Loading...
Theses (PG)
Browse
35 results
Search Results
ThesisItem Open Access HEAT PENETRATION CHARACTERISTICS AND THE QUALITY OF READY TO EAT PANGASIUS FISH FILLETS CHUNKS (PANGASIUS HYPOPTHALMUS) IN MASALA USING FLEXIBLE RETORT POUCHES(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) TEKADE VYANKATESH DEVENDRAKUMAR; B.MANJANAIKPangasius fish fillet chunks in masala is a famous south Indian dish prepared using Pangasius fish (Pangasius hypopthalmus) in the culinary style. The present investigation was aimed to optimize different Fo values of the Pangasius fillet chunks in masala packed in flexible retortable pouches. The product was thermally processed at different lethality and heat penetration characteristics indicating similar heating and cooling lag factor. Fh value was 13 and 16.5 min for the product processed at Fo values of 7.37 and 8.12 min, respectively. Total processing time was 26.94 and 31.37 min, respectively, for Fo 7.37 and 8.12 min. Cook value of the processed product was 64.70 min for Fo 7.37 min and 65.87 min for Fo 8.12 min. All instrumental texture parameters showed decreasing trend upto storage period of 90 days. Based on the organoleptic evaluation, product processed at Fo 7.37 min was rated better. Key words: Pangasius fillet chunks in masala, Fo value, texture profile analysis, retortable pouches, cook value, total process timeThesisItem Open Access STUDIES ON FUNCTIONAL FISH SAUSAGE – ITS CHARACTERISTICS AND SHELF LIFE(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) RAJU KENNAUJE; S.SIDDAPPAJIIn the present study ready to eat, nutrient rich functional fish sausage was developed to enhance consumers health by suitably modifying the ingredient’s composition of traditional standard Japanese fish sausages, with the objectives for Comparative studies between conventional standard fish sausage and functional fish sausage packed in fibrous and krehalon casing and to study the quality changes in both the product’s during storage at ambient (29± 2℃) (AT) and refrigerated storage (6±2 ℃) temperature (RT). Rohu minced meat was prepared from rohu fillet with meat yield of 30% and 54% respectively. Freshness of fish was assessed by organoleptic, biochemical, and microbiological methods. The protein content of meat and bajra flour incorporated fish sausages was 18.68% and 14.59% in C1 and 14.05% in T1 respectively. functional fish sausage was prepared using rohu minced meat, bajra millet flour+ oats (12%), fish oil + vegetable oil (2.5% each), and spice mixture (1.5%), packed in fibrous and synthetic casing, heat processed, cooled and stored. Sample were drawn, every day and once in 7 days for products stored at AT and RT respectively. Fish sausage is a ready to eat protein rich product. The changes in physical (texture, colour, gel strength, folding test), biochemical (PV, FFA, pH TVBN), microbiological (TPC, spore counts) and sensory characteristics of all the products were compared with traditional fish sausages. Products stored at 6±2℃ recorded a very slow rise in biochemical, and decrease in gel strength and organoleptic scores, with increase in storage period. microbial count was higher in fibrous casing products then synthetic casing products. At both storage temperature the self-life of control and functional fish sausages was 2 and 21 days respectively.ThesisItem Open Access COMPARATIVE STUDY OF USING DIESEL AND BIO-DIESEL IN A SINGLE CYLINDER DIESEL ENGINE(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) DONADKAR RUJUTA RAJENDRA; SHASHIDHAR H. BADAMIIn fact the concept of using biodiesel was known since 18th century but now in recent years it is gaining more popularity due to the facts that the depletion of fossil fuels, environmental effect, global warming, the stringent emission standards and international crises of fossil fuels have forced the world to find an alternative fuels. Biodiesel is one of the most important alternative fuel to fossil fuels mainly because it is renewable, nontoxic and environmental friendly and it seems to be a solution for the fossil fuel. The biodiesel can be used in an internal combustion engine with little or no modification to the