The Effects of Residency and Body Size on Contest Initiation and Outcome in the Territorial Dragon, Ctenophorus decresii

Empirical studies of the determinants of contests have been attempting to unravel the complexity of animal contest behaviour for decades. This complexity requires that experiments incorporate multiple determinants into studies to tease apart their relative effects. In this study we examined the complex contest behaviour of the tawny dragon (Ctenophorus decresii), a territorial agamid lizard, with the specific aim of defining the factors that determine contest outcome. We manipulated the relative size and residency status of lizards in contests to weight their importance in determining contest outcome. We found that size, residency and initiating a fight were all important in determining outcomes of fights. We also tested whether residency or size was important in predicting the status of lizard that initiated a fight. We found that residency was the most important factor in predicting fight initiation. We discuss the effects of size and residency status in context of previous studies on contests in tawny dragons and other animals. Our study provides manipulative behavioural data in support of the overriding effects of residency on initiation fights and winning them.This study was funded by the Australian Research Council (www.arc.gov.au), the School of Botany and Zoology, and ANU (www.anu.edu.au). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript

Health providers' reasons for participating in abortion care: a scoping review

Background: There is a global shortage of health providers in abortion care. Public discourse presents abortion providers as dangerous and greedy and links ‘conscience’ with refusal to participate. This may discourage provision. A scoping review of empirical evidence is needed to inform public perceptions of the reasons that health providers participate in abortion. Objective: The study aimed to identify what is known about health providers’ reasons for participating in abortion provision. Eligibility criteria: Studies were eligible if they included health providers’ reasons for participating in legal abortion provision. Only empirical studies were eligible for inclusion. Sources of evidence: We searched the following databases from January 2000 until January 2022: Medical Literature Analysis and Retrieval System Online, Excerpta Medica Database, Cumulative Index to Nursing and Allied Health Literature, ScienceDirect and Centre for Agricultural and Biosciences International Abstracts. Grey literature was also searched. Methods: Dual screening was conducted of both title/abstract and full-text articles. Health providers’ reasons for provision were extracted and grouped into preliminary categories based on the existing research. These categories were revised by all authors until they sufficiently reflected the extracted data. Results: From 3251 records retrieved, 68 studies were included. In descending order, reasons for participating in abortion were as follows: supporting women’s choices and advocating for women’s rights (76%); being professionally committed to participating in abortion (50%); aligning with personal, religious or moral values (39%); finding provision satisfying and important (33%); being influenced by workplace exposure or support (19%); responding to the community needs for abortion services (14%) and participating for practical and lifestyle reasons (8%). Conclusion: Abortion providers participated in abortion for a range of reasons. Reasons were mainly focused on supporting women’s choices and rights; providing professional health care; and providing services that aligned with the provider’s own personal, religious or moral values. The findings provided no evidence to support negative portrayals of abortion providers present in public discourse. Like conscientious objectors, abortion providers can also be motivated by conscience

How does genetic risk information for Lynch syndrome translate to risk management behaviours?

Background  There is limited research on why some individuals who have undergone predictive genetic testing for Lynch syndrome do not adhere to screening recommendations. This study aimed to explore qualitatively how Lynch syndrome non-carriers and carriers translate genetic risk information and advice to decisions about risk managment behaviours in the Australian healthcare system.  Methods  Participants of the Australasian Colorectal Cancer Family Registry who had undergone predictive genetic testing for Lynch syndrome were interviewed on their risk management behaviours. Transcripts were analysed thematically using a comparative coding analysis.  Results  Thirty-three people were interviewed. Of the non-carriers (n = 16), 2 reported having apparently unnecessary colonoscopies, and 6 were unsure about what population-based colorectal cancer screening entails. Of the carriers (n = 17), 2 reported they had not had regular colonoscopies, and spoke about their discomfort with the screening process and a lack of faith in the procedure’s ability to reduce their risk of developing colorectal cancer. Of the female carriers (n = 9), 2 could not recall being informed about the associated risk of gynaecological cancers.  Conclusion  Non-carriers and female carriers of Lynch syndrome could benefit from further clarity and advice about appropriate risk management options. For those carriers who did not adhere to colonoscopy screening, a lack of faith in both genetic test results and screening were evident. It is essential that consistent advice is offered to both carriers and non-carriers of Lynch syndrome

Institutional objection to abortion: a mixed-methods narrative review

Institutional objection (IO) occurs when institutions providing health care claim objector status and refuse to provide legally permissible health services such as abortion. IO may be regulated by sources including law, ethical codes and policies (including State and local/institutional policies). We conducted a mixed-methods narrative review of the empirical evidence exploring IO to abortion provision globally, to inform areas for further research. MEDLINE (Ovid), Embase (Ovid), CINAHL (EBSCO), Global Health (CAB Abstracts), ScienceDirect and Scopus were searched in August 2021 using keywords including ‘conscientious objection’, ‘faith-based organizations’, ‘religious hospitals’ and ‘abortion’. Eligible research focused on clinicians’ attitudes and experiences of IO to abortion. The 28 studies included in the review were from nine countries: United States (19), Chile (2), Turkey (1), Argentina (1), Australia (1), Colombia (1), Ghana (1), Poland (1) and South Africa (1). The analysis demonstrated that IO was claimed in a range of countries, despite different legislative and policy frameworks. There was strong evidence from the United States that clinicians in religious healthcare institutions were less likely to provide abortions and abortion referrals, and that training of future abortion providers was negatively affected by IO. Qualitative evidence from other countries showed that IO was claimed by secular as well as religious institutions, and individual conscientious objection could be used as a mechanism for imposing IO. Further research is needed to explore whether IO is morally justified, how decisions are made to claim IO, and on what grounds. Finally, appropriate models for regulating IO are needed to ensure the protection of women’s access to abortion. Such models could be informed by those used to regulate IO in other contexts, such as voluntary assisted dying

