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Zoology

2014

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Articles 31 - 60 of 235

Full-Text Articles in Life Sciences

Influence Of Nonnative And Native Ungulate Biomass And Seasonal Precipitation On The Vegetation Production In A Great Basin Ecosystem, Linda C. Zeigenfuss, Kathryn A. Schoenecker, Jason I. Ransom, Drew A. Ignizio, Tracy Mask Nov 2014

Influence Of Nonnative And Native Ungulate Biomass And Seasonal Precipitation On The Vegetation Production In A Great Basin Ecosystem, Linda C. Zeigenfuss, Kathryn A. Schoenecker, Jason I. Ransom, Drew A. Ignizio, Tracy Mask

Western North American Naturalist

The negative effects of equid grazers in semi-arid ecosystems of the American West has been considered to be disproportionate to the influence of native ungulates in these systems because of their large body size, hoof shape, and short history on the landscape relative to native grazers. Tools which can model the degree of influence of various grazers in an ecosystem and separate these effects from those caused by other variables (climate, anthropomorphic disturbances) can be useful to managers in determining location of non-native grazer impacts and assessing the effect of management actions targeted at different grazer populations. We used remotely ...


Demographic Monitoring And Population Viability Analysis Of Two Rare Beardtongues From The Uinta Basin, Rebecca M. Mccaffery, Rita Reisor, Kathryn Irvine, Jessi Brunson Nov 2014

Demographic Monitoring And Population Viability Analysis Of Two Rare Beardtongues From The Uinta Basin, Rebecca M. Mccaffery, Rita Reisor, Kathryn Irvine, Jessi Brunson

Western North American Naturalist

Energy development, in combination with other environmental stressors, poses a persistent threat to rare species endemic to the energy-producing regions of the Western United States. Demographic analyses of monitored populations can provide key information on the natural dynamics of threatened plant and animal populations, and how they might be affected by ongoing and future development. In the Uinta Basin in Utah and Colorado, Graham’s beardtongue (Penstemon grahamii) and White River beardtongue (Penstemon scariosus var. albifluvis) are two rare endemic wildflowers that persist on oil shale habitats heavily impacted by current energy exploration and development, and slated for expanded traditional ...


Reproduction And Pollination Of The Endangered Dwarf Bear-Poppy Arctomecon Humilis (Papaveraceae) Across A Quarter Century: Unraveling Of A Pollination Web?, Vincent J. Tepedino, John Mull, Terry L. Griswold, Gerald Bryant Nov 2014

Reproduction And Pollination Of The Endangered Dwarf Bear-Poppy Arctomecon Humilis (Papaveraceae) Across A Quarter Century: Unraveling Of A Pollination Web?, Vincent J. Tepedino, John Mull, Terry L. Griswold, Gerald Bryant

Western North American Naturalist

Arctomecon humilis, a rare gypsophile of the extreme northeastern Mojave Desert, is restricted to a few isolated populations (occurrences) in Washington Co, Utah (USA). At several points in the past quarter century, we have studied the breeding system and reproductive success of this endangered species, recorded its pollinators and tested the feasibility of human-assisted gene flow by conducting reciprocal crosses between two isolated occurrences approximately 4 km apart. We found A. humilis to possess a mixed breeding system in the occurrence studied (Beehive Dome in 1988); some plants exhibited self-compatibility but fruit/flowers and seeds/fruit were significantly lower in ...


Estimating The Ages Of Mountain Sucker Catostomus Platyrhynchus From The Black Hills: Precision, Maturation, And Growth, Jason J. Breeggemann, Cari-Ann Hayer, Jacob Krause, Luke D. Schultz, Katie N. Bertrand, Brian D. S. Graeb Nov 2014

Estimating The Ages Of Mountain Sucker Catostomus Platyrhynchus From The Black Hills: Precision, Maturation, And Growth, Jason J. Breeggemann, Cari-Ann Hayer, Jacob Krause, Luke D. Schultz, Katie N. Bertrand, Brian D. S. Graeb

Western North American Naturalist

Mountain Sucker Catostomus platyrhynchus is considered secure across its range, it has been declining in parts of its range, and is listed as a species of greatest conservation need in South Dakota. To our knowledge, no research has identified which calcified structure yields the most precise age estimates for Mountain Sucker and little is known about Mountain Sucker population dynamics. We compared scales, sectioned fin rays, whole otoliths, and polished otoliths to identify which structure provided the most precise age estimates for Mountain Sucker in the Black Hills of South Dakota. Additionally, we quantified recruitment, growth, age and size at ...


