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ational Society of Ultrasound in Obstetrics and Gynecology.Understanding the genomic basis of adaptation is critical for understanding evolutionary processes and predicting how species will respond to environmental change. Spinner dolphins in the eastern tropical Pacific (ETP) present a unique system for studying adaptation. Within this large geographical region are four spinner dolphin ecotypes with weak neutral genetic divergence and no obvious barriers to gene flow, but strong spatial variation in morphology, behaviour and habitat. These ecotypes have large population sizes, which could reduce the effects of drift and facilitate selection. To identify genomic regions putatively under divergent selective pressures between ecotypes, we used genome scans with 8994 RADseq single nucleotide polymorphisms (SNPs) to identify population differentiation outliers and genotype-environment association outliers. Gene ontology enrichment analyses indicated that outlier SNPs from both types of analyses were associated with multiple genes involved in social behaviour and hippocampus development, including 15 genes associated with the human social disorder autism. Evidence for divergent selection on social behaviour is supported by previous evidence that these spinner dolphin ecotypes differ in mating systems and associated social behaviours. In particular, three of the ETP ecotypes probably have a polygynous mating system characterized by strong premating competition among males, whereas the fourth ecotype probably has a polygynandrous mating system characterized by strong postmating competition such as sperm competition. Our results provide evidence that selection for social behaviour may be an evolutionary force driving diversification of spinner dolphins in the ETP, potentially as a result of divergent sexual selection associated with different mating systems. Future studies should further investigate the potential adaptive role of the candidate genes identified here, and could probably find further signatures of selection using whole genome sequence data.
To determine which attributes of residency applicants were most commonly assessed by large and small animal American College of Veterinary Surgeons diplomates and to determine which evaluation methods were perceived to assess those attributes.
Online survey.
American College of Veterinary Surgeons board-certified surgeons as of March 2019.
An online survey was sent to eligible individuals. Respondents rated the importance of 23 attributes assessed by the Veterinary Internship and Residency Matching Program (VIRMP) application as well the usefulness of interviews, conversations with people knowledgeable with the applicants, and review of the VIRMP packet for evaluating each of these attributes. Responses were compared between large and small animal practitioners and between individuals involved in residency selection (supervisors) and individuals not involved in residency selection (nonsupervisors).
Surveys were completed by 221 individuals (14.6% response rate). Seventeen of the 23 attributes were considered important by most respondents. Grade point average (GPA) and class rank were used as screening tools by 73% and 65% of supervisors, respectively. Letters of reference (LOR) were ranked as the most important part of the VIRMP packet. Conversations with people knowledgeable with the applicant was the only method judged by most respondents to be appropriate to evaluate all 23 attributes. Responses were similar between large and small animal supervisors and nonsupervisors.
Respondents considered conversations with people knowledgeable with the applicant to be the most useful methods for assessing a resident applicant, but LOR, GPA, and class rank were also important.
Resident applicants and mentors can use this information to strengthen applications.
Resident applicants and mentors can use this information to strengthen applications.Invited for the cover of this issue is the group of Eva Rentschler at the Johannes Gutenberg University Mainz. The image depicts a puzzle that represents the metallacrown family with the gap for the chromium metallacrown complex. selleck chemical Read the full text of the article at 10.1002/chem.202004947.
Both detrusor underactivity (DU) and bladder outlet obstruction are the common causes of chronic urinary retention. Some novel treatment approaches focus on modulating micturition reflex and external urethral sphincter (EUS) function. This study used electrophysiologic (EP) studies to investigate the micturition reflex and EUS conditions of chronic urinary retention patients.
Sixty patients with urodynamic DU and chronic urinary retention were studied using (1) bulbocavernous reflex (BCR) by electric stimulation, (2) electromyography (EMG) of the EUS, and (3) nerve conduction velocity (NCV) studies of the pudendal nerve. The EP findings were analyzed in DU patients with different etiologies.
The BCR was positive in 41.7% of patients. In EMG studies, denervation, reinnervation, and reduced recruitment of the EUS were observed in 21.7%, 71.7%, and 88.3% patients, respectively. Decreased amplitude of pudendal nerve conduction in NCV studies was noted in 73.3% of patients. Patients with sacral neuropathy had a lower BCR positive rate (p = 0.001), a nonsignificant but higher denervation rate (p = 0.059) in EMG studies, and a higher rate of decreased amplitude in NCV (p = 0.011) than those without sacral neuropathy. Excluding patients with sacral neuropathy or diabetes mellitus, a high percentage of neurologic deficits was still detected in EP studies.
Chronic urinary retention patients with urodynamic DU not only have bladder dysfunction, but also potential neuropathy in the sacral reflexes, pudendal nerve, or urethral sphincter innervation. The neurologic deficits explored in EP studies may affect the decision-making around the therapy to restore the voiding function in DU.
Chronic urinary retention patients with urodynamic DU not only have bladder dysfunction, but also potential neuropathy in the sacral reflexes, pudendal nerve, or urethral sphincter innervation. The neurologic deficits explored in EP studies may affect the decision-making around the therapy to restore the voiding function in DU.
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