1000 resultados para Dell, Richard


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This brief chapter describes the occurrence Macrocyclops distinctus in the littoral zone of the Rybinsk Reservoir. Sampling was undertaken in summer and autumn 1961. In order to facilitate distinction of M. distinctus and Macrocyclops fuscus the author presents drawings of the whole species and certain characteristic parts of the body, and also gives a description of M. distinctus, comparing it with M. fuscus.

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Megacyclops viridis Jurine, noticed in Lago Maggiore in 1912 by De Marchi from the littoral vegetation of Pallanza, is a normal member of the littoral plankton of the lake. The subgenus Megacyclops, created by Kiefer in his revision of the viridis-vernalis group, contains european and american species some of which are today considered as varieties of the species viridis. This paper examines morphology and of the distribution of the Italian viridis in Lake Maggiore.

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Eudiaptomus vulgaris Schmeil is the most abundant copepod in Lake Maggiore and forms also, in respect to other entomostraca, the most important element, through its average biomass and because it is fairly numerous throughout the year. Plankton samples collected in a systematic and quantitative way, gave the opportunity to study some aspects of the dynamics of the population of this copepod, in safety in view of the uncertainty which in this kind of study can ensue when samples are taken only at a single station - in consequence of the changes in size of population between different water masses. The results of the biometrical observations are of the population of Eudiaptomus vulgaris is presented.

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In recent times, some specialists have begun to study the subject of food selection of fish in an organized way, thus highlighting its importance. In the present work, the author intends to evaluate the impact of predation on the eupelagic zooplanktonic biocenosis of Lake Maggiore, producing, in this way, as far as possible, a basis for a better understanding of the population dynamics of the species of zooplankton directly involved. Another aspect which has been studied is that related to the mechanism of selective capture set in action by the predator. To this end the study tries to bear in mind that the subject should be interpreted as a function of numerous factors acting contemporaneously, that is as the interaction of characters peculiar to the predator and to the prey. The species studied, locally called ”bondella”, belongs to the family Salmonidae, subfamily Coregoninae and was introduced into Lake Maggiore in 1950.

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In freshwater environments of modest size and without notable ecological structure, there is usually present only one diaptomid species. When two or more diaptomid species are present in the same habitat, generally their body dimensions are distinctly different. There are only four examples of co-existence of Arctodiaptomus bacillifer (Koelb.) and Acanthodiaptomus denticornis (Wierz.) situated at higher altitudes alpine lakes. The article discusses the results of sampling in the summer of 1953 and the problem of the co-existence of Arctodiaptomus bacillifer, Acanthodiaptomus denticornis and Heterocope saliens.

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Dormancy has been observed in several species of Cyclops. Animals in dormancy are characterised by almost complete inactivity of the main appendages and sluggish intestinal peristalsis. In Cyclops vicinus dormancy can take place in copepod stages III (19%), IV (78%) and V (3%) but one and the same animal only in one developmental stage. The author gives his own results between frequency of dormancy and photoperiod (20 C, 1000 lux). He concludes that dormancy in C. vicinus can be influenced by day length and can be ended prematurely by short day length.

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The problem of the peculiar reproductive biology of the cladoceran Daphnia middendorffiana is investigated from a cytological viewpoint, and by direct observation the meiotic phenomena of the eggs both subitaneous and resting is studied. and during maturation, the true mechanism of the succession of reproductive phases of different ecological significance. Samples were collected in the Italian Alpine Lake of Campo 4°.

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O presente estudo ambiciona examinar as escritas literárias de Ralph Waldo Emerson (1803-1882) e Henry David Thoreau (1817-1862) considerando-as como uma forma de presságio de arte na América, ou seja, como uma escrita literária que parece ter sido herdada no ambiente artístico das obras plásticas contemporâneas de Richard Serra (1939-) e Waltercio Caldas (1946-), entre outras. Tal herança endossa a noção de linguagem ordinária, compreendida como o ponto de acolhimento, ou de uma inquietação, que se faz presente nas circunstâncias da contemporaneidade. Por sua vez, o gesto de endereçamento que envolve estas escrituras expressa a marca de uma indecibilidade acerca da continuidade ou descontinuidade da existência de categorias como literatura, filosofia e artes. Assim, a problematização dessas remissões ganha vulto no presente estudo, por meio de uma abordagem em perspectiva comparada entre Thoreau, Emerson, Waltercio, Serra e outros. E deste modo, a questão que se estabelece nesse panorama diz respeito aos problemas do pensamento, que em âmbito plástico parecem se estender para uma tradição crítica no Novo Mundo

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Este trabalho apresenta uma análise crítica à forma de se abordar casos jurídicos e proferir decisões judiciais denominada abordagem judicial pragmática, disseminada pelo magistrado e professor norte-americano Richard A. Posner. O objetivo é explicitar suas principais características e contornos, bem como sua repulsa pela teorização abstrata e pelos debates e argumentos morais na decisão judicial. A partir disso, pretende-se refutar parte dessa abordagem pragmática, por meio de argumentos levantados por filósofos morais e profissionais do direito a saber: Ronald Dworkin, Charles Fried, Anthony Kronman, John T. Noonan Jr e Martha C. Nussbaum - em defesa de uma abordagem que prega a inevitável utilização do raciocínio teórico, assim como a argumentação e reflexão moral na resolução de casos difíceis relacionados ao direito. Também será destacado como a repulsa pragmática pela teoria moral e abstrata é incompatível com a conjuntura justeórica contemporânea e como a análise de alguns casos difíceis expõe a falibilidade, ainda que parcial, desse estilo de abordagem pregado por Posner.

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Mottram, S. (2005). Reading the rhetoric of nationhood in two Reformation pamphlets by Richard Morison and Nicholas Bodrugan. Renaissance Studies. 19(4), pp.523-540. RAE2008

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Mottram, S. (2005). Imagining England in Richard Morison's Pamphlets against the Pilgrimage of Grace (1536). Comitatus: A Journal of Medieval and Renaissance Studies. 36, pp.41-67. RAE2008

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http://www.archive.org/details/themissionofmeth00greeuoft