FT Vol.54(4)
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- ItemAssessment of Socio-economic status of Fishers across Different Sectors in Tamil Nadu(2017)The study found that the measures for improving literacy and health facilities created a positiveimpact on the livelihoods of the fisher community. The education and health standards are comparable with any other sector in the state providing ample opportunities for the upliftment of the fishers in the future. Over the years, due to the seasonality of the fishing operations and higher gestation period in culture sector, the fishers often diversified their income sources which include business, agriculture, labour, services and others. However due to increasing expenditure on account of maintaining the living standard, they are still engulfed in the vicious circle of poverty due to increased debt and lack of savings. Hence, appropriate measures need to be initiated to develop alternative avocations to improve income and standard of living.
- ItemEfficacy of Sodium Tripolyphosphate and Non-Phosphate Additives on the survival of Vibrio parahaemolyticus on Prawns (Fenneropenaeus indicus) (H. Milne-Edwards, 1837) during Frozen Storage(Society of Fisheries Technologists (India),COCHIN, 2017)Use of sodium tripolyphosphate (STPP) and nonphosphate additives (NP1) in combination with sodium chloride is practised in soaking to prevent drip loss while thawing the frozen shrimp. In the present study, we have determined the efficacy of these additives on the survival of Vibrio parahaemolyticus on prawns (Fenneropenaeus indicus), during block freezing and individual quick freezing conditions. Freshly harvested prawns were beheaded and treated with a blend solution containing STPP/NP1 at 3 g 100 ml-1 in combination with sodium chloride at 2g 100 ml-1, in two separate experiments. At appropriate time intervals, whole prawns were sampled and dilutions plated onto TCBS agar medium to determine the number of V. parahaemolyticus. Experiments were performed in triplicate. Results indicated that STPP treated samples exhibited significant (p<0.05) reduction in the number of V. parahaemolyticus at any given time in both frozen conditions over the course of storage period as compared with non- phosphate treated samples. On the other hand, control samples (water dip) showed a gradual reduction in the number of organism, which is attributed to freezing. Therefore, sodium tripolyphosphate can be used as a promising drip loss preventer as well as an antimicrobial, to enhance the safety of frozen seafood.
- ItemOccurrence of Low Value Bycatch in Trawl Fisheries off Karnataka, India(Society of Fisheries Technologists (India),COCHIN, 2017)Bottom trawling in the most effective method of shrimp capture but highly intensive trawling adversely affects benthic ecology and biodiversity. The present study is aimed to throw light on low value bycatch (LVB) landings and catch composition of trawl boats, at Mangaluru fisheries harbour. The quantity of fish landings by single day trawlers (SDT) during 2012-14 was 2 151.3 t y-1, of which 61.8% was considered as edible grade and 38.2% was LVB. Multiday trawlers (MDT) landed an estimated 165917.2 t of fishes/yr, out of which 79.6% were marked for edible use and remaining 20.4% was landed as LVB. LVB to target group ratio for SDT and MDT landings was 1:1.66 and 1:3.93, respectively. The LVB of MDT consisted of 121 finfishes belonging to 82 genera, 55 families and 13 orders. An estimated 47.53% of the finfish LVB landing by weight (56.1% by number) was contributed by juveniles of commercially important species and the estimated resource loss was 14044 t by weight and 11000 million in number. From the fishery resource conservation and sustainability point of view, the magnitude of resource damage due to trawl bycatch is alarmingly increasing. The study recommends using trawl nets with 35 mm square mesh codend, effort reduction in critical fishing grounds and adoption of Juvenile Fish Excluder cum Shrimp Sorting Device (JFE-SSD) which minimizes juvenile fish catch.
- ItemDoes Rohu (Labeo rohita) (F. Hamilton, 1822) have different forms of Immunoglobulins?(Society of Fisheries Technologists (India),COCHIN, 2017)Characterisation of immunoglobulin (Ig) is an essential prerequisite for development of anti- fish Ig antibody. There are number of reports describing the characteristics of rohu Ig which state the existence of different forms of antibodies in rohu. The present review is an attempt to compile these reports for analyzing the probable reason for the existence of such forms and the possible future research requirements for confirming the same.
- ItemConfirmation of ciguatoxin fish poisoning in red snapper, Lutjanus bohar (Forsskål, 1775) by mouse bioassay(Society of Fishery Technologists (India), 2017)