2009

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    Adoption of good management practices by aquafarmers
    (Society of Fisheries Technologists (India), Cochin, 2009) Jeeva, J.C.; Balasubramaniam, S.; Srinath, K.
    The study was conducted among the aquafarmers in four selected districts viz., Trichur, Alleppey, Ernakulam and Kannur in Kerala. Data were collected on the extent of adoption of good management practices among the sample respondents. Of the 10 practices evaluated, the adoption scores were higher for six practices viz., preparation of ponds (93.15%), eradication of predators and weeds (85.39%), use of PCR tested seeds (84.47%), use of recommended feeding schedule (77.63%), water exchange and quality monitoring (71.69%) and harvesting after prescribed days of culture (70.32%). The extent of adoption of each practice varied significantly (p < 0.01) among the aquafarmers with the overall mean adoption score of 70.09% (n=73). The variables viz., number of training programmes undergone, number of information sources utilized and expert services availed, were found to have positive relationship with the extent of adoption. Regression analysis revealed that of the seven variables, only one variable viz., number of training programmes undergone had contributed significantly (p < 0.05) towards the extent of adoption of improved practices.
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    Adoption of hygienic practices at fish landing centres and markets
    (Society of Fisheries Technologists (India), Cochin, 2009)
    The study was conducted at the fish landing centres in selected four districts of Kerala viz., Trichur, Alleppey, Ernakulam and Kannur, and the fish markets in Ernakulam district. In the case of landing centres, of the six practices evaluated among the fishermen, the adoption score was higher for only one practice viz., use of clean containers for fish handling (81.03%). Low level of adoption was observed on two practices viz., use of adequate clean water for washing fish (39.49%) and prompt system of waste disposal (40.00%). The overall adoption index was 54.96%. The 'F' test results revealed that the extent of adoption varied significantly among the fishermen in the four districts. The perception index for the impact of popularization efforts undertaken among fishermen was 55.26%. The R super(2) value indicated that all the variables put together served as a cause of 71.60% variation in the adoption level. In case of fish markets, the overall index for the availability of infrastructural facilities was 79.74%. The fish marketing personnel were well aware of all the seven hygienic practices studied, with the overall awareness index of 93.60%. Of the six hygienic practices measured, practices such as the use of clean containers or polythene sheets for keeping fish (89.55%), using adequate clean water for washing (98.51%), sorting of fish hygienically in a clean place (84.33%), using adequate ice for preventing fish spoilage (98.51%) and maintaining personal cleanliness and handling of the fish hygienically (94.78%), were adopted by majority of the respondents. Lower adoption was observed in the case of using prompt methods of waste disposal (68.66%). The regression analyses revealed that education positively influenced the extent of adoption among the fish marketing personnel.
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    Analysis of Urban Consumer Behavior for Fish in Tripura
    (Society of Fisheries Technologists (India)Cochin, 2009) Upadhyay, A.D.; Pandey, D.K.
    The consumer behavior towards fish consumption in Tripura is studied to analyze income and expenditure patterns of fish consumers' in urban area of Tripura and to examine consumers ' purchase and usage habits for fish. For the collection of data on households' income and expenditure, consumption of animal proteins and consumers' attitude towards fish consumption, 80 respondents were randomly selected from Agartala city, using cluster sampling technique. The information on income and expenditure of households, consumption pattern of fish and other non-vegetarian items and attitude towards fish consumption were collected through personal interview. The per capita fish consumption of fish in study area is higher than the consumption c chicken and mutton. The fish consumers prefer small sized, live/fresh and locally produced fish. The market prices of locally produced fishes are almost double than the fishes arrived from other states.
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    Antidumping investigations on shrimp exports from India to US - a case study
    (Society of Fisheries Technologists (India), Cochin, 2009) Gopal, N.; Geethalakshmi, V.; Unnithan, G.R.
