Gravid females of the little-known nematode species Philometra rubra ( Leidy, 1856 ) (Philometridae) are described from specimens from the abdominal cavity of the striped bass, Morone saxatilis (Walbaum), in South Carolina and Canada. The specimens were studied with the use of light and scanning electron microscopy. This species is mainly characterized by the distribution and different sizes of cephalic papillae from the external circle, which is a unique feature compared to other philometrids. Other characteristic features are the shape of the posterior end of body, size and location of caudal projections, and the presence of a well-developed anterior esophageal inflation. The morphology of the male of P. rubra and the life cycle of this nematode are still unknown.

• MeSH
• břišní dutina parazitologie   MeSH
• Dracunculoidea anatomie a histologie   klasifikace   MeSH
• infekce hlísticemi řádu Spirurida epidemiologie   parazitologie   veterinární   MeSH
• jezera MeSH
• nemoci ryb epidemiologie   parazitologie   MeSH
• Percoidea parazitologie   MeSH
• prevalence MeSH
• řeky MeSH
• zvířata MeSH
• Check Tag
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Jižní Karolína MeSH
• New Brunswick MeSH
• provincie Québec MeSH

Previously published multidisciplinary studies in the Miramichi and Bouctouche rivers (New Brunswick, Canada) noted significant changes in fish health parameters, including elevated tissue levels of organic contaminants and a wide range of physiological disturbances, in mummichog Fundulus heteroclitus (L.) from a site on the Miramichi River that received bleached kraft pulpmill and municipal effluent. The present study reports differences in the abundance of individual parasite species, as well as parasite infracommunity and component community composition, in mummichog from both rivers. These differences were evaluated in relation to host (size, condition, immune function, tissue organochlorine contaminant levels) and environmental (faecal coliform counts, salinity, temperature) data derived from the previously published studies. Overall, 18 parasite species were identified, the most common of which were Ascocotyle sp. larv., Ornithodiplostomum sp. larv., Posthodiplostomum sp. larv., and Proteocephalus filicollis (Rudolphi, 1802). There were broad differences in parasite community structure and composition between rivers and within rivers, the most prominent pattern being a pronounced difference between sites in the upper and lower estuary of each river that was likely driven by salinity. Mean infracommunity richness was also positively related to faecal coliforms (considered here as a surrogate measure of eutrophication via municipal sewage), and both were highest at the most polluted site. We noted no other significant relationships. Thus our data suggest that the parasite communities in these two estuaries were primarily structured by large upstream/downstream ecological gradients in salinity, and secondarily by eutrophication due to pollution by municipal and industrial effluents. Overall, our results highlight the value of coordinated multidisciplinary studies for understanding the factors that shape parasite abundance and community structure.

• MeSH
• demografie MeSH
• ekosystém MeSH
• Fundulidae MeSH
• lidské činnosti MeSH
• nemoci ryb epidemiologie   parazitologie   MeSH
• parazitární nemoci u zvířat epidemiologie   parazitologie   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Geografické názvy
• New Brunswick MeSH

• MeSH
• cestování MeSH
• dítě MeSH
• dospělí MeSH
• fagotypizace MeSH
• fágy salmonel * MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• pulzní gelová elektroforéza MeSH
• Salmonella enteritidis virologie   MeSH
• salmonelóza epidemiologie   mikrobiologie   MeSH
• senioři MeSH
• Check Tag
• dítě MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mladiství MeSH
• senioři MeSH
• Publikační typ
• časopisecké články MeSH
• Geografické názvy
• Česká republika MeSH
• Jamajka MeSH
• Kanada MeSH
• New Brunswick MeSH
• Nové Skotsko MeSH
• ostrov prince Edwarda MeSH