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Found 10 records similar to Parasite community in Athabasca River trout-perch (Percopsis omiscomaycus)

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

A targeted survey analysed 483 samples of fresh mushrooms for the presence of deoxyribonucleic acid (DNA) from the following enteric parasites of concern: Cyclospora cayetanensis, Cryptosporidium species, Toxoplasma gondii, and Giardia species. All 483 samples were found to be free of parasite DNA.

Last Updated: Apr. 13, 2022
Date Published: Nov. 28, 2019
Organization: Canadian Food Inspection Agency
Formats: CSV
Keywords:  Microbiology, Targeted Surveys, Cyclospora cayetanensis, Cryptosporidium, Toxoplasma, Giardia, Fresh Whole Mushrooms, Pathogen, Parasites
Federal

A targeted survey of 2,233 samples of leafy vegetables for parasites found 98.8% to be satisfactory. Samples were analyzed for Cyclospora cayetanensis, Cryptosporidium spp., Toxoplasma gondii, and Giardia spp. Two samples contained parasite DNA of Cryptosporidium spp. and three samples contained Toxoplasma gondii DNA.

Last Updated: Feb. 21, 2022
Date Published: Aug. 15, 2018
Organization: Canadian Food Inspection Agency
Formats: CSV
Keywords:  Microbiology, Targeted Surveys, Cyclospora cayetanensis, Cryptosporidium, Toxoplasma, Giardia, Fresh Leafy Vegetables, Pathogen, Parasites
Federal

​​A targeted survey on parasites in imported whole fresh sugar snap and snow peas analyzed 932 samples for Cyclospora cayetanensis (C. cayentanensis), Cryptosporidium species (spp.) and Toxoplasma gondii (T. gondii). Of the 932 samples, 489 were also tested for Giardia spp. All samples were found to be free of parasites.

Last Updated: Apr. 15, 2022
Date Published: Jun. 16, 2020
Organization: Canadian Food Inspection Agency
Formats: CSV
Keywords:  Microbiology, Targeted Surveys, Cyclospora cayetanensis, Cryptosporidium, Toxoplasma gondii, Giardia, Sugar Snap Peas, Snow Peas, Pathogen
Federal

The Richelieu River, Quebec, is a highly-regulated waterway subject to numerous anthropogenic influences from municipal effluents and agricultural activities. Parasite communities in 234 spottail shiners (Notropis hudsonius) were examined from 4 localities in late spring 2003 and 2004. Parasite component community similarity among localities could not be directly linked to available upstream water quality measurements or anthropogenic activity and was best explained by precipitation. This study suggests that fish parasite species composition and richness in the Richelieu River are influenced by environmental parameters which in turn ultimately are driven by a combination of climatic conditions and anthropogenic activities in the watershed.

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, precipitation, St. Lawrence Action Plan (SLAP), Richelieu River, Parasites, Environment, Biota
Federal

A targeted survey analyzed 1,828 samples of unpasteurized juices and high pressure processed juices for bacterial pathogens and indicators, viruses and parasites. An elevated level of generic Escherichia coli was found in one sample. All other samples were found to be free of bacterial pathogens, viruses, and parasites. The CFIA conducted appropriate follow-up activities.

Last Updated: Apr. 15, 2022
Date Published: Nov. 28, 2019
Organization: Canadian Food Inspection Agency
Formats: CSV
Keywords:  Microbiology, Targeted Surveys, Salmonella, Escherichia coli O157, Shigella, Escherichia coli, Cyclospora cayetanensis, Cryptosporidium, Toxoplasma
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

Monitoring activities have collected bulk suspended sediment samples using continuous flow centrifuges and Phillips Tube samplers in the Lower Athabasca River and tributaries respectively. Further, in the absence of pre-development monitoring for this region, high fidelity dated lake sediment cores were used to assess the natural range in contaminant deposition to this region and to obtain a historical perspective of contaminant loadings. All sediments (suspended river and lake cores) have been analyzed in the laboratory for sediment quality variables as per Appendix B in the Integrated Monitoring Plan (cores were also analyzed for paleo indicators of ecosystem health such as diatoms). In addition, as the Lower Athabasca river bed sediments are known to shift and migrate downstream, bathymetric maps of the bed-channel morphology over time was also completed.

Last Updated: May 20, 2022
Date Published: Dec. 30, 2014
Organization: Environment and Climate Change Canada
Formats: WMS CSV HTML ESRI REST
Keywords:  Water, Assess Toxicity; Manage and Monitor for Environmental Presence of Hazardous Substances and Waste, Monitor / Assess Substance and Waste Levels in Air; Water; Soil; Biota, Water - Drainage regions - Peace–Athabasca, Sediments, Oil sands
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

The river bed sediments in the Lower Athabasca are known to shift and migrate downstream. Numerical modelling of water quantity and quality (including sediments) requires accurate river channel cross-sectional geometry within the area of study. Such cross-sectional geometry prior to 2012 was limited for the Lower Athabasca River restricting modelling accuracy and efficiency. As such, in order to better understand the bed sediment dynamics of the lower Athabasca River and to support model development (e.g., calibration/validation of sediment/bitumen erosion/transport/deposition), high resolution swath bathymetry data were collected form bank to bank during open water seasons (2012-2014) covering approximately 115 km from Fort McMurray to the mouth of the Firebag River.

Last Updated: Jul. 22, 2021
Date Published: Dec. 22, 2016
Organization: Environment and Climate Change Canada
Formats: PDF KMZ
Keywords:  sediment, sediment quality, suspended sediment, sediment cores, bathymetry, mainstem, tributaries, lake, oil sands
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