Utilization of Wastes from Lumpfish, Cyclopterus lumpus, Roe Harvesting Operations: An Examination of the Lipid and Glue Potential, and Comparison of Meal with that from Nova Scotia-Caught Menhaden

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Abstract
The problem of utilization of lumpfish, Cyclopterus lumpus, wastes, generated by roe harvesting operations, was investigated. The lipid content (~2%) of female lumpfish after removal of roe is too low to result in useful commercial recovery of oil. Male lumpfish have higher lipid levels (~7.6%), but both sexes contain large amounts of water and thick collagenous skin on the head which is an unusual raw fisheries material. In a small-scale reduction process an experimental lot offish meal was produced from lumpfish with a lower yield than that obtained from other fish, but from WARF analyses appeared to be nutritionally adequate and comparable with menhaden meal produced from fish taken in Nova Scotian waters. The use of the fish skin for glue was investigated but appears uneconomic if hand skinning is required.

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