Recruitment and Seasonal Occurrence of Parasites in Juvenile Invasive Round Gobies (Neogobius melanostomus) in the St. Lawrence River, Quebec, Canada

David J. Marcogliese

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Recruitment and Seasonal Occurrence of Parasites in Juvenile Invasive Round Gobies (Neogobius melanostomus) in the St. Lawrence River, Quebec, Canada

机译：Recruitment and Seasonal Occurrence of Parasites in Juvenile Invasive Round Gobies (Neogobius melanostomus) in the St. Lawrence River, Quebec, Canada

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The round goby (Neogobius melanostomus) is an invasive species that has become one of the most abundant fish in the St. Lawrence River, Quebec, Canada over the past 15 yr. Since its introduction, the round goby has acquired a number of native parasites, yet little is known about the dynamics of parasite recruitment. To examine this question, young-of-the-year and juvenile round gobies were collected monthly from 2 localities in the river (Iles de la Paix, Ile Dorval) from June through November 2012.At Iles de la Paix, round gobies (n = 180) were infected with 3 species of parasites, all larval stages (Diplostomum spp., Tylodelphys scheuringi, Neoechinorhynchus tenellus). Prevalence of the digenean Diplostomum spp. varied from 3.3 to 13.3%, and meanabundance from 0.03 to 0.53 from June through September, with a maximum in August. The digenean T. scheuringi was seen only in August, at a prevalence of 10.0% and a mean abundance of 0.53. The acanthocephalan N. tenellus was observed in June, August, and September, prevalence ranging from 3.3 to 10.0% and mean abundance from 0.03 to 0.27. Maximum infection for all 3 species occurred in August. All infected fish were >=44 mm in total length (TL). Fish infected with more than 1 parasite species were >60mm TL. No round goby (n = 178) was infected at Ile Dorval. This study demonstrated that the invasive round goby starts to acquire parasite infections in the St. Lawrence River in the first year of life and may contribute to the transmission of some parasites within this ecosystem.

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《Journal of Parasitology》 |2022年第6期|337-342|共6页
作者
David J. Marcogliese;
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作者单位

Aquatic Contaminants Research Division, Water Science and Technology Directorate, Science and Technology Branch, Environment and Climate Change Canada, St. Lawrence Centre, 105 McGill Street, 7th floor, Montreal, Quebec H2Y 2E7, Canada and St. Andrew;

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正文语种英语
中图分类寄生动物、寄生虫学;寄生虫病;医学寄生虫学;
关键词
Fish; helminth parasites; invasive species; young-of-the-year; freshwater; Diplostomum spp.; Tylodelphys scheuringi; Neoechinorhynchus tenellus;

Recruitment and Seasonal Occurrence of Parasites in Juvenile Invasive Round Gobies (Neogobius melanostomus) in the St. Lawrence River, Quebec, Canada

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