FT Vol.57(4)

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    Changes in Electrophoretic patterns of Sarcoplasmic Proteins and Myofibrillar Proteins in Caranx melampygus (Cuvier, 1833) during chilled storage
    (Society of Fisheries Technologists (India), 2020) Hassan, Femeena; Nija, K. V.
    SDS-PAGE studies were conducted to apprehend the changes in the electrophoretic pattern of myofibrillar and sarcoplasmic proteins of Caranx melampygus (Cuvier, 1833) (Blue fin Trevally) during chilled storage. The study revealed that the intensity of Myosin bands were getting reduced during storage. The relative front of myosin band was getting decreased during storage.The relative front on initial day for myosin is 0.331 and it decreased to 0.303 on 12thday of storage. In protein profile, molecular weights of protein bands were found to be 191.8kDa, 99.1 kDa, 52.0 kDa for myofibrillar proteins on initial day, and 200.0 kDa, 101.4 kDa, 51.5 kDa on 12th day. Molecular weights of protein bands were found to be 97.4 kDa, 60.3 kDa, 50.9 kDa, 30.4 kDa, 29.2 kDa, 26.8 kDa, 25.6 kDa, 21.5 kDa for sarcoplasmic proteins on initial day and 97.4 kDa, 61.1 kDa, 52.1 kDa, 45.8 kDa, 34.6 kDa, 30.0 kDa, 26.1 kDa ,21.5 kDa respectively on 12th day. The number of bands for sarcoplasmic proteins and myofibrillar proteins of Caranx melampygus were same on initial day and final day of storage (9 and 3 respectively).
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    Gendered Differences in Nutritional status of Fish Consuming Households in Kerala, India
    (Society of Fisheries Technologists (India), 2020) Jeyanthi, Pe. Jeyya; . Sankar, T.V; Anandan, R.; Mathew, Suseela; Gopal, Nikita
    Abstract Malnutrition, the deficiencies, excesses or imbalances in a person’s intake of energy and/or nutrients, covers two groups of conditions viz., ‘under nutrition’ and ‘over nutrition’. Malnutrition impacts globally across households, communities and countries with 0.46 and 1.90 billion adults being in under and over nutrition conditions, respectively. The level of malnutrition is generally higher among women and children. A cross-sectional study was undertaken to assess the nutritional status in Vadi and Kottarakkara villages, Kollam District, Kerala, India with emphasis on gender differences in the nutritional status of fish consuming households. The Body Mass Index (BMI) of children, adolescents and adults was calculated as per World Health Organisation (WHO) classification. In coastal village, 55% of boys and girls were of normal weight, and in non-coastal village 40.74% boys and 60.47% girls were normal weight. BMI of adolescents showed that 55.17% of boys and 63.64% girls were underweight. Majority of adults (64.71%) showed normal weight which included 56% women and 73% men. There is no prominent gender difference in nutritional status and demography, literacy and job were found to influence the nutritional status of fishers.
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    Process Standardization of Ready-to-eat Pasteurized Crab spread from Marine Blue Swimming Crab (Portunus pelagicus) Incorporated with Threadfin Bream Surimi
    (Society of Fisheries Technologists (India), 2020) Thomas, Seba T. Jiso; Archana, G.; Abhilash, S.; Sabu, S.; Sunooj, K. V.; Gopal, T. K. S.
    Ready-to-eat pasteurized crab spread was standardized from blue swimming crab (Portunus pelagicus) and surimi from threadfin bream (Nemipterus japonicus). Spread was prepared incorporating crab meat and surimi in 1:1 ratio, vacuum packed in monolayer retortable polypropylene pouches with screw cap and pasteurized to core temperatures 86oC[T1] and 89oC[T2] for a total processing time of 90 min and 50 min, respectively. Both the spreads were subjected to proximate, organoleptic and microbial analysis for the assessment of shelf life under chilled condition (3oC) for six months. The pH values of T1 and T2 reduced during the storage period (p<0.001). Total Volatile Base Nitrogen (TVBN), Trimethylamine Nitrogen (TMA-N), Peroxide Value (PV) and Free Fatty Acid (FFA) values were within the acceptable limits up to 176 days of storage (p<0.001). Both the spreads were analyzed for anaerobic growth and found sterile. The crab spread processed at 86oC (T1) showed superior sensory characteristics throughout the refrigerated storage (3oC) and found to be stable and acceptable.
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    Studies on the Diversity and impact of Macro Biofouling Organisms in Brackish Water Finfish Cage
    (Society of Fisheries Technologists (India), 2020) Sunithakumari, K.; Joseph, Shoji; Ajithkumar, P. B.; Smina, M. S.; Priya, N. P.