Population Genetic Structure Of The Baird's Pocket Gopher, Geomys Breviceps, In Eastern Texas, Sarah R. Welborn, Jessica E. Light Nov 2014

Population Genetic Structure Of The Baird's Pocket Gopher, Geomys Breviceps, In Eastern Texas, Sarah R. Welborn, Jessica E. Light

Western North American Naturalist

The Baird’s pocket gopher (Geomys breviceps) is a solitary, fossorial rodent found throughout areas of Texas, Arkansas, Oklahoma, and Louisiana. These rodents are highly modified morphologically for an underground lifestyle, often resulting in limited vagility and isolated populations. Despite these unique characteristics, little is known about the population genetics of pocket gophers. We used mitochondrial and microsatellite data and performed a series of population genetic analyses to better understand the population structure and gene flow among a series of G. brevicepslocalities. Population genetic analyses supported high levels of gene flow among nearby localities (within 2 km of each ...


Plant Community Changes Following Closure Of Artesian Wells In Great Sand Dunes National Park, Colorado, Sarah J. Garza, Gillian Bowser, Kenneth R. Wilson Nov 2014

Plant Community Changes Following Closure Of Artesian Wells In Great Sand Dunes National Park, Colorado, Sarah J. Garza, Gillian Bowser, Kenneth R. Wilson

Western North American Naturalist

Artificial artesian wells have existed in the San Luis Valley of south central Colorado for over 100 years and are an important source of water for livestock and wildlife. When Great Sand Dunes National Park and Preserve (GRSA) expanded its boundaries in 2000, 10 of these wells were within the new park boundary. In 2010, the National Park Service capped these wells to restore the surrounding habitat to a more natural state, which was severely disturbed from cattle and wildlife trampling. To study changes after well capping, we compared the plant communities in 2011 and 2012 and measured plant cover ...


Home-Range Size And Subadult Dispersal Of Black Bears In The Cascade Range Of Western Oregon, Dave Immell, Dewaine H. Jackson, Margaret C. Boulay Nov 2014

Home-Range Size And Subadult Dispersal Of Black Bears In The Cascade Range Of Western Oregon, Dave Immell, Dewaine H. Jackson, Margaret C. Boulay

Western North American Naturalist

Knowledge of home range size and subadult dispersal activity of North American black bears is essential for understanding the complexity of how bears interact within populations and the environment. During 1993-98, we monitored 96 radiocollared black bears (Ursus americanus) in the Cascade Range of western Oregon to estimate home range and dispersal movements. Composite fixed-kernel home ranges were calculated for 37 bears. Mean home range size differed between sexes (189.7 km2 for males and 33.6 km2 for females); however, there was no difference between subadult and adult male or subadult and adult female mean home range ...


Rediscovered Populations Of The Idaho Point-Headed Grasshopper, Acrolophitus Pulchellus (Bruner), 1890 (Orthoptera: Acrididae), Beth A. Waterbury Nov 2014

Rediscovered Populations Of The Idaho Point-Headed Grasshopper, Acrolophitus Pulchellus (Bruner), 1890 (Orthoptera: Acrididae), Beth A. Waterbury

Western North American Naturalist

The Idaho point-headed grasshopper, Acrolophitus pulchellus, is a rare endemic of the Sinks Drainages of east-central Idaho. Past collections were infrequent and found few specimens. Searches in 1993 failed to find specimens, leading to speculaton that A. pulchellus was extinct. I report rediscovered populations of A. pulchellus based on 55 capture records (10 collected); describe distribution, habitat, morphological, and life history information; and present the first photos of live adult specimens.


New Flea (Siphonaptera) Record For Heermann's Kangaroo Rat (Dipodomys Heermanni), San Luis Obispo County, California, Howard O. Clark Jr., Helen K. Pigage Nov 2014

New Flea (Siphonaptera) Record For Heermann's Kangaroo Rat (Dipodomys Heermanni), San Luis Obispo County, California, Howard O. Clark Jr., Helen K. Pigage

Western North American Naturalist

Three Heermann’s kangaroo rats (Dipodomys heermanni), from San Luis Obispo County, California, were examined for ectoparasites. Two species of flea were found,Meringis californicus and Hoplopsyllus anomalus. Occurrence of these two species onDipodomys heermanni has not been reported before and represents new host records.


