New Modified Dipping Method Using 4-hexylresorcinol for Preventing Blackspot Formation in Prawns

Industry acceptance of alternative sulphite treatments for preventing blackspot in prawns is limited. This study demonstrated that dipping prawns (Penaeus monodon and Fenneropenaeus merguiensis) in a less concentrated solution for longer times provides better control of blackspot formation than the...

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Bibliographic Details
Published inJournal of aquatic food product technology Vol. 18; no. 3; pp. 284 - 293
Main Authors Slattery, Steven L., Williams, David J., Torrisi, Caterina
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 26.06.2009
Subjects
4-hexylresorcinol
blackspot
dip
melanosis
prawns
residues
yield
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Summary:Industry acceptance of alternative sulphite treatments for preventing blackspot in prawns is limited. This study demonstrated that dipping prawns (Penaeus monodon and Fenneropenaeus merguiensis) in a less concentrated solution for longer times provides better control of blackspot formation than the recommended 2 minute dip in 50 mg/L 4-hexylresorcinol. Protection improved as modified dipping times and solution concentrations increased. Blackspot protection provided by most of the modified dip methods was more effective than a 1 minute dip in 1% sodium metabisulphite. The recommended 2 minute dip method should be limited to 125 kg when used on consecutive 25-kg batches of prawns. Yields increased by less than 10% even after 72-hour exposure in the modified dip. The new dipping method meets most international residue standards when applying the modified treatments evaluated.
ISSN:1049-8850
1547-0636
DOI:10.1080/10498850902762299