FT Vol.35(2)
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- ItemTime Study for the Commercial Production of Block Frozen Whole Squid/Cuttlefish in 2 kg Pack(Society of Fisheries Technologists (India)Cochin, 1998)A time study to work out the normal time and standard time required for each element or activity in the commercial production of block frozen whole squid/ cuttlefish was undertaken. A standard flow chart was developed to minimize the handling and processing time and to minimize exposure of the raw material to higher temperatures. The important allowances to be considered in calculating the standard time were identified as personal, standing and fatigue and process allowances. Filling, setting in trays, glazing and loading in trolleys were considered as an integrated and inseparable activity and was found to consume 112.20 min as normal time and 128.47 min as standard time for producing one batch of 220 slabs of 2 kg each. The process cycle time was estimated to be 305 min for the production and storage of 220 frozen blocks of whole squid/cuttlefish. Process cycle time could be further reduced by introducing modern freezers with shorter freezing time and by introducing automation at the post freezing stations.
- ItemStorage Characteristics of Cultured Penaeus indicus in Ice and at Ambient Temperature(Society of Fisheries Technologists (India)Cochin, 1998)live P. indicus collected from a prawn farm was used for storage studies at ambient temperature and in ice. The changes in sensory, chemical and bacteriological characteristics were followed during storage. Shelf life of P. indicus at 30"C was only 12 h. When stored in ice it remained in organoleptically acceptable condition for 15 days. Balck discolouration was noticed in 6 h at ambient temperature and by the 4th day in ice. The TVBN values were 40 mg/100 g initially, which decreased during early stages of storage and then increased. Changes in quality of farm-produced prawn during ice storage were similar to the quality changes in wild prawns
- ItemPopulation Dynamics of an Indigenous Carp (Labeo dussutnieri) of the River Pampa, Kerala (India)(Society of Fisheries Technologists (India)Cochin, 1998)Based on length composition of commercial landings of Labeo dussumieri of the river Pampa, growth parameters, La and K were estimated using ELEFAN I programme as 464.7 mm and 0.64/anmm\ respectively in male and 502 mm and 0.81/ annum in female. Average instantaneous rates of mortality Z, M and F in male were respectively 1.4305, 0.8595 and 0.5710 while in females the above values were 2.3348, 1.0863 and 1.2485. From the length converted cohort analysis, F was estimated to be 0.5709 in male against 1.2484 in female. The results of the present study showed that males of L dussumieri of the river Pampa are harvested below the optimum level while the females are exploited at optimum level and therefore, it is concluded that the stock of this species can be maintained at a sustainable level at the present level of exploitation.
- ItemFrozen Storage Characteristics of Oratosquilla nepa(Society of Fisheries Technologists (India)Cochin, 1998)The stomatopod, Oratosquilla nepa was quick frozen as whole and as meat at -40"C and stored at -l 'C. The shelf life was evaluated by following biochemical, physical and organoleptic changes that occurred during storage. Total bacterial count was found to show a progressive fall for 3 months. Trimethyl amine values were found to decrease after 6 months of storage. Highest values for total volatile nitrogen were observed after 6 months of storage. Organoleptic quality was acceptable up to 5 months. Frozen squilla stored for 5 months can be used for further processing into value added products.
- ItemChanges in Rohu (Labeo rohita) Actomyosin During Frozen Storage: Protein Denaturation or Coagulation?(Society of Fisheries Technologists (India)Cochin, 1998)Changes taking place in actomyosin extracted from Labeo rohita (Rohu) during storage at -20<'C were studied with a view to find out whether these changes were denaturation or coagulation of proteins. Changes in solubility, Ca2* ATPase activity and Mg2* ATPase activity were monitored for a period of 10 weeks. The irreversible loss of solubility and Caz* and Mg2* ATPase activities indicate that an irreversible aggregation of proteins, probably through covalent disulphide bonds is taking place during frozen storage of rohu actomyosin and this is suggestive of protein coagulation, as distinct from protein denaturation.