Ground-based survey methods both overestimate and underestimate the abundance of suitable tree-cavities for the endangered Swift Parrot

Most cavity-dependent species select tree-cavities with a narrow range of characteristics so that only a small subset of available cavities may be suitable for any species. Most surveys for tree-cavities are done from the ground using binoculars to reduce effort, but this technique is prone to error. These errors are likely to contribute to the loss of the cavity resource when used to inform conservation efforts for cavity-dependent species. The Swift Parrot (Lathamus discolor) is an endangered migratory bird threatened by ongoing removal of cavity-bearing trees by production forestry. We climbed trees with cavities used for nesting by Swift Parrots and determined that they prefer cavities with small entrances, deep chambers and wide floors. Such cavities are rare and occur in large trees that support higher than average numbers of tree-cavities. Importantly, cavities used by Swift Parrots were also likely to be both overestimated and underestimated using ground-based surveys, and without calibration by climbing, the size and direction of survey error could not be determined. We conclude that the most effective way to gain detailed information about the characteristics and abundance of tree-cavities is to climb a representative sample of trees to calibrate ground-based methods for a specific ecosystem.

Population biology of swift (Apus apus) ectoparasites in relation to host reproductive success

1We censused ectoparasite populations of adult and nestling swifts over the course of the host's breeding season. Nearly all of the birds were infested with chewing lice and two-thirds of the nests were infested with louse flies. Feather mites were observed but not quantified.2Lice and louse flies both showed aggregated distributions among hosts. Louse eggs, hatched lice and adult louse flies had negative binomial distributions, whereas the aggregated distribution of louse fly pupae was not adequately described by negative binomial or Poisson models.3Transmission of lice from parents to offspring was documented. A comparison of the age structure of lice on parents and offspring indicated that most transmission was by nymphal lice.4Host reproductive success and survival appeared to be independent of the number of lice or louse flies. Neither parasite correlated with the number, body mass, or date of fledging of young birds, nor with the overwinter survival of adults. We caution, however, that experimental manipulations of parasite load are required for a definitive test of the impact of ectoparasites on evolutionary fitness components.

It starts with the parents and ends with the parents

Alcohol is the most popular recreational drug in Australia. Despite the fact that many people gain enjoyment from alcohol related industries, alcohol is also implicated in much personal trauma and social damage. Parents play a key role in influencing alcohol use and driver behaviour in young people. The aim of this study was to gain an understanding of the attitudes and concerns of parents in Melbourne in relation to their teenage children's use of alcohol and how they educate and/or provide role models for their adolescents with respect to alcohol usage. A convenience sample of parents with adolescent children participated in focus groups. Parents described patterns of alcohol use and perceived influences on consumption. They reported that they wanted to create safe environments for adolescents to consume alcohol but that they needed more support and information on which to base these decisions. There i, an opportunity for public health policy makers to specifically address parents and enhance their role in alcohol related road safety.<br />

Developing a web-based information resource for palliative care : an action-research inspired approach

<b>Background :</b> General Practitioners and community nurses rely on easily accessible, evidence-based online information to guide practice. To date, the methods that underpin the scoping of user-identified online information needs in palliative care have remained under-explored. This paper describes the benefits and challenges of a collaborative approach involving users and experts that informed the first stage of the development of a palliative care website.<br /><br /><b>Method :</b> The action research-inspired methodology included a panel assessment of an existing palliative care website based in Victoria, Australia; a pre-development survey (n = 197) scoping potential audiences and palliative care information needs; working parties conducting a needs analysis about necessary information content for a redeveloped website targeting health professionals and caregivers/patients; an iterative evaluation process involving users and experts; as well as a final evaluation survey (n = 166).<br /><br /><b>Results : </b>Involving users in the identification of content and links for a palliative care website is time-consuming and requires initial resources, strong networking skills and commitment. However, user participation provided crucial information that led to the widened the scope of the website audience and guided the development and testing of the website. The needs analysis underpinning the project suggests that palliative care peak bodies need to address three distinct audiences (clinicians, allied health professionals as well as patients and their caregivers).<br /><b><br />Conclusion :</b> Web developers should pay close attention to the content, language, and accessibility needs of these groups. Given the substantial cost associated with the maintenance of authoritative health information sites, the paper proposes a more collaborative development in which users can be engaged in the definition of content to ensure relevance and responsiveness, and to eliminate unnecessary detail. Access to volunteer networks forms an integral part of such an approach.<br />