First Record Of Leucism In The Genus Peromyscus (Mammalia: Rodentia), Issac Camargo, Evelyn Rios, Cristian Cornejo-Latorre, Sergio Ticul Álvarez-Castañeda Nov 2014

First Record Of Leucism In The Genus Peromyscus (Mammalia: Rodentia), Issac Camargo, Evelyn Rios, Cristian Cornejo-Latorre, Sergio Ticul Álvarez-Castañeda

Western North American Naturalist

Leucism is a partial hypopigmentary congenital disorder previously recorded in several species of mammals. This abnormal coloration is unusual in the wild. In August 2013, in the Baja California State, México, we collected two Peromyscus fraterculus (one female and one male) exhibiting leucism. Leucism has not been reported before ingenus Peromyscus, therefore, we documented the first known record. Leucism is a reflex of low levels of genetic diversity in natural populations. It may increase selective pressure on individuals.


End Matter, Vol. 74 No. 3 Nov 2014

End Matter, Vol. 74 No. 3

Western North American Naturalist

No abstract provided.


The Plecoptera And Trichoptera Of The Arctic North Slope Of Alaska, Michael R. Kendrick, Alexander D. Huryn Nov 2014

The Plecoptera And Trichoptera Of The Arctic North Slope Of Alaska, Michael R. Kendrick, Alexander D. Huryn

Western North American Naturalist

The Arctic is currently experiencing changes in climate more rapid than any other biome. This warming trend has resulted in significant abiotic changes to the seasonal patterns of freshwater ecosystems. Thorough inventories of freshwater insect communities are required to provide benchmarks allowing for the detection of range shifts in response to a warming climate. While statewide studies have been conducted for Trichoptera and Plecoptera, species accounts for these orders in Arctic Alaska have received relatively little attention. We surveyed Plecoptera and Trichoptera of Alaska’s Arctic North Slope at a variety of habitat types over an 11 year period. We ...


Um Marine And Freshwater Sciences Before Wentworth Point, Part 2: (1939), Um Marine Biological Lab At Lamoine, Randy Lackovic Nov 2014

Um Marine And Freshwater Sciences Before Wentworth Point, Part 2: (1939), Um Marine Biological Lab At Lamoine, Randy Lackovic

Darling Marine Center Historical Documents

This is picture album of the University of Maine Marine Biological Laboratory at Lamoine, Maine during the summer session in 1939.


Echinoderms: Durham: Proceedings Of The 12th International Echinoderm Conference, 7-11 August 2006, Durham, New Hampshire, U.S.A., Larry Harris, S. Boettger, Charles Walker, Michael Lesser Oct 2014

Echinoderms: Durham: Proceedings Of The 12th International Echinoderm Conference, 7-11 August 2006, Durham, New Hampshire, U.S.A., Larry Harris, S. Boettger, Charles Walker, Michael Lesser

S. Anne Boettger

Echinodermata have a rich fossil record, play major ecological roles in marine benthic communities from the intertidal to the deep sea, have economic importance in fisheries and aquaculture, show unique biological characteristics and have become important models in biomedical research.These proceedings of the 12th International Echinoderm Conference (Durham, New Hampshire, USA, 7-11 August 2006) includes recent advances made in research of echinoderms, and is organized into six sections:Paleontology; Systematics and Morphology; Physiology and Nutrition; Development, Molecular and Genetics; Fisheries and Aquaculture; Ecology and Environmental Studies


Barnacle Bonding: Morphology Of Attachment Of Xenobalanus Globicipitis To Its Host Tursiops Truncatus, Mark Pugliese, Stefanie Boettger, Frank Fish Oct 2014

Barnacle Bonding: Morphology Of Attachment Of Xenobalanus Globicipitis To Its Host Tursiops Truncatus, Mark Pugliese, Stefanie Boettger, Frank Fish

Frank E. Fish

No abstract provided.


Morphology And Microanatomy Of Harbor Porpoise (Phocoena Phocoena ) Dorsal Fin Tubercles, Carly Ginter, S. Boettger, Frank Fish Oct 2014

Morphology And Microanatomy Of Harbor Porpoise (Phocoena Phocoena ) Dorsal Fin Tubercles, Carly Ginter, S. Boettger, Frank Fish

Frank E. Fish

No abstract provided.