    The anti-dumping investigation against India and five other major shrimp exporting countries by the US was initiated in December 2003. This paper examines the impact on the quantity and value of shrimp imports from these countries in general and India in particular, during the period of investigation and after. It was observed that there has been a negative impact on Indian shrimp exporters and the number of exporters has decreased considerably. The effect on the price in the US market has been negligible with the unit value of imports actually falling. Only a short-term rise in price index was observed during the initial phase of the investigation period as well as the period when the affirmative decision was announced.
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    Effect of cyclic loading on polyamide monofilament yarn used in monolining
    (Society of Fisheries Technologists(India),Cochin, 2009) Thomas, S.N.; Edwin, L.
    The aim of the present investigation is to study the effect of repeated loading on the breaking load and elongation of polyamide monofilament yarns used as branch line of tuna long line.
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    Effect of hydrocolloids on the functional properties of batter mix used for the preparation of coated shrimps
    (Society of Fisheries Technologists (India), Cochin, 2009) Abbas, A.R.; Ninan, G.; Joseph, A.C.; Ravishankar, C.N.
    n the present study, the effect of the addition of three different hydrocolloids viz. Guar Gum (GG), Carboxy Methyl Cellulose (CMC) and Carboxy Methyl Chitosan (CMT) on the functional properties of batter mix used for the preparation of coated shrimps was investigated. The maximum viscosity was noticed in batter containing GG at 1:2 dilution followed by batters containing CMC and CMT. Among the three batter systems, GG based batter showed highest shear thinning behavior and indicated maximum viscosity at lower dilutions and lower shear rates. Compared to the other two batters, GG based batter indicated maximum water retention capacity irrespective of temperatures and dilutions. In coated shrimps, the highest pick up was observed with GG-based batter, followed by CMC and CMT based batters. Thus, in terms of functional properties and batter consistency, GG based batter mix was found to be superior to the other two batter mixes.
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    Effect of tow duration on the capture efficiency and catch characteristics of bottom trawl
    (Society of Fisheries Technologists (India), Cochin, 2009) Madhu, V.R.; Panda, S.K.
    The catching performance of a 34 m High opening bottom trawl (HOBT) was studied with tow durations of 15, 60 and 120 min each and with two towing speeds (0.87± 0.03 and 1.36 ± 0.03 ms-1) to find out changes in the species retention and escapement in terms of weight and number from the codend. Variations in the retention and escapement catch per unit effort (CPUE) in terms of weight and number for the different tow durations were compared. Although, the mean catch rate expressed as mean CPUE was found to be consistently higher in·the 15-min haul, the difference was not statistically significant from that of 60 and 120-min hauls. Within and between hauls variation in catch rate of six species (as determined by SIMPER analysis) was studied using univariate GLM with tow duration and speed· as categorical predictors. The catch rates of three species Trichiurus lepturus, Lactarius lactarius and Uroteuthis (Photololigo) duvauceli were found to be significantly different due to tow duration effect, but neither speed nor the interaction effect had any significant effect on the catch rates for these species. The mean diversity, dominance and evenness indices showed no significant difference among the hauls of different tow durations. Based on the results of the study, it is concluded that the short duration tows of 15-min are as effective as the 60 and 120- min tows Jr estimating catch per unit effort in terms of total weight, number and diversity indices.
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    Functional properties of fish proteins : a review
    (Society of Fisheries Technologists(India),Cochin, 2009) Sankar, T.V.
    Proteins possess a number of physiochemical characteristics which facilitates their varied food applications. Proteins exhibit a wide range of functionality and versatility during processing. Functional properties of proteins are mainly due to its interaction with other components within the food system. The structure of protein is highly dependent upon the environment and protein assumes different conformations depending upon the conditions of exposure. The surface hydrophobicity plays a major role in the functional properties of a protein and changes in the inherent characteristics influence protein structure which have profound influence on the functional properties of the protein.
