| effects of crude oils on the gastrointestinal parasites of two species of marine fish. | to assess the effect of crude oil on selected gastrointestinal parasites of fish, winter flounder (pseudopleuronectes americanus) naturally infected with a digenetic trematode (steringophorus furciger), were exposed to contaminated sediment or water soluble fractions of venezuelan crude oil for 34 and 160 days respectively. similarly, atlantic cod (gadus morhua) harboring an acanthocephalan (echinorhynchus gadi), were treated with extracts of hibernia and venezuelan oils for periods of 81 to 140 ... | 1983 | 6644923 |
| health of flatfish from localities in placentia bay, newfoundland, contaminated with petroleum and pcbs. | this study compared the health of flatfish inhabiting two areas in placentia bay, newfoundland, contaminated either with polycyclic aromatic hydrocarbons (pahs) or polychlorinated biphenyls (pcbs) with samples from reference sites. initially, four species of flatfish, including american plaice (hippoglossoides platessoides), yellowtail flounder (limanda ferruginea), gray sole (glyptocephalus cynoglossus), and winter flounder (pleuronectes americanus), were sampled only for external lesions from ... | 2003 | 12712279 |
| assessment of stress-related bioindicators in winter flounder (pleuronectes americanus) exposed to discharges from a pulp and paper mill in newfoundland: a 5-year field study. | this study assessed the effects of discharges from a sulphite-bleaching paper mill on winter flounder (pleuronectes americanus) sampled each spring over a 5-year period in st. george's bay, newfoundland, prior to foraging activity. the fish were captured by scuba divers near the mill and at a reference site 10 km up current. several bioindicators were used to assess fish health. larger and older flounder exhibiting gross and microscopic tissue lesions, lower condition factor, and elevated hepato ... | 2006 | 16485169 |
| influence of a thermal discharge on parasites of a cold-water flatfish, pleuronectes americanus, as a bioindicator of subtle environmental change. | a study was conducted to ascertain the influence of a thermal discharge on the health and parasites of a coastal cold-water flatfish, the winter flounder (pleuronectes americanus), a species sensitive to environmental change. flounder were sampled in spring 1998 and 1999 beneath the plume and at reference sites north and south up to 1 km from the discharge. species diversity and estimates of abundance of macroscopic algae, invertebrates, and fish were also recorded. after capture by scuba divers ... | 2007 | 18163365 |
| influence of sediment contaminated with untreated pulp and paper mill effluent on winter flounder, pleuronectes americanus. | this study was conducted to ascertain the influence of sediment contaminated with pulp and paper mill effluent in a fjord on winter flounder, pleuronectes americanus, based on a laboratory study. flounder, captured from a pristine site, were exposed in a flow-through system for 16 weeks to sediment collected at 2, 5, 7, and 10 km from the outfall. a group of controls was placed in uncontaminated sediment. mortality occurred almost exclusively in fish exposed to sediment taken from 2 km than from ... | 2010 | 19513782 |
| impact of a castrating trematode, neophasis sp., on the common whelk, buccinum undatum, in the northern gulf of st. lawrence. | we observed heavy trematode infections of whelks, buccinum undatum, from the mingan islands, eastern canada, by larval stages of a species of neophasis. only sexually mature whelks were infected, 23% of mature females and 15% of mature males, and prevalence increased rapidly with whelk size. in most cases the parasite completely occupied the gonad, causing castration. the digestive gland was also infected, although to a lesser degree (0% to 50% occupation), and a marked reduction in the mass of ... | 2000 | 10786946 |