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  • 1
    Online Resource
    Online Resource
    Use of opportunistic sightings and expert knowledge to predict and compare Whooping Crane stopover habitat : Species distribution model for Whooping Cranes
    Wiley ; 2015
    In:  Conservation Biology Vol. 29, No. 5 ( 2015-10), p. 1337-1346
    Details
    In: Conservation Biology, Wiley, Vol. 29, No. 5 ( 2015-10), p. 1337-1346
    Type of Medium: Online Resource
    ISSN: 0888-8892
    URL: Article
    DOI: 10.1111/cobi.12515
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2020041-9
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Correction of location errors for presence‐only species distribution models
    Wiley ; 2014
    In:  Methods in Ecology and Evolution Vol. 5, No. 3 ( 2014-03), p. 207-214
    Details
    In: Methods in Ecology and Evolution, Wiley, Vol. 5, No. 3 ( 2014-03), p. 207-214
    Abstract: Species distribution models ( SDM s) for presence‐only data depend on accurate and precise measurements of geographical and environmental covariates that influence presence and abundance of the species. Some data sets, however, may contain both systematic and random errors in the recorded location of the species. Environmental covariates at the recorded location may differ from those at the true location and result in biased parameter estimates and predictions from SDM s. Regression calibration is a well‐developed statistical method that can be used to correct the bias in estimated coefficients and predictions from SDM s when the recorded geographical location differs from the true location for some, but not all locations. We expand the application of regression calibration methods to SDM s and provide illustrative examples using simulated data and opportunistic records of whooping cranes ( Grus americana ). We found we were able to successfully correct the bias in our SDM parameters estimated from simulated data and opportunistic records of whooping cranes using regression calibration. When modelling species distributions with data that have geographical location errors, we recommend researchers consider the effect of location errors. Correcting for location errors requires that at least a portion of the data have locations recorded without error. Bias correction can result in an increase in variance; this increase in variance should be considered when evaluating the utility of bias correction.
    Type of Medium: Online Resource
    ISSN: 2041-210X , 2041-210X
    URL: Issue
    URL: Article
    DOI: 10.1111/mee3.2014.5.issue-3
    DOI: 10.1111/2041-210X.12144
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2528492-7
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  • 3
    Online Resource
    Online Resource
    Effects of Deer Density and Land Use on Mass of White-Tailed Deer
    U.S. Fish and Wildlife Service ; 2013
    In:  Journal of Fish and Wildlife Management Vol. 4, No. 1 ( 2013-06-01), p. 20-32
    Details
    In: Journal of Fish and Wildlife Management, U.S. Fish and Wildlife Service, Vol. 4, No. 1 ( 2013-06-01), p. 20-32
    Abstract: Local and regional land use changes, such as the expansion of cropland for cellulosic biofuels, and the population density of white-tailed deer can affect the health and body mass of white-tailed deer Odocoileus virginianus. We collected hunter-harvest data for 1,731 white-tailed deer from DeSoto National Wildlife Refuge in eastern Nebraska and western Iowa from 2003 to 2010. We used linear mixed-effects models and information theoretic methods to estimate effects of density of white-tailed deer and proportion of total landcover area converted from cropland to cool- or warm-season grassland on body mass of white-tailed deer. Density of white-tailed deer at DeSoto National Wildlife Refuge ranged from 36.5 to 50.6 deer/km2, and the proportion of landcover at DeSoto National Wildlife Refuge that remained cropland each year ranged from 14.9 to 23.2%. Body mass was inversely related to population density (−1.4 kg/5.5 deer/km2) and proportion of cropland (−1.3 kg/3.1% conversion of total land area from cropland to grassland). We used auxiliary harvest data collected at Boyer Chute National Wildlife Refuge to validate our models and found our models performed well. We estimate densities of white-tailed deer must be reduced by 1.7 (SE  =  0.6) deer/km2 for every 1% change in total landcover from cropland to grassland in order for white-tailed deer to maintain body mass. Our results indicate increased harvest of white-tailed deer, resulting in a reduction in population density, may offset negative effects that a decline in the amount of available cropland could have on the body mass and health of white-tailed deer.
    Type of Medium: Online Resource
    ISSN: 1944-687X
    URL: Article
    URL: Article
    DOI: 10.3996/022012-JFWM-015
    DOI: 10.3996/022012-JFWM-015.S4
    Language: English
    Publisher: U.S. Fish and Wildlife Service
    Publication Date: 2013
    detail.hit.zdb_id: 2646687-9
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  • 4
    Online Resource
    Online Resource
    Mitigating avian collisions with power lines through illumination with ultraviolet light
    Resilience Alliance, Inc. ; 2022
    In:  Avian Conservation and Ecology Vol. 17, No. 2 ( 2022)
    Details
    In: Avian Conservation and Ecology, Resilience Alliance, Inc., Vol. 17, No. 2 ( 2022)
    Type of Medium: Online Resource
    ISSN: 1712-6568
    URL: Article
    DOI: 10.5751/ACE-02217-170209
    Language: English
    Publisher: Resilience Alliance, Inc.
