M. Kjerstad, I. Fossen, H. M. Willemsen
More Research, Section of Fisheries, P.O. Box. 5075, N-6021 Ålesund, Norway
Source - Journal of Northwest Atlantic Fishery Science, Volume 31: 333-338
ISSN-0250-6408
M. Kjerstad, I. Fossen, and H. M. Willemsen. 2003. Utilization of Deep-sea Sharks at Hatton Bank in the North Atlantic. J. Northw. Atl. Fish. Sci., 31: 333-338. https://doi.org/10.2960/J.v31.a25
Abstract
The study describes the relative yield of consumption- and by-products from five deep-water sharks frequently caught in the fishery along the continental slopes of the north-eastern Atlantic Ocean. The species described are: leafscale gulper shark (Centrophorus squamosus), Portuguese dogfish (Centroscymnus coelolepis), black dogfish (Centroscyllium fabricii), longnose velvet dogfish (Centroscymnus crepidater) and birdbeak dogfish (Deania calcea). It is possible to utilize backs, fillets, belly flaps and tails as consumption products. Due to differences in the size of the species, it is most convenient to produce consumption products of the largest species, such as leafscale gulper shark and Portuguese dogfish. Backs and fillets from leafscale gulper shark gave the highest relative yield, 26.1% and 20.6% of round weight, respectively. The belly flaps of the five species constitute 10% to 15.8% of the body weight. Liver is the most demanded by-product due to high oil, particularly squalene, content. The yield of liver varied from 18.3% to 26.2% of round weight. Leafscale gulper shark had the highest average squalene content in liver oil of 65.5%. The findings indicate a potential for increased utilization for both consumption and by-products from deep-sea sharks.
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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - 2003
Publication Type - Journal Article
Descriptors - by-products, consumption product, deep-sea sharks, Hatton Bank, North Atlantic dogfish, shark liver oil, squalene, utilization
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