TUDIES ON THE QUALITY OF FRESH WATER AND MARINE FISH SOLD IN AND AROUND GREATER HYDERABAD MUNICIPAL CORPORATION.
Loading...
Date
2018-05-08
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
PVNR TVU
Abstract
A study was undertaken on the quality of selected fish varieties commonly available in GHMC, Telangana state. The freshness in murrel and tilapia fish was 100 percent (E- grade), in catla fish 83.33 percent (E-grade), 16.66 percent (A-grade) and in rohu fish 66.66 percent (E-grade), 33.33 percent (A-grade), it was 50 percent each of A and B grades in mackerel,tuna and pomfret, where as in hilsa fish 66.66 percent (A-grade), 33.33 percent (B-grade). The mean pH values of fresh water fish samples were in the range of 6.65- 6.84 and in marine water fish samples in the range of 5.84±0.04 - 6.37. Water holding capacity was 74.79 – 75.33 and 70.74 -70.82 percent in fresh and marine water fish respectively. ERV values of fresh water fish were in range of 28.90 ±0.23 ml – 29.73±0.24 ml and in marine fish samples in the range of 23.43±0.35 – 23.93±0.38 ml.
Thiobarbituric acid value of fresh water fish was in the range 0.94±0.05 – 1.01± 0.01 and 1.05± 0.01 – 1.55±0.15 mg MDA/kg in marine fish. The Peroxide Values and free fatty acids vaiues were not detected in any fish samples of fresh water
origin. The PV of marine fish samples was in the range of 1.37 ± 0.00 0 -3.58 ± 0.06 mg percent. The FFA values of marine water fish was in the range of 1.26- 3.19 percent oleic acid.
The total viable count (TVC) of freshwater fish was in the range of 6.45- 7.1 where as in case of marine water fish samples it was 5.73 -6.13 Log CFU/gm. The TCC of freshwater fish was in the range of 3.06-3.25, where as in marine water fish it was 2.82-2.95 Log CFU/gm. The FCC of fresh water fish was in the range 2.53-2.70 and in marine fish it was 2.41-2.51. The yeast and moulds count of fresh water fish was in the range of 1.91-1.96 and in marine fish it was 2.36-2.51 Log CFU/gm.
The incidence of E. coli was high in tilapia (83.33percent) and least in tuna and hilsa ( 33.33 percent). The Salmonella spp incidence (16.66) in catla, rohu, tilapia, tuna and hilsa and no incidence in murrel, mackerel and pomfret. The incidence of Clostridium was higher in rohu (50 percent) and least in mackerel (16.66 percent). The incidence of S. aureus was high in catla and rohu (50 percent) and least in mockerel (16.66 percent). The incidence of Vibrio spp was 50 percent in catla, tilapia, murrel and rohu, whereas in all marine fish ( mockrel, tuna, pomfret and hilsa) it was 83.33 percent. The incidence of Aeromonas spp higher (66.66 perecent) in tuna and pomfret and lower (16.66 percent) in rohu and tilapia. The incidence was high (66.66) in hilsa and low (16.66) catla, rohu and tilapia. Shigella spp incidence in catla, tilapia, mockrel and pomfret was 16.66 percent, where as no incidence found in rohu, murrel and Hilsa fish samples.
The E. coli, Salmonella spp, Clostridium spp, Staphylococcus aureus, Vibrio spp, Aeromonas spp, Pseudomonas spp and Shigella spp were in the range of 3.69- 5.84, 0-2.47, 1-2.32, 4.69-5.90, 2- 3.30, 2.47- 5.84, 2.47-5.84 and 0-2.47 Log CFU/gm respectively.
Description
D-580
Keywords
null