FT Vol.37(1)

Permanent URI for this collection

http://localhost:4000/handle/123456789/5399

Browse

Browsing FT Vol.37(1) by Title

Now showing 1 - 14 of 14
  • Item
    Bacterial Flora of the Intestines of Farm Raised Freshwater Fishes Catla catla, Labeo rohita and Ctenopharyngodon idella
    (Society of Fisheries Technologists (India)Cochin, 2000) Hatha, A;A.M; Kuruvilla, Seena; Cheriyan, Synobia
    Bacterial flora associated with the intestines of farm raised freshwater fishes such as Labeo rohita, Catla catla and Ctenophan/ngodon idella have been analysed. The mean population of total heterotrophic bacteria (THB) of the intestine of L. rohita was 3.2xl06 colony forming units (CFU) per gram and that of C. catla and C. idella were 4.79x10'' and 1.13xl07 CFU respectively. Morphological and physiological grouping of the isolates revealed dominance of gram negative rod shaped bacteria capable of elaborating various hydrolytic enzymes such as amylase, lipase and gelatinase. Ureolytic forms were relatively few. Characterisation of the genera revealed the dominance of Aeromonas in the intestine of these fishes. Other genera encountered were Corynebacterium, Micrococcus, Alcaligenes, Vibrio, Moraxella, Bacillus, Lactobacillus, Acinetobacter, Flavobacterium and members of the family Enterobacteriaceae.
  • Item
    Biochemical investigations on Antarctic krill Euphausia superba
    (Society of Fisheries Technologists (India), 2000) Ragunath, M.R.; Sankar, T.V.; Radhakrishnan, A.G.; Mathew, S.; Ammu, K.
    Antarctic krill (Euphausia superba Dana), caught by the first Indian krill expedition was processed on board into whole krill, peeled tail meat and whole krill mince. These were analysed for trace metals, lipids, cholesterol, fatty acids and amino acids. Autolysis at various pH and temperatures as well as thermal coagulation of krill mince suspended in various media were also studied. Trace metals were below toxic levels while no pesticides were detected. Krill tail meat had small amount of lipids and cholesterol (0.81 and 0.033% respectively). The lipids were rich in C18:1, C20:5, C22:6, fatty acids. Autolytic activity at pH 3-4 and 8-10 was predominant in whole krill at 20 and 40 degree C but autolysis in tail meat was very low. Nearly 80% of the soluble proteins in krill suspension could be precipitated by rapid heating.
  • Item
    Characteristics of gel from the meat of twelve species of fish from Visakapatanam coast
    (Society of Fisheries Technologists (India), 2000) Chakrabarti, R.; Gupta, S.S.
    Proximate composition and gel formation capacity of the meat from twelve low priced fish of Visakhapatnam coast were studied. It was found that the mince from these fish, on steaming formed gel having satisfactory strength. Gel strength of meat samples from fresh fish varied from 450 to -500 gcm. The colour of the steamed cake from jew fish, bull's eye, barracuda and lizard fish was white and it varied from light grey or yellow to grey in the case of goat fish, sardine, rainbow sardine, thread fin trevelly, horse mackerel, cat fish and scad. The fish mince from all the twelve species can be used for preparation of various products.
  • Item
    Comparative Microbial Ecology of Fresh Water and Brackish Water Prawn Farms
    (Society of Fisheries Technologists (India), 2000) Surendran, P.K.; Thampuran, N.; Nambiar, V.N.
    Microbiological characteristics of fresh and brackish water prawn farms along with their physico-chemical parameters have been investigated. Even though water quality was within the accepted limits in the two farms, there were appreciable variations between the two in respect of pH and dissolved oxygen. Total bacterial counts of the water, mud and the cultured prawn from fresh water farm registered lower values, compared with those from the brackish water farm. However indicater bacteria like total coliforms and faecal coliforms were high in number in the fresh water farm. Human pathogenic bacteria like Salmonella Enteropathogenic E. coli O157:H7, Listeria monocytogenes, Vibrio cholerae, Aeromonas Enterotoxigenic Bacillus cereus, Plessiomonas shigelloides and other pathogenic Vibrios were also monitored in respect of two types of farm environments. Antibiotic resistance pattern of the bacterial cultures from the two farms towards seven commonly used antibiotics showed comparable values.
