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  • Fisheries
  • Industrial Chemistry
  • Inorganic Chemistry
  • Meteorology and Climatology
  • Seismology
  • Academic Press  (3)
  • Woods Hole Oceanographic Institution  (3)
  • INP (Ecuador)  (2)
  • 2005-2009  (6)
  • 1955-1959  (2)
  • 1950-1954
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Years
Year
  • 1
    Publication Date: 2021-05-19
    Description: El presente trabajo llama la atención a las recientes epidemias de intoxicación histamínicas reportadas en los Estados Unidos, debido al consumo del dorado (Coryphaena hippurus) o Mahi-Mah, contaminado. Esto dió como resultado la prohición de las importaciones de esta especie, proveniente de varios países entre ellos el Ecuador, y siendo el dorado una especie de relativa importancia económica en este país, dicha prohibición ha preocupado al sector pesquero. Los estudios llevados a cabo muestran claramente la susceptibilidad de esta especie a desarrollar histamina. Esto se debe principalmente a la temperatura a la que está expuesta, pues la demora antes de enhielar el pescado es la etapa crítica. Los resultados muestran un aumento exponencial de los niveles de histamina, en ciertos casos después de tan solo 9 horas de almacenaje a temperaturas ambientales entre 25-30°C. Los niveles de histamina en pescado muestreado en el mercado local fueron tan altos como 250 mg/100g de muestra. Se demuestra que el problema se debe fundamentalmente al mal manejo de la captura por parte de la flota artesanal, y la subsecuente falta de infraestructura adecuada para conservarla, es decir, no se enfría el pescado. Sin embargo, el estudio muestra que una reducción de la temperatura del pescado de solo 15° menos, podría dar como resultado un producto de mayor calidad. En el presente trabajo se hacen recomendaciones para establecer un nivel máximo permitido para la exportación de 10 mg%, y se comparan dos métodos rápidos de análisis.
    Description: Published
    Keywords: Fisheries ; Histamines ; Quality control ; Fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
    Publication Date: 2021-05-19
    Description: 153 experimental sets were made with stackable Antillean fish traps in depths of 5 to 30 m in the waters around the Galápagos Island (Ecuador), between Octobre and April 1983. 1,885 fish were caught of 18 species mainly of the families Pomadasyidae, Acanthuridae, Sparidae and Serranidae. The mean catch rate was 5,5 Kg per lift or 0,4 Kg.h-1, and the mean weight of the fish caught was 0,45 Kg. The optimum set duration was found to be between 2 and 18 hours (possibly indicating a high rate of escape). This study took place during the period of the ”El Niño”, when catches of fish in this area generally were low, and it is not known what effect this had. The catches were good compared with other shallow areas, but the fishes caught were mainly of medium quality. It is thought that significant increases in the quantity and quality of the catch could be obtained with commercial traps in deeper areas, but the efficient use of these would require new vessels and equipment, and the resulting increase in fishing effort could lead to overfishing of the most acceptable species of reef fish. Hence the development of fishery using fish traps is not recommended for Galápagos. A study of the biology of the fish caught was carried out. A bibliography of references on fish traps and their use was compiled and is included.
    Description: Published
    Keywords: Fisheries ; Trap fishing ; Fisheries ; Catch statistics ; Trap fishing
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
    Publication Date: 2022-05-25
    Description: This report describes a preliminary analysis of borehole seismic data to determine VLF/Sub-bottom Seismic Noise in the Atlantic and the preliminary results of finite difference modelling for a Cape Fear environment. Noise levels were not a simple function of depth and there are indications that noise levels may depend on local geology about a given receiver position and/or on clamping. Coherency of the noise was generally poor (〈0.8) and was independent of depth. There is no evidence for distinct polarizations or directionality of the noise. The lowest determined value for ambient noise power on the vertical component was 10-4 nm2/Hz in the frequency range from 5-50 Hz. The better clamped horizontal component had comparable power values. In conclusion, although the drill ship was on the site and drill pipe was in the hole, analysis of the data for a large number of windows can provide meaningful upper bounds on the ambient noise levels in the upper crust.
