Using Spatial Capture-Recapture to Estimate Density of Roosevelt Elk in Western Oregon

Spatial capture-recapture (SCR) is employed for estimating abundance and density of species, particularly those that are cryptic or solitary, and evaluating how population density varies with habitat. However, it is uncertain whether estimates are biased when applied to species that aggregate, such as elk (Cervus canadensis). Wildlife managers in the Pacific Northwest lack a reliable method to estimate abundance and density of Roosevelt elk (C. c. roosevelti), as that subspecies frequents dense forests and occurs singly or in groups sometimes exceeding 100 individuals. Hitherto, decision-making in elk management has relied on visual counts as population indices, yet such counts are potentially biased because group size influences detection and observers are unlikely to detect individuals in forests. We employed non-invasive sampling and spatial capture-recapture (SCR) modeling to estimate Roosevelt elk population density in two Oregon wildlife management units (WMUs), Tioga and McKenzie, and examined how density varied with habitat or land ownership type. We imposed a grid across both WMUs, basing cell size on elk home ranges that we estimated in these habitats from existing telemetry data, and stratified sampling by land ownership and nutrition quality, calculated from U.S. Forest Service Westside Elk Nutrition models. We randomly selected cells in each stratum and placed three, 2-km transects within each to facilitate recaptures. We sampled transects once in March to June 2018 and again in 2019 by walking a pre-determined bearing and searching for elk feces, tracking distance to control for variation in effort. We genotyped samples at 9 microsatellite loci and one sex-determining marker to identify individuals, then created a capture history for each individual. We evaluated a suite of SCR models to assess the effects of covariates relating to habitat type, terrain, precipitation, human activity, and sampling effort on elk population density and probability of detection. We applied the models to the capture histories, tested for the influence of aggregation on density estimates, and estimated mean elk population density for 2018 and 2019 at 0.80 and 0.20 individuals/km2 in Tioga and McKenzie, respectively. Our models performed well in areas with high elk density, deviating from true density 16% of the time. In contrast, our models deviated from true density 54% of the time when applied to areas with low elk density, indicating sampling intensity would need to be increased to obtain adequate recaptures. We did not find evidence that aggregation of individuals influenced our estimates of density in this system. Our results indicate that effort and precipitation influenced the probability of detecting an individual, and distance to forage/cover edge, distance to roads, percent slope, distance to crops, and precipitation influenced our estimates of elk population density. Overall, our models predicted fewer elk on federal lands, indicating that public recreational opportunities involving elk such as hunting and wildlife viewing may be more limited on public lands. Our methodology provides a framework for managers to develop and implement surveys to reliably estimate elk density in forested landscapes

The Right To Remain Silent In New Orleans: The Role Of Non-Politically Accountable Charter School Boards In The School-To-Prison Pipeline

Residents and officials of many cities may fantasize about the possibilities of rebuilding their cities from scratch

Cross-sectional associations between variations in ankle shape by statistical shape modeling, injury history, and race : the Johnston County Osteoarthritis Project

Rheumatology Research Foundation Medical Student Preceptorship Award (Lateef/Nelson), NIAMS K23 AR061406 (Nelson); NIH/NIAMS P60AR064166 and U01DP003206 (Jordan/Renner), NIH/NIAMS R01AR067743 (Golightly). The funders had no role in study design; collection, analysis, or interpretation of data; writing the manuscript or the decision to submit for publication.Peer reviewedPublisher PD

Influence of coral and algal exudates on microbially mediated reef metabolism.