engine. So based on the importance of use of biodiesel in an internal combustion engine, a comparative study of using diesel and biodiesel tests were conducted as per the Bureau of Indian standard . The tests were conducted by varying the load from no load to full load for standard diesel and for four biodiesels such as Indizel, Dairy Scum Biodiesel [DSB], Waste Vegetable Oil [WVO], and Pongamia Pinnata (Honge) in different blended ratios like B25, B50, B75, B100. Among all Biodiesels, Dairy Scum Biodiesel has received more attention. A maximum BP of 4.504 kW was observed than neat diesel, BSFC of Indizel B75 was higher than diesel i.e., 0.681 kg/kW/hr, Brake Thermal Efficiency of DSB was 30.05 % as compared with other Biodiesels. The least and highest unaccounted heat loss among four biodiesels were DSB B75 [346.49 kJ/kg] and DSB B50 [763.8 kJ/kg] respectively as compared with that of standard diesel [445.37 kJ/kg]. Mann Whitney (U test) was done for all the biodiesels independently. However, DSB, Indizel (B75)and DSB (B75) have shown good value in terms of BP, BSFC and unaccounted heat loss respectively as compared to standard diesel, which is the significant contribution of biodiesels in terms of their performance parameters are concern.ThesisItem Open Access STUDY ON THE INFLUENCE OF FABRICATED VERTICAL PERFORATED CYLINDRICAL AERATOR MODEL ON THE GROWTH OF AQUATIC ORGANISMS(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) DESHBHRATAR DIPALI RAVINDRANATH; VARADARAJU S.; DESHBHRATAR DIPALI RAVINDRANATHAquaculture is the fastest growing food industry in the world. Dissolved Oxygen (DO) concentration is the most important and critical water quality parameter in fish culture because of its direct effect on the feed consumption and metabolism of aquatic animals as well as indirect influence on the water quality. The cost of the mechanical aerators is more and it requires more operational and maintenance cost. So by keeping the above points in view an effort is being made to design and fabricate the vertical perforated cylindrical aerator model. The present study was conducted to assess the influence of the above aerator model on the growth of the aquatic animals. Totally six uniform sized cement tanks each having an area of 25 m2 (5 x 5 x 1 m) were selected for the study in the Research and Instructional Fish Farm at College of Fisheries. In a set of three tanks water was aerated using the above aerator model for the duration of three hours per day and other three tanks were non-aerated which served as control. The preparation of tanks was carried by following the standard procedure and water was filled for a depth of 80 cm. After fifteen days of initial fertilization, thirty uniform- sized fingerlings of common carp (Cyprinus carpio) was stocked in all the tanks for the duration of 105 days. The water sampling was carried out fortnightly in the early morning to study the changes in physical and chemical parameters, the important parameters such as dissolved oxygen, pH, ammonia, free carbon dioxide, nitrate-nitrogen, alkalinity, total-phosphorus, hardness and temperature were tested following the standard procedure. Fish sample was also collected fortnightly during the culture period to study the changes in length and weight gain. Based on the result obtained the DO content in the aerated tanks water was higher during the study period compared to non-aerated tanks water. There is not much variation in the water quality parameters both in the aerated tanks and non-aerated tanks, the same 88 were within the permissible limit required for aquaculture. In the aerated tanks, an average length and weight of the common carp increased from (4.79 ± 0.31 to 24.34 ± 0.46 cm, 5.67 ± 0.06 to 249.65 ± 9.65 g ), while in control tanks it varied from (4.81 ± 0.34 to 23.50 ± 0.23 cm, 4.97 ± 0.29 to 215.57 ± 10.28 g) respectively. It was observed that the growth of common carp (Cyprinus carpio) was higher in aerated tanks when compared to nonaerated tanks. From the present study, it can be concluded that the use of above aerator model can be an efficient aeration system for increasing the DO level in the pond water and