991 resultados para 1970


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This is the 5th Annual Report of the Rive Exe Scale Reading Investigation for the 1970 season by the Devon River Authority. The object of this investigation is to examine, by means of scale reading, the biology of age classes of the salmon population of the River Exe. It reviews the methods used for the collection of scales and examination of the materials. It shows the results of the survey and the number of scales studied from each of the various sea-age classes, time of running with distribution of the sea-age groups throughout the season, fish sizes and smolt ages at migration. All is summarized in tables, and figures are included showing weight distributions for each age classes and frequency distributions.

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Este trabalho é uma investigação da história do papel-moeda brasileiro, do cruzeiro de 1970 ao real de 2010, do ponto de vista do Design Gráfico, considerando as dimensões histórica, tecnológica e política do objeto dinheiro impresso. Foram levantados dados de diferentes fontes, como bibliografia especializada, documentos da Casa da Moeda do Brasil e do Banco Central, bem como entrevistas com profissionais envolvidos nos projetos de papel-moeda brasileiro no período de 1970 a 2010. O estudo aponta para uma crescente nacionalização do processo de projeto gráfico do papel-moeda brasileiro a partir dos anos 1960, com a aprovação da proposta da cédula de cinco cruzeiros pela Casa da Moeda, dando início à nacionalização definitiva dos trabalhos de projeto e de produção de cédulas pelo Brasil, atingida com o lançamento da família de cédulas projetada por Aloísio Magalhães, e com a modernização da Casa da Moeda no final dos anos 1970.

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EXTRACT (SEE PDF FOR FULL ABSTRACT): Variations in temperature that occurred in the North Pacific thermocline (250 to 400 meters) during the 1970s and 1980s are described in both a numerical simulation and XBT observations.

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The last major pearl fishery in the Gulf of Mannar was held in February-March, 1958, when about 4.5 million oysters were collected from the south-west Cheval Paar by dredging. (Sivalingam 1961). Subsequently, two smaller fisheries, one in 1960 and another in 1961 took place. In these two fisheries one million oysters and four hundred thousand oysters respectively were collected from the Cheval paar by dredging. (De Fonselm 1953). Inspections of the Banks were carried out in 1962, 1963, 1964 and 1965. (Balasuriya 1964 and Silva 1965 and 66). Since then inspections were not possible due to one of two reasons or both the non-availability of operational dredges and a suitable vessel for this type of work.The "Pesalai" a 235-ton stern trawler was made available by the Ceylon Fisheries Corporation management for the 1970 inspection. Two new 6-foot dredges turned out by the Government Factory were also available for this work. However, the survey was limited to 3 days-the period for which the vessel had been released. It was further limited to those areas of the banks over 6 fathoms in depth because of the risk in operating a large vessel in shallower depths.

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The Austrian-Ceylonese hydrobiological mission of 1970 investigated and made collections from 36 flowing water systems (brooks, torrents, rivers); of these, 34 water systems were in the mountains regions of south-west and south-east of Sri Lanka. In the crystalline mountain region, the water systems are extremely poor in electrolytes, very soft and slightly acid; these torrential streams have strong falls, high flow velocities and boulder bottoms. The water temperatures increase from the sources and brooks at 2,000 m altitude to the mouths from 15°C to 28°C. The density of animal population (macro and meso-fauna) increases from the river bank regions (and pools) towards the sections with strong current and reaches on the rocks in the cascades a density of 500 to appr. 750 individuals/1/16m².

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The morphology, climate, geology and geochemistry of Sri Lanka is briefly described. The separation into a wet zone (the south-west and greater part of the central highland) and a dry zone with two very dry parts in the south-east and in the north-west, is obvious and has great influence on the hydrochemistry of the island. Geology is very homogenous (Precambrian crystalline series) and some Jurassic and Miocene limestones (only in the north).

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In the study are described five species of watermites, collected by the Austrian-Ceylonese hydrobiological mission 1970 in torrents of the highlands of south-west Sri Lanka. The species are: Torrenticola (Monatractides) pusta Cook, 1967, T.(M.) Oxystoma hamata (Lundbald, 1941), T.(M.) ceylonensis nov. spec., Atractides schwoerbeli Lundbald, 1969 and Arrenurus (Micruracarus) madaraszi Daday, 1898.

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Sri Lanka is a comparatively small island (65.584 km²) within the equatorial belt of calms. There are only slight seasonal variations in temperature, air humidity and day length. A description is given of the amphibian and reptile material brought back from the Austrian Indo-Pacific expedition, 1970-71. Some notes on the habitat of the animals are included.

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The first comprehensive study on the freshwater Caridea of Sri Lanka was by Arudpragrasm and Costa in 1961. Although it was the intention of these authors to continue this study no opportunity was available to them. The present faunal survey however has afforded the present writer to make a detailed study of the distribution of these shrimps especially in the mountain streams of the south-west of Sri Lanka. Two species and two sub-species of Caridina, one species of Atya and four species of Macrobrachium were collected by the hydrobiological mission from the hill streams of Sri Lanka.

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The author describe a new species of Drepanosticta from Sri Lanka. This new species is named in honour of the collector, Professor Dr. F. Starmühlner.

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This report comprises a summary of parasitic copepods from fishes in Ceylon, as isolated from the branchial material of fishes belonging to previous collections. Seven copepod species are described in detail, as well as one species of Branchiura and one species of Isopoda. Caution is advocated to avoid further introductions via parasite-infested fishes, since only four of the above species are endemic.

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The intensive collecting of Prof. Dr. F. Starmühlner and Prof. Dr. H. H. Costa in Ceylon in 1970 produced among others some Dysticidae. The material turned out to be especially interesting as it comes all together from running waters, in which otherwise collecting is infrequent. From Sri Lanka quite a lot of species of Dytiscidae are already known.