Abstract Roads, while central to the function of human society, create barriers animal movement through collisions and habitat fragmentation. Barriers affect evolution trajectory populations. Investigators have attempted use traffic volume, number vehicles passing a point on road segment, predict effects wildlife populations approximately linearly along taxonomic lines; however, groupings cannot provide sound predictions because closely related species often respond differently. We assess...

Abstract Densely vegetated environments have hindered collection of basic population parameters on forest‐dwelling ungulates. Our objective was to develop a mark–recapture technique that used DNA from fecal pellets overcome constraints associated with estimating abundance ungulates in landscapes where direct observation is difficult. We tested our Sitka black‐tailed deer ( Odocoileus hemionus sitkensis ) the temperate coastal rainforest Southeast Alaska. During 2006–2008, we sampled along...

A common arboreal rodent of boreal and montane coniferous forests, the northern flying squirrel (Glaucomys sabrinus) has several life-history traits typical K-selected species. Density varies among forest types, with core areas use centering on food patches. is largely limited by food, to a lesser extent, suitable natal dens, but also influenced potential competitors predators. Local abundance G. sabrinus frequently correlated density large trees snags, shrub canopy cover, prevalence...

Abstract Research on the impact of clearcut logging and partial harvesting practices northern flying squirrels ( Glaucomys sabrinus ) has shown inconsistent contrary results, limiting use this species as a management indicator species. Much variability in study results is due to labor intensive nature studying squirrels, resulting small sampling sizes (average = 5.2 sites, n 14) high variation (CV 0.59) across studies. We conducted meta‐analysis relevant studies from North America determine...

Where dispersal is energetically expensive, feeding and food availability can influence success. The endemic Prince of Wales northern flying squirrel (Glaucomys sabrinus griseifrons) inhabits a landscape mosaic old-growth, 2nd-growth, clear-cut stands, with the latter 2 representing expensive habitats. We estimated diet squirrels using stable isotope fecal analyses, determined whether varies among forest assessed likelihood foraging across managed given distribution foods on Island (POW),...

Abstract Although dispersal is an important attribute of animal population ecology, knowledge rates or distances for many wide‐ranging species lacking. Current methods require capturing and restraining animals, which can be cost‐prohibitive, fail to collect sufficient samples change ranging behaviors. Herein, we describe a novel, cost‐effective non‐invasive method, using bait enriched with stable isotopes mark the hair American martens Martes americana . Captive that consumed isotopically...

Abstract: Most habitats available to black bear (Ur,~usamericanus) in the Mississippi Alluvial Valley (M.4V) consist of seasonally flooded commercial forests where lack suitable dens may limit population growth. \Ve studied interactions between forest management and flooding relative female denning. Denning behavior differed noncommercial forests. Females used tree exch~sivelyon nonco~nmercialforests, whereas on forests, most (83%) were ground dens. L7ariationsin den elevation resulted...

-Fifteen raccoons were fitted with radio-transmitters and monitored from March 1987 to May 1988; 1091 locations classified according occurrence within three available den types: tree cavities, rock outcroppings ground burrows. Overall use generally reflected availability of dens, but varied across seasons among different age sex. Rock dens used most often during winter, especially when temperatures fell below freezing; adult males showed the frequent consistent dens. Ground burrows...

This report describes the clinical and radiographic findings together with surgical management of temporomandibular joint contents herniation through tympanic plate external auditory canal. Two patients are reported. A review literature is presented, including a brief discussion embryological development Excluding infection, trauma or neoplasm, defect in canal represents developmental aberration failure foramen Huschke to close during development. pre-auricular approach insertion fixation an...

Three different types of forests (mature, mixed upland, and cut-over) in central Arkansas were surveyed June October 1991 February May 1992 for latrines swamp rabbits (Sylvilagus aquaticus). Swamp deposited >91% their fecal pellets on logs. A greater density found compared to other months. Length, height, diameter, decay class, percent cover moss logs used as by recorded. Logistic regression was predict the likelihood that a log would be latrine. Increasing percentage moss, diameter...

Management indicator species (MIS) often are selected because their life history and demographics thought to reflect a suite of ecosystem conditions that too difficult or costly measure directly. The northern flying squirrel ( Glaucomys sabrinus ) has been proposed as an MIS temperate rain forest southeastern Alaska based on previous studies in the Pacific Northwest demonstrated its habitat is multi‐factorial, i.e., emergent property old‐growth forest. We evaluated suitability squirrels...

Successful dispersal in many species may be a function of the distance at which animals can perceive particular landscape feature (i.e., perceptual range), as well energetic costs associated with traversing towards that feature. We used model, relating range to body size mammals, predict northern flying squirrel ( Glaucomys sabrinus (Shaw, 1801)) fragmented forests Southeast Alaska. hypothesized squirrels would 325.5–356.5 m clearcuts and 159.7–174.9 second-growth stands. The advantage may,...

Two subspecies of white-tailed deer Odocoileus virginianus are recognized in the northwestern United States: O. v. leucurus (Douglas, 1829), and ochrourus Bailey, 1932. Historically, was common along Lower Columbia River name applied to all populations western Oregon as far south Grants Pass. Today, is limited with another Douglas County, Oregon. Examination 35 electrophoretic loci 1988 did not support current subspecific taxonomy Analysis 18 cranial dimensions among three disjunct 2003...

We radiotagged seven female and two male Marbled Murrelets (Brachyramphus marmoratus) of undetermined breeding status followed their movements through the inner passages northern southeast Alaska during season (May–July) in 1998. Six nine murrelets were detected inland early morning hours from 24 June to 17 July. Inland visits for each individual consistent a particular location, but short duration, which precluded locating nest sites. recorded 46 locations at sea up 124 km (x̄ = 78 ± 27 km)...

We studied the Prince of Wales flying squirrel (Glaucomys sabrinus griseifrons) in temperate rain forest southeastern Alaska to provide 1st quantitative estimates demography from and test predictions hypothesis that Sitka spruce (Picea sitchensis)-western hemlock (Tsuga heterophylla) is primary habitat for G. Alaska. expected abundance, body condition, productivity, summer overwinter survival would be higher spruce-hemlock (which typically are old-growth forests upland sites [upland-OG])...

We studied habitat relations of the Prince Wales flying squirrel (Glaucomys sabrinus grisetfrons), an endemic temperate, coniferous rainforest southeastern Alaska, because concerns over population viability from extensive clear-cut logging in region. used stepwise logistic regression to examine relationships between microhabitat use (i.e., captures among traps spaced at 40-m intervals) and 26 vegetative structural features measured plots centered on trap stations. Seasonal (spring, autumn)...