Engineering

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Now showing 1 - 20 of 82
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    Advanced drying techniques for fish
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Delfiya, D.S.A.
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    Advances in elelctronics and measurments in fishery technological investigstions
    (CUSAT, Cochin (India), 1995) Sivadas, T.K.
    Fishery technology is a multidisciplinary subject warranting integrated approach for its development coordinating a variety of biological and technological disciplines. The complex and hostile nature of the environment where the fishing technological investigations are carried out further necessitates the evaluation of the operational features of the dynamic systems as well as estimation of the physical, chemical, biological and mateorological values of the sea related to fishery resources. The recent developments in microelectronics and space exploration have made revolutionary changes in acoustic fish detection methods, precise navigation, safety in the sea and satellite remote sensing techniques for fishery forecasting. The efforts made in CIFT show the scope and utility of a series of electronic instruments for monitoring the performance of fishing gears, fishing crafts, water quality and the marine environmental parameters. The instruments developed in CIFT using fully indigenous technology are aimed at to make scientific studies on the multidiscplinary nature of the marine environment in relation to the fishing efforts so as to achieve sustainable exploitation of the resources and self reliance in the technology. The paper gives an account of the recent advancements in electronics along with the specific contributions made indigenously.
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    Advances in fishery engineering
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Samuel, M.P.; Shyma, P.K.
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    The application of ultrasonic in fishing industry and resarch- Part II
    (Seafood Exporters Association of India, Cochin, 1969) Sivadas, T.K.
    Efforts made to improve the sonar equipments for better performance in fisheries field is presented in the paper.
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    Application of ultrasonics in fishing industry and research - Part I
    (Seafood Exporters Association of India, 1969) Sivadas, T.K.
    The artichle discribs the application of ultrasonics in fishing industry.Ultrasonics is the very importent technic for underwater mesurement. It deals with ultrasonics for underwater use, sonar and its applications echo sounder and fish finder. The fecilities in modern fishing finder are white line, time signels, rangers, Visual indiction of signels , CRT display and underwater scaning system.
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    Artificial Dehydration in Seafood industry
    (Seafood Exporters Association of India, 1975) Chakrabothy, P.K.
    This article deals with the artificial dehydration of seafood industry and the application of different types of dryers and its ussage.
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    Assemblage patterns and community structure of macro-zoobenthos and temporal dynamics of eco-physiological indices of two wetlands, in lower gangetic plains under varying ecological regimes: A tool for wetland management
    (Elsevier, 2019) Meena, D.K.; Lianthuamluaia, L; Mishal, P; Swain, H.S; Naskar, B.K; Saha, S; Sandhya, K.M; Kumari, S; Tayung, T; Sarkar, U.K; Das, B.K
    Wetlands are rich biological resources and support livelihood and nutritional security to a huge populace globally. In the present study, two ecologically distinct floodplain wetlands viz., Khalsi and Akaipur located in the sub-basin of Jamuna river in lower Gangetic basin, were studied for abundance, species richness and diversity indices of macro-zoobenthic communities across four seasons. The selected wetlands vary in terms of ecological regimes such as, water volume, depth, link channel, agricultural runoffs, macrophyte coverage etc. Khalsi, a seasonally open beel (wetland) that occasionally exchange water with river Jamuna during high flood, while Akaipur is a closed beel with no exchange of water. The studies indicated higher community richness in macrophyte dominated seasonally open Khalsi wetland (22species) as compared to closed Akaipur wetlands (20 species). The community abundance was higher in Khalsi (8496 nos/m2) as compared to Akaipur. Average Dominance, Simpson and Shannon diversity indices for Khalsi and Akaipur were calculated as 0.3, 0.7 & 1.5 and 0.2, 0.8 & 1.7, respectively. The community structure of wetlands revealed dominance of a single group, gastropoda (99%), followed by bivalvia (0.64%), diptera (0.27%) and oligochaeta (0.09%) in Khalsi, whereas, Akaipur depicted community structure with dominance of gastropoda (46.18%) followed by oligochaeta (41.36%), diptera (11.22%) and bivalvia (1.24%). The trophic state index (TSI) based on chlorophyll a (Chla), Secchi disc transparency and total phosphorus showed significant (p < 0.05) variations in both wetlands between different seasons. The water quality parameters were also significantly (p < 0.05) differ in both the wetlands except dissolved oxygen. The CCA components, CCA1 and CCA2 explained 27.59% and 23.95% and 39.78% and 15.26% of the species environment correlation in Akaipur and Khalsi, respectively. The distribution range of macro-zoobenthos varies 0.30–0.92 and 0.26–0.96 in Khalsi and Akaipur, respectively. The study revealed better ecosystem health of Khalsi beel in sustaining aquatic diversity while Akaipur beel is succeeding towards super eutrophic state. Thus, the present study provides baseline information on assemblage patterns and community structure of macro-zoobenthos in two important wetlands for sustainable management of the aquatic bioresources.
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    Autobrinometer
    (Society of Fisheries Technologists (India), 1982) Vijayabharathi, K.; Ramakrishnan, K.; Sivadas, T.K.
