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    In:  http://aquaticcommons.org/id/eprint/16151 | 12051 | 2015-02-08 09:34:41 | 16151 | Society of Fisheries Technologists, India
    Publication Date: 2021-06-29
    Description: Papers dealing with technical terms in fisheries science are few. This paper however, covers only one or two aspects of the subject, namely fishing gear materials and fishing gear fabrication. Similar papers on other aspects are also planned. Short explanations or descriptions are also given wherever considered necessary.
    Keywords: Fisheries ; glossaries ; terminology ; fishing gear materials ; fishing gear fabrication
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 5-36
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  • 3
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The levels of Pb-214 (Ra-B) and Pb-212 (Th-B) in surface air at two coastal stations (Bombay and Thumba) and at a third high-altitude station (Gulmarg) in India are presented. A seasonal variation in activity at the coastal stations with winter maximum and summer minimum and the absence of a similar variation at the high-altitude station at Gulmarg is discussed. From a study of the relevant meteorological data, it is concluded that at the coastal stations, the major factor influencing the activity levels is likely to be the stability of the lower atmosphere, advective effects possibly playing a secondary role. At Gulmarg, however, factors affecting emanation from the soil, like rainfall, snowfall, etc., could be significant.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 122 (1984), S. 124-132 
    ISSN: 1420-9136
    Keywords: Monsoon ; Radon ; MONEX ; Equator ; Arabian Sea ; Indian ocean ; Interhemispheric mixing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Radon-222 activity levels have been measured at deck level in regions of the Arabian Sea, Indian Ocean, and Bay of Bengal during the summer monsoon periods of 1973, 1977, and 1979, as part of the Monex programme. The aim of the measurements was to find the source regions of the monsoon air and the variations in its composition under different synoptic conditions. The radon data confirm that the monsoon air is predominantly of southern-hemisphere origin, with a small continental component. The continental component, as indicated by radon values, increases at higher latitudes and seems to vary with different circulation patterns in the synoptic scale. The use of radon as a tracer in monsoon studies is thus demonstrated.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1420-9136
    Keywords: Atmospheric radioactivity ; Least square analysis ; Radon daughters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The application of the weighted and unweighted least-squares method to the analysis of the individual concentrations of short-lived radon daughters in the open atmosphere, where, unlike in the mines the levels are low, is discussed. The method can be optimized to give minimum counting errors by proper choice of collection times and counting periods. By analysing a large number of samples it is shown that the least squares method gives better accuracy than the simultaneous equations method generally in use. The calculation can be simplified by using the unweighted least-squares analysis without significant loss in accuracy. The levels of RaA, RaB and RaC in surface air at Bombay during the period January-June 1975, calculated using the least-square method, are presented. The activity ratios of RaC/RaB are shown to have an average value around 0.6–0.9 even at 18 m height. The RaB/RaA activity ratios however show a much larger scatter than the RaC/RaB values. The possible reasons for these differences are discussed. The application of the least-squares method to the analysis of Th-B and Th-C is also described.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 100 (1989), S. 223-226 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In vertebrates haematological parameters are of considerable importance in the diagnosis of pathological disorders due to pollutants. Similar haematological studies in invertebrates are lacking. This is partly because a very few species have erythrocytes; arcid clams, however, are unique in having erythrocytes. Our experiments were designed therefore to evaluate the effect of naphthalene (N) on haematological parameters in the tropical arcid blood clam Anadara granosa L. The parameter studied were haemoglobin (Hb), erythrocyte sedimentation rate (ESR), haematocrit, erythrocyte fragility, haemolymph cations, free amino acids and osmolality. On exposure to naphthalene (N) in the sublethal range (5 to 15 μg ml-1) Hb content decreased appreciably (P〈0.001) compared with controls. Although ESR increased significantly (P〈0.001), haematocrit decreased by 17 to 37%. Treatment with N for 96 h increased erythrocyte fragility and haemolysis; the latter by more than 40%. Both inorganic phosphate and free fatty acids increased with ambient concentration of N. Haemolymph cations — K, Ca and Mg increased significantly in relation to control. Na decreased, but not significantly. Free amino acids decreased significantly (P〈0.001) with the ambient concentration of naphthalene, but haemolymph osmolality was not effected.