880 resultados para Hunting tactics


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A presente investigação trata um tema muito discutido hoje em dia nos meios da comunicação social em Portugal, mas que se relaciona com uma problemática mais ampla de comunicação nas organizações: a integração dos estagiários de jornalismo nas estruturas redactoriais. Vários autores como Sara Meireles Graça, Paulo Faustino e José Luís Garcia têm-se debruçado sobre o problema do “corrupio” de jornalistas estagiários nas redacções e sobre outro tema muito controverso, directamente relacionado, que é o “trabalho escravo” no jornalismo (Garcia et. al., 2009, p. 147). Pretendemos aprofundar estas questões, averiguando a sua dimensão e qual o interesse das empresas neste e noutros processos de recrutamento e integração organizacional, assim como o que pensam sobre tudo isto os estagiários e outros intervenientes. O estudo terá como objecto as três estações generalistas de televisão em Portugal. A pesquisa empírica desenvolveu-se nestas três estações de televisão que, salvaguardando as suas particularidades, foram tomadas como organizações-exemplo para a análise dos processos de integração e socialização organizacional. Realizámos um estudo longitudinal com base numa metodologia de cariz qualitativo a partir do olhar, nomeadamente, dos responsáveis pelos estágios nas redacções e dos estagiários, que são os principais atores neste processo. Os resultados apontam para a existência em algumas televisões, de estagiários curriculares a desempenhar funções como se de jornalistas profissionais se tratassem. Em relação a este tema, também existem divergências de opinião entre as entidades que regulam a profissão e as que representam as televisões. Quanto às tácticas de socialização, as televisões conseguem formar profissionais autónomos, apesar da existência de alguns casos de insatisfação e desinvestimento por parte de estagiários.

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El presente trabajo se basa en el análisis de las prácticas sonoras y, a partir de ahí, de una apuesta por un nuevo campo de estudios, el de los Estudios Sonoros; cuyo fin último es establecer una perspectiva epistemológica y política de las prácticas experimentales con sonido, en diálogo con proyectos provenientes de los Estudios Culturales, como son el proyecto modernidad/ colonialidad, las teorías poscoloniales y los estudios subalternos. Desde estas posiciones teóricas y políticas, estoy conciente de que el sonido, y sus posibilidades experimentales, articulan un régimen influyente en el mundo contemporáneo. Razón por la cual, sobre todo, esta es una reflexión desde las prácticas sonoras que surgen en dos ciudades andinas: Quito y Bogotá, como una expresión emergente para establecer encuentros Sur-Sur, que puedan generar diálogos epistemológicos sobre el sonido. En otras palabras, en este libro estoy proponiéndo a mis lectoras y lectores, una especie de “juego epistémico”: comprender el sonido como un lugar de conocimiento.Y el sonido es conocimiento precisamente porque el sonido nos permite vernos (y permite verme) como un sujeto históricamente ubicado. En el capítulo primero abordaré la pregunta de cómo se fue articulando el régimen discursivo del sonido como arte, dentro de diálogos y conflictos que se generaron en el contexto de la Guerra Fría que, para el caso de Latinoamérica, constituyó la transferencia de conocimientos articulados desde promesas como el desarrollismo y la modernización. También analizaré el cómo se configuraron, tanto en Quito como en Bogotá, las nuevas subjetividades “artísticas” frente al discurso de las vanguardias europeas del siglo XX y el experimentalismo estadounidense. Como verán mis lectoras y lectores, estos modelos, aparentemente originales e innovadores, fueron influidos por formas de saber y poder moduladas alrededor de la idea de la renovación de las artes a través del sonido, formulación que instaló el sonido como dispositivo/materia desde el cual, en detrimento de lo local, se articuló la fantasía de un universal deseado: las máquinas de sonido y de reproducibilidad técnica. En el segundo capítulo me centraré en algunas prácticas de experimentación sonora para indagar cuestiones como el estilo, procedimiento posmodernista ampliamente diseminado dentro de las instituciones artísticas y de éstas hacia la vida cotidiana. A partir de lo cual intentamos esclarecer el porqué de la confiscación y sometimiento de lo sonoro bajo el cuidadoso encierro del régimen discursivo del arte, que de manera eficiente lo absorbe como un “nuevo” medio para disciplinarlo y nombrarlo como proyecto sonoro, pieza sonora, instalación sonora, performance sonoro, acción sonora, objeto sonoro, paisaje sonoro, composición, loop. En otras palabras, cómo todo lo que genera el posmodernismo es apropiado por las universidades para crear la noción de “pastiche”, en donde todo cabe, bajo la indulgencia del “estilo”, procedimiento desde el cual se va instalando el régimen de verdad de un nuevo universal deseado: El Arte Sonoro. En este mismo capítulo, indagamos sobre las lógicas de producción de estas prácticas, para avanzar hacia las lógicas culturales donde lo sonoro se define y redefine por el posicionamiento y el lugar desde el que actúan los sujetos. Bajo estas consideraciones, queda planteada la propuesta, acuñada por esta investigación, la de un nuevo campo de estudio: Los Estudios Sonoros, propuesta que debe ser entendida como lo que algunos intelectuales latinoamericanos llaman epistemes emergentes11, precisamente porque esta investigación hace un esfuerzo por esclarecer las interdependencias existentes entre prácticas artísticas con sonido, el campo discursivo del arte y otras construcciones discursivas de la modernidad-colonialidad que establecen y regulan la formación del régimen sonoro. En el capítulo tercero analizaré cómo un “medio de creación” se vuelve hegemónico y cómo ciertos artistas que usan el sonido, bajo la pretensión de representar la marginalidad, marginalizan aún más a las personas que han sido históricamente subalternizadas. Seguido de este análisis, en el capítulo cuarto, indagamos sobre las tácticas que marcan nuevas formas de adhesión, de representación y de resistencia cultural, las mismas que son estrategias suplementarias frente, y en contra, de los discursos dominantes de las prácticas artísticas con sonido y las geopolíticas de conocimiento.

