Aquaculture Research: Integrated Multi-Trophic Aquaculture (IMTA) -- Deposit Feeders

Integrated Multitrophic Aquaculture: A Sustainable Approach

Overview of IMTA Research

• Fisheries and Oceans Canada (DFO) is exploring innovative methods to support sustainable aquaculture development, focusing on Integrated Multitrophic Aquaculture (IMTA).

• Dr. John Robinson and Dr. Chris Pierce are leading research efforts in New Brunswick and British Columbia, respectively, collaborating with various academic institutions and industry partners.

Understanding IMTA

• IMTA involves the co-cultivation of different aquatic species that have specific ecological roles; typically includes finfish like salmon, seaweeds for nutrient uptake, filter feeders like mussels, and deposit feeders such as sea cucumbers.

• The focus is shifting towards deposit feeder species due to their potential in recycling fish waste and excess feed pellets, which contribute to environmental issues like nutrient enrichment.

Research Findings on Deposit Feeders

• Master's students conducted research on deposit feeder species across Canada; promising results were found regarding Northern sea cucumbers' ability to consume agricultural waste efficiently.

• Sea cucumbers demonstrated a high absorption rate of organic material (79% - 85%), indicating their effectiveness within the IMTA system.

Economic Implications of IMTA

• The economic viability of IMTA is emphasized; it not only addresses environmental concerns but also enhances profitability by maximizing resource use from every feed input.

• Companies like C Vision Group Incorporated are already implementing commercial-scale IMTA practices, showcasing its market potential alongside ecological benefits.

Future Prospects for Aquaculture

• The future of aquaculture may increasingly lean towards IMTA models due to their dual advantages—environmental sustainability and economic gain.

• Ongoing studies by DFO aim to further explore the balance between ecosystem management and aquaculture productivity for the benefit of growers and Canadians alike.