    Publication Date: 2022
    detail.hit.zdb_id: 2214934-X
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  • 5
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    Online Resource
    Nondetection sampling bias in marked presence‐only data
    Wiley ; 2013
    In:  Ecology and Evolution Vol. 3, No. 16 ( 2013-12), p. 5225-5236
    Details
    In: Ecology and Evolution, Wiley, Vol. 3, No. 16 ( 2013-12), p. 5225-5236
    Abstract: Species distribution models ( SDM ) are tools used to determine environmental features that influence the geographic distribution of species' abundance and have been used to analyze presence‐only records. Analysis of presence‐only records may require correction for nondetection sampling bias to yield reliable conclusions. In addition, individuals of some species of animals may be highly aggregated and standard SDM s ignore environmental features that may influence aggregation behavior. We contend that nondetection sampling bias can be treated as missing data. Statistical theory and corrective methods are well developed for missing data, but have been ignored in the literature on SDM s. We developed a marked inhomogeneous Poisson point process model that accounted for nondetection and aggregation behavior in animals and tested our methods on simulated data. Correcting for nondetection sampling bias requires estimates of the probability of detection which must be obtained from auxiliary data, as presence‐only data do not contain information about the detection mechanism. Weighted likelihood methods can be used to correct for nondetection if estimates of the probability of detection are available. We used an inhomogeneous Poisson point process model to model group abundance, a zero‐truncated generalized linear model to model group size, and combined these two models to describe the distribution of abundance. Our methods performed well on simulated data when nondetection was accounted for and poorly when detection was ignored. We recommend researchers consider the effects of nondetection sampling bias when modeling species distributions using presence‐only data. If information about the detection process is available, we recommend researchers explore the effects of nondetection and, when warranted, correct the bias using our methods. We developed our methods to analyze opportunistic presence‐only records of whooping cranes ( Grus americana ), but expect that our methods will be useful to ecologists analyzing opportunistic presence‐only records of other species of animals.
    Type of Medium: Online Resource
    ISSN: 2045-7758 , 2045-7758
    URL: Issue
    URL: Article
    DOI: 10.1002/ece3.2013.3.issue-16
    DOI: 10.1002/ece3.887
    Language: English
    Publisher: Wiley
    Publication Date: 2013
    detail.hit.zdb_id: 2635675-2
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  • 6
    Online Resource
    Online Resource
    Movements of white‐tailed deer in riparian habitat: Implications for infectious diseases
    Wiley ; 2011
    In:  The Journal of Wildlife Management Vol. 75, No. 6 ( 2011-08), p. 1436-1442
    Details
    In: The Journal of Wildlife Management, Wiley, Vol. 75, No. 6 ( 2011-08), p. 1436-1442
    Abstract: Movements of male white‐tailed deer ( Odocoileus virginianus ) are of great concern with respect to spread of chronic wasting disease (CWD) across landscapes because most yearlings males disperse and adult males have higher prevalence of CWD than do females and younger deer. We radiocollared and monitored 85 male white‐tailed deer in the middle Missouri River Valley of eastern Nebraska and western Iowa, USA from 2004 to 2008. Average size (±SE) of fixed‐kernel annual home ranges (95%) and core areas (50%) for resident deer were 449 (±32) ha and 99 (±7) ha, respectively. Resident deer exhibited a high‐degree of fidelity to their home ranges. Mean overlap between consecutive annual home ranges and core areas was 81% and 74%, respectively. Average dispersal distance was 17.7 ± 4.5 km (range = 3–121 km) for 22 radio‐marked and 6 ear‐tagged yearlings. Mean spring dispersal distance (25 km) was 150% greater than fall (10 km). Dispersal direction from Desoto National Wildlife Refuge (DNWR) was bimodal on a northwest to southeast axis that followed the Missouri River corridor. Of 22 yearlings that dispersed, 18 (82%) established adult home ranges within the river valley. Dispersal movements of yearling males represent the greatest risk for rapid spread of diseases from infected source populations. Disease management efforts in riparian habitats should target male fawns and yearling males for removal in areas within or immediately adjacent to river corridors. © 2011 The Wildlife Society.