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We tested the hypothesis that cryptically colored eggs would suffer less predation than conspicuous eggs in the ground-nesting red-legged partridge, Alectoris rufa. We used A. rufa as a model species because it has a wide range of natural egg colors, the eggs are widely available from breeding farms, and nests are easily mimicked because they are scrapes containing no vegetation. The study was conducted in the spring of 2001 in forest and fallow fields of central Spain in Castilla La Mancha, Ciudad Real. We used 384 clutches of natural eggs that were white, white spotted, brown, or brown spotted. Within clutches, eggs were consistent in color and size; among clutches, color differences were distributed across habitats. Clutches were checked once after 2 wk of exposure. Cryptic coloration had a survival advantage that was dependent on the local suite of predators. Rodent predation was nonselective with respect to clutch color; however, avian predation was significantly higher for conspicuous clutches. In addition, there was an interaction of landscape and egg color for avian predation. In forest landscapes, the clutches with highest survival were brown spotted, whereas in fallow landscapes, brown and brown spotted clutches had higher survival than white and white potted clutches. Thus, both the predator suite and the landscape had significant effects on the value of cryptic egg coloration. Our study is relevant for conservationists and managers in charge of restocking programs in hunting areas. The release of other partridge species or their hybrids could result in hybridization with wild partridges, potentially leading to nonoptimal clutch pigmentation and reduced survival of the native species. We therefore recommend that local authorities, managers, and conservationists be cautious with the use of alien species and hybrids and release only autochthonous species of partridges within their natural ranges.

