上卢阿拉巴河流域（刚果民主共和国）鱼类寄生单殖吸虫的首次记录：寄生在 O. mweruensis、C. rendalli 和 S. macrocephalus（硬骨鱼纲：慈鲷科）的指环虫和 gyrodactylids。

First record of monogenean fish parasites in the Upper Lufira River Basin (Democratic Republic of Congo): dactylogyrids and gyrodactylids infesting Oreochromis mweruensis, Coptodon rendalli and Serranochromis macrocephalus (Teleostei: Cichlidae).

机构信息

Unité de Recherche en Biodiversité et Exploitation durable des Zones Humides (BEZHU), Faculté des Sciences Agronomiques, Université de Lubumbashi, Haut-Katanga, Democratic Republic of Congo.

Department of Biology, Royal Museum for Central Africa, Leuvensesteenweg 13, 3080, Tervuren, Belgium.

出版信息

Parasit Vectors. 2023 Feb 2;16(1):48. doi: 10.1186/s13071-022-05637-5.

DOI:10.1186/s13071-022-05637-5

PMID:36732829

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9893698/

Abstract

BACKGROUND

Monogenean parasites have never been formally reported on fishes from the Lufira River Basin. In this context, we decided to record the monogenean parasite fauna of three cichlid species found in the Upper Lufira River Basin for the first time by inventorizing their diversity (species composition) and analysing their infection parameters (prevalence, mean intensity and abundance).

METHODS

The African cichlid fishes Oreochromis mweruensis, Coptodon rendalli and Serranochromis macrocephalus were selected for the study, given their economic value and their abundance in the Upper Lufira River Basin. Monogeneans were isolated from the gills and stomach, mounted on glass slides with either Hoyer's medium or ammonium picrate-glycerin for identification under a stereomicroscope, based on morphological analysis of genital and haptoral hard parts. Indices of diversity and infections parameters were calculated.

RESULTS

A total of 13 gill monogenean parasite species (Cichlidogyrus dossoui, C. halli, C. karibae, C. mbirizei, C. papernastrema, C. quaestio, C. sclerosus, C. tiberianus, C. tilapiae, C. zambezensis, Scutogyrus gravivaginus, S. cf. bailloni and Gyrodactylus nyanzae) and one stomach monogenean (Enterogyrus malmbergi) were identified. A species richness (S) of 10 for O. mweruensis, S = 6 for C. rendalli and S = 2 for S. macrocephalus was recorded. Five parasite species were reported to be common amongst O. mweruensis and C. rendalli. According to cichlid species, the most prevalent parasite species was C. halli (prevalence [P] = 80.9%) on O. mweruensis, C. dossoui (P = 92.9%) on C. rendalli and C. karibae and C. zambezensis (both P = 9.1%) on S. macrocephalus. The parasite species with the highest mean intensity (MI) were G. nyanzae (MI = 8.7) on O. mweruensis, C. papernastrema (MI = 17.1) on C. rendalli and C. karibae (MI = 15) on S. macrocephalus. The findings indicate new host ranges for five parasites species (C. quaestio, S. cf. bailloni, E. malmbergi on O. mweruensis, C. halli on C. rendalli and C. karibae on S. macrocephalus) as well as new geographical records for all of them as they are recorded for the first time in the Lufira River Basin.

CONCLUSIONS

This study highlighted the richness of monogenean communities in the Upper Lufira River Basin and is a starting point for future helminthological studies, such as on the use of fish parasites as indicators of anthropogenic impacts.

摘要

背景

以前从未在卢菲拉河流域的鱼类中正式报道过单殖吸虫寄生虫。在这种情况下，我们决定首次记录在上卢菲拉河流域发现的三种慈鲷鱼类的单殖吸虫寄生虫群，通过对其多样性（物种组成）进行编目，并分析其感染参数（流行率、平均强度和丰度）。

方法

选择经济价值高且在上卢菲拉河流域丰富的非洲慈鲷鱼类 Oreochromis mweruensis、Coptodon rendalli 和 Serranochromis macrocephalus 进行研究。通过在立体显微镜下基于生殖器和固着器硬部的形态分析，从鳃和胃中分离出单殖吸虫，并用 Hoyer 介质或苦味酸-甘油铵将其安装在载玻片上进行鉴定。计算多样性指数和感染参数。

结果

共鉴定出 13 种鳃单殖吸虫寄生虫（Cichlidogyrus dossoui、C. halli、C. karibae、C. mbirizei、C. papernastrema、C. quaestio、C. sclerosus、C. tiberianus、C. tilapiae、C. zambezensis、Scutogyrus gravivaginus、S. cf. bailloni 和 Gyrodactylus nyanzae）和 1 种胃单殖吸虫（Enterogyrus malmbergi）。记录到 O. mweruensis 的物种丰富度（S）为 10，C. rendalli 的 S 为 6，S. macrocephalus 的 S 为 2。有 5 种寄生虫被报道为 O. mweruensis 和 C. rendalli 所共有。根据慈鲷种类，最流行的寄生虫种类是 O. mweruensis 上的 C. halli（流行率 [P] = 80.9%），C. rendalli 上的 C. dossoui（P = 92.9%）和 S. macrocephalus 上的 C. karibae 和 C. zambezensis（两者 P = 9.1%）。平均强度（MI）最高的寄生虫物种是 G. nyanzae（MI = 8.7）在 O. mweruensis 上，C. papernastrema（MI = 17.1）在 C. rendalli 上和 C. karibae（MI = 15）在 S. macrocephalus 上。研究结果表明，有五种寄生虫（C. quaestio、S. cf. bailloni、E. malmbergi 在 O. mweruensis 上，C. halli 在 C. rendalli 上和 C. karibae 在 S. macrocephalus 上）有新的宿主范围，以及所有这些寄生虫都有新的地理记录，因为它们是首次在卢菲拉河流域记录的。