Quality assessment of weathervane scallop (Patinopecten caurinus) and purple-hinge rock scallop (Crassadoma gigantea) from Alaska

• Main Author: Brenner, Kathryn A.
• Other Authors: Oliveira, Alexandra, RaLonde, Ray, Crapo, Charles, Bechtel, Peter
• Format: Thesis
• Language: English
• Published: 2011
• Subjects: weathervane scallop fisheries; Alaska; weathervane scallop; Fairbanks; Gulf of Alaska; Myers; Pacific; Kodiak; Yakutat
• Online Access: http://hdl.handle.net/11122/11330

Thesis (M.S.) University of Alaska Fairbanks, 2011 In Alaska, the Pacific weathervane scallop (Patinopecten caurinus) is the only species commercially harvested. In the Eastern Gulf of Alaska, harvesters report occurrences of poor quality and difficult to market scallops from some fishing areas, designating the product 'weak meat' scallops. The purple-hinge rock scallop (PHRS, Crassadoma gigantea), has aquaculture potential. A recent grow-out study in Alaska was promising, verifying this potential. Our goal was to assess the quality of Alaskan scallops using physical and chemical analyses to understand the perceived differences in meat quality. 'Weak meat' (WS) and standard quality (SS) whole weathervane scallops from Yakutat, two batches of scallop muscle from Kodiak (KS1, KS2) and a group of whole PHRS from Southeast Alaska were sampled. Compared to KS1, KS2 and SS, muscle condition was lower (P<0.05), moisture content was higher (P<0.05) and glycogen content was below the detection limit (<0.62%) in WS. There were no differences (P>0.05) in proximate composition between PHRS and Kodiak scallops, however, PHRS had higher (P<0.05) levels of [omega]-6 fatty acids. Results confirmed anecdotal information from harvesters that WS was inferior in quality when compared to either SS or KS. Furthermore, we concluded that PHRS meat was of high quality, similar to Kodiak scallops. Matt Myers’ Travel Award Scholarship 1. General introduction -- 2. Quality assessment of weathervane scallops (Patinopecten caurinus) from Alaska -- 3. Quality assessment of purple hinge scallops (Crassadoma gigantea) from Alaska -- 4. General conclusions -- Appendices.