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  • 1
    Publication Date: 2015-09-29
    Description: The distribution and landings of important varieties of prawns off Paradeep coast, Orissa, in relation to the climatic and hydrographic conditions from 1970-1976 are presented. The prawn fishery as a whole, showed a quadrennial cycle along the coast. The post-monsoon migration of all varieties of prawns along the coast directly depends on the annual precipitation. Temperature gradient, fluctuations in salinity and southerly wind in the Bay of Bengal influence the migration of the different species of prawns.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
    Format: application/pdf
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  • 2
    Publication Date: 2015-10-13
    Description: Experiments with drift gill net with under-water lights were carried out in the sea and estuarine region along with a control net of the same specifications without any light in the same fishing ground for comparison. The experimental net caught more fish in number and weight than the control. Fishes like pomfrets (Pampus chinensis, Parastromafeus niger), seer (Scomberomorus spp), hilsa (Ilisha spp) etc showed positive phototaxis and were gilled encircling the point of illumination. Young skates (Mobula spp) and Polynemus tetradactylus were antiphototactic. The number of fishes caught increased with increase in period of illumination. The catch of larger fishes was maximum at 60 mts of illumination and the total catch increased with increase in intensity of light. Additional cost of operation with under-water light was Rs 1-25 per hr but the catch was 4 to 5 times greater than that of the control net.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 3
    Publication Date: 2015-10-13
    Description: The threshold current densities and voltage tensions (body voltages) between the head and tail for bringing about distinct reactions in Salmo irideus, Cyprinus Carpio, Tinea tinca, Gasterosteus aculeatus and Salmo fario were studied. In C. carpio and T. tinca, absolute current densities required decreased with increase in length of fish. Threshold current densities for different reactions of fish increased with rise in water temperature and conductivity of surrounding medium except in case of T. tinca where low current densities were sufficient in higher conductivity of water. Impulse D.C. was superior to continuous D.C. Better effect was noticed in fishes in lower current densities when their bodies were parallel to the lines of current conduction.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 4
    Publication Date: 2015-10-18
    Description: A comparative study on the effect of A.C. field on Puntius ticto, Heteropneustis fossilis and Tilapta mossambica was carried out using a slowly rising field intensity. Well defined reactions appeared in the species of fish with slight specific variations, depending on their orientation in the electrical field, on reaching the field intensity to specific value. These reactions can be distinguished as first reaction, when the fish perceive the surrounding field, jerky swimming when parallel to the current lines (longitudinal oscillotaxis), the static position finally adopted by the fish sooner or latter depending on the potential gradient (transverse oscillotaxis), and a state of muscular rigidity (tetanus). After switching off the current, a hypnotic condition prevailed in the treated fishes before returning to their normal swimming condition. The orientation of fish body in the field had an important bearing on the behaviour reactions and current thresholds necessary for those reactions. Initial reaction, jerky swimming between electrodes and hypnosis after stoppage of current appeared in fishes earlier when the fish body was in parallel to the current lines, whereas fishes responded to transverse oscillotaxis quickly when perpendicular to current lines.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 5
    Publication Date: 2015-10-21
    Description: Response to external electric field (D. C.) of three different varieties of fish namely Puntius ticto, Heteropneustis fossilis and Tilapia mossambica having different anatomical and behavioural characteristics were studied. Clearly distinguished reactions occurred one after another m all the varieties of fish with the increase in field intensity with minor specific variations. These reactions can be broadly classified into initial start (first reaction), forced swimming (galvanotaxis), slackening of body muscle (galvanonarcosis) and state of muscular rigidity (tetanus). The orientation of the organism (projection of nervous element) to the surrounding field has been found to have important bearing on the behaviour reactions. Clearly differentiated anodic taxis and true narcosis set in when fish body axis was parallel to the lines of current conduction. But with greater angle between the body axis and the current lines, fish did not show well marked reactions. Fish body, when perpendicular to current lines responded for anodic curvature and off balance swimming followed by tetanus.
    Keywords: Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 6
    Publication Date: 2016-01-27
    Description: The book is written by Mariarosa Dalla Costa and Monica Chilese; translated by Silvia Federici; Common Notions; NY.2014. It is a vigorous critique of where globalization and industrialization in fishing have led global water resources to, and the direct role that humankind has played in this destructive relationship.
    Keywords: Fisheries ; Sociology
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 7
    Publication Date: 2017-11-14
    Description: This booklet, authored by John Kurien and published by the Food and Agriculture Organization (FAO) of the United Nations, brings together important insights on community empowerment in the traditional fisheries in Cambodia gleaned through field work and consultations undertaken between 2012 and 2015.
    Keywords: Fisheries ; Sociology
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 8
    Publication Date: 2018-09-11
    Description: Sex-segregated employment data in the recently released State of World Fisheries and Aquaculture 2018 report points to the need for better and more standardised data collection.
    Keywords: Fisheries ; Sociology
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 9
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    Publication Date: 2018-10-11
    Description: In June this year, the city of St. John’s in Newfoundland and Labrador, Canada, played host to the largest gathering of fishing, aquaculture and seafood-processing safety and health professionals: the Fifth International Fishing Industry Safety and Health Conference (IFISH 5), the only conference dedicated to improving safety and health in the fishing industry. Held from 10 to 13 June 2018 in the picturesque campus of St. John’s Memorial University, and blessed – contrary to gloomy weather forecasts – by a few days of unexpected sunshine between rainy ones, IFISH 5 explored the latest research on occupational safety and health; discussed current fisheries policy and regulations; and showcased best practices for keeping workers safe and healthy.
    Keywords: Environment ; Fisheries
    Repository Name: Aquatic Commons
    Type: Article , NonPeerReviewed
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  • 10
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    International Collective in Support of Fishworkers
    Publication Date: 2011-09-29
    Description: pdf has 46p.
    Keywords: Fisheries ; Sociology
    Repository Name: Aquatic Commons
    Type: Monograph or Serial Issue , NonPeerReviewed
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