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 103 (1989), S. 203-209 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Exposure of the tropical arcid blood clam Anadara granosa L., collected from Bombay waters in 1986, to sublethal concentrations of naphthalene (Nap) (5, 10 and 15μg Nap ml-1), induced various changes in vital biochemical systems. The condition index (CI) remained largely within the control range, although tissue water content after 96h exposure increased significantly (p〈0.001). Glycogen levels appreciably decreased, both in muscles (p〈0.001) and digestive glands (p〈0.01). AMP activity remained unaltered irrespective of the ambient Nap concentration. ADP levels decreased by more than 20% and ATP levels also decreased significantly (p≪0.001) by more than 60% with increases in ambient Nap levels from 5 to 15 μg ml-1. Lysosomal marker enzymes-arylsulphatase and acid phosphatase-showed various changes. Levels of the former were 10 to 17 times higher than the latter. Total and free arylsulphatase activity in hepatic cells decreased on exposure of clams to 5 and 10μg Nap ml-1, but not significantly. However, it was significantly inhibited (p〈0.001) towards the upper limits of exposure concentration. The same was also true of acid phosphatase activity. Nicotinamide adenine dinucleotide (NADH2) oxidation of lipochrome showed a dramatic decrease in activity in the range of 37 to 88% over controls with increasing Nap from 5 to 15 μg ml-1. Fatty acids also exhibited significant changes in composition with a decrease in polyunsaturated acids and an increase in certain saturated fatty acids. Protein and carbohydrate levels increased significantly (p〈0.001) towards upper limits of exposure concentration. Pyruvic acid levels increased significantly by 2 to 6 times over controls on exposure to 5 to 15 μg Nap ml-1. Explanation of these changes is attempted in terms of the glycolysis pathway involving pyruvic acid oxidation and oxidative phosphorylation in the electron transport system.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 103 (1989), S. 193-202 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in vital physiological activities — shell movements and burrowing behaviour, uptake and depuration, filtration and respiration — on exposure to sublethal concentrations of naphthalene (Nap) were investigated in the tropical arcid blood clam Anadara granosa L. from the Bombay coast in 1986. On exposure to ambient concentrations exceeding 5μg Nap ml-1, shell valves opened widely within the first hour of exposure. The compressed muscular foot was stretched vertically upwards with copious secretion of mucus, and did not exhibit any evidence of burrowing behaviour. Those exposed to 5μg Nap ml-1 regained their normal physiological activities on transfer to stressor-free medium, whereas those exposed to higher levels became intoxicated and narcotized. Bioaccumulation of Nap was dependent upon environmental concentration, increasing exponentially with time over a 9h exposure period. Further exposure, up to 96h, however, did not increase tissue levels substantially. About 65% of the total body burden of Nap was depurated within 3h of transfer to Nap-free medium. Rates of filtration and oxygen consumption were significantly reduced (ca 70%, p〈0.001) compared to control clams. Percent inhibition in these physiological activities was dependent upon tissue and ambient concentrations of Nap. On transfer to pollutant-free medium, clams exhibited remarkable recovery. Rates of both filtration and oxygen consumption were gradually increased and restored to normal levels, as observed in controls. However, clams exposed to upper limits lost their ability to burrow back into the sedimentary bed, leaving them susceptable to predators. Furthermore, induction of anaerobiosis and disruption of osmotic balance on exposure to Nap together with aerial exposure at low-water periods and salinity changes, acted synergistically and proved detrimental. The rates of growth and mortality observed in the natural population of blood clams, harvested from the coastal waters off Bombay, have been explained in terms of the impact of petroleum and allied waste products released from petrochemical industries.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 60 (1998), S. 168-170 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 59-60 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The enzyme material used was an aqueous extract of ether-defatted brown and yellow adipose tissue prepared in the following manner. After decapitation, the subcutaneous interscapular brown adipose tissue and the yellow adipose tissue from the lower lateral sides of the abdomen were carefully ...
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