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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Écologie et dynamique des Cynoglosses du plateau continental sénégambien : biologie de Cynoglossus canariensis Steind, 1882.

Thiam, Modou. January 1900 (has links)
Th. 3e cycle--Océanogr. biol.--Brest, 1978. N°: 86.
2

The age, growth and mortality of the lemon sole (Parophrys vetulus Girard) on the British Columbia fishing grounds

Ketchen, Keith Stuart January 1947 (has links)
Part of the general investigation being conducted by the Fisheries Research Board of Canada into the condition of the Pacific coast otter trawl fishery deals with the length and age analysis of the species of fish caught. The age of one of these species, the lemon sole, Parophrys vetulus GIrard has been determined through a study of the otoliths or ear-stones. In general the older fisheries and those closest to large Canadian and American markets produce the youngest and the smallest fish. Soles of four and five years of age predominate in the catches from the Strait of Georgia and from the west coast of Vancouver Island. The comparatively recent fisheries of Queen Charlotte Sound and Hecate Strait show a predominance of six and seven year old fish. The male lemon sole reaches an age of ten years and a length of 400mm., while the female reaches twelve or thirteen years of age and grows to a length of over 500mm. The female sole, between four and eight years of age grows approximately 11 mm. more per year than the male. The fish in the Strait of Georgia and in northern Hecate Strait have a slightly greater growth rate than those on the west coast of Vancouver Island and in Queen Charlotte Sound. Marked differences in total annual mortality rates have been shown. In the Strait of Georgia and on the west coast of Vancouver Island the rate is between 60% and 70%. In Queen Charlotte Sound the rate is 52%, and in northern Hecate Strait it is between 30% and 40%. The relative recency of the northern Hecate Strait fishery has raised the suggestion that the total mortality rates of 30% in female fish and 39% in male fish approach the natural mortality rate. Dominance of the 1939 year class has been observed in the s study of fish taken during 1944, 1945 and 1946 in northern Hecate Strait. In the last year another strong year class, that of 1942, made its appearance. The relative lack of success in the brood years of 1940 and 1941 was the factor responsible for the absence of small fish in the catches during the fishing seasons of 1944 and 1945. / Science, Faculty of / Zoology, Department of / Graduate
3

A study of the principal spawning grounds and of the spawning of the lemon sole, Parophrys vetulus (Girard), in the Gulf of Georgia in relation to the commercial fishery

Taylor, Frederick Henry Carlyle January 1947 (has links)
The winter fishery for lemon sole in the gulf of Georgia depends on populations spawning in Baynes sound and Boat harbour from January to March. The peak period in 1946 was from January 24 to February 23 in Baynes sound and 10 days earlier in Boat harbour. Although some spawning took place throughout the whole of both regions, with the exception of Porlier pass, spawning was more intense in certain areas of each region. Minimum estimates of fishing intensities of 42% and 26.3% for the Baynes sound and Boat harbour regions respectively appear too heavy to maintain the fishery at its present level. During the 1947 fishing season Baynes sound was largely closed to trawling; in Boat harbour the percentage tag recovery was 6.3% as compared to 18.8% for the same period in 1946. These recoveries indicated an average annual increase in length of 7.3% or in weight of 21.9%. Lemon sole spawning in Baynes sound dispersed to parts of the gulf north of Nanoose bay, while those spawning in Boat harbour dispersed southward as far as the American boundary. Although these two populations do not mix to an appreciable extent, their composition is very similar except for a larger number of immature and small mature fish in Baynes sound. The Porlier pass population, consisting of two-thirds immature fish differed markedly. An estimate of the amount of population change on the spawning grounds was made by comparing the variations in tag returns per period calculated on the basis of a constant number of tagged fish available and a constant weight of fish caught each period. Stomach analysis showed that lemon sole do not feed actively during the winter and that fully matured fish feed less actively than- immature or spent individuals. Worms, clams, and brittlestars formed the principal foods. / Science, Faculty of / Zoology, Department of / Graduate
4

Méthodes de production des juvéniles chez trois Poissons marins : le Bar, Dicentrarchus labrax, la Sole, Solea solea et le Turbot, Scophtalmus maximus.

Girin, Michel. January 1979 (has links)
Th.--Sci. nat.--Paris 6, 1978.
5

The availability , exploitation, abundance and movement of the butter sole (Isopsetta isolepis Lockington) in Skidgate Inlet, Queen Charlotte Islands, during 1946

Manzer, James I. January 1949 (has links)
The accumulation of butter sole within Skidegate inlet provides an important winter trawl fishery for northern British Columbia. The availability, prior to spawning, has been determined from catch statistics offered willingly by fishermen and industry. The availability fluctuates during the season but the real peak period, after the accumulated stock has been removed, occurs during the last week that fishing was permitted. Distortions which could have been produced by boats of different fishing efficiencies and, also, by boats which fished for only part of the season are compensated for. The minimum estimate of fishing intensity, as determined from tagging experiments, is 30.8%. The abundance of the stock, calculated from the fishing intensity, sex ratios, and length-weight data, is approximately 3,130,000 fish. The differential appearance of the sexes upon the grounds has been determined. The male fish appear upon the grounds first and are later followed by the females. Tag returns provide information concerning movement between the various grounds within the inlet and also dispersion from the inlet into Hecate strait after spawning has occurred. / Science, Faculty of / Zoology, Department of / Graduate
6

Risas en medio del apocalipsis. Lo cómico en una novela sobre el fin del mundo de Homero Aridjis

Aranda Urrutia, Diego January 2014 (has links)
Informe de Seminario para optar al grado de Licenciado en Lengua y Literatura Hispánica mención Literatura
7

Skålgropar i Kronobergs län : - en diskussion om alternativt medvetandetillstånd och passageritualer i bronsålderssamhället

