Infection intensity and molecular characterization of eye flukes in round gobies (Neogobius melanostomus).
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
The round goby (Neogobius melanostomus) is an invasive species to the Baltic Sea and is rapidly expanding its range. Apart from competition with native fish, a novel species may face, or introduce, pathogens. Previous research has shown that round gobies have a high infection rate by eye flukes of the Diplostomum genus. To study prevalence and infection intensity of Diplostomum parasites in fish in an area recently colonized by round gobies, the shallow water community of round goby, common bleak (Alburnus alburnus) and three-spined stickleback (Gasterosteus aculeatus) was examined. The fish were screened for presence of parasites in the lenses of caught fish, and abundance of parasites was compared between the host species. The round goby had the highest infection intensity of the host species, and there was no difference in infection intensity between the common bleak and three spined stickleback. To support microscopy-based identification, the parasites from the round gobies were determined to genus/species level using molecular detection and sequencing, enabling a Diplostomum species composition inventory in round gobies. Results showed that at least three species of Diplostomum infected round gobies in this population, and that there was a negative correlation between body condition and the parasite intensity indicating fitness effects resulting from infection.
Place, publisher, year, edition, pages
2017. , 13 p.
Diplostomum, Eye fluke, Round goby, Neogobius melanostomus, infection, molecular characterization, invasive species, Baltic Sea
IdentifiersURN: urn:nbn:se:lnu:diva-61446OAI: oai:DiVA.org:lnu-61446DiVA: diva2:1082536
Subject / course
Biology Programme, 180 credits
Waldenström, Jonas, Professor
Per, Larsson, Professor