there by increasing growth, survival and overall production of fish ultimately increase the profit of the farmers. Key words: Aeration, Dissolved oxygen, Growth performanceThesisItem Open Access EFFECT OF FREEZING AND FROZEN STORAGE EDIBLE OYSTER ITS VALUE ADDED PRODUCT(KVAFSU,BIDAR, 2021) AAISHWARYA G.K.; S.SIDDAPPAJIThesisItem Open Access INFLUENCE OF GAMMA IRRADIATION AND LOW TEMPEARTURE STORAGE ON THE QUALITY AND SHELF LIFE OF COBIA FILLETS (RACHYCENTRON CANADUM)(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2021) SAGARNAIK, C.,; B.MAJANAIKThe present investigation is aimed to study the influence of gamma irradiation (1, 3 and 5 kGy) and subsequent storage at ice (0 °C) and frozen storage temperature (-20 ± 2 °C) on the quality and extended shelf life of Cobia (Rachycentron canadum) fillets. The quality changes and extended shelf life were assessed by evaluating the changes in biochemical, microbial and sensory attributes during different storage conditions. The result revealed that all the biochemical quality indices studied like pH, TMA-N, TVBN, TBARS and PV were within the acceptable limit. Total volatile base nitrogen values for irradiated fish samples were significantly (p<0.05) lower than the non-irradiated samples throughout the storage period, and the rate of decrease was more pronounced in samples irradiated at the higher dose (5 kGy). Thiobarbituric acid reactive substances and peroxide value for irradiated (5 kGy) samples were significantly (p<0.05) higher than the non-irradiated (control) sample. The total microbial load (mesophilic, psychrophilic and coliforms) for the non-irradiated fish fillets samples were higher than the irradiated samples stored at ice (0 oC) and frozen temperature. No definite trend was observed for pH value of both non-irradiated and irradiated samples. Sensory evaluation showed a reasonable and good correlation with bacterial populations with storage time. The result of the investigation revealed that the influence of gamma irradiation and low temperature storage resulted in overall reduction of microbial loads and stabilized the biochemical characteristics of fish fillets. Therefore, irradiation at a low dose of 3 kGy could be used to control the microbial safety and biochemical characteristics of Cobia (Rachycentron canadum) fillets for up to 36 days at ice temperature (0 oC) and 90 days for frozen storage.ThesisItem Open Access EFFECT OF SEAFOOD INDUSTRY WASTE IN POULTRY FEED ON PERFORMANCE OF BROILER AND GIRIRAJA CHICKS(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2021) RUDRAPPA BICHAGATTI; C.V.RAJUInvestigation of the effect of co-dried fish silage (CFS) in poultry feed on performance of Broiler and Giriraja chick, and also comparison of the nutritional quality of prepared poultry feed with commercial feed was done. The sensory evaluation of meat was carried to check the eating quality. The silage was prepared from reef cod (Epinephalus diacanthus) fish waste using 3.5 % (w/v) formic acid and propionic acid mixture (1:1 ratio). The biochemical parameters such as PV, TBARS, TVBN and TMA of the fish silage was estimated as 8.97 ± 0.09 meq. O2/kg of fat, 3.93 ± 0.001 mg malondialdehyde /kg of fat, 48.25 ± 0.09 mg /100 g and 14.28 ± 0.06 mg /100 g respectively. The silage was mixed with crushed corn powder in the ratio of 85:15 (CFS had 39.51 % protein). 120 numbers of Broiler and Giriraja chicks were randomly assigned to 4 dietary treatments (C – Control diet, T1 – Diet with 5% CFS, T2 – Diet with 10% CFS, and T3 – Diet with 15% CFS). Average weekly body weight gain, feed intake and FCR were recorded. At the end of the experiment (6 week) overall FCR, BPEF and livability was also calculated. Later, 10 birds from each group were randomly taken and sacrificed by approved Kosher method to study the meat quality and growth of internal organs. Significant differences were found with weekly feed intake, body weight gain, FCR in Broiler and Giriraja chicks. The dressing yield % was higher in Broiler’s T1 group and Giriraja’s T2 group. The treatment group -T1 (5% CFS) of Broiler and Giriraja chicks had higher BPEF than the other groups. The prepared diets