Karlsson, Cecilia January 2009 (has links)
<p>This thesis discusses South Scandinavian cup marks in general, and cup marks in Kronobergs County in particular. The question is whether the cup mark phenomena can be viewed as an ordinary family-based cult for a kind of everyday use, or more likely as a community passage ritual. The thesis also suggests that cup marks were made by ritual participants in, or in the process of trying to reach, an altered state of consciousness.</p>
8

Skålgropar i Kronobergs län : - en diskussion om alternativt medvetandetillstånd och passageritualer i bronsålderssamhället

Karlsson, Cecilia January 2009 (has links)
This thesis discusses South Scandinavian cup marks in general, and cup marks in Kronobergs County in particular. The question is whether the cup mark phenomena can be viewed as an ordinary family-based cult for a kind of everyday use, or more likely as a community passage ritual. The thesis also suggests that cup marks were made by ritual participants in, or in the process of trying to reach, an altered state of consciousness.
9

LA DESACRALIZACIÓN DEL HÉROE Y LA CONSERVACIÓN DE LOS MITOS COSMOLÓGICOS EN LA LEYENDA DE LOS SOLES DE HOMERO ARIDJIS

Godoy Sepúlveda, ALfredo January 2008 (has links)
Este estudio se centrará en la novela de 1994, La leyenda de los soles, del escritor y poeta mexicano Homero Aridjis. La abordaremos desde distintas perspectivas, las cuales son: la historia literaria, la sociología, el psicoanálisis, la antropología, la mitología comparada, la mitología azteca propiamente tal, y en el diálogo con otras obras u otros autores, como el mexicano Alfonso Reyes, quien revelará ser un interlocutor directo de esta novela. Desde estos múltiples puntos de vista, nos ocuparemos de caracterizar al héroe, la megalópolis, el mundo representado, y la tradición mitológica que está implicada en la visión de mundo propuesta por el autor. De acuerdo a esto, plantearemos la hipótesis de que en esta obra hay una desacralización del héroe, pero asimismo una reafirmación de los mitos cósmicos, que en este caso se materializan en la leyenda del Quinto Sol. Ante tal propuesta, es fundamental investigar las mitologías de los pueblos antiguos, y lo que éstas significaban, tanto a nivel individual y colectivo, como en un nivel cósmico. Para ello acudiremos al psicoanálisis y a la antropología respectivamente, además de las mitologías comparadas, para analizar cómo el mito se vuelve un constructor del mundo representado en esta obra, empezando por el título, que lo liga directamente a una tradición prehispánica, sin cuyo conocimiento la comprensión de la obra resultaría precaria.
10

Análise mecânica e biomecânica de solados para calçados

Palhano, Rudnei January 2013 (has links)
A crescente busca por novos materiais, com baixo custo e que auxiliem na performance humana é um incentivo para os pesquisadores e para a indústria calçadista. O calçado deixou de ser acessório e tornou-se uma proteção para o sistema músculo-esquelético, tendo como principal objetivo o conforto. Este trabalho teve como objetivo analisar e correlacionar as propriedades mecânicas e Biomecânicas de calçados com diferentes solados. Neste estudo foram caracterizadas, analisadas e comparadas as propriedades mecânicas, a absorção do impacto em diferentes faixas e a aceleração do calçado e da tíbia durante a marcha com diferentes materiais no solado. Os ensaios foram realizados em um modelo de calçado utilizando diferentes materiais na região do calcâneo. Os materiais utilizados foram EVA, PU, TPU, SBR e madeira. Os materiais foram caracterizados segundo a sua dureza, densidade, energia absorvida, energia retornada, energia perdida e rigidez. Para os ensaios biomecânicos foram utilizados 11 sujeitos do gênero masculino e foram avaliadas a taxa de aceitação do peso em diferentes faixas, o primeiro pico de força, impulsão, segundo pico de força, pico da força ântero-posterior, aceleração do calçado, taxa de aceitação de aceleração, aceleração tibial e transmissibilidade de aceleração. Os sujeitos caminharam em uma passarela na velocidade de 5 km/h e utilizaram os calçados com diferentes solados randomicamente. Os resultados dos ensaios evidenciaram: a) diferenças nas propriedades mecânicas dos materiais; b) a taxa de aceitação do peso é a forma mais adequada de analisar a absorção do impacto durante a marcha; c) a aceleração do calçado e a transmissibilidade de aceleração são possíveis diferenciar as propriedades mecânicas dos materiais utilizados nos solados. / The growing search for new materials, with low cost and to assist in human performance is a pursuit for researchers and for the footwear company. The footwear is no longer an accessory and is a protection for the musculoskeletal system, and the main more important characteristic is the comfort. The aim this study was to analyze and correlate the mechanical properties and biomechanics of shoes with different heel soles. In this study it is characterized, analyzed, and compared the mechanical properties, the vertical-force loading rate in different levels and the shoes vibration and tibia vibration during the gait with different in the heel sole. The tests were performed with a shoe with different materials heel soles. The materials used were EVA, PU, TPU, SBR and wood. The materials were characterized by hardness, density, energy absorbed, energy return, energy lost and stiffness. The biomechanical tests were used 11 subjects (males). Parameter were: vertical-force loading rate, impact peak, impulse, antero-posterior ground reaction force, shoes vibration, vibration loading rate, tibia vibration and transmissibility. The subjects walked at a walk at the speed of 5 km/h and used shoes randomly. The tests results showed differences in mechanical properties of materials and also for the vertical-force loading rate. There is no difference in the antero-posterior ground reaction peak and impulse in the shoes. But, there is statistic difference in the shoes vibration and vibration loading rate. Were found correlate between transmissibility and shoes vibration with mechanical properties.

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