Sexual Selection in Lekking Sage Grouse: Phenotypic Correlates of Male Mating Success

Mate choice cues in sage grouse were reinvestigated by analyzing relationships between male mating success and a range of suggested cues. Display cues were implicated by significant relationships between mating status (whether or not a male mated) and lek attendance, display rate (corrected for effects of female proximity and time of day) and an acoustic component related to temporal and frequency measures of a whistle emitted during the strut display. Although display rate and the acoustic component were intercorrelated, both exerted significant partial effects on mating success in multivariate analyses. These display measures also differed significantly between males. In contrast, mating success was not significantly related to measures of territory characteristics, including size and proximity to the lek center, or to body size. These results resolve discrepancies between previous studies and provide a basis for experimental analysis of the role of female choice in this lek system

A decision theoretic framework for selecting source location privacy aware routing protocols in wireless sensor networks

Source location privacy (SLP) is becoming an important property for a large class of security-critical wireless sensor network applications such as monitoring and tracking. Many routing protocols have been proposed that provide SLP, all of which provide a trade-off between SLP and energy. Experiments have been conducted to gauge the performance of the proposed protocols under different network parameters such as noise levels. As that there exists a plethora of protocols which contain a set of possibly conflicting performance attributes, it is difficult to select the SLP protocol that will provide the best trade-offs across them for a given application with specific requirements. In this paper, we propose a methodology where SLP protocols are first profiled to capture their performance under various protocol configurations. Then, we present a novel decision theoretic procedure for selecting the most appropriate SLP routing algorithm for the application and network under investigation. We show the viability of our approach through different case studies

Factors shaping the ontogeny of vocal signals in a wild parrot

Parrots rely heavily on vocal signals to maintain their social and mobile lifestyles. We studied vocal ontogeny in nests of wild green-rumped parrotlets (Forpus passerinus) in Venezuela. We identified three successive phases of vocal signaling that corresponded closely to three independently derived phases of physiological development. For each ontogenetic phase, we characterized the relative importance of anatomical constraints, motor skills necessary for responding to specific contexts of the immediate environment, and the learning of signals that are necessary for adult forms of communication. We observed shifts in the relative importance of these three factors as individuals progressed from one stage to the next; there was no single fixed ratio of factors that applied across the entire ontogenetic sequence. The earliest vocalizations were short in duration, as predicted from physical constraints and under-developed motor control. Calls became longer and frequency modulated during intermediate nestling ages in line with motor skills required for competitive begging. In the week before fledging, calls drastically shortened in accordance with the flight-constrained short durations of adult contact calls. The latter constraints were made evident by the demonstrated links between wing-assisted incline running, a widespread prelude to avian flight, just before the shift from long-duration begging calls to short-duration contact calls. At least in this species, the shifting emphases of factors at different ontogenetic stages precluded the morphing of intermediate-stage begging calls into adult contact calls; as shown previously, the latter are influenced by sample templates provided by parents

SELF HARM AND SUICIDALITY: AN AUDIT OF FOLLOW-UP IN PRIMARY CARE

Deliberate self harm is the strongest predictor of completed suicide. Primary care is often the entry point for those presenting with self harm and suicidality and so the primary care follow-up of such patients should include risk assessment for repeated self harm and completed suicide. This is of particular importance in patients at high risk for suicide, such as those with Bipolar Affective Disorder. This audit makes recommendations for the average UK GP Teaching Practice based on standards from the NICE guidelines relating to the prevalence, timing and content of follow-up in primary care of those patients who present with self harm or suicidality in the practice population

SELF HARM AND SUICIDALITY: AN AUDIT OF FOLLOW-UP IN PRIMARY CARE

Deliberate self harm is the strongest predictor of completed suicide. Primary care is often the entry point for those presenting with self harm and suicidality and so the primary care follow-up of such patients should include risk assessment for repeated self harm and completed suicide. This is of particular importance in patients at high risk for suicide, such as those with Bipolar Affective Disorder. This audit makes recommendations for the average UK GP Teaching Practice based on standards from the NICE guidelines relating to the prevalence, timing and content of follow-up in primary care of those patients who present with self harm or suicidality in the practice population

