100% fish in the Great Lakes region. Cisco (Coregonus Artedi) full utilization.

This report presents a comprehensive biotechnical analysis of fillets and byproducts (heads, bones/frames, and skin) from Cisco (Coregonus Artedi) harvested in the Great Lakes region of the United States. Conducted by Matís for the Conference of Great Lakes St. Lawrence Governors & Premiers (GSGP), the study aims to identify higher-value alternative uses for Cisco byproducts.

Key findings include:

• Whole Body Mass Balance and Proximate Composition: Detailed analysis of fillets, heads, bones, and skin.
• Amino Acid and Hydroxyproline Content: Evaluation of amino acid content in heads and hydroxyproline content in skins and scales, with scales showing notably high hydroxyproline at 2.45 g/100g protein.

Utilization Alternatives

1. Protein Isolate and Fish Oil from Heads: The heads showed significant amino acid content, making them suitable for protein isolate production and fish oil extraction.
2. Gelatine Production from Skins and Scales: High hydroxyproline levels indicate potential for high-quality gelatine production.
3. Protein Hydrolysates from Viscera and Roes: Though promising, these transformations require substantial investment and adequate raw material supply.

Conclusion and Recommendations

This initial identification of utilization alternatives highlights the potential for value-added products from Cisco byproducts. Further analysis and feasibility studies are recommended to optimize and implement these alternatives.