  • Item
    Composite Farming of the Green Mussel, Perna viridis with the Shrimp Penaeus monodon along the Okhamandal Coast of Arabian Sea in Gujarat
    (Society of Fisheries Technologists (India)Cochin, 2000) Subrahmanyam, N; Gopalakrishanan, P
    The results of an onshore raft-cum-rope culture experiment of green mussel, Perna viridis with shrimp, Penaeus monodon in a shallow sea water pond system are reported. The seed of P. viridis measuring an average of 21.2 mm in length and 1.2 g in weight attained an average of 68.5 mm in length and 24.2 g shell on weight in 150 days of culture. The harvested mussel had a meat content of 32.66%. The results, when compared with the reported data in open sea farming from other parts of the country, were found to be highly encouraging
  • Item
    Destruction of Surface-Inoculated Escherichia coli, Vibrio cholerae and Salmonella typhi in Rohu (Labeo rohita) Steaks during Microwave Cooking
    (Society of Fisheries Technologists (India)Cochin, 2000) Muzaddadi, A.U; Nayak, B.B
    The destruction of bacteria during microwave cooking of fish was studied. Fish steaks were surface-inoculated with Esclierichia coli, Vibrio cholerae and Salmonella typhi and cooked in a microwave oven. The bacteria were enumerated by plating on selective and non selective media and by MPN technique. The vegetative cells of S. typhi and V. cholerae were totally destroyed from an initial count of 107 cfu/g to a non detectable level and E. coli was destroyed from an initial count of 107 cfu/g to 1 cfu/lOg after microwave treatment. Cooking for a longer duration at low power output level was found to ensure the killing of pathogens and minimize bumping without any distortion of shape.
  • Item
    Effect of Petroleum Hydrocarbon on Physiological and Biochemical Parameters in an Estuarine Clam, Paphia malabarica
    (Society of Fisheries Technologists (India)Cochin, 2000) Modassir, Yasmin; Ansari, Azra
    Commercial grade diesel oil was used as a source of petroleum hydrocarbon to study the toxic effect of petroleum hydrocarbons on physiological and biochemical parameters in an estuarine bivalve, Pnpliin malabarica. The results of the investigation revealed the adverse effect of diesel oil on the growth condition index and biochemical constituents. The growth was affected resulting in reduction of about 30% in the average growth rate after 30 davs. The impact was more with higher concentration. There was reduction in the values of organic carbon and nitrogen. The biochemical constituents such as protein and carbohydrate also showed slight decline while the lipid content increased marginally. The results suggest that exposure to petroleum hydrocarbon may be deleterious to manv marine and estuarine organisms and may change the physiological and biochemical processes, depending on its bioavailability and exposure concentration.
  • Item
    Effects of creosote and copper-chrome-arsenic (CCA) treatment on the compressive strength of haldu wood (adina cardifolia benth & hook)
    (Society of Fisheries Technologis(India), 2000) Leela Edwin; Thomas, S.N.
    The effect of preservative treatment on a secondary species of wood, Adina cordifolia (Haldu) was studied. Panels were impregnated with creosote, an oil borne preservative, and copper-chrome- arsenic (CCA), a water borne preservative, through immersion treatment. The compressive stress parallel to grain of panels at various preservative retention levels was assessed to find out the change in mechanical strength. An average reduction of 14% compressive stress was noticed in CCA treated haldu panels and slight increase of 2 - 6% was observed in creosote treated panels.
  • Item
    Incidence of pathogenic halophilic vibios in frozen fish products
    (Society of Fisheries Technologis(India), 2000) Sanjeev, S.; Varma, P.R.G.; Iyer, T.S.G.
