Patterns of growth, mortality, and size of the tropical damselfish Acanthochromis polyacanthus across the continental shelf of the Great Barrier Reef

Age-based analyses were used to demonstrate consistent differences in growth between populations of Acanthochromis polyacanthus (Pomacentridae) collected at three distance strata across the continental shelf (inner, mid-, and outer shelf) of the central Great Barrier Reef (three reefs per distance stratum). Fish had significantly greater maximum lengths with increasing distance from shore, but fish from all distances reached approximately the same maximum age, indicating that growth is more rapid for fish found on outer-shelf reefs. Only one fish collected from inner-shelf reefs reached >100 mm SL, whereas 38−67% of fish collected from the outer shelf were >100 mm SL. The largest age class of adult-size fish collected from inner and mid-shelf locations comprised 3−4 year-olds, but shifted to 2-year-olds on outer-shelf reefs. Mortality schedules (Z and S) were similar irrespective of shelf position (inner shelf: 0.51 and 60.0%; mid-shelf: 0.48 and 61.8%; outer shelf: 0.43 and 65.1%, respectively). Age validation of captive fish indicated that growth increments are deposited annually, between the end of winter and early spring. The observed cross-shelf patterns in adult sizes and growth were unlikely to be a result of genetic differences between sample populations because all fish collected showed the same color pattern. It is likely that cross-shelf variation in quality and quantity of food, as well as in turbidity, are factors that contribute to the observed patterns of growth. Similar patterns of cross-shelf mortality indicate that predation rates varied little across the shelf. Our study cautions against pooling demographic parameters on broad spatial scales without consideration of the potential for cross-shelf variabi

Molecular dynamics simulations of the interactions of potential foulant molecules and a reverse osmosis membrane

Reverse osmosis (RO) is increasingly one of the most common technologies for desalination worldwide. However, fouling of the membranes used in the RO process remains one of the main challenges. In order to better understand the molecular basis of fouling the interactions of a fully atomistic model of a polyamide membrane with three different foulant molecules, oxygen gas, glucose and phenol, are investigated using molecular dynamics simulations. In addition to unbiased simulations, umbrella sampling methods have been used to calculate the free energy profiles of the membrane-foulant interactions. The results show that each of the three foulants interacts with the membrane in a different manner.It is found that a build up of the two organic foulants, glucose and phenol, occurs at the membrane-saline solution, due to the favourable nature of the interaction in this region, and that the presence of these foulants reduces the rate of flow of water molecules over the membrane-solution interface. However, analysis of the hydrogen bonding shows that the origin of attraction of the foulant for the membrane differs. In the case of oxygen gas the simulations show that a build up of gas within the membrane is likely, although, no deterioration in the membrane performance was observed

Surviving in Manchester: Naratives on Movement from the Men's Room

The Men’s Room is an arts and social care agency that works creatively with young men, offering them opportunities to get involved in arts projects whilst accessing support for challenges they may be facing in their lives. The project engages different constituencies of young men experiencing severe and multiple disadvantage, including those involved with sex work or with experience of sexual exploitation, and those with experience of homelessness and/or the criminal justice system. ‘Surviving in Manchester’ was commissioned by the Lankelly Chase Foundation (LCF) and aimed to explore young men’s routes into the Men’s Room as well as how they defined successful service provision. The research included ethnographic fieldwork, walking tours led by young men to sites that they connected with their survival in the city, and a Visual Matrix conducted with staff and volunteers. It argues that the relational approach of the Men’s Room is a key organisational strength. This approach combines informal and formal support, unconditional acceptance, clear ground rules, and gauging of supportive interventions in ways that are sensitive to the young men’s readiness and ability to ‘move on’. It also includes valuable opportunities for social gathering, creative expression and public storytelling and image-making that extend the artistic and imaginative capacities of the young men and celebrate their abilities and experiences

Models of Dementia Care: Person-Centred, Palliative and Supportive Integration of Hospice and Hospital-Based Palliative Care

The intention of this paper is to stimulate debate concerning how we should think about dementia as a condition at the end of life and how, therefore, we should plan and provide care for people with dementia and for their families. It considers questions of whether there is a need for dementia specific palliative care services and when discussions about end of life care should begin. It is about our models of care and how we put them into practice

End-of-life care and dementia

In the UK, research continues to confirm that people with certain chronic illnesses, such as chronic lung disease and cardiac failure, represent the ‘disadvantaged dying’ compared to those with terminal cancer. But what is the situation for people dying with advanced dementia and what is the experience of their carers? Practical guidance for clinicians is scarce. In Standard 7 of the National Service Framework for Older People, which covers mental health, there is mention neither of how care should be provided nor of how patient choice should be ensured for people with dementia at the end of life. In the UK, 5% of the population aged 65 and over and 20% of those aged 80 and over have dementia similar prevalence figures are found in the USA. Current predictions suggest that the number of people with dementia will increase by 40% by 2026 and will double by 2050. The increased demand for end-of-life care for people with dementia will be associated with major social and economic costs, but what is the current standard of such care? How can the quality be improved? And how should future services be configured to cope with this increasing need? In this paper, we review current knowledge around end-of-life care in dementia, discuss the clinical challenges and ethical dilemmas presented to carers, consider the difficulties in delivering such care and suggest practical approaches to improve the quality of such care

Improving professional practice in the disclosure of a diagnosis of dementia : a modeling experiment to evaluate a theory-based intervention

The original publication is available at www.springerlink.com.Peer reviewedPostprin