and understanding of the establishment of host-specificity.
Our results revealed that diversity and structure of skin and gill mucus microbiota were strongly affected by seasonality, mainly by the variations of temperature, with specific fish-associated bacterial taxa for each season. The diversity and abundance of parasites were also influenced by seasonality, with the abundance of some Lamellodiscus species significantly correlated to temperature. Numerous positive and negative correlations between the abundance of given bacterial genera and Lamellodiscus species were observed throughout the year, suggesting their differential interaction across seasons.
The present study is one of the first to demonstrate the influence of seasonality and related abiotic factors on fish external microbiota over a year. We further identified potential interactions between gill microbiota and parasite occurrence in wild fish populations, improving current knowledge and understanding of the establishment of host-specificity.
摘要：
背景：鱼类外部粘液中的微生物群主要以在稳态和对病原体的保护中起作用而闻名，但是最近的证据表明，它也与某些体外寄生虫的宿主特异性有关。在这项研究中,我们调查了季节性和环境因素对鱼类外部微生物群和单系g外寄生虫丰度和多样性的影响，并评估了单系和细菌群落之间跨季节的协变水平。要做到这一点，我们评估了两个sparid物种的皮肤和g微生物群，黑色黑色和环状二倍体，一年多，并收集了属于Lamellodiscus属的特定单系外寄生物。
结果：我们的结果表明，皮肤和g粘液微生物群的多样性和结构受到季节性的强烈影响，主要是温度的变化，每个季节都有特定的鱼类相关细菌类群。寄生虫的多样性和丰度也受到季节性的影响，一些Lamellodiscus物种的丰度与温度显着相关。全年观察到给定细菌属的丰度与Lamellodiscus物种之间存在许多正相关和负相关，表明它们在不同季节的不同相互作用。
结论：本研究是首次证明季节性和相关非生物因素对一年以上鱼类外部微生物群的影响的研究之一。我们进一步确定了在野生鱼类种群中，g微生物群和寄生虫发生之间的潜在相互作用。提高对宿主特异性建立的现有知识和理解。
结果：我们的结果表明，皮肤和g粘液微生物群的多样性和结构受到季节性的强烈影响，主要是温度的变化，每个季节都有特定的鱼类相关细菌类群。寄生虫的多样性和丰度也受到季节性的影响，一些Lamellodiscus物种的丰度与温度显着相关。全年观察到给定细菌属的丰度与Lamellodiscus物种之间存在许多正相关和负相关，表明它们在不同季节的不同相互作用。
结论：本研究是首次证明季节性和相关非生物因素对一年以上鱼类外部微生物群的影响的研究之一。我们进一步确定了在野生鱼类种群中，g微生物群和寄生虫发生之间的潜在相互作用。提高对宿主特异性建立的现有知识和理解。