    Three hundred and eighty two samples consisting of iced and frozen fish products were collected from 23 processing factories situated in Kerala and Tamil Nadu for studying the incidence of pathogenic halophilic Vibrios. Halophilic Vibrios were isolated from 193 samples (50.52%). 171 samples (44.76%) were found to be the carriers of pathogenic halophilic Vibrios. Nine species of pathogenic halophilic Vibrios and nine species of non-pathogenic halophilic Vibrios were isolated from these samples. Among pathogenic organisms, Vibrio cincinnatiensis was found to be the dominant species (18.06%) followed by Vibrio alginolyticus (15.18%), Vibrio parahaemolyticus (9.42%), Vibrio vulnificus (5.24%) etc. Vibrio harveyi was the major species among non-pathogenic halophilic Vibrios (12.30%).
  • Item
    Inter-relationship Between Condition Coefficient (K) of Penaeus monodon and Heavy Metals from a Brackish Water Pond
    (Society of Fisheries Technologists (India)Cochin, 2000) Mitra, A; Mandal, T; Jamaddar, Y.A; Bhattacharyya, D.P
    The condition coefficient (K) of Penaeus monodon, collected from a traditional brackish water system at Kanmari, about 50 km away from the city of Calcutta, during the period from March 1992 to February 1994, was estimated. During the investigation period, concentrations of heavy metals (Zn, Cu, Mn, Fe, Cr, Ni, Pb and Cd) in the ambient media (sediment and water) were determined to study the suitability of the environment for the growth and survival of the species. There was a negative correlation between the condition coefficient and the concentration of heavy metals in water.
  • Item
    Quality changes in whale shark (Rhiniodon typus Smith) meat during storage in ice.
    (Society of Fisheries Technologists (India), 2000) Kumar, K.A.; Ravishankar, C.N.; Badonia, R.; Solanki, K.K.
    The biochemical, bacteriological and organoleptic changes in whale shark (Rhiniodon typus Smith) meat during storage in ice have been studied. There was a decrease in the proportion of soluble fractions of protein during storage. It was observed that the meat could be stored in ice up to 12 days in acceptable condition.
  • Item
    Sodium Acetate and Vacuum Packaging to Improve Shelf Life of Refrigerated Lethrinus lentjan Fillets
    (Society of Fisheries Technologists (India)Cochin, 2000) Shalini, R; Jasmine, G. Indra; Shanmugam, S.A; Ramkumar, K
    The shelf life of vncuum packed fresh Lethrinus lentjan fillets, untreated or treated with various levels of sodium acetate, was evaluated. The quality was assessed periodically by selected biochemical, microbiological and sensory characteristics. The shelf life of product packed without vacuum and untreated vacuum-packed fillets was around 7-8 days whereas sodium acetate treated fillets had shelf life of 2-3 weeks. Reduced rate of bacterial growth, decreased rate of production of TMA-N and TVB-N and delayed development of off odours were observed in sodium acetate treated, vacuum packed fillets
  • Item
    Technology induced productivity in fisheries
    (Society of Fisheries Technologists (India), Cochin, 2000) Gopal, N.; Menon, S.J.; Annamalai, V.
    Artisanal fisheries in Cochin are characterised by the presence of three types of craft operations (large motorised crafts, small motorised crafts and non-motorised crafts) representing three different technological gradations. The study investigated the technological gradations vis-a-vis capital and labour productivity. It was observed that more sophisticated the technology, higher are the costs as well as gross returns. Though every increase in capital was accompanied by an increase in labour, capital increase per labour was not proportinate, i.e. increase in capital is more than increase in labour, showing a labour saving character in the process of technological sophistication. In terms of productivity, capital productivity declines as capital intensity increases. Optimum use of capital in terms of productivity does not occur in fish harvest technologies.
  • Item
    Water-Stability of Pelleted Fish Feeds Prepared from Non-Conventional Sources
    (Society of Fisheries Technologists (India)Cochin, 2000) Jayadev, W; Vishwanath, W
    Fish feed was formulated using easily available low cost material as protein source and the water stability of the formulated feed was tested. It was found that feeds with higher fat content had better stability in water