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Individual behavior that reduces vulnerability to predation can affect population dynamics of animals. Temperate-nesting Canada Geese (Branta canadensis maxima) have increased steadily throughout the Atlantic flyway and have become a nuisance in some parts of their range. The objective of our study was to describe movements and habitat use during the postbreeding period of Canada Geese recently established in southern Québec. More specifically, we wanted to determine whether geese were using areas where hunting was allowed to assess the potential of harvest to control the number of geese. We tracked a sample of geese fitted with radio or conventional alphanumeric collars throughout the fall in three zones characterized by different habitats and hunting pressure. Before the hunting season, geese left the breeding area where hunting was allowed to reach suburban areas where firearm discharge was prohibited or hunters’ numbers were low. These postbreeding movements occurred when juveniles were approximately three months old. We observed few local movements among zones once migrant geese from northern breeding populations reached the study area. Radio-collared geese used mainly natural habitats (75.4 ± 2.6%), followed by urban (14.4 ± 2.7%), and agricultural habitats (10.3 ± 0.8%). They were located 73.8 ± 6.2% of the time in areas where hunting was prohibited. Geese that attended their juveniles during brood rearing were more prone to use areas where firearm discharge was restricted than geese that had abandoned or lost their brood. This study shows that under the prevailing regulations, the potential of hunting to manage the increasing breeding population of Canada Geese in southern Québec is limited.

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Restrictions in technology have limited past habitat selection studies for many species to the home-range level, as a finer-scale understanding was often not possible. Consequently, these studies may not identify the true mechanism driving habitat selection patterns, which may influence how such results are applied in conservation. We used GPS dataloggers with digital video recorders to identify foraging modes and locations in which endangered Burrowing Owls (Athene cunicularia) captured prey. We measured the coarse and fine-scale characteristics of vegetation at locations in which owls searched for, versus where they caught, vertebrate prey. Most prey items were caught using hover-hunting. Burrowing Owls searched for, and caught, vertebrate prey in all cover types, but were more likely to kill prey in areas with sparse and less dense vegetative cover. Management strategies designed to increase Burrowing Owl foraging success in the Canadian prairies should try to ensure a mosaic of vegetation heights across cover types.

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Rockshelter Baaz in the Damascus region of Syria provided a variety of botanical remains from the Late Pleistocene and Early Holocene period. These remains provide new information about the vegetation evolution in this region. The earliest occupational levels correspond with a moisture peak during the Late Pleistocene, between ca. 34-32 kyr b.p., when pine expanded. The next occupations took place during extreme arid conditions, ca. 23-21 kyr b.p., and probably during the Last Glacial Maximum when a steppe vegetation was established. The occupation level of the Younger Dryas, represented by Natufian remains, suggests that the area had been covered by almond-pistachio steppe, similar to later periods of the Early Holocene, and was probably located just outside the range of dense wild cereal stands. There is no drastic impact of the Younger Dryas visible on the vegetation in the botanical remains. The lack of fruits and seeds at Baaz indicates that the site was more likely to have been a temporary hunting post rather than a plant processing site for much of its history. It is ideally suited to this purpose because of its location over the Jaba'deen Pass and the associated springs. However, archaeological remains from the Natufian period, suggest that the site was more permanently occupied during this time.

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Knowledge of tropical raptor habitat use is limited and yet a thorough understanding is vital when trying to conserve endangered species. We used a well studied, reintroduced population of the vulnerable Mauritius Kestrel Falco punctatus to investigate habitat preferences in a modified landscape. We constructed a high resolution digital habitat map and radiotracked 13 juvenile Kestrels to quantify habitat preferences. We distinguished seven habitat types in our study area and tracked Kestrels from 71 to 130 days old during which they dispersed from their natal territory and settled within a home-range after reaching independence. Mean home-range size was 0.95 km(2) characterized by a bimodal pattern of intensity around the natal site and post-independence home-range. Compositional analysis showed that home-ranges were located non-randomly with respect to habitat but there was no evidence to suggest differential use of habitats within home-ranges. Native and semi-invaded forest and grassland were consistently preferred, whereas agriculture was used significantly less than other habitats. No difference was found between the available length of edge dividing native forest and grassland within a home-range when compared to that available within a 2.35-km buffer around their nest-site, based on the maximum distance a juvenile was found to disperse. Repeating the analysis in three dimensions gave very similar results. Our results suggest that Mauritius Kestrels are not obligate forest dwellers as was once thought but can also exploit open habitats such as grassland. Kestrels may be using isolated mature trees within grassland as vantage points for hunting in the same way as they use the natural stratified forest structure. We suggest that the avoidance of agriculture is partly due to a lack of such vantage points. The conservation importance of forest degradation and agricultural encroachment is highlighted and comparisons with the habitat preferences of other tropical falcons are discussed.

