| long-term and seasonal changes in composition and richness of intestinal helminth communities in eels anguilla anguilla of an isolated english river. | the need for more long-term studies on helminth communities was addressed by examining changes in composition and diversity of the intestinal helminth component and infracommunities in eels of a small isolated river over 12 years. examination of samples over one summer season indicated that single samples were representative of community richness in that year. in 1985 the community was species poor (1 species only) and with zero diversity, but by 1996 it comprised six species and all parameters ... | 1997 | 9437839 |
| hepatic 7-ethoxyresorufin o-deethylase activity in eel (anguilla anguilla) from the thames estuary and comparisons with other united kingdom estuaries. | hepatic microsomal 7-ethoxyresorufin o-deethylase (erod) activities (indicative of exposure to polycyclic aromatic hydrocarbons (pahs) and polychlorobiphenyls (pcbs)) were measured in eel anguilla anguilla from the thames estuary. fish were collected from up to 13 sites during november 1997, may and august 1998 and october 1999. throughout this period no clear seasonal variation could be identified at every site along the thames. however, during the summer months, fish sampled from sites in the ... | 2001 | 11827118 |
| pcb and organochlorine pesticide burden in eels in the lower thames river (uk). | thirty-five european eels (anguilla anguilla), caught in 2007 in the river thames upstream and downstream of both london and the tidal limit, were analysed for pcbs and organochlorine pesticides. most chemicals were detectable in every fish, although they have been banned or severely restricted for many years. in general, the tidal eels were more contaminated than upstream ones, which was related to their higher lipid contents. the ices7 indicator pcb concentrations ranged overall from 4.2 to 12 ... | 2015 | 25078785 |
| the presence of eu priority substances mercury, hexachlorobenzene, hexachlorobutadiene and pbdes in wild fish from four english rivers. | since 2007 about 200 to 300 fish per year--generally roach (rutilus rutilus) also a few bleak (alburnus alburnus) and eels (anguilla anguilla)--have been collected from a number of english river sites and stored at -80°c to build up a fish tissue archive as a resource for the monitoring of pollutants. some of the fish from the fish tissue archive from the years 2007-2011 were analyzed for substances in current and proposed european legislation regarding environmental quality standards (eqs) in b ... | 2013 | 23747559 |
| patterns of infracommunity species richness in eels, anguilla anguilla. | between october 1999 and october 2001, a total of 510 european eels anguilla anguilla were captured in 13 different samples from the rivers thames (five locations) and test (one location) in southern england. the relationship between parasite component community species richness (ccr) and maximum infracommunity species richness (icrmax) compared with that previously observed in bird and mammal hosts. specifically, the maximum number of parasite species occurring in infracommunities equalled or e ... | 2004 | 15153286 |
| metallothionein in liver of eels anguilla anguilla from the thames estuary: an indicator of environmental quality? | the purpose of this study was to examine the role of the cysteine-rich protein metallothionein (mt) in the detoxification and metabolism of metals in livers of eels anguilla anguilla from the thames estuary, and to assess the value of mt measurements in environmental monitoring. hepatic mt levels and associated metal concentrations were determined in a. anguilla collected on three occasions during 1998 at sites along the tidal thames (from freshwater to the sea) and also from a reference site (t ... | 2002 | 11939293 |
| bile metabolites of polycyclic aromatic hydrocarbons in three species of fish from the severn estuary. | six metabolites of polycyclic aromatic hydrocarbons (pahs) were identified and quantified from the bile of 31 common eels (anguilla anguilla), 29 european flounders (pleuronectes flesus), and 15 conger eels (conger conger) collected from the severn estuary and bristol channel during 1997. the bile metabolites were deconjugated by enzymatic hydrolysis and separated by reverse-phase hplc with fluorescence detection. the major metabolite present in all fish was 1-hydroxy pyrene (75-94% of all metab ... | 2002 | 11886183 |
| epidemiology of anguillicola crassus in the european eel (anguilla anguilla) from two rivers in southern england. | european eels anguilla anguilla from the rivers thames and test, in the south of england, were examined between 2000 and 2003 for infection with the swim-bladder nematode anguillicola crassus. since its introduction to thames eels at tidal estuarine locations circa 1987, a. crassus has become established in non-tidal freshwater stretches upriver and data from these locations are reported for the first time. the prevalence of infection at thames estuary locations was higher during 2000-2003 than ... | 2005 | 15977905 |
| an investigation into the prevalence of renibacterium salmoninarum in farmed rainbow trout, oncorhynchus mykiss (walbaum), and wild fish populations in selected river catchments in england and wales between 1998 and 2000. | a cross-sectional survey of renibacterium salmoninarum infection in farmed rainbow trout (rbt) and wild fish populations was carried out in 10 farms and six river catchments, respectively, in england and wales. the majority of the wild fish were sampled in 1998 and the farmed fish in 2000. grayling, thymallus thymallus, and brown trout, salmo trutta, were the main wild species sampled. two fish, one grayling and one salmon, salmo salar, were r. salmoninarum culture-positive, compared with 40 con ... | 2008 | 18234016 |
| colonization and establishment of pomphorhynchus laevis (acanthocephala) in an isolated english river. | the successful colonization, establishment and spread of pomphorhynchus laevis in a small, isolated, devon river 128 km from the parasite's nearest focus in dorset was followed over 11 years from 1985. the parasite was first detected in anguilla anguilla and platichthys flesus in 1988: by 1995 it had attained prevalence levels of 22.6% in a. anguilla and 43.6% in p. flesus and also occurred in 100% salmo trutta, 50% cottus gobio and noemacheilus barbatulus. as judged by prevalence, abundance, pr ... | 1996 | 8991914 |