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Handling of Two Tropical Australian Sharks to Improve Quality and to Identify the Cause of Tough Texture

Slattery, S. L. and Cusack, A. and Nottingham, S. and Bremner, A. and Pender, P. (2003) Handling of Two Tropical Australian Sharks to Improve Quality and to Identify the Cause of Tough Texture. Journal of Aquatic Food Product Technology, 12 (1). pp. 3-28.

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Article Link(s): http://dx.doi.org/10.1300/J030v12n01_02

Publisher URL: http://www.haworthpressinc.com/journals/default.asp

Abstract

Sharks caught in tropical Australian waters occasionally exhibit tough texture. Two species of Carcharinid shark, originally known as the sorrah shark (Carcharinus sorrah) and the black spot shark (Carcharinus tilstoni), compose the majority of the catch. Experiments were conducted to identify the cause of tough texture and to improve the overall quality of the catch. The possibility that a cold shock reaction may occur was investigated by observing the contraction of fillets under a range of temperature conditions before freezing. The effect of on-board handling practices were evaluated using frozen shark fillets, which had been stored prior to freezing in refrigerated seawater at different rigor stages, temperatures and times as trunks. Fillets were analyzed for nucleotides, lactate, thaw pH, sarcomere length and raw and cooked shear force values. The existence of thaw rigor was also investigated. There was little difference in the texture between the individual strips of a fillet exposed to different temperatures but there were significant differences between individual sharks. A cold shock reaction could not be demonstrated in these species. The main influences on texture were of biological origin. The species, sex and size were found to have significant links with texture of fillets. The quality of the fillets deteriorated quicker during the warmer season and were at their worst if the trunks were kept on deck till post-rigor or held in 15 degree C refrigerated seawater before freezing

Item Type:Article
Additional Information:© Hayworth Press Inc.
Keywords:Fishery products; texture; fish fillets; seafood; cold storage; freezing storage; fish storage; Carcharinus sorrah; Carcharinus tilstoni.
Subjects:Aquaculture and Fisheries > Fisheries > Packing, transportation and storage
Aquaculture and Fisheries > Fisheries > Fishery for individual species
Aquaculture and Fisheries > Fisheries > Fishery processing
Deposited On:11 Jun 2004
Last Modified:06 Sep 2010 06:22

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