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Chemical Monitoring in Local Foods: Mercury in Fish

Description

Mercury (Hg) enters the environment through natural processes and human activities. There are three forms of Hg: elemental (metallic) mercury, inorganic mercury salts and organic mercury... More ≫

Description

Mercury (Hg) enters the environment through natural processes and human activities. There are three forms of Hg: elemental (metallic) mercury, inorganic mercury salts and organic mercury compounds. Methylmercury (MeHg) is often formed from inorganic mercury during biological processes such as methylation by microorganisms in water and sediment. MeHg can accumulate in aquatic organisms including fish. People are exposed to very low levels of mercury in the air, water and food. Some people may be exposed to relatively higher levels of mercury by eating MeHg-containing fish. MeHg accumulates in the human body over time and because it is a known neurotoxin, it is necessary to limit human exposure to MeHg. To protect public health, Health Canada has proposed mercury guidelines and advisories for fish consumption based on total mercury (THg; all forms of Hg in a sample). This dataset was collected as part of long-term monitoring of mercury levels in various species of fish in Albertan...

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Alberta Native Trout Science Workshop and Gathering II proceedings

Description

This report provides a summary of the proceedings of the Alberta Native Trout Science Workshop and Gathering II.

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List of Elements in Alberta - vertebrates

Description

List of vertebrates documented for the province of Alberta including native as well as exotic (introduced) species.

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2019 fish consumption guidance : mercury in fish

Description

This technical report was prepared to provide summary information about the fish consumption advice available for Alberta water bodies and to present new data collected from 2013 to 2016... More ≫

Description

This technical report was prepared to provide summary information about the fish consumption advice available for Alberta water bodies and to present new data collected from 2013 to 2016 (inclusive) along with attendant advice. The information in this report may be of interest to researchers, public health professionals, or members of the public who are interested in fish consumption advice in Alberta and want additional information. This document has been produced using methods described in past reports – as such, the information contained herein is a summary of available data related to mercury in fish and human health advice.

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Fall walleye index netting at Lac La Biche, Alberta, 2014

Description

The Fall Walleye Index Netting survey was conducted from September 15 to 19, 2014. A total of 1,166 fish were caught in this survey representing 8 species. a total of 390 walleye were caught in... More ≫

Description

The Fall Walleye Index Netting survey was conducted from September 15 to 19, 2014. A total of 1,166 fish were caught in this survey representing 8 species. a total of 390 walleye were caught in the 32 nets. The report summarizes the statistics of all the fish caught.

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Species at risk 2014-15 recovery action summary : westslope cutthroat trout

Description

Presents background information on the westslope cutthroat trout, including its risk category and where it can be found in Alberta. Lists the recovery plan in effect and the recovery goal for the... More ≫

Description

Presents background information on the westslope cutthroat trout, including its risk category and where it can be found in Alberta. Lists the recovery plan in effect and the recovery goal for the westslope cutthroat trout, strategies being used to reach the recovery goal, a short summary of progress on recent and ongoing recovery actions, and any upcoming actions being considered to aid recovery of the species.

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Lac La Biche fisheries restoration program : fall walleye index netting (FWIN) results, 2005 to 2013

Description

This report contains preliminary information and interpretations that might be subject to future revisions. Persons who wish to quote from this report, cite it in a bibliography, or use it in any... More ≫

Description

This report contains preliminary information and interpretations that might be subject to future revisions. Persons who wish to quote from this report, cite it in a bibliography, or use it in any other form must first obtain permission from Executive Director, LAR Operations Division, or the author. The Lac La Biche Fisheries Restoration Program was initiated in 2005 as a six-part program with management actions targeting commercial and recreational fishery reductions, walleye stocking, double-crested cormorant control, protection of critical fish areas and monitoring. The social objective of the program was to improve fishing opportunities for future generations by resotring the lake to historical conditions. The ecological objectives were to recover the walleye population and improve the overall size structure of the fish community.

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Buck Lake walleye management : fisheries management update - prairies area

Description

Buck Lake has native fish populations of Walleye, Lake Whitefish, Northern Pike, Yellow Perch, Burbot, White Sucker, Trout-perch, Brook Stickleback, Iowa Darter and Spottail Shiner. The lake has a... More ≫

Description

Buck Lake has native fish populations of Walleye, Lake Whitefish, Northern Pike, Yellow Perch, Burbot, White Sucker, Trout-perch, Brook Stickleback, Iowa Darter and Spottail Shiner. The lake has a long history of providing an excellent summer Walleye sport fishery and a winter Lake Whitefish commercial fishery. It also supports a First Nations fishery. Over the past decade, fisheries biologists have noted a decline in the populations of both Walleye and Lake Whitefish. Furthermore, the size of Walleye being caught has decreased. These trends are a concern to the resource users who fish Buck Lake, as well as the fisheries biologists who manage it. Background Recreational fishing, ongoing summer kills and cumulative habitat loss are currently the main factors affecting fish populations in Buck Lake. Other factors, such as the harvest of Lake Whitefish through the commercial and First Nations fisheries are relatively minor. Recent surveys of recreational fisheries indicate that the...

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Buck Lake fall walleye (Sander vitreus) index netting survey

Description

Survey objectives included estimating catch per unit effort, as well as various population demographics (age, growth rate, reproductive status) in order to monitor the effectiveness of Walleye... More ≫

Description

Survey objectives included estimating catch per unit effort, as well as various population demographics (age, growth rate, reproductive status) in order to monitor the effectiveness of Walleye management and to ensure the stability and sustainability of Walleye populations at this location.

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Overview of fish contaminant monitoring programs in jurisdictions and summary of Alberta studies : final report

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This report includes an overview of major fish contaminant monitoring programs in Canada and U.S.A., and a summary of available fish contaminant surveys or monitoring studies from Alberta.

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