936 resultados para Exotic animals


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Reports of the illegal use of clenbuterol as a growth promotant prompted the development of a competitive enzyme immunoassay for this drug. This procedure was utilized to study the elimination of clenbuterol from tissues in sheep medicated with both therapeutic and growth-promoting doses of the drug. The results indicated that prior to removal of medication clenbuterol was widely distributed throughout the animal tissues. However as the withdrawal periods increased fluid targets such as urine and bile became less effective at detecting clenbuterol usage. At both therapeutic and growth-enhancing concentrations of clenbuterol liver samples remained positive up to the maximum withdrawal time given in this experiment (15 days). Concentrations of clenbuterol likely to cause food poisoning (> 100 ng/g) were only detected in liver samples taken prior to the removal of medication. The highest recorded concentration of clenbuterol in muscle was 22.5 ng/g.

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We report the occurrence of four red macroalgae new to Europe. Two species were unambiguously determined to the species level with a DNA barcoding approach, while the remaining two species could only be assigned to a genus. Gelidium vagum was found in the Oosterschelde estuary (the Netherlands). Gracilariopsis chorda, Chondracanthus sp. and Solieria sp. were found in the Gulf of Morbihan in Brittany (France); Solieria sp. was also subsequently observed in the Thau Lagoon (France). Gelidium vagum and Gracilariopsis chorda are species originating from the north-western Pacific, around the Japanese archipelago. Phylogenetic analyses also show a likely Pacific origin for Chondracanthus sp. and Solieria sp. Three of these species are likely to have been introduced after 2008, indicating some active transport pathways between the Pacific and the north-eastern Atlantic. These findings also underline the importance of consistent and continuous local expertise (versus rapid assessment) in early warning systems.

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Examination of antiquarian records and feasting ritual in prehistoric Malta

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Lead is highly toxic to animals. Humans eating game killed using lead ammunition generally avoid swallowing shot or bullets and dietary lead exposure from this source has been considered low. Recent evidence illustrates that lead bullets fragment on impact, leaving small lead particles widely distributed in game tissues. Our paper asks whether lead gunshot pellets also fragment upon impact, and whether lead derived from spent gunshot and bullets in the tissues of game animals could pose a threat to human health.

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Roysten Abel’s The Manganiyar Seduction is perhaps the most popular performance of Indian folk music on the global festival market today. This performance of Rajasthani folk music is an apt exemplification of an auto-exoticism framed as cultural commodity. Its mise en scéne of musicians framed, literally, by illuminated red square boxes ‘theatricalises’ Rajasthan’s folk culture of orality and renders such a tradition the quality of strangeness that borders on theatre and music, contemporary and traditional. The ‘dazzling’ union of the Manganiyar’s music and scenography of Amsterdam’s red light district engendered an exotic seduction that garnered raving reviews on its global tour. This paper then examines the production’s performative interstices: the in betweenness of sound and sight where aural tradition is ‘spectacularised’, and the shifting convergences of tradition and cultural consumption. It further interrogates the role of reception in the construction of such ‘exotic’ spectacles.

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Very recent experimental and theoretical work has sought to find out whether or not complex arrangements of dipoles (such as flux-closure, vortex or skyrmion patterns) exist in ferroelectrics. While there is undoubtedly still considerable work to be done, enough insight has now been gained to warrant a brief discussion of progress to date. This review article attempts to undertake such a discussion.

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Various game theory models have been used to explain animal contests. Here we attend to the presumed cognitive abilities required by these models with respect to information gathering and consequent decision making. Some, such as the hawk/dove game and self-assessment models require very limited cognitive ability. By contrast, the broadly accepted sequential assessment model requires that contestants know their own abilities and compare them with information gathered about their opponent to determine which has the greater resource-holding power. However, evidence for assessment of relative abilities is sparse and we suggest that this complex ability is probably beyond most animals. Indeed, perceptual limitations may restrict information about an individual's own displays and thus preclude comparison. We take a parsimonious view and conclude that simple summation of causal factors accounts for changes in fight motivation without requiring mutual evaluation of relative abilities. © 2012 The Association for the Study of Animal Behaviour.