Hearing and vocalizations in the orange-fronted conure (Aratinga canicularis

The auditory sensitivities of the orange-fronted conure (Aratinga canicularis) were examined in relation to the spectral characteristics of its vocalizations. Absolute thresholds, masked thresholds, frequency difference limens, and intensity difference limens for pure tones were obtained using psychoacoustic techniques. In general, hearing abilities are similar to those found in many avian auditory generalists. One exception is the unusually low critical ratio (masked threshold) between 2.0 and 4.0 kHz, similar to that previously found in the budgerigar (Melopsittacus undulatus). These auditory sensitivities were compared with average spectra for (a) contact calls and (b) a general sample of vocalizations recorded from wild birds. The spectral regions of both greatest vocal energy and best auditory sensitivity were between 2.0 and 5.0 kHz

‘My mentor didn't speak to me for the first four weeks’: Perceived unfairness experienced by nursing students in clinical practice settings

Aims and Objectives To explore the perceived unfairness experienced by student nurses during their undergraduate clinical placements. Background It is important that student nurses feel supported by practice staff during their clinical placement education experiences. However, it has been reported that learners can feel ignored, unsupported and bullied by others in the clinical environment and this has a detrimental effect on their learning. It is important to understand the student nurse perspective and explore ways in which their feelings of belongingness might be enhanced in the clinical area. Design A descriptive narrative approach was utilised to explore the qualitative data generated by the survey and interviews. Limited closed-question survey data were acquired to explore a selection of quantified survey responses about placements and mentorship. Methods A survey was conducted with 1425 student nurses from adult and mental health degree nursing pathways, across 9 institutions in the North West of England, UK. Unstructured interviews were undertaken with 22 student nurses from across these 9 institutions. The data generated from both methods (free text survey responses and interview) were thematically analysed. Results There were times when student nurses felt that they had been treated unfairly by various members of the health care team during their clinical placements. Unfairness was related to being ignored and unsupported or being used as an ‘extra pair of hands’ and having their supernumerary status ignored. Student nurses want to have feelings of belongingness in the clinical area and value enthusiasm for teaching from mentors. Certain positive mentor qualities were identified through the data in this study. These have been used to inform a tiered model of mentorship, to inform future thinking about student nurse education. Conclusion Student nurses can feel like they are being treated unfairly in the clinical area in numerous ways. Identifying ways in which mentorship practice can be developed to adequately support education is important. This can lead to satisfaction and development on both sides of the student/educator relationship. Relevance to Practice Exploring student nurse perceptions of their learning is important when attempting to enhance educational practice in the clinical setting

Viscoelastic Testing and Coagulopathy of Traumatic Brain Injury

A unique coagulopathy often manifests following traumatic brain injury, leading the clinician down a difficult decision path on appropriate prophylaxis and therapy. Conventional coagulation assays—such as prothrombin time, partial thromboplastin time, and international normalized ratio—have historically been utilized to assess hemostasis and guide treatment following traumatic brain injury. However, these plasma-based assays alone often lack the sensitivity to diagnose and adequately treat coagulopathy associated with traumatic brain injury. Here, we review the whole blood coagulation assays termed viscoelastic tests and their use in traumatic brain injury. Modified viscoelastic tests with platelet function assays have helped elucidate the underlying pathophysiology and guide clinical decisions in a goal-directed fashion. Platelet dysfunction appears to underlie most coagulopathies in this patient population, particularly at the adenosine diphosphate and/or arachidonic acid receptors. Future research will focus not only on the utility of viscoelastic tests in diagnosing coagulopathy in traumatic brain injury, but also on better defining the use of these tests as evidence-based and/or precision-based tools to improve patient outcomes