Psychology.

Se adapta a los contenidos y enfoques específicos del International Baccalaureate (IB), en los que se destaca, sobre todo, la investigación y sus métodos. Ayuda a los estudiantes a reflexionar sobre la psicología y su relación con las situaciones familiares, su evolución como materia y su utilización de forma intercurricular.También, incluye los perfiles de psicólogos importantes a lo largo de la historia.

A identidade moral e a integridade são preditoras da motivação moral?

Com o objetivo de analisar os componentes que induzem o comportamento moral, apoiámo-nos nas teorias psicológicas que admitem a importância do papel das emoções e da identidade na motivação para a ação moral, contrariamente ao que era defendido pelas teorias construtivistas, que apenas referiam a cognição como motor do funcionamento moral. Deste modo elegemos a identidade moral e a integridade como variáveis que podem estar associadas à motivação moral. Participaram 91 adultos emergentes, com idades compreendidas entre os 18 e os 25 anos (M = 20,63; Dp = 2,33), 14 do género masculino e 77 do género feminino. Para avaliar a motivação moral, a identidade moral e a integridade utilizámos respetivamente a PMAM, EIM e EI. Os objetivos foram verificar se existem diferenças individuais na consciência moral e nas emoções atribuídas a atos de transgressão, se a intensidade das emoções auto-atribuídas varia em função da consciência moral, e se a identidade moral e a integridade estão associadas à motivação moral. Os resultados mostram que existem diferenças individuais tanto na consciência moral como na atribuição de emoções. Os sujeitos avaliaram as transgressões de cuidado, não cuidar de parente e infidelidade, com emoções mais negativas e com maior utilização de consciência moral de transgressão, do que as transgressões anti-sociais, fraude e mentira. Verificámos também que a intensidade emocional varia em função da consciência moral. As categorias de Transgressão Identitária e Transgressão estão associadas com emoções mais negativas e as de Transgressão Relativizada e Não Transgressão estão relacionadas com emoções menos negativas. Foi ainda encontrada associação entre a identidade moral e integridade com a motivação moral, mas apenas para as transgressões anti-sociais.

Ecological specificity of arbuscular mycorrhizae: evidence from foliar- and seed-feeding insects

Arbuscular mycorrhizal (AM) fungi have a variety of effects on foliar-feeding insects, with the majority of these being positive, although reports of negative and null effects also exist. Virtually all previous experiments have used mobile insects confined in cages and have studied the effects of one, or at most two, species of mycorrhizae on one species of insect. The purpose of this study was to introduce a greater level of realism into insect-mycorrhizal experiments, by studying the responses of different insect feeding guilds to a variety of AM fungi. We conducted two experiments involving three species of relatively immobile insects (a leaf-mining and two seed-feeding flies) reared in natural conditions on a host (Leucanthemum vulgare). In a field study, natural levels of AM colonization were reduced, while in a phytometer trial, we experimentally colonized host plants with all possible combinations of three known mycorrhizal associates of L. vulgare. In general, AM fungi increased the stature (height and leaf number) and nitrogen content of plants. However, these effects changed through the season and were,dependent on the identity of the fungi in the root system. AM fungi increased host acceptance of all three insects and larval performance of the leaf miner, but these effects were also season- and AM species-dependent. We suggest that the mycorrhizal effect on the performance of the leaf miner is due to fungal-induced changes in host-plant nitrogen content, detected by the adult fly. However, variability in the effect was apparent, because not all AM species increased plant N content. Meanwhile, positive effects of mycorrhizae were found on flower number and flower size, and these appeared to result in enhanced infestation levels by the seed-feeding insects. The results show that AM fungi exhibit ecological specificity, in that different. species have different effects on host-plant growth and chemistry and the performance of foliar-feeding insects. Future studies need to conduct experiments that use ecologically realistic combinations of plants and fungi and allow insects to be reared in natural conditions.

Predation of Bradysia sp (Diptera: Sciaridae), Liriomyza trifolii (Diptera: Agromyzidae) and Bemisia tabaci (Hemiptera: Aleyrodidae) by Coenosia attenuata (Diptera: Muscidae) in greenhouse crops

We studied the predation behaviour of the "hunter fly" (Coenosia attenuata Stein) in the laboratory and greenhouse. In the laboratory, which was conducted at 25 degrees C at 60-80% RH, with a 16L : 8D photoperiod, we examined the functional response of this species to three different pests, namely the sciarid fly (Bradysia sp.), the tobacco whitefly (Bemisia tabaci) and the leaf miner Liriomyza trifolii. In the greenhouse, we studied the population dynamics of the predator and its prey on pepper and water melon crops grown in southern Spain. Adult hunter flies were found to exhibit a type I functional response to adult sciarid flies and whiteflies, but a type II response to adult leaf miners. The type II response was a result of the greater difficulty in capturing and handling leaf miners compared to the other two species. The dynamics of the predator-prey interaction in the greenhouse revealed that the predator specializes mainly on adult sciarids and that the presence of the other prey can be supplemental, but is never essential for survival of the predator; this, however, is crop-dependent. The results oil the dynamics of the predator-prey systems were obtained through a known population dynamics model with modifications.

Forensic acarology: an introduction

Mites can be found in all imaginable terrestrial habitats, in freshwater, and in salt water. Mites can be found in our houses and furnishings, on our clothes, and even in the pores of our skin-almost every single person carries mites. Most of the time, we are unaware of them because they are small and easily overlooked, and-most of the time-they do not cause trouble. In fact, they may even proof useful, for instance in forensics. The first arthropod scavengers colonising a dead body will be flies with phoretic mites. The flies will complete their life cycle in and around the corpse, while the mites may feed on the immature stages of the flies. The mites will reproduce much faster than their carriers, offering themselves as valuable timeline markers. There are environments where insects are absent or rare or the environmental conditions impede their access to the corpse. Here, mites that are already present and mites that arrive walking, through air currents or material transfer become important. At the end of the ninetieth century, the work of Jean Pierre M,gnin became the starting point of forensic acarology. M,gnin documented his observations in 'La Faune des Cadavres' [The Fauna of Carcasses]. He was the first to list eight distinct waves of arthropods colonising human carcasses. The first wave included flies and mites, the sixth wave was composed of mites exclusively. The scope of forensic acarology goes further than mites as indicators of time of death. Mites are micro-habitat specific and might provide evidential data on movement or relocation of bodies, or locating a suspect at the scene of a crime. Because of their high diversity, wide occurrence, and abundance, mites may be of great value in the analysis of trace evidence.