    An instrument developed for the rapid and accurate measurement of brine concentrations during blanching without disturbing the routine blanching operation is described. The concentration is sensed by a plantinum electrode conductivity cell and displayed in a moving coil meter after conversion of the electric signals into D.C. voltage. The instrument can measure in the range 5 to 12% with an accuracy of plus or minus 1%. The errors caused mostly are those due to wide temperature variations of the brine between 95 to 102 degree C and the unknown quantities of protein.
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    Calibrations of hydro-acoustic instruments onboard FORV Sagar Sampada
    (FORV Sagar Sampada, (Department of Ocean Development, New Delhi), 1996) Natarajan, S.; Kasim, M.; Gopakumar, G.; Ravindranathan, V.; Ramakrishnan, A.
    Calibration is carried out to keep up the precition of the instrument by determinig their caliber. Calibration of hydro-acoustic equipment onboard FORV Sagar Sampada was carried out periodically and the performence record weree maintained. Deviation and the defficiencies were noted down for applying correction while interpriting the output of the instruments.
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    CIFT electonics for agricultural investigations
    (CIFT, 1994) Sivadas, T.K.
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    Conservation of energy in fish drying
    (Society of Fisheries Technologists (India), 2010) Joshi, P.N.
    The total fish production in India is 6.4 million t of which about 3,4 million t is from inland and 3.0 million t from marine sources (Ayyappan and Diwan, 2007). Fish are an extremely perishable foodstuff. Spoilage occurs as the result of the action of enzymes (autolysis) and bacteria present in the fish, and also chemical oxidation of the fat which causes rancidity.
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    Design and fabrication of a tilting kettle for fish processing industries
    (Society of Fisheries Technologists (India), 1982) Joshi, P.N.
    An electrically heated stainless steel jacketed kettle of 80 litter capacity working at a steem pressure of 1.06 kg f cm -2 has been designed and fabricated for cooking fish and prawn in the fish processing industry. The equipment which is provided with tilting arrangement and operetional controls aloows cooking at a constant temperature under highgienic conditons . The details of the disign, construction and operation are discribed the cost of equipment is about Rs.8000. The economics of operation are also presented.
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    Design and working principles of CIFT solar hybrid dryers
    (ICAR - Central Institute of Fisheries Technology, Cochin, 2019) Alfiya, P.V.; Murali, S.; Delfiya, D.S.A.; Samuel, M.P.
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    Design of a detachable type fish drier
    (Society of Fisheries Technologists (India), 1986) Pillai, S.A.; Prabhu, P.V.; Balachandran, K.K.
    The paper describes the design of a detachable type fish drier which has been designed to operate on commercial scale . The drier with a raw material capacity of one tonne has been designed after effecting all improvements on the design of the existing tunnel driers available in India. The cost of one drier works out to Rs. 2,16,700/- approximately.
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    Design of a half ton dehydrator for fish
    (Society of Fisheries Technologists(India),Cochin, 1964) Swaminath, M.
    A half-ton capacity artificial dryer has been designed at the Central Institute of Fisheries Technology for drying fish like Mackerel, Sardine, White Bait etc. The dryer is a hot air recirculation type 80 K.W. thermostatically controlled beating coils are made use of for heating the air. The air is circulated by means of an axial flow pattern fan. Drying takes place at a temp. of 115 degree F. The structure of the dryer to be made of Anjili wood. The cost of one dryer comes to about Rs. 20,000/-.
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    Design of refrigerated sea water plant for preservation of fish
    (Society of Fisheries Technologists (India), 1974) Pillai, A.S.
    To study the feasibility of employing refrigerated sea water on board fishing vessels for the preservation of fish, a pilot model has been designed, the details of which are presented in this paper .
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    Development of a fish pump
    (Society of Fisheries Technologists (India), 1982) Namboodiri, K.S.
    Pump fishing techniques can be applied to all shoaling fish or in a fish shoal which is created by some attraction method. The normal centrifugalpumps and reciprocating pumps have moving parts inside the pump and which works on the principle of pressure difference created by compressed air-water mixture. The accessories required for installation on boat are also described.
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    Development of a fishing log for use in trawlers
    (Society of Fisheries Technologists (India), 1989) Sivadas, T.K.; Ramakrishnan, K.; Vijayabharathi, K.
    The paper describes the technical and operational features of a composite equipment for simultaneous measurement of 5 important parameters, warp load, boat speed, water temperature, water salinity and air temperature pertaining to the craft, gear and the environment. The equipment is designed for continuous measurement in small and medium crafts easily without disturbance to routine fishing operations. The system operated on 9V supply, is suitable for portable operations from one vessel to another. The compact electronic meter kept in the wheel-house displays the data one by one in engineering units.
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    Development of a torque meter for fishing vessels
    (Society of Fisheries Technologists (India), 1984) Pillai, S.A.; Thampi, S.T.
    The paper describes the development of an electronic instrument to measure the torque developed on the propeller shaft of fishing vessels at various speeds of the propeller. By measuring the torque, it is possible to determine the actual power transmitted from the engine gear-box unit to the propeller so that propeller efficiency can be evaluated and the optimum size of the propeller for a specific engine and vessel can be determined.
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    Development of an apparatus for humane method of killing frogs for frogleg processing industry
    (Seafood Exporters Association of India, 1985) Pillai, S.A.
    The paper discribes thedevelopment of an apparatus which can be used to give electric shock to the frogs so that they can be killed without pain during the stunned period.