containing CFS showed better storage stability (>2 months) than other diets with lower values of PV, FFA, TPC, fungal count. The present study was concluded that the 10 % CFS could be used as un-conventional protein source for poultry rearing without affecting the growth performance of chicks and eating quality of meat.ThesisItem Open Access COMBINED EFFECT OF IRRADIATION AND LOW TEMPERATURE STORAGE ON THE MICROBIAL, BIOCHEMICAL QUALITY AND SHELFLIFE OF GIFT TILAPIA (OREOCHROMIS NILOTICUS(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2021) HAMEEDALI MULLA; B.MANOJKUMARIrradiation is considered as an efficient and novel method for the preservation of food stuffs and reduction of microorganisms. It has been used to improve the safety, quarantine and shelf life of food products. The present study was aimed at studying the influence of irradiation (1 and 3 kGy) and storage at ice (0oC) and frozen temperatures (-18±2 oC) on the microbial, biochemical qualities, and extended shelf life of GIFT (Oreochromis niloticus). The quality changes and shelf life were assessed by evaluating the changes in biochemical, microbial and sensory attributes during different storage conditions. The results obtained from the study revealed that the biochemical quality indices like pH, TVBN, PV and TBARS were within the acceptable range. The total volatile base nitrogen (TVBN) of the irradiated GIFT fish samples significantly (p< 0.05) decreased in comparison with the control (nonirradiated) throughout the storage period. Thiobarbituric acid values for irradiated (1 and 3 kGy) samples were significantly (p< 0.05) higher than control sample. The non-irradiated samples showed a higher pH than the irradiated ones but there was no significant difference in pH (p< 0.05) between the samples. The effect of irradiation was noticed as the total mesophilic counts, total psychrophilic counts, total coliforms and faecal coliforms counts showed gradual reduction as the irradiation dose increased. Sensory evaluation showed a good correlation with bacterial populations with storage time. The results obtained from the present investigation elucidated that 3 kGy is the safest irradiation dose as it has eliminated the microbial growth and extended the shelf life of GIFT fish to 18 days at ice (0oC) storage and 90 days at frozen (-18±2 oC) storage without affecting the biochemical characteristicsThesisItem Open Access STUDIES ON THE EFFECT OF SQUARE MESH CODEND BY USING DIFFERENT BRIDLE LENGTHS FOR THE TRAWL NET OPERATED ALONG THE MANGALURU COAST OFF KARNATAKA(KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, NANDINAGAR, BIDAR, 2021) HALDANKAR SIDDHANT SHRIKANT; JAYANAIKThe study was carried out to know the efficiency of the bridle lengths and it was attached in between otter boards and wings of the trawl net. The experimental study was carried out once in the fortnight for the depth of 20 m and 25 m with a bridle length of 15 m and 20 m for the respective depths. It was observed that, during trawling square mesh codend covered with diamond mesh i.e. 24 mm to know the retained and escapement catch composition as well as the fuel consumption in both the bridle lengths viz. 15 m and 20 m during the present study. It has been observed that at a depth of 20 m and 15 m bridle length, it has been found that there was a less catch when compared to that of 20 m bridle length. Whereas, for 20 m bridle length at the same depth, the fuel consumption was more in case of 15 m bridle length compared to that of 20 m bridle length. Similarly, at a depth of 25 m for the 15 m bridle length was found to be less catch when compared to 20 m bridle length to the same depth. As far as, fuel consumptions are concerned 20 m bridle length was found to be less fuel consumption when compared to that of 15 m bridle length. However, in the present study for the depth of 25 m and 20 m bridle length was found more suitable, when compared to the depth of 20 m, for both 15 m and 20 m bridle length. Therefore, it has been decided to adopt 20 m bridle length as a standardized bridle length for the trawl net to be operated during the operations of square mesh codend trawl net.