    Type of Medium: Online Resource
    ISSN: 0022-541X , 1937-2817
    URL: Issue
    URL: Article
    DOI: 10.1002/jwmg.v75.6
    DOI: 10.1002/jwmg.183
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2066663-9
    SSG: 12
    SSG: 23
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  • 7
    Online Resource
    Online Resource
    Modifying elk ( Cervus elaphus ) behavior with electric fencing at established fence‐lines to reduce disease transmission potential
    Wiley ; 2011
    In:  Wildlife Society Bulletin Vol. 35, No. 1 ( 2011-03), p. 9-14
    Details
    In: Wildlife Society Bulletin, Wiley, Vol. 35, No. 1 ( 2011-03), p. 9-14
    Abstract: Direct and indirect contact through fences at cervid farms with only a single perimeter fence may play a role in transmission of diseases such as chronic wasting disease or bovine tuberculosis ( Mycobacterium bovis ). We report a case study examining effectiveness of a baited electric fence, as an addition to an existing single woven‐wire fence (2.4 m high), for altering behavior and reducing fence‐line contact between elk ( Cervus elaphus ). We used a video‐surveillance system to monitor one 20‐m‐long test fence at an elk ranch in north‐central Colorado, USA from 2006 to 2007. We conducted 26 trials (11 without electric fence during 48.2 total cumulative days and 15 with electric fence during 63.7 days) with different levels of motivation for contact between groups of elk separated by the test fence. We documented 426 contacts between elk (direct transmission risk) or the woven‐wire fence (indirect transmission risk) during trials without the electric fence. We documented 0 contacts between adult elk or the woven‐wire fence during trials when the electric fence was in place. During our case study, 24 of 25 elk exposed to the electric fence were completely deterred. We emphasize that our approach targets behavior modification of farmed elk routinely exposed to the electric fence, not wild elk that may occasionally approach from the outside. Our results suggest that adding a baited electric fence inside an existing woven‐wire–fenced enclosure has potential to provide a cost‐effective means to minimize contacts between farmed and wild elk. © 2011 The Wildlife Society.
    Type of Medium: Online Resource
    ISSN: 1938-5463
    URL: Issue
    URL: Article
    DOI: 10.1002/wsb.v35.1
    DOI: 10.1002/wsb.2
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2067355-3
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  • 8
    Online Resource
    Online Resource
    An evaluation of three statistical methods used to model resource selection
    Elsevier BV ; 2010
    In:  Ecological Modelling Vol. 221, No. 4 ( 2010-2), p. 565-574
    Details
    In: Ecological Modelling, Elsevier BV, Vol. 221, No. 4 ( 2010-2), p. 565-574
    Type of Medium: Online Resource
    ISSN: 0304-3800
    URL: Article
    DOI: 10.1016/j.ecolmodel.2009.10.033
    RVK:
    AR 10100
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2010
    detail.hit.zdb_id: 191971-4
    detail.hit.zdb_id: 2000879-X
    SSG: 12
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  • 9
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    Online Resource
    Probabilistic movement model with emigration simulates movements of deer in Nebraska, 1990–2006
    Elsevier BV ; 2009
    In:  Ecological Modelling Vol. 220, No. 19 ( 2009-10), p. 2481-2490
    Details
    In: Ecological Modelling, Elsevier BV, Vol. 220, No. 19 ( 2009-10), p. 2481-2490
    Type of Medium: Online Resource
    ISSN: 0304-3800
    URL: Article
    DOI: 10.1016/j.ecolmodel.2009.06.028
    RVK:
    AR 10100
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2009
    detail.hit.zdb_id: 191971-4
    detail.hit.zdb_id: 2000879-X
    SSG: 12
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  • 10
    Online Resource
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    Space use of sympatric deer in a riparian ecosystem in an area where chronic wasting disease is endemic
    Wiley ; 2011
    In:  Wildlife Biology Vol. 17, No. 2 ( 2011-06), p. 191-209
    Details
    In: Wildlife Biology, Wiley, Vol. 17, No. 2 ( 2011-06), p. 191-209
    Abstract: Knowledge of movements, range size and spatial overlap of sympatric deer is integral to understanding chronic wasting disease (CWD) in endemic areas and can assist resource managers in modeling the spread of the disease. We radio‐collared 70 deer (30 mule deer Odocoileus hemionus and 40 white‐tailed deer O. virginianus) in the North Platte River Valley in western Nebraska, USA, from 2004 to 2007 to document movements, size and spatial overlap of home range and resource selection of these sympatric species of deer. We compared home‐range size and overlap and resource selection among male and female mule deer and white‐tailed deer to examine relative use of space in order to understand the potential for indirect spread of CWD better. We identified forested, riparian habitats as high selection of use and these habitats could likely contribute to the potential spreading of CWD between sympatric deer that concentrate in these areas. We found that migration, size of home range of female mule deer, and similarities in resource selection could contribute to sustaining or spreading CWD in Nebraska. The role of female mule deer in the spread of CWD coupled with selection for riparian corridors by both species should be investigated further, because these factors may be a primary determinant of disease spread in the historical range of mule deer.
    Type of Medium: Online Resource
    ISSN: 1903-220X , 1903-220X
    URL: Article
    DOI: 10.2981/10-055
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 2276904-3
    SSG: 12
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