Here is just a few things that have been done in the Experimental Forest and Oregon's research biologists:
Proceedings, Western Section, American Society of Animal Science TEMPOROSPATIAL DISTRIBUTIONS OF ELK, MULE DEER, AND CATTLE: RESOURCE PARTITIONING AND COMPETITIVE DISPLACEMENT
http://wwws.isu.edu/departments/bios...al.%202002.pdfSome Responses of Riparian Soils to Grazing Management in Northeastern Oregon
http://www.rmrs.nau.edu/awa/ripthrea...khouse1985.pdfDensity-dependent effects on physical condition and reproduction in North American elk: an experimental test
http://www.isu.edu/bios/CV_Pub/Bowye...al.%202005.pdfThe Starkey Databases: Spatial-Environmental Relations of North American Elk, Mule Deer and Cattle at the Starkey Experimental Forest and Range in Northeastern Oregon
http://www.fs.fed.us/pnw/pubs/journa...004_kie001.pdfEffects of bull age on conception dates and pregnancy rates of cow elk
Noyes, JH | Johnson, BK | Bryant, LD | Findholt, SL | Thomas, JW
Journal of Wildlife Management. Vol. 60, no. 3, pp. 508-517. 1996.
http://md1.csa.com/partners/viewreco...&setcookie=yes
https://research.wsulibs.wsu.edu:844...20Kauffman.PDF
Elk distribution and modeling in relation to roads
The Journal of wildlife management ISSN 0022-541X CODEN JWMAA9 Source / Source 2000, vol. 64, no3, pp. 672-684 (1 p.3/4)
We tested performance of 3 aspects of an elk (Cervus elaphus)-road density model that has been used extensively throughout western North America but has not been sufficiently validated. First, we tested the hypothesis that elk selection of habitats increases with increasing distance away from open roads. This forms the empirical basis for the model. Second, we compared the model's predictions of relative elk habitat selection, or habitat effectiveness (HE), with observed values at varying levels of road density. And third, we examined the potentially confounding effects of different spatial patterns of roads on model predictions. We conducted our study during spring and summer, 1993-95, at the Starkey Experimental Forest and Range (Starkey), northeast Oregon. Selection ratios were calculated using >100,000 recorded locations of 89 radiocollared female elk, with locations mapped in relation to 0.1-km-wide distance bands away from open roads. Selection ratios increased with increasing distance from open roads, and varied between seasons, but not among years or individual animals. Linear regression models, using distance to open roads as a predictor, accounted for significant variation in selection ratios during spring and summer. Model predictions of HE, as measured by number of elk locations, corresponded only weakly, however, with observed values of HE. The contradictory results of these 2 analyses may be explained in part by our simulation results, which showed that potential reductions in elk HE vary strongly with the spatial pattern of roads, which is not measured by the elk-road density model. Our results suggest that (1) management of roads and related human activities during spring and summer should remain an important consideration for modeling and managing the elk resource; and (2) a spatially explicit road component is needed for elk habitat models.
http://cat.inist.fr/?aModele=afficheN&cpsidt=1441580Journal of Mammalogy 84(3):1076-1088. 2003
doi: 10.1644/BBa-020
DAILY AND SEASONAL MOVEMENTS AND HABITAT USE BY FEMALE ROCKY MOUNTAIN ELK AND MULE DEER
http://www.bioone.org/doi/abs/10.1644/BBa-020Niche partitioning among mule deer, elk, and cattle: Do stable isotopes reflect dietary nich?
http://www.isu.edu/departments/bios/...Ecoscience.pdfTitle: Effects of roads on elk: implications for management in forested ecosystems. Author: Rowland, Mary M.; Wisdom, Michael J.; Johnson, Bruce K.; Penninger, Mark A. Date: 2004 Source: In: Transactions of the 69th North American Wildlife and Natural Resources Conference: 491-508
http://www.treesearch.fs.fed.us/pubs/24797Effects of male age and female nutritional condition on elk reproduction
Spring calf:cow ratios in some Rocky Mountain elk (Cervus elaphus) populations of northeast Oregon have declined by almost 80% over the last 40 years. Studies have identified the age of breeding males and the nutritional condition of females as potentially contributing factors. We conducted a study in 2 trials, from 1989 to 1993 and from 1995 to 1999, to assess the effects of male age on conception dates and pregnancy rates of female elk in northeast Oregon. Results of the first trial, reported previously, showed a significant influence of male age on conception dates but not on pregnancy rates. The second trial, reported here, was intended to validate findings of the first. trial and to evaluate the interaction of male age and female nutritional condition. We managed an elk population within a 78-km2 enclosure to allow a single cohort of males to function as herd sires as they matured from 1.5 to 5.5 years of age. From animals killed in December, we estimated pregnancy rates, age, nutritional condition (kidney fat index, [MFI]), and lactation status of females and the conception dates of their fetuses. Mean conception dates occurred 1 week earlier as male age increased and were related to KFI in females. Nutritional condition of female elk was 67% higher in 1995 when breeding was by yearling males than in years when breeding was by 4-year-old or 5-year-old males. Pregnancy rates did not differ among ages of males. We used analysis of covariance with female nutritional condition as the covariate to evaluate the interactive effects of male age and female nutritional condition on conception dates of females bred by males of different ages across 2 trials. Mean conception dates (adjusted for female nutritional condition) pooled by age of males decreased from 4 October with yearling male sires to 21 September with 5-year-old male sires. Mean KFI of pregnant, lactating female elk was 118 during the validation and 148 during the initial trial. Pregnancy rates did not differ by male age between trials. We stress the importance of understanding the interactions between age of males and nutritional condition of females prior to interpreting the results of management strategies designed to retain older males because of the many factors that affect calf elk survival.
