2017
Permanent URI for this community
Browse
Browsing 2017 by Issue Date
Now showing 1 - 18 of 18
Results Per Page
Sort Options
- ItemTemporal Variability of Size-fractionated Chlorophyll a Concentration and Influence of Chemical Parameters in Coastal waters of South-eastern Arabian Sea(Fishery Technology, 2016) Minu, P.; Souda, V. P.; Ashraf, P. MuhamedPhytoplankton size structure influences the underwater light field and determines the fate of carbon in a pelagic food chain. Temporal and vertical variations of size fractionated chlorophyll a concentration (Chl-a) were investigated along coastal region off Kochi from May 2013 to April 2014 in order to understand the influence of environmental parameters on phytoplankton size distribution in coastal waters of South-eastern Arabian Sea. The study identified abundance of microphytoplankton around 10m depth, nanophytoplankton from surface to 5m depth and picophytoplankton in 10-20m water column. The results also showed that increased nitrate and phosphate concentration favoured nanophytoplankton growth and increased silicate concentration favoured the growth of microphytoplankton. Pre-showers and extended southwest monsoon along with variation in nutrient concentrations in the area during the study period significantly influenced the variation in size fractionated chlorophyll, absorption by phytoplankton and its numerical density. The results will provide an insight into the chemical factors that control the production cycle in this neritic system and can be used to improve the size fraction algorithms for various societal applications of remote sensing.
- ItemIdentification of Key Factors to Negotiate Spontaneous Spawning of Clarias batrachus in Confinement(Fishery Technology, 2017) Priyadarshi, Himanshu; Singh, A. A.; Jamoh, Neriyang; Chakraborty, Puja; Bogi, Rasidamad; Singh, S. B; Mallik, Abhijit; Mahendrajit, Amom; Khuman, O. N; Paul, Tapas; Das, RekhaClarias batrachus do not spawn spontaneously in confined conditions even after induction using synthetic hormones. Current hatchery techniques for seed production of the species involves fertilization of stripped eggs using ground testes suspension from a sacrificed male. The study report the elicitation of spontaneous spawning in C. batrachus and the successful hatching of the eggs collected there from. The mature males and females were induced using ovatideTM and released into a gently sloping drain planted with paddy saplings. The fertilized eggs were collected 24 h post injection and transferred to a flow-through device for incubation. It is observed that bilateral injection of ovatide in combination with complete exclusion of light and total simulation of the natural breeding grounds of the species have positive influence on spontaneous spawning in confinement. With finer refinements, it would be possible to have more control and success in terms of spontaneous spawning and easy collection of the eggs, which is desirable for a commercial hatchery.
- ItemDigitization of Inland Water Resources for Fisheries through Remote Sensing and Geographical Information System - A Study in Ratnagiri District(Society of Fisheries Technologists (India),cochin, 2017) Lokhande, P.C; Shirdhankar, M.M; Chaudhari, K.J; Sawant, M. S.Natural inland aquatic resources such as rivers, creeks, mangroves as well as manmade resources such as reservoirs, shrimp farms and shrimp hatcheries of Ratnagiri district were mapped using Remote Sensing and Geographical Information System (GIS). IRS P6 LISS III images were used for mapping. A total of 10 rivers, 24 creeks and 2435.16 ha of mangrove area were identified and mapped. There are 65 reservoirs, 40 shrimp farms and 2 hatcheries in the district. Digital maps of each resource with details were incorporated using GIS techniques. IRS P6 LISS III images with 23 m resolution can be processed after enhancing resolution to 15 m by merging with Landset ETM+ image to map inland fisheries resources through Geographical Information System.