Benthic primary producers in tropical reef ecosystems can alter biogeochemical cycling and microbial processes in the surrounding seawater. In order to quantify these influences, we measured rates of photosynthesis, respiration, and dissolved organic carbon (DOC) exudate release by the dominant benthic primary producers (calcifying and non-calcifying macroalgae, turf-algae and corals) on reefs of Mo'orea French Polynesia. Subsequently, we examined planktonic and benthic microbial community response to these dissolved exudates by measuring bacterial growth rates and oxygen and DOC fluxes in dark and daylight incubation experiments. All benthic primary producers exuded significant quantities of DOC (roughly 10% of their daily fixed carbon) into the surrounding water over a diurnal cycle. The microbial community responses were dependent upon the source of the exudates and whether the inoculum of microbes included planktonic or planktonic plus benthic communities. The planktonic and benthic microbial communities in the unamended control treatments exhibited opposing influences on DO concentration where respiration dominated in treatments comprised solely of plankton and autotrophy dominated in treatments with benthic plus plankon microbial communities. Coral exudates (and associated inorganic nutrients) caused a shift towards a net autotrophic microbial metabolism by increasing the net production of oxygen by the benthic and decreasing the net consumption of oxygen by the planktonic microbial community. In contrast, the addition of algal exudates decreased the net primary production by the benthic communities and increased the net consumption of oxygen by the planktonic microbial community thereby resulting in a shift towards net heterotrophic community metabolism. When scaled up to the reef habitat, exudate-induced effects on microbial respiration did not outweigh the high oxygen production rates of benthic algae, such that reef areas dominated with benthic primary producers were always estimated to be net autotrophic. However, estimates of microbial consumption of DOC at the reef scale surpassed the DOC exudation rates suggesting net consumption of DOC at the reef-scale. In situ mesocosm experiments using custom-made benthic chambers placed over different types of benthic communities exhibited identical trends to those found in incubation experiments. Here we provide the first comprehensive dataset examining direct primary producer-induced, and indirect microbially mediated alterations of elemental cycling in both benthic and planktonic reef environments over diurnal cycles. Our results highlight the variability of the influence of different benthic primary producers on microbial metabolism in reef ecosystems and the potential implications for energy transfer to higher trophic levels during shifts from coral to algal dominance on reefs

Neural Processing of Repetition and Non-Repetition Grammars in 7- and 9-Month-Old Infants

An essential aspect of infant language development involves the extraction of meaningful information from a continuous stream of auditory input. Studies have identified early abilities to differentiate auditory input along various dimensions, including the presence or absence of structural regularities. In newborn infants, frontal and temporal regions were found to respond differentially to these regularities (Gervain et al., 2008), and in order to examine the development of this abstract rule learning we presented 7- and 9-month-old infants with syllables containing an ABB pattern (e.g., “balolo”) or an ABC pattern (e.g., “baloti”) and measured activity in left and right lateral brain regions using near-infrared spectroscopy (NIRS). While prior newborn work found increases in oxyhemoglobin (oxyHb) activity in response to ABB blocks as compared to ABC blocks in anterior regions, 7- and 9-month-olds showed no differentiation between grammars in oxyHb. However, changes in deoxyhemoglobin (deoxyHb) pointed to a developmental shift, whereby 7-month-olds showed deoxyHb responding significantly different from zero for ABB blocks, but not ABC blocks, and 9-month-olds showed the opposite pattern, with deoxyHb responding significantly different from zero for the ABC blocks but not the ABB blocks. DeoxyHb responses were more pronounced over anterior regions. A grammar by time interaction also illustrated that during the early blocks, deoxyHb was significantly greater to ABC than in later blocks, but there was no change in ABB activation over time. The shift from stronger activation to ABB in newborns (Gervain et al., 2008) and 7-month-olds in the present study to stronger activation to ABC by 9-month-olds here is discussed in terms of changes in stimulus salience and novelty preference over the first year of life. The present discussion also highlights the importance of future work exploring the coupling between oxyHb and deoxyHb activation in infant NIRS studies

Strength training improves muscle quality and insulin sensitivity in Hispanic older adults with type 2 diabetes

