995 resultados para Hohenzollern, Joachim von (1890-1920) -- Portraits
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Digital Image
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This is the first of three books about the history of Geoffrey Lynfield's family. It is about four Lilienfeld brothers--Geoffrey Lynfield's grandfather and his brothers. They were born in the Jewish enclave of Marburg and ended up in South Africa when and where the first diamonds were discovered. The manuscript also includes photographs and documents.
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A brochure, listing all members of the order, 1842-1983. A typescript adds members until 1985 and lists Jewish members, 1842-1981.
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The pressure of users other than shipping and fishery on the national EEZs for territorial claims has increased in recent years. So it becomes necessary to carry out a spatial planning for which all users have to indicate their recent and planned future activities. For the German waters in the North Sea a first attempt was made to calculate the mean international landings for the commercially important fish and crustacean species on the spatial scale of ICES-rectangles. The relationships between the German and international landings per species are listed in a table and the distribution of the landings for each species within the area are shown in 13 figures.
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Age reading by use of otoliths is one of the basic but also most essential elements in practical fish population dynamics. Unfortunately, many factors can influence the readings of a single reader. Erronous readings, however, have a consequential effect on the evaluation and prediction of the development of the fish stock under consideration. In order to master this problem and to reduce out the effect of those factors, it seems neccessary to standardize the whole process of age reading between collaborating readers. From a statistical point of view calibration techniques can be used to identify those factors and to correct the readings with respect to them. The current article presents an overview over the basic idea behind this, over how to balance out the existing deviations and how to correct the age readings.
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Recently, the German redfish fishery displayed a pronounced seasonal pattern in geographic effort distribution and depth. The second and third quarters were the main season when 80 % of the effort was exerted. During the second quarter, the fleet activities were concentrated in international waters close to the Icelandic Exclusive Economic Zone (EEZ), fishing at depths exceeding 600 m. In contrast, the catches in the third quarter were taken mainly inside the Greenland EEZ at depths around 300 m. From 1995 to 1998, the annual effort ranged from 14 000 to 18 000 trawling hours, without a trend. This effort yielded about 18 000 to 21 000 t (international catch > 100 000 t) annually. Since 1996, the catch rate (CPUE) decreased during the main season. The decrease in CPUE should be interpreted as the first reaction of the stock to increased exploitation. The fish size also varied seasonally and peaked during the second quarter at depths exceeding 600 m. Here, males were bigger than females and both sexes were equally frequent. The increase of fish size with increasing depth did not contribute to the hypothesis of two separate pelagic redfish stocks above and below 500 m. In contrast, the close relation between fish size and depth point to the so-called “deeper-bigger phenomenon” which was found in numerous fish stocks. Very few redfish in the catches were immature.
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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em História Contemporânea
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Référence bibliographique : Rol, 58466
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Référence bibliographique : Rol, 58467
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Référence bibliographique : Rol, 58363
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Référence bibliographique : Rol, 58364
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Référence bibliographique : Rol, 58365