- ItemEfficacy of Sodium Tripolyphosphate and Non-Phosphate Additives on the survival of Vibrio parahaemolyticus on Prawns (Fenneropenaeus indicus) (H. Milne-Edwards, 1837) during Frozen Storage(Society of Fisheries Technologists (India),COCHIN, 2017) Bini, Francis; Sudha, Santha; Hatha, A. M.Use of sodium tripolyphosphate (STPP) and nonphosphate additives (NP1) in combination with sodium chloride is practised in soaking to prevent drip loss while thawing the frozen shrimp. In the present study, we have determined the efficacy of these additives on the survival of Vibrio parahaemolyticus on prawns (Fenneropenaeus indicus), during block freezing and individual quick freezing conditions. Freshly harvested prawns were beheaded and treated with a blend solution containing STPP/NP1 at 3 g 100 ml-1 in combination with sodium chloride at 2g 100 ml-1, in two separate experiments. At appropriate time intervals, whole prawns were sampled and dilutions plated onto TCBS agar medium to determine the number of V. parahaemolyticus. Experiments were performed in triplicate. Results indicated that STPP treated samples exhibited significant (p<0.05) reduction in the number of V. parahaemolyticus at any given time in both frozen conditions over the course of storage period as compared with non- phosphate treated samples. On the other hand, control samples (water dip) showed a gradual reduction in the number of organism, which is attributed to freezing. Therefore, sodium tripolyphosphate can be used as a promising drip loss preventer as well as an antimicrobial, to enhance the safety of frozen seafood.
- ItemAntioxidative effect of pineapple peel extracts in refrigerated storage of Indian Mackerel(Society of Fisheries Technologist(India), 2017) Uchoi, D.; Raju, C.V.; Lakshmisha, I.P.; Singh, R.R.; Elavarasan, K.
- ItemDigestibility of Dry Matter and Nutrients from Azolla pinnata by Labeo calbasu (Hamilton, 1822) with a Note on Digestive Enzyme Activity(Society of Fisheries Technologists (India),cochin, 2017) Gangadhar, B; Umalatha, H.; Hegde, G; Sridhar, NDigestibility of feed ingredients in the compounded diet is an important factor affecting the growth of fish. A study was conducted in indoor plastic tubs to estimate the in vivo digestibility of dry matter and nutrients by a minor carp Labeo calbasu for a nonconventional feed ingredient – azolla, incorporated at levels ranging from 0-40% using crude fibre as the marker. The activities of major digestive enzymes were also estimated in the gut of fish fed varied levels of azolla. The digestibility values were the highest (p<0.05) at 10% azolla inclusion level. While the total dry matter digestibility and fat digestibility values of control diet were comparable with that of azolla diets up to 30% incorporation, with a decline thereafter; protein and NFE digestibilities were comparable up to 40% incorporation. Activities of majority of digestive enzymes were the highest (p<0.05) at 10% azolla incorporation level showing a decreasing trend at still higher levels. The study reveals the usefulness of azolla for inclusion in calbasu diets. Azolla can be used up to 30% without affecting the digestibility.
- ItemOccurrence of Low Value Bycatch in Trawl Fisheries off Karnataka, India(Society of Fisheries Technologists (India),COCHIN, 2017) Mahesh, V; Benakappa, S; Dineshbabu, A.P; Kumar Naik, A.S; Vijaykumar, M.E; Khavi, MuttappaBottom trawling in the most effective method of shrimp capture but highly intensive trawling adversely affects benthic ecology and biodiversity. The present study is aimed to throw light on low value bycatch (LVB) landings and catch composition of trawl boats, at Mangaluru fisheries harbour. The quantity of fish landings by single day trawlers (SDT) during 2012-14 was 2 151.3 t y-1, of which 61.8% was considered as edible grade and 38.2% was LVB. Multiday trawlers (MDT) landed an estimated 165917.2 t of fishes/yr, out of which 79.6% were marked for edible use and remaining 20.4% was landed as LVB. LVB to target group ratio for SDT and MDT landings was 1:1.66 and 1:3.93, respectively. The LVB of MDT consisted of 121 finfishes belonging to 82 genera, 55 families and 13 orders. An estimated 47.53% of the finfish LVB landing by weight (56.1% by number) was contributed by juveniles of commercially important species and the estimated resource loss was 14044 t by weight and 11000 million in number. From the fishery resource conservation and sustainability point of view, the magnitude of resource damage due to trawl bycatch is alarmingly increasing. The study recommends using trawl nets with 35 mm square mesh codend, effort reduction in critical fishing grounds and adoption of Juvenile Fish Excluder cum Shrimp Sorting Device (JFE-SSD) which minimizes juvenile fish catch.
- ItemDepredation and catch loss due to the interaction of aquatic organisms with ring seines off Cochin Region(Society of Fisheries Technologist(India), 2017) Raphael, L.; Joseph, R.; Edwin, L.