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The interactions among the multiple factors regulating predator-prey relationships make predation a more complex process than previously thought. The degree to which substandard individuals are captured disproportionately seems to be better a function of the difficulty of prey capture than of the hunting techniques (coursing vs. ambushing predators). That is, when the capture and killing of a prey species is easy, substandard individuals will be predated in proportion to their occurrence in the prey population. In the present study, we made use of eagle owls Bubo bubo and their main prey, the rabbit Oryctolagus cuniculus: (a) the brightness of the white tails of rabbits seems to be correlated with the physical condition of individuals, (b) by using the tails of predated rabbits as an index of individual condition, we found that eagle owls seem to prefer substandard individuals (characterized by duller tails), and (c) by using information from continuous radiotracking of 14 individuals, we suggest that the difficulty of rabbit capture could be low. Although the relative benefits of preying on substandard individuals should considerably decrease when a predator is attacking an easy prey, we hypothesise that the eagle owl preference for substandard individuals could be due to the easy detection of poor individuals by a visual cue, the brightness of the rabbit tail. Several elements allow us to believe that this form of visual communication between a prey and one of its main predators could be more widespread than previously thought. In fact: (a) visual signalling plays a relevant role in intraspecific communication in eagle owls and, consequently, visual signals could also play a role in interspecific interactions, and (b) empirical studies showed that signals may inform the predator that it has been perceived, or that the prey is in a sufficiently healthy state to elude the predator.

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Movements and activity patterns of an adult radio-tagged female brown bear accompanied by her cubs were documented for the first time in Rodopi area (NE Greece) from August 2000 to July 2002. Average daily movements were 2.45 +/- 2.26 SD km, (range 0.15-8.5 km). The longest daily range could be related to human disturbance (hunting activity). The longest seasonal distance (211 km), during Summer 2001 coincided with the dissolution of the family. With cubs, the female was more active during daytime (73 % of all radio-readings) than when solitary (28 %). The female switched to a more crepuscular behaviour, after separation from the yearling (July 2001). According to pooled data from 924 activity - recording sessions, during the whole monitoring period, the female was almost twice as active during day time while rearing cubs (51 % active) than when solitary (23 %). The autumn and early winter home range size of the family was larger (280 km(2)) than after the separation from the cubs (59 km(2)). During the family group phase, home range size varied from 258 km(2) in autumn to 40 km(2) in winter (average denning period lasted 107 days : December 2000-March 2001). The bear hibernated in the Bulgarian part of the Rodopi Range during winters of 2001 and 2002.

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Innovation continues to be high on the agenda in construction. It is widely considered to be an essential prerequisite of improved performance both for the sector at large and for individual firms. Success stories dominate the parts of the academic literature that rely heavily on the recollections of key individuals. A complementary interpretation focuses on the way innovation champions in hindsight interpret, justify and legitimize the diffusion of innovations. Emphasis is put on the temporal dimension of interpretation and how this links to rhetorical strategies and impression management tactics. Rhetorical theories are drawn upon to analyse the accounts given by innovation champions in seven facilities management organizations. In particular, the three persuasive appeals in classic rhetoric are used to highlight the rhetorical justifications mobilized in the descriptions of what took place. The findings demonstrate the usefulness of rhetorical theories in complementing studies of innovation.