FT Vol.54(1)
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- ItemDifferential Training Needs of Fishery Demonstrators in the State of Assam, India(Society of Fisheries Technologists (India),cochin, 2017)Training has been playing a pivotal role in organizational and human resource development. Personnel in the Dept. of Fisheries should be imparted with in-service training on different technological and scientific aspects of fisheries, otherwise, they will soon be working far below to their potential capacity. Moreover, the findings in this regards will enable them for improving the organizational productivity and more efficient mode of technology transfer to the fish farmers. In-service training programmes on different aspects of inland fish farming should be conducted in a regular and phased manner so as to facilitate the continuous updating of knowledge and ultimately improve the fish production with state. Unbiased selection of trainees as per the organizational, professional requirements and socio-personal suitability should be followed for the selection of the candidates
- ItemBiochemical Changes During Salt Fermentation of Pangasius hypophthalmus (Sauvage, 1878)(Society of Fisheries Technologists (India),COCHIN, 2017)The suitability of Pangasius hypophthalmus as a raw material for salt fermentation and changes during 135 days was analysed. Pangasius steaks were fermented in food grade PVC jar and biochemical parameters such as pH, salt, thiobarbutric acid reactive substances (TBARS), free α-amino nitrogen (FAN), moisture and ash content were analysed. The moisture content of Pangasius had shown a slight increase during fermentation from 54.9% (0th day) to 56.67 (135th day). Ash content recorded an increase from 11.98% on 1st day to 18.17% (135th day). Salt content of Pangasius steaks has increased significantly (p 0.5) during fermentation. TBARS content recorded an increase till 75th day and decreased continuously till maturation. The FAN registered an increase from 44.71 mg% (0th day) to 92.86 mg% (135th day).The moisture, pH, ash, salt, TBARS, FAN in the final matured fermented product were 56.67%, 5.93%, 18.17%, 14.43% and 0.21 mg malonaldehyde kg-1 of fat and 92.86 mg% respectively. Therefore, it was concluded that Pangasius developed a firm consistency and characteristic flavour and taste over 135 days of maturation.
- ItemEffect of Different Washing Cycles on the Quality of Pangasius hypophthalmus Surimi(Society of Fisheries Technologists (India),COCHIN, 2017)Pangasius is a fish with low cost and round the year availability, which can be an alternate raw material to regular marine fish species like pink perch and croaker. Yellow discolouration of meat is the most serious problem in marketing Pangasius as fillet. There is a need to develop an alternative ways of utilizing Pangasius and making surimi is one of the alternatives. Therefore attempts have been made in the present investigation to optimize the process of surimi preparation from Pangasius hypophthalmus. Effect of different washing cycles i.e., one, two, three and four washes with 1: 3 mince to water ratio on the quality of Pangasius surimi was investigated. It was found that among the different washing cycles, third and fourth washing cycles have resulted in the highest gel strength and lowest expressible moisture of Pangasius surimi as compared with control and other treatments. The sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) study revealed disappearance of myosin heavy chain (MHC) in the surimi gel obtained with third and fourth washing cycle indicating good cross linking. With increasing washing cycle whiteness of surimi was also improved. Sensory evaluation indicated highest overall acceptability for surimi obtained with third and fourth washing. However, the quality of surimi obtained from third and fourth washing was not different. Therefore, it can be concluded that three washing cycles with 1:3 mince: water ration can be optimum for making good quality surimi from Pangasius.
- ItemCarcass Characteristics of Farmed Medium Carp Hypselobarbus pulchellus (Day, 1878)(Society of Fisheries Technologists (India), 2017)The carcass quality traits of an endemic carp, Hypselobarbus pulchellus, were assessed to determine its flesh yield and quality. Fish were stocked at 5000 no. ha-1 in 0.1 ha earthen composite aquaculture ponds with a mean temperature of 24.6°C and given supplementary feed once daily. Fish weighing between 1.8-2.5 kg were assessed for carcass and offal yields as well as carcass cutability, organoleptic evaluation and proximate composition. Dressed fish (n=10) were cut at three median places to yield head, first, second and third body sections. The fish had a length of 48.2±6.4 cm and weight of 2.1±0.71 kg with a condition factor (K) of 3.5±0.7. The second body section (BS) of the fish had the maximum girth, area and weight followed by first and third body sections. The girth, area and weight of the three BS were linearly proportional to the weight of the fish but not to its length. The variations in the characteristics were also higher in the bigger sections. The three body sections constituted 64% of the weight of fish, while the offal and head comprised 26 and 10% respectively. Mean yield on dressing of fish was 70% with a meat: bone ratio of 3.27. There were no differences between the first, second and third body sections in their proximate composition. Brine cooked sections evaluated by a panel were not significantly different in taste. The fish had a proximate composition of 73.2±0.7% moisture, 23±0.6% protein, 5.3±1.6% fat and 1.4±0.2% ash.
- ItemIdentification of Key Factors to Negotiate Spontaneous Spawning of Clarias batrachus in Confinement(Fishery Technology, 2017)Clarias batrachus do not spawn spontaneously in confined conditions even after induction using synthetic hormones. Current hatchery techniques for seed production of the species involves fertilization of stripped eggs using ground testes suspension from a sacrificed male. The study report the elicitation of spontaneous spawning in C. batrachus and the successful hatching of the eggs collected there from. The mature males and females were induced using ovatideTM and released into a gently sloping drain planted with paddy saplings. The fertilized eggs were collected 24 h post injection and transferred to a flow-through device for incubation. It is observed that bilateral injection of ovatide in combination with complete exclusion of light and total simulation of the natural breeding grounds of the species have positive influence on spontaneous spawning in confinement. With finer refinements, it would be possible to have more control and success in terms of spontaneous spawning and easy collection of the eggs, which is desirable for a commercial hatchery.