FT Vol.41(1)
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- ItemInfluence of Socio Economic Variables on Level of Adoption of Prawn/Fish Pickle Making Technology(Society of Fisheries Technologists (India)Cochin, 2004)The study attempts to explore the level of adoption of prawn/fish pickle making technology by coastal fisherwomen and the influence of socio economic variables on the adoption. Level of education, social participation, extension agency contact, mass media exposure, risk orientation and economic motivation were found to be the factors influencing awareness, knowledge level and adoption of the technology
- ItemInduced Ovulation in Catfish Heteropneustes fossilis (Bloch) with Three Native GnRH Peptides(Society of Fisheries Technologists (India)Cochin, 2004)The effect of three native GnRH peptides, viz; salmon GnRH (sGnRH), mammalian GnRH (mGnRH) and chicken GnRH II (cGnRH II), on spawning of the catfish Heteropneustes fossilis (Bloch) was compared. D-Lys6sGnRH, was used as the control. The peptides were synthesized by the Merrifield solid phase method, purified by HPLC and reconstituted in saline. The fish were injected intramuscularly. cGnRH II was more potent than both sGnRH and mGnRH in inducing spawning in this species of catfish. There was no significant difference in the average diameter of the egg obtained using the three peptides
- ItemHypoxic Tolerance of the Young ones of Sea Bass, Lates calcarifer (Bloch)(Society of Fisheries Technologists (India)Cochin, 2004)Maximum tolerance to hypoxia until asphyxiation (loss of equilibrium) in the case of young ones of sea bass, Lates calcarifer was found in sea water, brackish water and freshwater at 30oC and 350C. The hypoxic tolerance observed was comparatively high in sea water, followed by brackish water and freshwater at both 30oC and 350C. The tolerance limit observed was more in sea water, possibly due to less osmoregulation in the natural habitat or due to the metabolic homeostasis.
- ItemFish Protein Dispersion as a Coating to Prevent Quality Loss in Processed Fishery Products(Society of Fisheries Technologists (India)Cochin, 2004)The conventional technique of water glazing has limitation in protecting the products during prolonged frozen storage. A novel fish protein glaze was devised and its superior protective ability in retarding quality losses of frozen fish items as compared with water glazing is demonstrated. The methodology for fish protein glaze preparation involved soaking of fish meat in pieces in excess cold water followed by soaking in dilute acetic acid to induce hydration of proteins resulting in gel formation. Finally hydrated gel was homogenized in water to get protein dispersion to an apparent viscosity of 1 Pa.s. The fish samples were given a dip in dispersions prepared from the same fish meat. Glazing of frozen mince muscle blocks of Indian mackerel (Rastrelliger kanagurta) by a dispersion prepared from mackerel myofibrillar proteins significantly reduced lipid oxidation and dehydration in the product during sfbrage at -170C. Influence of glazing alone or in combination with low dose gamma irradiation was also examined on the shelf life of seer fish (Scomberomorus guttatus) steaks stored in ice. It was observed that while untreated steaks had a shelf life of 15 days, the steaks displayed extension in shelf of 5 and 15 days when subjected to glazing alone or glazing in combination with gamma irradiation at IkGy respectively
- ItemBreeding Performance of Catla, Catla catla (Ham.) Fed with Different Formulated Diets(Society of Fisheries Technologists (India)Cochin, 2004)Breeding performance of catla, (Catla catla) was assessed through feeding trial for three months. Test diets with 30% protein (diet B) and 35% protein (diet C) were developed using a combination of rice bran, groundnut cake and fish meal. The proportion of these ingredients was reduced in diet D and replaced with horse gram, black gram, broken cake, rice and maize. Control diet (diet A) having 25% protein was formulated with 1:1 mixture of rice bran and groundnut oil. The breeding weight loss in females was lower (P<0.05) in treatments A (7.43%) and D (6.37%) and higher in treatments B (8.36%) and C (9.00%) and the difference was significant (P< 0.05). Fecundity, fertilization, hatching and length and weight of hatchlings were the lowest (P<0.05) in fish fed diet A and did not vary (P>0.05) between treatments B and C. Diet D performed superior to diet A in terms of fecundity, percentage of fertilization and hatching and length and weight of hatchlings. Among the different treatments, the highest weight of hatchlings was recorded in treatment D.