Grizzly Bear and Black Bear Marking Behavior

Marking activity is common among ursids but little information has been quantified about this behavior. We describe marking behavior of sympatric grizzly bear (Ursus arctos) and black bear (U. americanus) populations in a 31,400-km2 area in northwestern Montana. We found marking activity in all areas occupied by bears regardless of bear density and land use. Based on examination of > 5000 bear marking sites, rubbing was the most common behavior at these sites. We used genetic analysis of hair collected at rubs to identify species, sex, and individual identity of bears using them and remotely-triggered cameras to observe bear behavior. Both grizzly bears and black bears rubbed; 58 percent of rubs had black bear hair, 25 percent grizzly hair, and 11 percent hair from both species. Bears typically marked standing trees (86%) but sign posts on hiking trails and forest roads, and power poles were also used. Only males rubbed May-June but female use increased substantially by late summer. Although cubs were detected at lower rates than older bears, all grizzly bear sex and age classes participated in rubbing. Many sites were rubbed repeatedly within and between years but there was also continual turnover. One function of rubbing appears to be chemical communication among bears, although this behavior is different from marking behavior observed in territorial species such as canids. With the high frequency of rubbing activity in these sympatric bear populations, hair from bear rubs provides a reliable and efficient way to concurrently sample both species to monitor population trends

Black Bear Density In Glacier National Park, Montana

No demographic information exists on the status of Glacier National Park’s (GNP) black bear (Ursus americanus) population. In 2004, we sampled the black bear population within GNP plus a 10 km buffer using noninvasive hair collection methods as part of a 7.8 million– acre study of the regional grizzly bear (U. arctos) population. We collected 5645 hair samples rom 550 baited hair traps, and 3807 samples from multiple visits to 1,542 natural bear rubs. Microsatellite analysis identified 601 (51% F) individuals from the 2848 samples identified as black bears. Data from individual bears were used in closed population mark–recapture models to estimate black bear population abundance. We developed an information-theoretic approach to estimate the effectively sampled area from which we calculated density for the6600 km2 greater GNP area. Preliminary results suggest that the density of GNP’s black bear population was equal to or greater than other interior populations sympatric with grizzlies, despite the high density of grizzlies. This project represents the first estimate of black bear density for this area, and demonstrates the efficiency of multi–species projects to inform management

Methodology for the use of DSSAT models for precision agriculture decision support

A prototype decision support system (DSS) called Apollo was developed to assist researchers in using the Decision Support System for Agrotechnology Transfer (DSSAT) crop growth models to analyze precision farming datasets. Because the DSSAT models are written to simulate crop growth and development within a homogenous unit of land, the Apollo DSS has specialized functions to manage running the DSSAT models to simulate and analyze spatially variable land and management. The DSS has modules that allow the user to build model input files for spatial simulations across predefined management zones, calibrate the models to simulate historic spatial yield variability, validate the models for seasons not used for calibration, and estimate the crop response and environmental impacts of nitrogen, plant population, cultivar, and irrigation prescriptions. This paper details the functionality of Apollo, and presents the results of an example application

An Estimate of Backcountry Day Use of Glacier National Park

Estimates the number of people entering the Glacier National Park backcountry for the summer season of 1988 using infrared beam-activated photography, embedded vibration sensing counters, and trailhead registration validated by personal observation. The study also developed an equation to estimate use levels in future seasons at low cost

Evaluating Reproductive Success and Changes in Genetic Diversity of Grizzly Bears in Northwestern Montana

Current range expansions of large terrestrial carnivores are occurring following anthropogenically-induced range contraction. Contractions are often incomplete, leaving small remnant groups in refugia throughout the former range. We know little about underlying eco-evolutionary processes that influence how remnant groups are affected during range expansion. We used data from a spatially-explicit, long-term genetic sampling effort of grizzly bears (Ursus arctos) in the Northern Continental Divide Ecosystem (NCDE) to identify the processes underlying spatial patterns of genetic diversity. We conducted parentage analysis to evaluate how reproductive success and migration contribute to spatio-temporal patterns of genetic diversity in remnant groups of grizzly bears existing in the southwestern (SW), southeastern (SE), and east-central (EC) regions of the NCDE. Highly skewed reproductive success and local inbreeding caused distinct signatures in remnants that eroded rapidly (~1 generation) during population expansion and migration into the regions. Our results highlight that individual-level genetic and reproductive dynamics play critical roles during genetic assimilation, and show that patterns of genetic distinctiveness on the leading edge of an expansion may result from historical demographic patterns that are highly ephemeral

Using experience-based design to understand the patient and caregiver experience with delirium

Hospital-acquired delirium negatively affects clinical outcomes and the care experience for patients and family caregivers. Following the qualitative methods of experience-based design, we completed observations of hospital units and interviews of patients, caregivers (including family members and other companions), and hospital nurses and other staff regarding their experiences with delirium. In addition, we administered an experience-based design questionnaire to another 130 subjects from the same groups. Key findings included: there is a need for preparation of the patients and family caregivers for the possibility of delirium (particularly before surgery), and patients and caregivers lack understanding of delirium and its potential prolonged aftereffects. We identified that caregivers may both contribute and detract from delirium care as they: (1) often identify delirium early; (2) are invaluable for supporting patients during re-orientation after delirium episodes; (3) frequently lack the preparation and skills for adequate delirium detection and response; (4) may not be present at critical times; (5) can be challenging for the delirium management team, and (6) are frequently discussed as the person who best understands the patients’ baseline cognitive state and behavior. Experience-based design is an innovative framework to increase our qualitative understanding of the patient and caregiver experience during and following episodes of hospital acquired delirium

A Rapidly Varying Red Supergiant X-Ray Binary in the Galactic Center

We analyzed multiwavelength observations of the previously identified Galactic center X-ray binary CXO 174528.79–290942.8 (XID 6592) and determine that the near-infrared counterpart is a red supergiant based on its spectrum and luminosity. Scutum X-1 is the only previously known X-ray binary with a red supergiant donor star and closely resembles XID 6592 in terms of X-ray luminosity (L X), absolute magnitude, and IR variability (L IR,var), supporting the conclusion that XID 6592 contains a red supergiant donor star. The XID 6592 infrared counterpart shows variability of ~0.5 mag in the Wide-field Infrared Survey Explorer-1 band (3.4 μm) on timescales of a few hours. Other infrared data sets also show large-amplitude variability from this source at earlier epochs but do not show significant variability in recent data. We do not expect red supergiants to vary by ~50% in luminosity over these short timescales, indicating that the variability should be powered by the compact object. However, the X-ray luminosity of this system is typically ~1000× less than the variable luminosity in the infrared and falls below the Chandra detection limit. While X-ray reprocessing can produce large-amplitude fast infrared variability, it typically requires LX >> LIR,var to do so, indicating that another process must be at work. We suggest that this system may be a supergiant fast X-ray transient (SFXT), and that a large (~1038 ergs s−1), fast (102-4 s) X-ray flare could explain the rapid IR variability and lack of a long-lasting X-ray outburst detection. SFXTs are normally associated with blue supergiant companions, so if confirmed, XID 6592 would be the first red supergiant SFXT, as well as the second X-ray red supergiant binary.A.M. acknowledges support from the Generalitat Valenciana through the grant BEST/2015/242 and from the Ministerio de Educación, Cultura y Deporte through the grant PRX15/00030