Morphology And Microanatomy Of Harbor Porpoise (Phocoena Phocoena ) Dorsal Fin Tubercles, Carly Ginter, S. Boettger, Frank Fish Oct 2014

Morphology And Microanatomy Of Harbor Porpoise (Phocoena Phocoena ) Dorsal Fin Tubercles, Carly Ginter, S. Boettger, Frank Fish

S. Anne Boettger

No abstract provided.


Barnacle Bonding: Morphology Of Attachment Of Xenobalanus Globicipitis To Its Host Tursiops Truncatus, Mark Pugliese, Stefanie Boettger, Frank Fish Oct 2014

Barnacle Bonding: Morphology Of Attachment Of Xenobalanus Globicipitis To Its Host Tursiops Truncatus, Mark Pugliese, Stefanie Boettger, Frank Fish

S. Anne Boettger

No abstract provided.


Re-Evaluating Neonatal-Age Models For Ungulates: Does Model Choice Affect Survival Estimates?, Troy W. Grovenburg, Kevin L. Monteith, Christopher N. Jacques, Robert W. Klaver, Christopher S. Deperno, Todd J. Brinkman, Kyle B. Monteith, Sophie L. Gilbert, Joshua B. Smith, Vernon C. Bleich, Christopher C. Swanson, Jonathan A. Jenks Sep 2014

Re-Evaluating Neonatal-Age Models For Ungulates: Does Model Choice Affect Survival Estimates?, Troy W. Grovenburg, Kevin L. Monteith, Christopher N. Jacques, Robert W. Klaver, Christopher S. Deperno, Todd J. Brinkman, Kyle B. Monteith, Sophie L. Gilbert, Joshua B. Smith, Vernon C. Bleich, Christopher C. Swanson, Jonathan A. Jenks

Natural Resource Ecology and Management Publications

New-hoof growth is regarded as the most reliable metric for predicting age of newborn ungulates, but variation in estimated age among hoof-growth equations that have been developed may affect estimates of survival in staggered-entry models. We used known-age newborns to evaluate variation in age estimates among existing hoof-growth equations and to determine the consequences of that variation on survival estimates. During 2001–2009, we captured and radiocollared 174 newborn (≤24-hrs old) ungulates: 76 white-tailed deer (Odocoileus virginianus) in Minnesota and South Dakota, 61 mule deer (O. hemionus) in California, and 37 pronghorn (Antilocapra americana) in South Dakota. Estimated age of ...


From Progesterone In Biopsies To Estimates Of Pregnancy Rates: Large Scale Reproductive Patterns Of Two Sympatric Species Of Common Dolphin, Delphinus Spp. Off California, Usa And Baja, Mexico, Nicholas Marc Kellar, Marisa L. Trego, Susan J. Chivers, Fredrick I. Archer, Wayne L. Perryman Sep 2014

From Progesterone In Biopsies To Estimates Of Pregnancy Rates: Large Scale Reproductive Patterns Of Two Sympatric Species Of Common Dolphin, Delphinus Spp. Off California, Usa And Baja, Mexico, Nicholas Marc Kellar, Marisa L. Trego, Susan J. Chivers, Fredrick I. Archer, Wayne L. Perryman

Bulletin of the Southern California Academy of Sciences

Blubber progesterone levels were measured in biopsy samples and used to predict the pregnancy status of 507 female common dolphins (204 long-beaked common dolphins, Delphinus capensis, and 303 short-beaked common dolphins, D. delphis). Samples were collected in the coastal waters of the eastern North Pacific between central California, USA and the southern end of Baja California, Mexico. The percentage of females pregnant was similar between the two species: 22.1% (n = 45) of D. capensis and 28.1% (n = 85) of D. delphis. For both species we found strong geographic patterns in pregnancy, suggesting that some areas were more conducive ...


