Quality Changes in Kuruma Prawn during Frozen and Ice Storage

Omar Shaban, Yoshihiro Ochiai, Shugo Watabe, Kanehisa Hashimoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Kuruma prawn Penaeus japonicus was kept frozen at —20°, —30°, —40°, —50°, —60° and — 80°C for 9 months or stored in ice for one week. At due time intervals, the muscle was analyzed for changes in various parameters such as water holding capacity, tyrosine content, protein composition, etc. During frozen storage at —20° and — 30°C, expressible drip increased from 22% at the start to 41 % after 9 months, and tyrosine content from 5 mg/100 g at the start to 15 mg/100 g after 7 months. The pH of muscle showed a little increase. In contrast, all the parameters did not change significantly at or below — 40°C. Muscle protein composition remained roughly constant during frozen storage up to 9 months irrespective of temperatures adopted; 48-63% myofibrillar, 29-36% sarcoplasmic, and 2-12% alkali-soluble plus stroma proteins. One-week ice storage gave results similar to those obtained during frozen storage at —20° and — 30°C. The pH of muscle increased sharply from 7.0 at the start to around 7.9 after one week. From these results, it was concluded that —40°C is reasonable to keep the quality unchanged for a long-term storage, though — 20°C is low enough for a short-term storage up to a few months.

Original languageEnglish
Pages (from-to)291-296
Number of pages6
JournalNIPPON SUISAN GAKKAISHI
Volume53
Issue number2
DOIs
Publication statusPublished - 1987 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Aquatic Science

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