    Biofouling refers to accumulation of organisms on submerged surfaces. In case of open water cage culture, fouling organisms attached to cage nets block water flow and reduces waste removal resulting in increased stress levels on stocked fishes and reduces the rate of intake of feed and growth. It also increases weight of the nets leading to its damage. The quantity and diversity of biofouling organisms and their effects on the growth and survival of stocked fishes were studied. The study was conducted at Moothakunnam, Ernakulam, Kerala. In the present investigation the data is of one culture period (10 months February - November 2017). The water quality parameters observed are: temperature (24.1°C to 31.7°C), Ph (6.81-7.87), salinity (0-29), light penetration (31.8 cm to 162.475 cm), DO (4.94- 10.528 mg L-1), nitrate (0.016-4.521 mg L-1), nitrite (0 to 0.954 mg L-1), orthophosphate (0.011-0.771 mg L-1) and ammonia (0 to 0.031 mg L-1). Biofouling was found initiated with filamentous algae followed by molluscs dominated by modiolus and other invertebrate organisms. Majority of the fouling organisms observed were molluscs and filamentous algae. Biofouling was highest in areas near the water surface and found reduced with depth. Almost 44.44% of the total net area was affected by biofouling. The total weight of the attachment with net was 3354.88 kg. Macrobiofoulers itself shared a total weight of 658.56 kg and modiolus (90.53%) alone contributed 588.8 kg. Apart from these associated animals like Arthropods, Annelids etc. were also found. Infestation was found increased with salinity and peaked during April-May (29 psu).
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    Effect of the Natural Herb Amla (Phyllanthus emblica) on Growth, Survival and Disease Resistance in Macrobrachium rosenbergii Juveniles
    (Society of Fisheries Technologists (India), 2020) Mohanan, Salini; Nidhin, B.; Harikrishnan, M.; Prabhakaran, M. P.
    Phyllanthus emblica is a natural herb commonly known as Indian gooseberry or amla, belongs to the family Euphorbiaceae, found natively in India and all parts of this plant are used for several medicinal remedies in Ayurveda. Fruits are highly nutritious and rich source of vitamin C, amino acids and minerals and have tremendous pharmacological applications. In this study three experimental diets composed of ingredients such as fish meal, rice bran, Ground Nut Oil Cake (GNOC), wheat flour, vitamin and mineral mix and different quantities of amla (P. emblica) powder were fed to juveniles of M. rosenbergii (PL 16). Three experimental feed T1,T2 and T3 containing amla powder incorporated at the rate of 0.5 g, 1.0 g and 1.5 g was prepared and feed mixture without amla was used as control. General observation to be given here the juveniles fed with T3 showed maximum growth increment (1.92 ± 0.25 g) than T1 (1.15 ± 0.13 g) and T2 (1.72 ± 0.22 g). The mean growth increment with respect to length showed significant variations (p< 0.005) between treatments. The mean weight of individuals in T2 and T3 groups varied significantly compared to control. FCR values were found in T1 (1.19), comparatively better than T2 (1.59), T3 (1.66) and control (1.91). Whereas SGR values increased from 0.47 to 0.67 from control to T2. The highest percentage survival was recorded in T2 (100 ± 0) during study. In the bacterial challenge test against Aeromonas hydrophila, post larvae fed with T3 (1.5 g 100 g-1) feed showed better survival percentage
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    Consumers’ Preference for Dried Fish with Emphasis on Packaging in Dhaka city
    (Society of Fisheries Technologists (India), 2020) Islam, Md. Towhidul; Chowdhury, Paromita; Jahan, Syeda Nusrat; Flowra, Fawzia Adib; Islam, Md. Tariqul
    Consumers’ preference for dried fish with emphasis on packaging in Dhaka city was investigated by survey method using a structured questionnaire. A total of 45 consumers (15 in each market) in the open-air retail markets of Dhaka city were selected by purposive sampling technique. Majority of the respondents were male (84%), in the age group of 15-59 years (84%) and having below the Higher Secondary Certificate (HSC) level of education (75%). Most of the consumers (73%) came from the low-income groups. Around 87% like to eat dried fish. Around 53% of consumers buy dried fish weekly, and they spend monthly on an average of 370 BDT. More than 90% of consumers preferred to consume dried fishes with satisfaction on the existing quality. However, 96% of consumers also showed a willingness to pay 10-15% higher price if packaging and quality are improved. Based on the consumers’ preferences, this study indicated that there is good potential for quality packaged dried fishes, which is readily accessible and affordable for the consumers.
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    Life Cycle Assessment based identification of Environmental Hotspots in Commercial Trawl Fisheries of Kerala and Mitigation Strategies
    (Society of Fisheries Technologists (India), 2020) Ravi, Renju; Das, P. H. Dhiju; Edwin, Leela
    Life Cycle Assessment (LCA) is used to identify environmentally preferred products or processes and can be used as a support tool for decisionmaking and policy development. In India, LCA of trawl fishing, wherein impact categories such as Global warming potential (GWP), Abiotic depletion potential (fossil) (ADP), Acidification potential (AP), Eutrophication potential (EP), Marine aquatic ecotoxicity potential (MAETP), Ozone layer depletion potential (ODP) and Photochemical ozone creation potential (POCP), are not studied. In this study, LCA and carbon footprint of fish production by trawlers operating in Kerala fisheries sector has been carried out. Direct energy input for fishing operations due to consumption of fuel account for 75 to 90% of the total energy inputs when compared with energy inputs associated with vessel construction and maintenance, fishing gear and others. The study showed that, the impact categories such as GWP, ADP, AP, EP and POCP are predominantly related to the consumption of diesel for vessel operation and hence identified as the main hotspot with respect to environmental burdens which need focussed action in mitigation approaches. The results of this study delineates approaches for reducing carbon footprint of the trawl caught resources in Kerala.