Freshwater Fish

 The challenge

The far north in Ontario contains thousands of lakes, five of the last undammed and intact large rivers left in the world, and the largest wetlands in North America. This vast landscape is more water than land, and all of this water is home to more than 50 species of fish – the highest fish biodiversity in a largely still natural state left in Canada. 

Healthy populations of fish are integral for First Nations people who live in the far north in Ontario. Fish is an important subsistence food source in an area where grocery stores are filled with highly processed and expensive food that is flown in from the south, and fishing is a culturally and spiritually important connection to a traditional way of life. Fish also support economically important recreational fisheries, especially fly-in fishing tourism. And they are a key component of the boreal ecosystem, providing a food source for animals ranging from birds to bears.  

However, these fish are under threat from climate change and from industrial activities like hydropower dams, mines, and forestry, as well as from the roads and transmissions lines that industrial activities bring with them. There is also a lack of scientific data on fish in the vast far north in Ontario, and so we often don’t have a complete understanding of how fish are being impacted by these forces. 

In order to safeguard healthy fish populations for future generations, we need better information and monitoring for fish in the far north of Ontario, and this information needs to be integrated into planning and management.  

 

   

 

What we are doing and why

WCS Canada is working to fill critical knowledge gaps and identify the main threats for freshwater fish in the far north in Ontario, and then acting to address these threats with evidence-based solutions. 

We are working to fill knowledge gaps and identify the main threats for freshwater fish by supporting the development of community-based monitoring programs; using computer-based modelling; and through targeted on-the-ground data collection.

We are acting to address threats by working to improve planning processes in order to limit the impacts of development on fish, and by working directly with decision-makers to improve management of existing dams and other developments. 

Our strategies

We seek to improve planning in order to limit the impacts of development on fish. Fish are particularly sensitive to cumulative impacts because watersheds are connected, and impacts from a localized development can spread downstream. We are calling for big-picture regional planning for the far north of Ontario, so that the cumulative impacts of development at the watershed level are considered and accounted for in planning processes. 

We strive to improve protection for fish using advanced computer modelling to identify the watersheds in the far north of Ontario that currently have the highest freshwater fish biodiversity, and to predict which watersheds will have the highest freshwater fish biodiversity under future climate change scenarios, in order to prioritize areas for protection. For existing developments, we work to improve management. For example, we have been working with Moose Cree First Nation Resource Protection on an ecological study of lake sturgeon at one of the largest hydropower facilities in Ontario, in order to identify whether management practices can be improved to reduce the impact of the dams (which are partially owned by Moose Cree First Nation) on this important fish species. We need data in order to make evidence-based decisions, and so we work to improve monitoring by supporting community-based monitoring; compiling and adding to existing scientific data; and using computer modelling to fill gaps

 

Latest news

  • The Water We Share is an easy-to-understand story map that uses maps, photos, and infographics to explain how WCS Canada is working to understand how climate change and development are impacting freshwater ecosystems. 
  • In a Muddy Boots blog, WCS Canada scientist Dr. Connie O’Connor talks about how we are using different methods – including on-the-ground research, computer modelling, and supporting community-based monitoring – to get better information about freshwater fish in the far north in Ontario. 
  • WCS Canada scientist Dr. Cheryl Chetkiewicz discusses how WCS Canada is identifying and addressing the threat to freshwater fish from climate change and the cumulative impacts of development in a National Geographic blog.

 

Program Staff

Constance O'Connor
Associate Conservation Scientist
Meg Southee
GIS Analyst and Spatial Data Manager
Gretchen Lescord
Postdoctoral Fellow
Liset Cruz Font
Postdoctoral Fellow
All Freshwater Fish Staff >>

Latest Publications

All Freshwater Fish Publications >>

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Photo credits: Banner | Fisheries and Oceans Canada ©, Thumbnails | 1,2. Engbretson Underwater Photography ©, 2, WCS Canada ©, 4. Meg Southee © WCS Canada

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