Intranet and internet uptake and usage within UK building surveying practices. A user based evaluation of advantages and disadvantages

The &lsquo;single most important technological discovery since the birth of the p.c.&rsquo;, (Gates, 1996). The swift increase in Internet utilisation within businesses and surveying has changed working methods within UK based Surveying practices. User numbers expanded rapidly since the early 1990&rsquo;s and estimates place a figure of 150 million internet users globally (www.Yahoo.com, 2000). Sloan and Kee Low (2000) established that &lsquo;e-commerce&rsquo; is a revolutionary way of trading and conducting business activities. There are opportunities for surveying practices including, reducing communication time, increasing revenues from new and existing sources, enhanced client satisfaction and competitive advantage (Cronin, 1996). Others (Dixon, 1998) perceive threats, such as &lsquo;disintermediation&rsquo;, to the traditional role of the surveyor.<br /><br />This research examined the levels of internet and intranet access within the UK Building and Quantity Surveying practices and corporate firms to establish how the internet has affected working methods and client requirements. The research method comprised a qualitative approach using an email and postal questionnaire survey of a random sample of practices. The questionnaire findings formed the basis of semi structured interviews conducted with senior management of large practices to gain a deeper understanding of the issues identified within the survey.<br /><br />Data analysis revealed the traditional role of the surveyor as a broker of information may be under threat in the long term. Generally levels of internet access in the sample exceed that of general business levels (Dti, 2000) with the largest growth pre 1997. The perceived advantages and barriers to Intranet and Internet usage were identified by the research.<br />

Nietzsche as 'Europe's Buddha' and 'Asia's superman'

Nietzsche represents in an interesting way the well-worn Western approach to Asian philosophical and religious thinking: initial excitement, then neglect by appropriation, and swift rejection when found to be incompatible with one&rsquo;s own tradition, whose roots are inexorably traced back to the &lsquo;ancient&rsquo; Greeks. Yet, Nietzsche&rsquo;s philosophical critique and methods - such as &lsquo;perspectivism&rsquo; - offer an instructive route through which to better understand another tradition even if the sole purpose of this exercise is to perceive one&rsquo;s own limitations through the eyes of the other: a self-destruktion of sorts. To help correct this shortcoming and begin the long overdue task of even-handed dialogue - or contemporary comparative philosophy - we will be served well by looking at Nietzsche&rsquo;s mistakes, which in turn informed the tragic critic of the West of the last century, Martin Heidegger. We may learn here not to cast others in one&rsquo;s own troubled image; and not to reverse cultural icons: Europe&rsquo;s Superman, and Asia&rsquo;s Buddha. <br />

Recreational substance use among elite Australian athletes

<b>Introduction and Aims</b>.The study aimed to investigate the prevalence of illicit drug use among elite Australian athletes with a focus upon cannabis, ecstasy, meth/amphetamine, cocaine, GHB and ketamine; explore perceptions concerning the extent of drug use among this group; ascertain opinions regarding specific drugs of concern; and investigate predictors of recent drug use. <br /><b>Design and Methods.</b> Data were taken from surveys with 974 elite athletes. <br /><b>Results</b>. One-third of the sample had been offered or had the opportunity to use illicit drugs in the past year; despite this, the self-reported prevalence of all six drugs under investigation was lower than that reported by the general population. Sixteen per cent of athletes believed that there was a drug of concern in their sport, with ecstasy, cocaine and alcohol being nominated. Knowing other athletes who use illicit drugs, being offered or having the opportunity to use drugs and identifying as a &lsquo;full-time athlete&rsquo; were significant predictors of recent drug use. <br /><b>Discussion and Conclusions</b>. The present study found that one-third of the athlete sample had been offered or had the opportunity to use illicit drugs in the past year; despite this, there was low self-reported drug use. Despite media discussion regarding alcohol use in sport, alcohol was nominated as a drug of concern only by a small proportion of athletes, and further research investigating this issue may be warranted.