Revue / Journal Title
The Journal of wildlife management ISSN 0022-541X CODEN JWMAA9
Source / Source
2002, vol. 66, no4, pp. 1301-1307 [7 page(s) (article)] (23 ref.)
http://cat.inist.fr/?aModele=afficheN&cpsidt=14389083Title: Estimates of the values of elk in the Blue Mountains of Oregon and Washington: evidence from existing literature.
Author: Bolon, N.A.
Date: 1994
Source: Gen. Tech. Rep. PNW-GTR-316. Portland, OR: U.S. Department of Agriculture, Forest Servcie, Pacific Northwest Research Station. 38 p
http://www.treesearch.fs.fed.us/pubs/9059DIET COMPOSISTION, DRY MATTER INTAKE, AND DIET OVERLAP OF MULE DEER, ELK, AND CATTLE
http://ir.library.oregonstate.edu/js...%20Overlap.pdfModeling animal movements using stochastic differential equationsz
Haiganoush K. Preisler1*,y, Alan A. Ager2, Bruce K. Johnson3 and John G. Kie2
http://www.fs.fed.us/psw/programs/st...K_MOVEMENT.pdfLivestock grazing effects on forage quality of elk winter range
http://www.jstor.org/pss/4003399An exploratory data analysis (EDA) of the paths of moving animals
-►psu.edu [PDF]
DR Brillinger, HK Preisler, AA Ager, JG Kie - Journal of Statistical Planning and Inference, 2004 - Elsevier
... work presents an exploratory data analysis of the trajectories of deer and elk moving
about in the Starkey Experimental Forest and Range in eastern Oregon.
PREDICTION OF FORAGE QUALITY USING NEAR INFRARED REFLECTANCE SPECTROSCOPY ON ESOPHAGEAL FISTULA SAMPLES FROM CATTLE
ON MOUNTAIN RANGE 1
http://jas.fass.org/cgi/reprint/55/4/971.pdfLong-Term Research at the USDA Forest Service�s Experimental Forests and Ranges
http://urbaneco.org/Archives/uefn/Lugo_2006_Exp_For.pdfStatistical methods for analysing responses of wildlife to
human disturbance
http://gis.fs.fed.us/psw/publication...ler001_jae.pdfDate and plant community effects on elk sedge forage quality
http://ddr.nal.usda.gov/dspace/bitst...ND23330013.pdf[PDF] ►Stochastic differential equations: a tool for studying animal movement
HK Preisler, DR Brillinger, AA Ager, JG Kie, � - Proceedings of IUFRO4, 2001 - Citeseer
... was used to monitor the locations of radio-collared female elk and deer foraging
in a 9000 ha fenced region of the Starkey experimental forest in Oregon
Fecal Nitrogen and dietary quality relationships in juvenile elk
http://www.jstor.org/pss/3809547
http://www.jwildlifedis.org/cgi/reprint/34/3/539.pdfManagement Strategies for Sustainable Beef Cattle Grazing on Forested Rangelands in the Pacific Northwest
http://www.jstor.org/pss/3899872Herbivore Optimization by North American Elk: Consequences for Theory and Management
http://www.wildlifejournals.org/perlserv/?request=get-document&doi=10.2193%2F0084-0173%282006%29167[1%3AHOBNAE]2.0.CO%3B2
INFLUENCE OF PREVIOUS CATTLE AND ELK GRAZING ON THE SUBSEQUENT QUALITY AND QUANTITY OF DIETS FOR CATTLE, DEER, AND ELK GRAZING LATE-SUMMER MIXED-CONIFER RANGELANDS