FT Vol.45(2)
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- ItemSeasonal Variation in Biochemical Composition of Edible Oyster (Saccostrea cucullata) from Indian Sundarbans(Society of Fisheries Technologists (India)Cochin, 2008)Protein, lipid, glycogen, moisture and ash content of the edible oyster species were analysed on monthly basis during 2004 and 2005 from the cultured site at Chotomollakhali in eastern sector of Indian Sundarbans. The culture of edible oyster was initiated in this part of the country in order to provide alternative livelihood to the poverty stricken population in the Indian Sundarbans, which may otherwise, lead to destruction of natural resources of this mangrove ecosystem. Simultaneous monitoring of hydrological parameters (surface water temperature, salinity, pH, nitrate, phosphate and silicate) and phytopigment level of the ambient water was also carried out in this cultured site to investigate the interrelationship between the hydrological parameters and biochemical composition of the oyster tissue. The two year study indicates significant seasonal oscillation of the major biochemical constituents of the oyster
- ItemQuality Changes during Storage of Smoked 'Cubes' and 'Fillet Steaks' Prepared from Marine Perch Lethrinus lentjan (Lacepede)(Society of Fisheries Technologists (India)Cochin, 2008)The study evaluated keeping quality and storage life of cubes and fillet steaks from a marine perch King Emperor (Lethrintts lentjan, (Lacepede). Smoked cubes and fillet steaks were prepared using a brine concentration of 10% and brining time of 15 min, draining at +100C for 30 min, pre-drying in mechanical drier for 30 min at 500C and smoking at 800C for a period of 3 h. Smoked cubes and fillet steaks prepared using a standardised procedure were subjected to storage studies for a period of four months under different packings viz., (i) packed in PE bags (C) (ii) dried at 500C for Ih and packed in PE bags (SI) and (iii) dried at 500C for 1 h and packed in paper bags (S2). Quality changes during the storage period were monitored every 15 days time intervals for parameters viz., moisture content, per cent free fatty acids, thio barbituric acid value, total plate count, total fungal count and sensory quality. Samples packed in paper bags remained acceptable only upto 60 days of storage while samples packed in PE bags were acceptable upto 90 days.
- ItemInformation Management Behaviour of Coastal Aqua Farmers(Society of Fisheries Technologists (India)Cochin, 2008)Information is the first unique input to proceed further towards an enterprise building. Aquaculture sector needs to be supported with 'full information' to help every stakeholder to help themselves. The present study undertaken with the shrimp farmers of coastal Andhra Pradesh and Tamil Nadu to understand the shrimp farmers' information seeking, processing and sharing behaviour indicated that technicians/consultants of feed inputs companies ( 76% and 84%) and peers (40% and 80%) were prominent information sources. The information provided was triangulated and shared with fellow farmers. Enforcing fishery extension service as the 'prime function' of State fisheries departments, audience segmentation and targeting of message, capacity building of fishery extension personnel on effective handling of ICT, involving farmers groups, farm opinion leaders and private extension agencies as partners of extension would give 'cumulative effect' in information diffusion and adoption of good farm management practices
- ItemHygienic Status in Domestic Fish Trade of Mumbai, India with Special Reference to Salmonella Contamination(Society of Fisheries Technologists (India)Cochin, 2008)An attempt has been made to study the prevailing hygienic status in domestic fish trade with special emphasis on pathogenic Salmonella contamination. In this study samples of fish, prawn and fish handling environments obtained from retail fish markets, fish landing centres and processing plants of Mumbai, India were analysed for total bacterial load and also for incidence of salmonella. The Total Plate Count (TPC) of different samples varied between 3.28 log cfu/g and 7.04 log cfu/ g. The TPC level in fish and prawn samples from fish landing centres and fish markets were always on higher side and varied between 5.87 and 7.04 log cfu/g. More than 18 % of the samples from the fish markets were contaminated with Salmonella, while none of the fish or shrimp samples from landing centres or the processing plants was found to be contaminated. A total of 26 Salmonella strains, belonging to 11 serovars, were isolated, of which as high as 9 serovars were isolated from different samples of fish markets. Most of the serovars isolated in this study were pathogenic in nature and reported to be responsible for food-borne gastroenteritis in human. Polymerase Chain Reaction (PCR) analysis to test the pathogenicity of the isolated strains confirmed their invasive nature. Looking at the extent of Salmonella contamination with variety of serovars and probable contamination with other pathogens in the samples of fish markets, the domestic retail outlets, a great deal of care is suggested while preparation of such contaminated fish.
- ItemAntagonistic Fish Gut Bacterium Lactobacillus sp. as Biocontrol Agent in Ornamental Fish Culture(Society of Fisheries Technologists (India)Cochin, 2008)The effect of addition of a fish gut bacterium Lactobacillus sp. P21 in to the rearing water on Pseudomonas fluorescens induced mortalities in ornamental fishes was examined. The goldfish, Carassius auratus and swordtail, Xiphophorus helleri were almost 3.7-4.7 times as likely to become infected when exposed to P. fluorescens (106 cfu/mL) compared to control. The introduction of Lactobacillus sp. into the culture system seeded with P. fluorescens reduced the relative risk by more than two folds through the production of low molecular weight bacteriocin-like-substance.