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Article originally posted at Oceana.org.


The Campaign

The Transparent Oceans Initiative (TOI) produces and disseminates evidence-based research that documents the activities—and the consequences—of the nations engaged in fishing on the high seas and the distant waters of other countries, so called distant-water fishing (DWF).

Interactions between finfish aquaculture and American lobster in Atlantic Canada

Globally, lobsters are one of the most economically valuable wild species caught in capture fisheries. Catches are dominated by American lobster (Homarus americanus) landed entirely in Atlantic Canada and northeastern United States. In Atlantic Canada, lobster fishing and marine finfish aquaculture take place in the same coastal waters creating the potential for negative environmental, as well as social, interactions. We review the state of knowledge of environmental interactions between American lobster, their habitat and fishery, and marine finfish aquaculture. We first provide a brief overview of key biological, behavioural, and ecological processes and environmental stressors of American lobster at different life-history stages followed by an overview of the pathways of effects of marine finfish aquaculture on coastal ecosystems in general and on American lobster. Our review found that certain finfish aquaculture-lobster interactions have received considerable study (e.g., chemical use), whereas knowledge of other interactions are either limited (e.g., net pens, waste discharges) or lacking (e.g., disease, noise, lights, and odours). An ecosystem-based approach to aquaculture has been proposed for managing these interactions but implementing this approach has proven to be a challenge in part because of complex multi-sector, multi-stakeholder and multi-agency governance issues. While governance solutions await development, practical measures based on the results of scientific research identified in this review, such as better use of existing oceanographic and bathymetric data, habitat and human impact assessment tools, and toxicity information offer regulators ample information and management tools, at least at the farm- and bay-scale, to avoid negative finfish aquaculture-lobster interactions in Atlantic Canada. Bridging the governance gap will likely require new community-based management models that more effectively identify, generate, and integrate local community and fisher knowledge and concerns.

Find the report here.


Executive Summary

The foundation of Canada’s blue economy is our wild fish populations. Forage fish – the small, schooling fish like herring, capelin and shrimp that feed larger predators – are vital contributors to wild fisheries in Canada. They are targeted directly in fisheries and contribute indirectly as prey to other commercially important fish, like cod, halibut and tuna. While forage fish have large population booms and busts in response to changing environmental conditions, their population dynamics are also influenced by fishing pressure. The most important principle in managing forage fish is that enough must be left in the water to ensure overfishing does not put their populations and their predators at risk.

The implementation gap in Canadian fishery policy: Fisheries rebuilding and sustainability at risk

Highlights

  • Canada has policies to include the Precautionary Approach in fisheries management.
  • Seven years later a federal audit found policy implementation was incomplete.
  • Work plans were developed to fully implement the Sustainable Fisheries Framework.
  • This study found most components outlined in the work plans remain delayed.
  • This policy implementation gap puts fisheries rebuilding and sustainability at risk.