COMPARATIVE QUALITY ASSESSMENT OF WILD AND CULTURED NILE TILAPIA (TILAPIA NILOTICUS) STORED AT 4 °C | ||||
| Veterinary Medical Journal (Giza) | ||||
| Volume 56, Issue 4, October 2008, Page 387-398 PDF (2.89 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/vmjg.2008.378984 | ||||
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| Authors | ||||
| RAAFAT, A ELBASSUONY* ; JEHAN, M OUF; MANAL, M ALI | ||||
| Dept. of Food Hygiene, Animal Health Research Institute, Dokki - Giza. | ||||
| Abstract | ||||
| Sixty Nile (Tilapia nilotica) fish of about 200- 250 gm [ 30 wild and 30 aquacultured] were collected alive and transported directly to the laboratory surrounded by ice bags in an ice box. Organ- olyptic, bacteriological and chemical examination to estimate the freshness rating and the quality parametrs were carried out directly after fish arrival to the laboratory and periodically during chilling storage at 4°C The mean (± St. Error) De- merit scores of wild and aquacultured (Tilapia tuloticus) fish were 0 ±0 and 0 ± 0 at zero time and increased gradually during the storage time till it reaches 16.8 ± 1.37 and 18.2 ±1.41 respectively at the end of the storage period. The mean ( ± St. Error) Aerobic bacterial counts of wild and aquacultured (Tilapia niloticus) fish Were (<102 and 0.4 x 10 2 ±0.13 x 102 ) and (<3 and <3) respectively at zero time and increased gradually during the storage time till it reaches ( 6.8 x10 5 ±7.85 x 102 and 6.1 x 10 6 ±9.7 x 10 2 ) and (0.85 x102 ±0.12 x 10 2 and 0.94 x10 2 ±0.14 x 10 2 ) respectively at the end of the storage period and there was a significant difference (P > 0.05) between the means of both aerobic plate counts and coliforms counts of the wild and aquacultured (Tilapia niloticus) fish during all storage period. The mean values (± St. Error) of Total Volatile Bases Nitrogen (mg / 100g) and Thiobarbituric acid number ( mgMal /Kg) of the wild and aquacultured (Tilapia niloticus) fish samples were ( 3.16 ±0.05 and 3.58 ±0.07 ) and ( 0.036 ±0.003 and 0.081 ±0.009 ) respectively at zero time and increased gradually during the storage time till it reaches ( 32.83 ±1.17 and 33.72 ±1.21) and ( 2.164 ±0.168 and 2.535 ±0.195 ) respectively at the end of the storage period and there was no significant difference (P > 0.05) between the means of both TVB-N and TBA of the wild and aquacultured (Tilapia niloticus) fish. | ||||
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