Effects Of Stormwater Ponds On Calling Amphibian Communities In Monroe County, Ny, John Arthur Bateman Sep 2014

Effects Of Stormwater Ponds On Calling Amphibian Communities In Monroe County, Ny, John Arthur Bateman

Environmental Science and Ecology Theses

Many studies have investigated how urbanization affects calling amphibians and how stormwater retention ponds are utilized by anurans. Few studies, however, have investigated the combined effects of land use and within-pond conditions on these species. Thus, I studied calling amphibian communities at 38 stormwater ponds in Monroe County, NY to determine which factors at the local and landscape scale affected anuran presence, community composition, and breeding. I used aural surveys following Marsh Monitoring Program protocol to record presence and relative abundance and visual encounter surveys for signs of breeding. I used GIS to determine land use and also measured water ...


Contact Zone Of The Eastern And Western Marsh Wrens In Nebraska Revisited, Mark B. Robbins Sep 2014

Contact Zone Of The Eastern And Western Marsh Wrens In Nebraska Revisited, Mark B. Robbins

Nebraska Bird Review

Across the northern and coastal United States and southern central Canada the Marsh Wren (Cistothorus palustris) is a widespread breeder in cattail-dominated marshes. Although it has long been considered to be polytypic based on subtle plumage characters (Parkes 1959; Phillips 1986), it was not until Kroodsma (1989, 2005) demonstrated that there was a dramatic break in the primary (song) vocalization in the northern Great Plains that anyone suggested more than one species was involved. In 1986, as part of the delineation of the breeding distribution of both vocal types, Kroodsma (1988; see map therein) audio recorded wrens at nine localities ...


Stomach Content Analysis Of Recent Snowy Owl (Bubo Scandiacus) Specimens From Nebraska, Rachel L. Valenziano, Thomas E. Labedz Sep 2014

Stomach Content Analysis Of Recent Snowy Owl (Bubo Scandiacus) Specimens From Nebraska, Rachel L. Valenziano, Thomas E. Labedz

Nebraska Bird Review

The Snowy Owl (Bubo scandiacus) is a circumpolar bird of prey that breeds in extreme northern latitudes, including Canadian and Alaskan tundra. During winter months, some immature and non-breeding birds disperse south. North American birds may travel to southern Canada and northern parts of the United States, and in some extreme cases as far south as Oklahoma and Texas (Parmelee 1992). Although not fully understood, these irruptive events may be caused by the abundance of prey in northern Canada and Alaska (Parmelee 1992).

Prey typical of Snowy Owls are small mammals (e.g., lemmings and hares) of their home range ...


Summer Field Report, June–July 2014, W. Ross Silcock Sep 2014

Summer Field Report, June–July 2014, W. Ross Silcock

Nebraska Bird Review

This summer was marked by the "unremarkability," if there is such a thing, of the status of almost all species, especially passerines. A stark exception, however, was the pair of summering hummingbirds in a yard a few miles southeast of Chadron: Juanita Whittecar sent a collection of very good photos of these birds, detailed enough to determine that the pair of supposed Ruby-throated Hummingbirds actually consisted of a female Ruby-throated and a hybrid Ruby-throated x Broad-tailed male. Another odd phenomenon was the number of shorebird species with late Jun records, usually the brief window within which these species are absent ...


Nebraska Bird Review (September 2014) 82(3), Whole Issue Sep 2014

Nebraska Bird Review (September 2014) 82(3), Whole Issue

Nebraska Bird Review

Summer Field Report, June–July 2014 ... 98

Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska … 122

Contact Zone of the Eastern and Western Marsh Wrens in Nebraska Revisited ... 128

2013 (25th) Report of the NOU Records Committee ... 131

Subscription and Organization Information ... 147


Subscription And Organization Information [September 2014] Sep 2014

Subscription And Organization Information [September 2014]

Nebraska Bird Review

The Nebraska Bird Review is published quarterly by the Nebraska Ornithologists' Union, Inc., as its official journal, and is sent to members not in arrears of dues. Annual subscription rates (on a calendar-year basis only): $25 in the United States and $35 in all other countries, payable in advance. Single copies are $7 each, postpaid, in the United States and $9 elsewhere. Send orders for back issues to Anita Breckbill, NOU Librarian, c/o Music Library, WMB 30, University of Nebraska, Lincoln, NE 68588-0101.

Memberships in the NOU (on a calendar-year basis only): Active Household (one or more people) $25 ...


