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Found 10 records similar to Variation in parasite communities in Spottail Shiners (Notropis hudsonius) linked with precipitation

Federal

Parasite communities were examined in Johnny Darters (Etheostoma nigrum) collected from five localities in the St. Lawrence River in southwestern Quebec: two reference localities, one polluted locality upstream of the Island of Montreal and downstream of industrial and agricultural activity, and two polluted localities downstream of the Island of Montreal in the plume from the wastewater treatment facility. Fish from the upstream polluted locality had the highest parasite species richness and total parasite numbers, and fish from the downstream polluted localities the lowest. Differences between reference and polluted localities were mainly due to higher abundances of the brain-encysting trematode, Ornithodiplostomum sp., at the reference localities. Differences between upstream and downstream polluted localities were mainly due to a higher diversity and abundance of trematodes in fish at the upstream locality

Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

Last Updated: Feb. 5, 2019
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Johnny Darter (Etheostoma nigrum), Fish, parasite communities, St. Lawrence Action Plan (SLAP), St. Lawrence River, Parasites, Environment, Biota, Nature and Biodiversity - Contaminants
Federal

Increased productivity from sewage effluents can enhance species richness locally. Results from a study of Spottail shiners (Notropis hudsonius) in 1999 showed that prevalence and the mean number of myxozoan parasite species per host were higher downstream of the wastewater outflow from the Island of Montreal than upstream in the St. Lawrence River, Quebec, Canada. This was attributed to organic enrichment of the sediments which presumably lead to increased densities of oligochaetes, the alternate hosts, downstream of Montreal. Spottail shiners subsequently were collected every August/early September in 2001–2004 to examine the stability and repeatability of these patterns.

Last Updated: Jul. 28, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Spottail Shiner (Notropis hudsonius), Fish, parasite communities, Myxozoans, St. Lawrence Action Plan (SLAP), St. Lawrence River, Parasites, Environment, Biota
Federal

In this study, seven non‐specific biomarkers were compared in Spottail Shiners (Notropis hudsonius Clinton) from localities receiving urban and industrial effluents and relatively clean localities in the St Lawrence River, Canada. Pigmented macrophages are involved in a variety of functions including the detoxification and recycling of exogenous and endogenous material, responses to foreign material or infectious agents, and antigen recognition. Pigmented macrophage aggregates are focal accumulations of pigmented macrophages found in the spleen, kidney, liver and other organs of fishes. They may respond to toxicants or exposure to infectious agents such as viruses or bacteria either by increasing in number and size or by changing the shape of the aggregation.

Last Updated: Jul. 29, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Spottail Shiner (Notropis hudsonius), Fish, parasite communities, St. Lawrence Action Plan (SLAP), pigmented macrophages, St. Lawrence River, Parasites, Environment, Biota
Federal

Multiple metabolic, immune and reproductive effects have been reported in fish residing in effluent-impacted sites. Natural stressors such as parasites also have been shown to impact the responses of organisms to chronic exposure to municipal effluent in the St. Lawrence River (Quebec, Canada). In order to comprehensively evaluate the cumulative impacts of anthropogenic and natural stressors on the health of yellow perch, differential mRNA transcription profiles were examined in juvenile females collected from effluent-impacted and upstream sites with low or high infection levels of the larval trematode Apophallus brevis. Transcriptomics was used to identify biological pathways associated with environmental exposure.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Yellow perch (Perca flavescens), RNA-sequencing, Waste Water Treatment Plant (WWTP), wastewater effluent, parasites, Strategic Technology Applications of Genomics in the Environment (STAGE), St. Lawrence Action Plan (SLAP), Environment
Federal

The specific composition, biomass, vertical distribution and metal content of submerged and emergent aquatic plants in the St. Lawrence were evaluated. The riparian vegetation community of the St. Lawrence is characterized by the presence of extensive wetlands in the floodplain, a border of emergent plants and vast underwater meadows dominated by American wild celery (Vallisneria americana), a strong indicator species of metal concentration.

Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

For more information on SLAP, please visit https://www.canada.ca/en/environment-climate-change/services/environmental-funding/ecosystem-initiatives/st-lawrence-action-plan.html

Last Updated: Feb. 21, 2022
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  submerged aquatic vegetation, emergent aquatic vegetation, Vallisneria americana, macrophyte, metals, indicator, St. Lawrence Action Plan (SLAP), Environment
Federal

Temporal changes (1970–2016) in St. Lawrence River wetlands were assessed between Cornwall and Québec to assess wetland response to cumulative anthropogenic pressures in the watershed. Emergent wetlands area and biomass of submerged aquatic vegetation (SAV) were contrasted among five regions subjected to sharply different water level/discharge regime (stabilized, semi-natural, tidal), nutrient concentrations and shoreline use (rural to urbanized). Between 1970 and 2016, over the growing season, St. Lawrence River mean water level have dropped and mean water temperature increased. Reductions in phosphorus concentrations were observed over time both in water and in SAV tissues, in phase with improvements of urban wastewater treatment and phosphorus reduction in upstream Lake Ontario.

Last Updated: Feb. 21, 2022
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Lake Saint-Pierre, Lake Saint-Louis, submerged aquatic vegetation (SAV), macrophytes, wetlands, nitrogen depletion, phosphorus, water level
Federal

The subjects of this study – the St. Lawrence (river, estuary and gulf) and the Ottawa and Richelieu rivers – present a range of natural shoreline habitats that are conducive to the flourishing of avian, aquatic and terrestrial fauna. Avian fauna, particularly migratory birds, use wetlands as feeding and resting areas. These wetlands develop primarily in bays that are sheltered from currents and their flora varies depending on water salinity and the presence or absence of tides. In the lowlands of the St. Lawrence, which are washed by fresh and brackish waters, wetlands contain submerged and emergent aquatic plants in areas unaffected by tidal action and are dominated by the American bulrush in areas where tidal variations uncover muddy sediments.

Last Updated: Mar. 22, 2019
Date Published: Nov. 25, 2015
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  Migratory birds, Wetland, American bulrush, Spartina, Orleans, St. François, St. Louis, Gentilly, St. Pierre
Federal

The epiphytic cyanobacterium Gloeotrichia pisum forms spherical colonies embedded in a gelatinous matrix that is attached to submerged aquatic vegetation. In surveys of two fluvial lakes of the St. Lawrence River conducted in 2006–2007, growth conditions and diazotrophic ability in conjunction with the biomass and condition of its supporting macrophyte, Vallisneria americana, were examined. G. pisum integrates complex, temporally variable water-quality characteristics that are dependent upon hydrology and water residence time, thus acting as an early warning indicator of incipient habitat degradation that may lead to cyanobacterial proliferation and low biomass of vascular macrophytes. Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Lake Saint-Pierre, Lake Saint-Louis, epiphytic cyanobacteria, Gloeotichia pisum, Vallisneria americana, nitrogen depletion, indicator, St. Lawrence Action Plan (SLAP)
Federal

Aquatic systems near major urban centers are constantly contaminated with effluent from wastewater treatment plants (WWTP). Pharmaceuticals are part of the contamination and several classes of drugs have been detected in surface waters in the last decade. To better understand the impact of those pharmaceuticals in ecosystems, the exposure to aquatic species needs to be investigated. This study presents a new simple and rugged quantitative method for the determination of several classes of drugs using plasma from Northern Pike (Esox lucius) environmentally exposed to a major but highly diluted urban effluent.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Îles de Boucherville, Îlet Vert, Northern Pike (Esox lucius), Pharmaceuticals, fish, blood plasma, Wastewater Treatment Plant (WWTP), St. Lawrence Action Plan (SLAP)
Federal

This study aimed to better understand in situ cumulative effects of anthropogenic stressors on the health of St. Lawrence River (QC, Canada) yellow perch (Perca flavescens) populations using high-throughput transcriptomics and a multi-biological level approach. Fish were collected in the upstream fluvial Lake Saint-François (LSF) with low degree of environmental perturbations; Lake Saint-Louis (LSL) considered having a moderate degree of anthropogenic stressors, and Lake Saint-Pierre (LSP) a sector where the perch population has been severely declining.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Lake Saint-Pierre, Lake Saint-Louis, Lake Saint-Francois, Yellow perch (Perca flavescens), RNA-sequencing, Genomics R&D Initiative (GRDI), Strategic Technology Applications of Genomicsin the Environment (STAGE), St. Lawrence Action Plan (SLAP)
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