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Title: | Sharing is caring? Barcoding suggests co-introduction of dactylogyrid monogeneans with Nile tilapia and transfer towards native tilapias in sub-Saharan Africa | Authors: | GERAERTS, Mare Huyse, Tine Barson, Maxwell Bassirou, Hassan Bilong, Charles F. Bilong Nyom, Arnold R. Bitja Manda, Auguste Chocha CRUZ LAUFER, Armando Kasembele, Gyrhaiss Kapepula Bukinga, Fidel Muterezi Njom, Samuel VAN STEENBERGE, Maarten ARTOIS, Tom VANHOVE, Maarten |
Issue Date: | 2023 | Publisher: | ELSEVIER SCI LTD | Source: | INTERNATIONAL JOURNAL FOR PARASITOLOGY, 53 (13) , p. 711 -730 | Abstract: | Invasive Nile tilapias negatively impact native tilapia species through hybridisation and competition. However, the co-introduction of parasites with Nile tilapia, and subsequent changes in parasite communities, are scarcely documented. Monogeneans are known pathogens of cultured Nile tilapia, although little is known about their fate once Nile tilapias establish in new ecosystems. We investigate the parasitological consequences of Nile tilapia introduction on native tilapias in basins in Cameroon, the Democratic Republic of the Congo (DRC), and Zimbabwe, focusing on ectoparasitic dactylogyrids (Monogenea). Using the mitochondrial cytochrome oxidase c subunit I (COI) and nuclear 18S-internal transcribed spacer 1 (18S-ITS1) rDNA region of 128 and 166 worms, respectively, we evaluated transmission of several dactylogyrid species. Parasite spillover from Nile tilapia was detected for Cichlidogyrus tilapiae to Coptodon guineensis in Cameroon, Cichlidogyrus thurstonae to Oreochromis macrochir in the DRC, and Cichlidogyrus halli and C. tilapiae to Coptodon rendalli in Zimbabwe. Parasite spillback to Nile tilapia was detected for Cichlidogyrus papernastrema and Scutogyrus gravivaginus from Tilapia sparrmanii and Cichlidogyrus dossoui from C. rendalli or T. sparrmanii in the DRC, and Cichlidogyrus chloeae from Oreochromis cf. mortimeri and S. gravivaginus from O. macrochir in Zimbabwe. 'Hidden' transmissions (i.e. transmission of certain parasite lineages of species that are naturally present on both alien and native hosts) were detected for C. tilapiae and Scutogyrus longicornis between Nile tilapia and Oreochromis aureus and C. tilapiae between Nile tilapia and Oreochromis mweruensis in the DRC, and Cichlidogyrus sclerosus and C. tilapiae between Nile tilapia and O. cf. mortimeri in Zimbabwe. A high density of Nile tilapia occurring together with native tilapias, and the broad host range and/or environmental tolerance of the transmitted parasites, are proposed as factors behind parasite transmission through ecological fitting. However, continuous monitoring and the inclusion of environmental variables are necessary to understand the long-term consequences of these transmissions on native tilapias and to elucidate other underlying factors influencing these transmissions. (c) 2023 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved. | Notes: | Geraerts, M (corresponding author), Hasselt Univ, Fac Sci, Ctr Environm Sci, Res Grp Zool Biodivers & Toxicol, B-3590 Diepenbeek, Belgium. mare.geraerts@uhasselt.be |
Keywords: | Nile tilapia;Invasive species;Monogenea;Cichlidogyrus;Parasite transmission;Host switching | Document URI: | http://hdl.handle.net/1942/42020 | ISSN: | 0020-7519 | e-ISSN: | 1879-0135 | DOI: | 10.1016/j.ijpara.2023.05.007 | ISI #: | 001112356400001 | Rights: | 2023 Australian Society for Parasitology. Published by Elsevier Ltd. All rights reserved. | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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Sharing is caring_ Barcoding suggests co-introduction of dactylogyrid monogeneans with Nile tilapia and transfer towards native tilapias in sub-Saharan Africa.pdf Restricted Access | Published version | 4.29 MB | Adobe PDF | View/Open Request a copy |
4EIIv2rQRoT8U8nNUJOjGs.pdf | Peer-reviewed author version | 368.06 kB | Adobe PDF | View/Open |
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