    Description: Prepared for the Naval Ocean Research and Development Activity as the final report for Contract Purchase Order No. N62306-86-l4-7589
    Keywords: Ambient sounds ; Seismology
    Repository Name: Woods Hole Open Access Server
    Type: Working Paper
    Format: application/pdf
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  • 4
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-25
    Description: The first year of the New England Regional Fisheries Management Council has been marked by its experimental aura. Neither the Council nor the various sectors (representatives of the Federal and State agencies, members of the fishing industry, the public at large) were clear as to exactly what they were to do and how they were to do it--except in the broadest, most flexible (ambiguous?) terms. This created certain operational difficulties, and confusion for those whose livelihood was affected by the Council's operation. This latter group, particularly the fishermen, knew little of what went on, save in terms of the 'public facet of the Council--i.e., that portion of the Council's performance which occurred during the monthly meetings which were open to the public and which, supposedly, received public input at that time. This study defines that public face, deliberately avoiding the presentation of any data which was not accessible to the average audience participant, in an attempt to present some of the behavior which all participants demonstrated and which generated responses and reactions on the part of the other sectors. It uses standard anthropological techniques of data gathering and analysis to show the degree to which impression management on the part of all the actors operated in a systematic fashion to produce action, reaction, and counter-action. Particularly emphasized is the communication aspects.
    Description: Prepared with funds from the Pew Memorial Trust and by the Department of Commerce, NOAA Office of Sea Grant under Grant #04-7-158-44104, and the Marine Policy and Ocean Management Program of the Woods Hole Oceanographic Institution; and by sabbatical funding from the State University of New York.
    Keywords: Legislation ; Fisheries ; Sociocultural analysis
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
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  • 5
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: Fish and fishermen appear to be in a serious decline in New England. The haddock are overfished, inshore herring stocks are depleted, yellowtail flounder and lobster are scarce. The popular image is of grizzled fishermen, their boats chipped, scarred, old-fashioned hulks of wood tied up two and three abreast along the rotting wharves and piers of New England's depressed port towns. In this research project, we wanted to determine the state of the New England fishing industry and to propose acceptable methods for the management of the fishery. During our early discussions with the fishing industry people, we mentioned that we were interested in limited effort programs as they might be applied to New England fishermen. We carefully, and probably tediously, explained the "theory of limited effort" and we were generally thought to be daft. We were told we had things backwards--that the fishing industry needed more fish, more men, more boats - and that the way to accomplish this was to get a 200-mile fishing limit and kick the foreigners out. One of these wishes has come true - in the spring of 1976, P.L. 94-265 established a 200-mile fishing zone off the United States, with regional management councils to make management plans and allocate the resources first to United States fishermen, with surpluses to foreign fishermen.
    Description: Prepared with funds from the Pew Memorial Trust and by the Department of Commerce, NOAA Office of Sea Grant under Grant #04-5-158-8 and Grant #04-6-158-44106, and the Institution's Marine Policy and Ocean Management Program.
    Keywords: Fisheries ; Management
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
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  • 6
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    Academic Press
    In:  Tulsa, Oklahoma, 2nd edition with CD-ROM, Academic Press, vol. 27, pp. 6322, (Hardbound, ISBN: 0-12-065604-3, 320 pp.)
    Publication Date: 2005
    Description: Contents: Preface 1. Introduction 2. Linear Regression 3. Discretizing Continuous Inverse Problems 4. Rank Deficiency and Ill-Conditioning 5. Tikhonov Regularization 6. Iterative Methods 7. Other Regularization Techniques 8. Fourier Techniques 9. Nonlinear Regression 10. Nonlinear Inverse Problems 11. Bayesian Methods Appendix A: Review of Linear Algebra Appendix B: Review of Probability and Statistics Appendix C: Glossary of Notation; Bibliography; Index It is accompanied by a Web site that contains Matlab code corresponding to all examples. Audience: Students and professionals in Astrophysics, Applied Mathematics, Atmospheric Science, Geologiocal Engineering, Geophysics, Hydrology, Oceanography and related fields.
    Keywords: Textbook of geophysics ; Textbook of engineering ; Inversion ; Non-linear effects ; Statistical investigations ; Data analysis / ~ processing ; Error analysis ; Seismology ; Location
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  • 7
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    Academic Press
    In:  New York, 12 + 240 pp., Academic Press, vol. 7, no. XVI:, pp. 385-389, (ISBN 0-12-305355-2)
    Publication Date: 1959
    Keywords: Textbook of geophysics ; Seismology ; Earth model, also for more shallow analyses !
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  • 8
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    Academic Press
    In:  Advances in Geophysics, New York, Academic Press, vol. 5, no. 6, pp. 53-92, pp. L24306, (ISBN: 0534351875, 2nd edition)
    Publication Date: 1958
    Keywords: Micro seismicity ; Seismology ; NOISE
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