Assessment of Quality of Fish landed at the Cochin Fisheries Harbour

Abstract

Assessment of quality of fish and shnmps landed at the Fish Harbour, Cochin was made over the period January, 1980 to December, 1982. A total of 201 samples were analysed. Nearly 75% of the samples scored between 6-10 in a 10 point hedonic scale and the percentage unacceptability based on sensory assessment was 5. 5%. In 10.1% of the samples, total volatile nitrogen was >30 mg% and in 8.3% of the samples trimethylamine- nitrogen was > 10 mg%. Both, the gr Torrymeter and Intellectron Fish Tester VI readings marked significant correlation with sensory scores and chemical indices; but failed to bear any significant correlation with bacterial counts. Of the
5-1 total samples 66.7% had total plate count (TPC) 210 g and 8. 5% were considered unacceptable based on TPC >5 x 105g-1; 63.2~~ of the samples were free from Escherichia coli; 26.4 % had > 20 E. coli 1 and 20.4% of the samples contained faecal streptococci > 10 s g-I. Seven percent of the samples showed coagulase positive staphylococci > 100 g- I . Salmonella could not be detected in any of the samples · examined. Crushed ice samples and the platform of the harbour had high bacterial
loads.