Energy allocation and behaviour in the growing broiler chicken

Broiler chickens are increasingly at the forefront of global meat production but the consequences of fast growth and selection for an increase in body mass on bird health are an ongoing concern for industry and consumers. To better understand the implications of selection we evaluated energetics and behaviour over the 6-week hatch-to-slaughter developmental period in a commercial broiler. The effect of posture on resting metabolic rate becomes increasingly significant as broilers grow, as standing became more energetically expensive than sitting. The proportion of overall metabolic rate accounted for by locomotor behaviour decreased over development, corresponding to declining activity levels, mean and peak walking speeds. These data are consistent with the inference that broilers allocate energy to activity within a constrained metabolic budget and that there is a reducing metabolic scope for exercise throughout their development. Comparison with similarly sized galliforms reveals that locomotion is relatively energetically expensive in broilers

On the role of discipline-related self-concept in deep and surface approaches to learning among university students

The current research examined the role that students' discipline-related self-concepts may play in their deep and surface approaches to learning, their overall learning outcomes, and continued engagement in the discipline itself. Using a cross-lagged panel design of first-year university psychology students, a causal path was observed in which students' Semester 1 deep approach to learning positively predicted their Semester 2 psychology-student social identification; this relationship was mediated by students' actual Semester 1 learning. Moreover, relatively high levels of Semester 2 psychology-student social identification led to a desire for further engagement in the discipline through an enhanced intent to continue their psychology studies. In contrast, discipline-related self-concept was not observed to act as a precursor to learning approaches. Overall, the current data provide clear evidence not only for the validity of the deep learning approach construct, but for the theoretical claims associating a deep learning approach with an impact on self-concept, and the educational value of encouraging a deep learning approach both for short-term academic performance and for continuing motivation to engage in the discipline. © 2012 Springer Science+Business Media B.V

Young men with physical disabilities struggle for digital sex(uality)

Previous studies have found that people with disabilities experience sexual othering in offline contexts. However, little is known about how they engage in sexual practices online. This chapter advances arguments on sexual othering and digital media use for sex(uality) by young people with physical disabilities. It draws on an ethnographic study conducted in a special school in the UK. The chapter explores how two physically disabled young men evade parental mediation in the home to find, view, and explore sex(uality) online. When digital media technologies are mediated through restrictive parental mediation, young people with physical disabilities can encounter an added layer to the sexual othering process. This is further complicated when their disability intersects with gender and sexuality