STUDIES IN PORPHYRIA

Porphyrin biosynthesis in mammalian skin and in skin obtained from patients with selected types of porphyria has been studied. Cutaneous porphyrinogenesis required the precursor δ-aminolevulinic acid (ALA) which, when added to murine, rat, and human skin in vitro, was rapidly converted to porphyrins. Total porphyrin content was quantitated by fluorescence assay, and spectral studies indicated that more than 80% of the porphyrin produced was protoporphyrin. The majority of skin porphyrinogenesis occurred in epidermis or in epidermal derivatives such as hair roots. Known inducers of hepatic δ-aminolevulinic acid synthetase (ALAS), the rate-limiting enzyme for heme biosynthesis, were not inducers when added to skin in vitro.Skin from patients with acute intermittent porphyria demonstrated a 43% decrease in cutaneous porphyrin production as compared to unaffected normals. This is consistent with the known deficiency of uroporphyrinogen synthetase that has been previously demonstrated in the liver and red blood cells of these patients. Porphyrinogenesis in skin of patients with porphyria cutanea tarda was not different from controls.These studies demonstrate that skin has the enzymatic capacity to synthesize porphyrins from added ALA and that cutaneous porphyrinogenesis from ALA is deficient in patients with acute intermittent porphyria

HIV knowledge, risk perception, and safer sex practices among female sex workers in Port Moresby, Papua New Guinea

Sex workers are considered a high-risk group for sexually transmitted infections, including human immunodeficiency virus (HIV), and are often targeted by prevention interventions with safer sex messages. The purpose of this study was to explore the extent to which knowledge of HIV and perception of risk influence safer sex practices among female sex workers (FSWs) in Port Moresby, Papua New Guinea. FSWs (n = 174) were recruited from 19 sites to participate in the study. Qualitative data were collected using semistructured interviews with FSWs (n = 142) through focus group discussions and (n = 32) individual interviews. In addition, quantitative data were collected from all FSWs using a short structured, demographic questionnaire. Data were analyzed using recurring themes and calculations of confidence intervals. Despite some common misperceptions, overall, most FSWs were basically aware of the risks of HIV and informed about transmission and prevention modalities but used condoms inconsistently. Most reported using condoms ‘sometimes’, almost one-sixth ‘never’ used condoms, only a fraction used condoms ‘always’ with clients, and none used condoms ‘always’ with regular sexual partners (RSPs). Among these FSWs, being knowledgeable about the risks, transmission, and prevention of HIV did not translate into safe sex. The findings suggest that certain contextual barriers to safer sex practices exist. These barriers could heighten HIV vulnerability and possibly may be responsible for infection in FSWs. Specific interventions that focus on improving condom self-efficacy in FSWs and simultaneously target clients and RSPs with safer sex messages are recommended

The ‘Institutional Lottery’: institutional variation in the processes involved in accessing late abortion in Victoria, Australia

Despite abortion being decriminalised in Victoria, Australia, access remains difficult, especially at later gestations. Institutions (i.e. health services) place restrictions on the availability of late abortions and/or require additional requirements to be satisfied (e.g. Hospital Termination Review Committee approval), as a consequence of local regulation (i.e. policies and processes determined at the institutional level). This paper reports on the results of 27 interviews with Victorian health professionals about late abortion processes and the operation of Termination Review Committees in Victorian health services, which were analysed thematically. The results reveal the operation of an ‘institutional lottery’ whereby patients' experiences in seeking late abortion services were variable and largely shaped by the institution(s) they found themselves in

Spontaneous Self-Constraint in Active Nematic Flows

Active processes drive and guide biological dynamics across scales -- from subcellular cytoskeletal remodelling, through tissue development in embryogenesis, to population-level bacterial colonies expansion. In each of these, biological functionality requires collective flows to occur while self-organized structures are protected; however, the mechanisms by which active flows can spontaneously constrain their dynamics to preserve structure have not previously been explained. By studying collective flows and defect dynamics in active nematic films, we demonstrate the existence of a self-constraint -- a two-way, spontaneously arising relationship between activity-driven isosurfaces of flow boundaries and mesoscale nematic structures. Our results show that self-motile defects are tightly constrained to viscometric surfaces -- contours along which vorticity and strain-rate balance. This in turn reveals that self-motile defects break mirror symmetry when they move along a single viscometric surface, in contrast with expectations. This is explained by an interdependence between viscometric surfaces and bend walls -- elongated narrow kinks in the orientation field. Although we focus on extensile nematic films, numerical results show the constraint holds whenever activity leads to motile half-charge defects. This mesoscale cross-field self-constraint offers a new framework for tackling complex 3D active turbulence, designing dynamic control into biomimetic materials, and understanding how biological systems can employ active stress for dynamic self-organization.Comment: 10 pages, 4 figure

Working with families affected by mental distress: stakeholders' perceptions of mental health nurses educational needs

Family and informal caregivers provide a substantial amount of care and support to people who experience mental health problems. The aim of this study was to explore mental health nurses’, students’ and service users’ perceptions of the knowledge, skills and attitudes that are required by mental health nurses to work with families and carers using a qualitative methodology. Three themes emerged from the data: Knowledge of the family and how mental distress affects the family; Working with the family – support and education and Valuing the role of the family. The three themes demonstrate the complexity of preparing mental health nurses to work with families and carers and the paper offers recommendations about how this might be achieved