Elite athletes' perceptions of the effects of illicit drugs use on athletic performance

<b>Objective:</b> To investigate the perceived risks and benefits that elite athletes associate with illicit drugs and their beliefs concerning the effects of recreational drug use on athletic performance.<br /><br /><b>Design:</b> Self-administered survey.<br /><br /><b>Participants</b>: Nine hundred seventy-four elite athletes (mean age, 23 years; range, 18-30 years) were recruited from 8 national sporting organizations in Australia and the Australian Institute of Sport.<br /><br /><b>Interventions:</b> Participants completed a self-administered survey that included questions exploring participants&rsquo; perceptions regarding the effects of illicit drug use on physical performance.<br /><br /><b>Setting:</b> National sporting organization meetings or competitions.<br /><br /><b>Main Outcome Measures:</b> The main outcome measure was risk perception on athletic performance associated with illicit drug use.<br /><br /><b>Results: </b>The majority of athletes believed that illicit drug use would impact negatively on athletic performance. The main perceived effects of illicit drugs on athletic performance were physical and mental functioning. A minority of athletes indicated that drug use would not impact on physical performance when taken during the offseason or in moderation.<br /><br /><b>Conclusions: </b>The main risks perceived in association with illicit drug use were short-term consequences, such as physical and mental functioning, rather than long-term health consequences. The current findings may contribute to the development of harm reduction strategies that communicate drug-related consequences to elite athletes in an appropriate and effective manner.<br /><br /><br />

Anthropogenic selection enhances cancer evolution in Tasmanian devil tumours

The Tasmanian Devil Facial Tumour Disease (DFTD) provides a unique opportunity to elucidate the long-term effects of natural and anthropogenic selection on cancer evolution. Since first observed in 1996, this transmissible cancer has caused local population declines by &gt;90%. So far, four chromosomal DFTD variants (strains) have been described and karyotypic analyses of 253 tumours showed higher levels of tetraploidy in the oldest strain. We propose that increased ploidy in the oldest strain may have evolved in response to effects of genomic decay observed in asexually reproducing organisms. In this study, we focus on the evolutionary response of DFTD to a disease suppression trial. Tumours collected from devils subjected to the removal programme showed accelerated temporal evolution of tetraploidy compared with tumours from other populations where no increase in tetraploid tumours were observed. As ploidy significantly reduces tumour growth rate, we suggest that the disease suppression trial resulted in selection favouring slower growing tumours mediated by an increased level of tetraploidy. Our study reveals that DFTD has the capacity to rapidly respond to novel selective regimes and that disease eradication may result in novel tumour adaptations, which may further imperil the long-term survival of the world's largest carnivorous marsupial.

Young adult sequelae of adolescent cannabis use: an integrative analysis

&nbsp;Background: Debate continues about the consequences of adolescent cannabis use. Existing data are limited in statistical power to examine rarer outcomes and less common, heavier patterns of cannabis use than those already investigated; furthermore, evidence has a piecemeal approach to reporting of young adult sequelae. We aimed to provide a broad picture of the psychosocial sequelae of adolescent cannabis use. Methods: We integrated participant-level data from three large, long-running longitudinal studies from Australia and New Zealand: the Australian Temperament Project, the Christchurch Health and Development Study, and the Victorian Adolescent Health Cohort Study. We investigated the association between the maximum frequency of cannabis use before age 17 years (never, less than monthly, monthly or more, weekly or more, or daily) and seven developmental outcomes assessed up to age 30 years (high-school completion, attainment of university degree, cannabis dependence, use of other illicit drugs, suicide attempt, depression, and welfare dependence). The number of participants varied by outcome (N=2537 to N=3765). Findings: We recorded clear and consistent associations and dose-response relations between the frequency of adolescent cannabis use and all adverse young adult outcomes. After covariate adjustment, compared with individuals who had never used cannabis, those who were daily users before age 17 years had clear reductions in the odds of high-school completion (adjusted odds ratio 0&middot;37, 95% CI 0&middot;20-0&middot;66) and degree attainment (0&middot;38, 0&middot;22-0&middot;66), and substantially increased odds of later cannabis dependence (17&middot;95, 9&middot;44-34&middot;12), use of other illicit drugs (7&middot;80, 4&middot;46-13&middot;63), and suicide attempt (6&middot;83, 2&middot;04-22&middot;90). Interpretation: Adverse sequelae of adolescent cannabis use are wide ranging and extend into young adulthood. Prevention or delay of cannabis use in adolescence is likely to have broad health and social benefits. Efforts to reform cannabis legislation should be carefully assessed to ensure they reduce adolescent cannabis use and prevent potentially adverse developmental effects. Funding: Australian Government National Health and Medical Research Council. &copy; 2014 Elsevier Ltd.