2013 (25th) Report Of The Nou Records Committee, Mark A. Brogie Sep 2014

2013 (25th) Report Of The Nou Records Committee, Mark A. Brogie

Nebraska Bird Review

The "Official List of the Birds of Nebraska" was first published in 1988 (NOU 1988) and has been updated three times (NOURC 1997, 2004, 2009). The "Official List" has been appended twenty-three times: (Mollhoff 1989; Grenon 1990, 1991; Gubanyi 1996a, 1996b, 1996c; Brogie 1997, 1998, 1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009a, 2009b, 2011, 2012, 2013; Jorgensen 2001, 2002, 2003).

The American Ornithologists' Union Checklist of North American Birds, Seventh Edition (1998) and its following supplements: (AOU: 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013) contain many taxonomic changes affecting North American birds.

The ...


Systematics Of The Neotropical Genus Leptodactylus Fitzinger, 1826 (Anura: Leptodactylidae): Phylogeny, The Relevance Of Non-Molecular Evidence, And Species Accounts, Rafael O. De Sá, Taran Grant, Arley Camargo, W. R. Heyer, María Laura Ponssa, Edward Stanley Sep 2014

Systematics Of The Neotropical Genus Leptodactylus Fitzinger, 1826 (Anura: Leptodactylidae): Phylogeny, The Relevance Of Non-Molecular Evidence, And Species Accounts, Rafael O. De Sá, Taran Grant, Arley Camargo, W. R. Heyer, María Laura Ponssa, Edward Stanley

Biology Faculty Publications

A phylogeny of the species-rich clade of the Neotropical frog genus Leptodactylus sensu stricto is presented on the basis of a total evidence analysis of molecular (mitochondrial and nuclear markers) and non-molecular (adult and larval morphological and behavioral characters) sampled from > 80% of the 75 currently recognized species. Our results support the monophyly of Leptodactylus sensu stricto, with Hydrolaetare placed as its sister group. The reciprocal monophyly of Hydrolaetare and Leptodactylus sensu stricto does not require that we consider Hydrolaetare as either a subgenus or synonym of Leptodactylus sensu lato. We recognize Leptodactylus sensu stricto, Hydrolaetare, Adenomera, and Lithodytes as ...


Natural Infections Of Tetrathyridia Of Mesocestoides Species In Deer Mice, Peromyscus Maniculatus, From New Mexico, John E. Ubelaker, Nora Abdullah, Aya Mouhaffel, Rashmi Ananadampillair, Caitlyn Emigh, Scott Lyell Gardner Sep 2014

Natural Infections Of Tetrathyridia Of Mesocestoides Species In Deer Mice, Peromyscus Maniculatus, From New Mexico, John E. Ubelaker, Nora Abdullah, Aya Mouhaffel, Rashmi Ananadampillair, Caitlyn Emigh, Scott Lyell Gardner

Papers in Parasitology

At Southern Methodist University campus about 6 miles south of Taos, New Mexico, we recovered tetrathyridia of Mesocestoides in five Peromyscus maniculatus in the summers of 2008 (3 of 129, 0.023%), 2009 (0 of 98, 0%), 2010 (1 of 112, 0.008%), 2011 (0 of 88, 0%), and 2012 (1 of 86, 0.011%). Tetrathyridia from the body cavity of one of the five infected mice were injected into the peritoneal cavity of laboratory white mice, Mus musculus. Our later examination of the laboratory mice revealed heavy infections of tetrathyridia continuing to reproduce asexually. Here we provide important new ...


Pygmy Rabbit (Brachylagus Idahoensis) Habitat Selection: Does Sagebrush (Artemisia Sp.) Age Influence Selection?, Robert J. Edgel, Janet L. Pierce, Randy T. Larsen Aug 2014

Pygmy Rabbit (Brachylagus Idahoensis) Habitat Selection: Does Sagebrush (Artemisia Sp.) Age Influence Selection?, Robert J. Edgel, Janet L. Pierce, Randy T. Larsen

Western North American Naturalist

The pygmy rabbit (Brachylagus idahoensis) is a sagebrush (Artemisia spp.) obligate that depends on sagebrush habitats for food and cover throughout its life cycle. Invasive species, frequent fires, overgrazing, conversion of land to agriculture, energy development, and many other factors have contributed to recent declines in both quantity and quality of sagebrush habitats required by pygmy rabbits. Given declining availability of sagebrush, there is a need to identify characteristics of suitable pygmy rabbit habitat. Although habitat selection information exists from several western states, data is limited for pygmy rabbits in Utah at the extent of their range. We sampled 77 ...