- ItemEffect of Light Spectra on Growth Performance and Immune Response of Koi Carp, Cyprinus carpio (Linnaeus, 1758)(Society of Fisheries Technologists (India),cochin, 2017) Bairwa, Mukesh Kumar; Saharan, Neelam; Rawat, Kiran Dube; Tiwari, Virendra Kumar; Prasad, K. PaniThe present study was undertaken to assess the growth performance and non-specific immune response of koi carp, Cyprinus carpio exposed to lightemitting diodes (LEDs): blue (450 nm), green (530 nm), yellow (530 nm) and red (630 nm) under long photoperiod (16 h light) for 90 days. White fluorescent light (simulated natural photoperiod, SNP) was used as control. Growth performance of fish was higher (p<0.05) in blue-LED and green-LED exposed groups with significantly higher weight gain percentage, FER and SGR and lower FCR. The concentrations of stress indicators: (cortisol and glucose) were significantly (p<0.05) higher in yellow-LED, red-LED and for control fish group. Total protein, globulin protein, lysozyme activity and respiratory burst activity was significantly higher (p<0.05) in blue-LED and green-LED exposed fish groups whereas, yellow-LED and red-LED exposed fish recorded decline in this parameters after 60 days. The present study recommends that blue and green lights are suitable for better growth and improving the non-specific immune system of koi carp.
- ItemConfirmation of ciguatoxin fish poisoning in red snapper, Lutjanus bohar (Forsskål, 1775) by mouse bioassay(Society of Fishery Technologists (India), 2017) Rajisha, K.; Kishore, P.; Panda, S.K.; Ravishankar, C.N.; Kumar, K.A.
- ItemBiochemical, microbial and sensory changes of Bombay duck (Harpodon nehereus) fish fingers during chilled storage(Society of Fishery Technologists (India), 2017) Jeyakumari, A.; Murthy, L.N.; Visnuvinayagam, S.Bombay duck (Harpodon nehereus) is one of the important fishery species along Gujarat and Maharashtra coasts. Due to a very high moisture content (90%), it is unsuitable to use either in fresh or in frozen form and almost entire catch is consumed in sundried form. This study is aimed to explore the possibilities of better utilization of this species by development of battered and breaded fish fingers. Fish fingers were prepared from Bombay duck fillet and their qualities were evaluated under chilled storage up to 21 days. Fish fingers had 52.43% moisture, 12.25% protein, 10.17% fat, 2.03% ash and 23.12% carbohydrate. Results showed increasing trend in pH, TVB-N, FFA, PV and TBA values (p<0.05) during storage. Microbiological analysis revealed that total plate count of fish fingers was within the acceptable limit (1.29 x 104 cfu g-1 on 21st day) throughout the storage period. Sensory evaluation showed decrease in overall acceptability of fish finger during chilled storage. Results indicate that fish fingers from Bombay duck can be stored for 15 days in 4°C without change in sensory quality.
- ItemSquare mesh window for reducing hilsa juvenile bycatch in stationary bagnets(Society of Fishery Technologists (India), 2017) Prajith, K.K.; Remesan, M.P.; Madhu, V.R.; Pravin, P.
- ItemAssessment of Socio-economic status of Fishers across Different Sectors in Tamil Nadu(2017) Salim, Shyam S.; Narayanakumar, R; Sathiadhas, R; Antony, Bindu; Manjusha, UThe study found that the measures for improving literacy and health facilities created a positiveimpact on the livelihoods of the fisher community. The education and health standards are comparable with any other sector in the state providing ample opportunities for the upliftment of the fishers in the future. Over the years, due to the seasonality of the fishing operations and higher gestation period in culture sector, the fishers often diversified their income sources which include business, agriculture, labour, services and others. However due to increasing expenditure on account of maintaining the living standard, they are still engulfed in the vicious circle of poverty due to increased debt and lack of savings. Hence, appropriate measures need to be initiated to develop alternative avocations to improve income and standard of living.