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    Level of Knowledge of Brackishwater Shrimp Farmers about the Improved Practices in Shrimp Farming
    (Society of Fisheries Technologists (India)Cochin, 2009) Kappen, Daisy C.; Thomson, K.T.
    The study was undertaken to ascertain the level of knowledge of brackishwater shrimp farmers about the improved practices in shrimp farming in the State of Kerala and to find out the relationship of socio-psychological and economic characteristics with level of knowledge. A group of 100 shrimp farmers from six maritime Districts of Kerala State viz., Kollam, Alappuzha, Ernakulam, Thrissur, Kozhikode and Kannur was selected using Proportionate Random Sampling technique which constituted the sample for the present study. The results of the study show that majority of the respondents possessed medium level of knowledge (93%). Only five per cent of the farmers possessed high level of knowledge while two per cent had low level of knowledge in brackish water shrimp farming. Age, occupation, experience, annual income, farm- size, and indebtedness showed non - significant - association with level of knowledge of brackish water farmers whereas, education, information source utilization, risk orientation, social participation, marketing orientation and extension participation were positively and significantly correlated.
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    Optimization of gelatin extraction from the skin of freshwater carps by response surface methodology
    (Society of Fisheries Technologists (Indian), 2009) Ninan, G.; Joseph, J.; Zynudheen, A.A.; Mathew, P.T.; Geethalakshmi, V.
    Response Surface Methodology (RSM) was used to determine the optimum operating conditions for extracting the gelatin from the skin of three species of freshwater carps viz., Rohu(Labeo rohita), Common Carp (Cyprinus carpio) and Grass Carp (Ctenopharyngodon idella). From the screening experiments, four independent variables viz., alkali pretreatment concentration, acid pretreatment concentration, pretreatment time and extraction temperature were identified as the critical variables that had significant effect on the extraction of gelatin from the skin of these species. The responses studied were gel strength and yield. The optimum gelatin extraction conditions from the skin of three species based on the responses were 51.35 minutes (pre-treatment time) and 49.33C (extraction temperature) for Rohu skin; 60 minutes (pre-treatment time) and 57.97C (extraction temperature) for Common Carp skin; 60 minutes (pre-treatment time) and 40C (extraction temperature) for Grass Carp skin. The gelatin from the skin of the freshwater carps showed high yield, medium gel strength and high viscosity.
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    Technology development efficiency and socio personal characteristics of researchers in marine fisheries
    (Society of Fisheries Technologists (India), Cochin, 2009) Jeeva, J.C.; Vasanthakumar, J.; Balasubramaniam, S.; Geethalakshmi, V.
    This paper deals with the assessment of the technology development efficiency among the researchers in marine fisheries and identification of the influencing socio-personal characteristics. The study was conducted among 72 researchers of two premier fisheries research Institutions. The results revealed that the technology development efficiency index was 88.51 plus or minus 10.01. Among the 15 variables studied, the variables viz., communication behaviour, extent of linkages with extension and clientele systems, time utilization in research, participation in professional bodies, in-service training undergone, job satisfaction, job performance and technologies generated had positive and highly significant relationship with the technology development efficiency. The R super(2) value indicated that all the variables taken together served as cause for explaining 57.60 % of variation in the efficiency level in the technology development process. The present results establish that the technology development process is efficient in marine fisheries.
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    White Tail Disease: A Viral Disease of Giant Freshwater Prawn, Macrobrachium rosenbergii (deMan)
    (Society of Fisheries Technologists (India)Cochin, 2009) Haridas, Divya V; Pillai, Devika; Nair, C. Mohanakumaran; Sherief, P.M.
    Virus borne diseases are extremely difficult to control and constitute one of the major problems of prawn farming. Till recently, the giant freshwater prawn, Macrobrachium rosenbergii was regarded as disease resistant. But there have been recent reports on white tail disease (WTD), a virus borne disease of M.rosenbergii affecting the aquaculture industry of India. In this review, clinical signs, causative agents, mode of transmission and various diagnostic methods of white tail disease are discussed.