Hispanics are at increased risk of morbidity and mortality due to their high prevalence of diabetes and poor glycemic control. Strength training is the most effective lifestyle intervention to increase muscle mass but limited data is available in older adults with diabetes. We determined the influence of strength training on muscle quality (strength per unit of muscle mass), skeletal muscle fiber hypertrophy, and metabolic control including insulin resistance (Homeostasis Model Assessment –HOMA-IR), C-Reactive Protein (CRP), adiponectin and Free Fatty Acid (FFA) levels in Hispanic older adults. Sixty-two community-dwelling Hispanics (>55 y) with type 2 diabetes were randomized to 16 weeks of strength training plus standard care (ST group) or standard care alone (CON group). Skeletal muscle biopsies and biochemical measures were taken at baseline and 16 weeks. The ST group show improved muscle quality (mean±SE: 28±3) vs CON (-4±2, p<0.001) and increased type I (860±252µm(2)) and type II fiber cross-sectional area (720±285µm(2)) compared to CON (type I: -164±290µm(2), p=0.04; and type II: -130±336µm(2), p=0.04). This was accompanied by reduced insulin resistance [ST: median (interquartile range) -0.7(3.6) vs CON: 0.8(3.8), p=0.05]; FFA (ST: -84±30µmol/L vs CON: 149±48µmol/L, p=0.02); and CRP [ST: -1.3(2.9)mg/L vs CON: 0.4(2.3)mg/L, p=0.05]. Serum adiponectin increased with ST [1.0(1.8)µg/mL] compared to CON [-1.2(2.2)µg/mL, p<0.001]. Strength training improved muscle quality and whole-body insulin sensitivity. Decreased inflammation and increased adiponectin levels were related with improved metabolic control. Further studies are needed to understand the mechanisms associated with these findings. However, these data show that strength training is an exercise modality to consider as an adjunct of standard of care in high risk populations with type 2 diabetes

Cellulosomics, a gene-centric approach to investigating the intraspecific diversity and adaptation of Ruminococcus flavefaciens within the rumen

Peer reviewedPublisher PD

“Working the system”: The experience of being a primary care patient

Health care providers and system administrators are in the midst of a paradigm shift; moving from paternalism toward an egalitarian approach. For patient centred care to occur, health care providers must prioritize patient needs; provide information regarding treatments while taking patient preferences and expectations into account. While there is literature regarding patient centredness, there is less information from the patient perspective about the experience of being a patient and the influence on behaviour. Using phenomenological research methods and the theory of planned behaviour as a theoretical framework, this study addressed the questions, a) what is the essence of being a primary health care patient, and b) what influence do beliefs, attitudes, and experience have on people’s behaviour as a patient? Nineteen individuals participated. Seven shared elements of being a primary health care patient were identified and contributed to the development of a composite vignette. The patient experience was a socially oriented, governed and reinforced cyclical process. Patients described themselves as actively engaged in their health care – “working the system” to get what they needed, when they needed it. Patients changed their beliefs, attitudes and behaviour as a result of experiences with their physicians, and their perceived success or failure in acquiring the best health care possible. Being a patient was not a single, observable behaviour, but rather a set of contextually dependent strategies patients’ directed at the specific goal of getting the best healthcare possible. The theory of planned behaviour was unsuitable for understanding patients’ beliefs, attitudes and behaviour

Neural Responses to Peer Rejection in Anxious Adolescents: Contributions from the Amygdala-Hippocampal Complex

Peer rejection powerfully predicts adolescent anxiety. While cognitive differences influence anxious responses to social feedback, little is known about neural contributions. Twelve anxious and 12 age-, gender- and IQ-matched, psychiatrically-healthy adolescents received ‘not interested’ and ‘interested’ feedback from unknown peers during a Chatroom task administered in a neuroimaging scanner. No group differences emerged in subjective ratings to peer feedback, but all participants reported more negative emotion at being rejected (than accepted) by peers to whom they had assigned high desirability ratings. Further highlighting the salience of such feedback, all adolescents, independent of anxiety levels, manifested elevated responses in the amygdala-hippocampal complex bilaterally, during the anticipation of feedback. However, anxious adolescents differed from healthy adolescents in their patterns of persistent amygdala-hippocampal activation following rejection. These data carry interesting implications for using neuroimaging data to inform psychotherapeutic approaches to social anxiety