- ItemBiochemical, sensory and textural quality of whole and gutted cultured milkfish (Chanos chanos) stored in ice(Society of Fishery Technologists (India), 2017) Murthy, L.N.; Padiyar, P.A.; Rao, B.M.; Asha, K.K.; Jesmi, D.; Phadke, G.G.; Prasad, M.M.; Ravishankar, C.N.Icing and ice storage of fish is widely used for transportation and marketing of fish. This paper reports on the biochemical, sensory and textural quality changes in ice stored whole and gutted cultured milkfish (Chanos chanos). Moisture content decreased and fat content increased with storage period in whole fish but it was reverse in gutted fish during the ice storage. Biochemical quality parameters showed an increasing trend during iced storage but increase was greater in gutted fish compared to whole fish. Overall acceptability of whole and gutted milkfish decreased significantly over the storage (p<0.05). Textural quality showed deterioration with progressive storage period.
- ItemPerformance Evaluation of Multi-seam Trawl in Inshore waters of Visakhapatanam, North East-coast of India(Society of Fisheries Technologist(India), 2017) Rajeswary, G.; Raghu Prakash, R.; Sreedhar, U.
- ItemDoes Rohu (Labeo rohita) (F. Hamilton, 1822) have different forms of Immunoglobulins?(Society of Fisheries Technologists (India),COCHIN, 2017) Suresh Babu, P.P; Shankar, K.M; Honnananda, B.R; Abhiman, P.BCharacterisation of immunoglobulin (Ig) is an essential prerequisite for development of anti- fish Ig antibody. There are number of reports describing the characteristics of rohu Ig which state the existence of different forms of antibodies in rohu. The present review is an attempt to compile these reports for analyzing the probable reason for the existence of such forms and the possible future research requirements for confirming the same.
- ItemCollagen Biosynthesis in Osteoblast Cells Treated with Fish Collagen Peptides(Society of Fisheries Technologists (India),COCHIN, 2017) Hema, G.S; Shyni, K; Prasad, M. Manu; Ninan, George; Mathew, SuseelaCollagen is one of the most widely used biomaterials in tissue engineering and regenerative medicine. To investigate the effect of fish collagen peptides on the formation of collagen proteins by mature osteoblast cells, human osteoblast cells were treated with collagen peptide in both time and dose dependent manner. The stimulatory effect of collagen peptide was confirmed by western blot and immunocytochemistry analysis. The results clearly indicate that the presence of fish collagen peptides led to a dose dependent increase in collagen synthesis by osteoblast cells upto a concentration of 0.6 mg ml-1. However native collagen or collagen free protein hydrolysate failed to stimulate the production of collagen in osteoblast cells. The results show a stimulatory effect of fish collagen peptides on the collagen biosynthesis in osteoblast cells and suggest a possible mechanism for the regulation of collagen turnover in joint tissues.
- ItemStructural, thermal and film forming properties of gelatin from pink perch surimi refiner discharge(Society of Fishery Technologists (India), 2017) Devi, H.M.; Balange, A.K.; Zynudheen, A.A.The objective of the present study was to characterize the gelatin obtained from pink perch (Nemipterus japonicus) surimi refiner discharge [referred as refiner discharge gelatin (RDG)] with reference to its structural, thermal and film forming ability. Fourier transform infrared (FTIR) and Differential Scanning Calorimetry (DSC) techniques were used to characterize the gelatin. An edible film was developed with different concentrations of RDG (2-6%) by casting method. FTIR analysis showed that the gelatin from refiner discharge has similar spectra with porcine gelatin (PG). The amide I and amide II bands of RDG occurred at around 1654 and 1578 cm-1 respectively. RDG has a broad endothermic peak at 85.64oC with transition enthalpy (ΔH) of 208.02 J g-1 as revealed by thermal analysis indicating the thermal transition temperature and the energy required for the transition respectively. RDG showed good film forming property. The gelatin concentration had strong significant (p<0.05) effect on the viscosity of film forming solution. Films were more opaque at higher concentration of gelatin compared to the films prepared at lower concentration. Higher L* values were observed for all the films prepared and there were no significant differences among the gelatin concentrations. Tensile strength of the film increased with increasing gelatin concentration whereas the film swelling was found to be decreased. The study clearly demonstrated that the waste from the surimi processing industries like refiner discharge can be an alternative raw material for gelatin production and can be used for edible packaging films development.