Post harvest quality changes in threadfin (Galeoides decadactylus) obtained from Liverpool fish market, Lagos, Nigeria

Abstract

Fish is exceedingly perishable due to their biological composition and its shelf life. The post harvest quality changes in threadfin (Galeoides decadactylus) stored in ice was carried out. Trimethylamine (TMA) and Total Volatile Bases (TVB) of fish flesh were monitored alongside with microbial assessment. TMA and TVN of the fish increased on ice storage from 4.23 and 8.53 mg /100 g on day 0 to 15.1 and 34.3 mg/100g, respectively on day 18. The microbial assessment showed total viable count (TVC) of 3.43 x 10⁴ at harvest and 5.21 x 10⁷ Cfu/g on day 18 on ice with range of 0 - 4.0 x 10⁵ Cfu/g of hydrogen sulphide (H₂S) producers. TMA and TVN results showed maximum acceptability of samples for 18 days on ice. The microbial and sensory assessment was in support of the chemical assessment. The study revealed shelf life
of 18 days for Galeoides decadactylus in ice.