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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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We are focused on some of the most significant issues society faces, and our science is making a substantial contribution to the well-being of the Nation and the world. Learn more about the major topics our research covers and the programs focused on those topics.

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Neonate morphometrics and lambing season characteristics of desert bighorn sheep Neonate morphometrics and lambing season characteristics of desert bighorn sheep

Desert bighorn sheep (Ovis canadensis) populations often occur in remote areas at low densities, leading to gaps in knowledge of life history. In November 2011, we translocated 11 female desert bighorn sheep from the Fra Cristobal Mountains and 9 from Red Rock Wildlife Management Area (RRWMA) to the Peloncillo Mountains in southwestern New Mexico. In December 2012, we captured 21 adult...
Authors
Grace L. Parikh, Rebekah C. Karsch, James W. Cain, Eric M. Rominger, Elise J. Goldstein
By
Cooperative Research Units

Mountain sentinels in a changing world: Review and conservation implications of weather and climate effects on mountain goats (Oreamnos americanus) Mountain sentinels in a changing world: Review and conservation implications of weather and climate effects on mountain goats (Oreamnos americanus)

Climate change is occurring at an accelerated rate in high-elevation alpine and mountain ecosystems. Cold-adapted, mountain species are at risk due to forecasted change and knowledge is needed to respond to current and future conservation challenges. Mountain goats (Oreamnos americanus) are an iconic species of North American mountain cultures and landscapes, and due to specialized...
Authors
Kevin White, Becky Cadsand, Steeve D. Cote, Tabitha A. Graves, Sandra Hamel, Richard B. Harris, Forest Hayes, Eran Hood, Kevin Hurley, Tyler Jessen, Bill Jex, Erich H. Peitzsch, Wesley Sarmento, Helen M. Schwantje, Joel Berger
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center

Agricultural return flow dynamics on a reach of the East River, Colorado, as assessed by mass balance Agricultural return flow dynamics on a reach of the East River, Colorado, as assessed by mass balance

The U.S. Geological Survey, in cooperation with the Upper Gunnison River Water Conservancy District, studied historical streamflow in a reach of the East River, Colorado, to gain a preliminary understanding of return flow dynamics. Return flow is agricultural irrigation water that is not consumed by evapotranspiration and instead reaches streams by surface and subsurface flow paths. The...
Authors
Carleton R. Bern, Rachel G. Gidley
By
Water Resources Mission Area, Colorado Water Science Center

Effects of exploitation and emigration on apparent survival of Walleye in Lake Sharpe, South Dakota Effects of exploitation and emigration on apparent survival of Walleye in Lake Sharpe, South Dakota

Objective In 2017, we began a 5-year mark–recapture study to estimate apparent survival of Walleye Sander vitreus and angler exploitation in Lake Sharpe, South Dakota, and inform management strategies for this fishery. The study revealed substantial downstream emigration of Walleye; therefore, we also examined the influence of emigration on apparent mortality.Methods We estimated Walleye...
Authors
Laurel H. Sacco, Mark J. Fincel, Cameron W. Goble, Tanner Davis, Steven R. Chipps
By
Cooperative Research Units

Presence-absence surveys yield spatially imprecise information about nesting sites of an endangered, forest-nesting seabird Presence-absence surveys yield spatially imprecise information about nesting sites of an endangered, forest-nesting seabird

Presence-absence surveys are frequently used to monitor populations of rare and elusive species. Such data may also be used as a proxy for breeding activity, but links between presence-absence data and higher-order processes must be validated to determine their reliability. The Marbled Murrelet (Brachyramphus marmoratus) is a threatened seabird that nests in older-aged forests along the...
Authors
Jonathan J. Spurgeon, Lindsay J. Adrean, S. Kim Nelson, Matthew G. Betts, Daniel D. Roby, James W. Rivers
By
Cooperative Research Units

Intrinsic and environmental drivers of pairwise cohesion in wild Canis social groups Intrinsic and environmental drivers of pairwise cohesion in wild Canis social groups

Animals within social groups respond to costs and benefits of sociality by adjusting the proportion of time they spend in close proximity to other individuals in the group (cohesion). Variation in cohesion between individuals, in turn, shapes important group-level processes such as subgroup formation and fission–fusion dynamics. Although critical to animal sociality, a comprehensive...
Authors
John F. Benson, David A. Keiter, Peter J. Mahoney, Benjamin L. Allen, Lee R. Allen, Francisco Álvares, Morgan L. Anderson, Shannon M. Barber-Meyer, Adi Barocas, James C Beasley, Linda Behrendorff, Jerrold L. Belant, Dean Beyer, Luigi Boitani, Bridget L Borg, Stan Boutin, Erin E. Boydston, Justin L. Brown, Joseph K. Bump, Jonathon D. Cepek, Michael J Chamberlain, Yvette M. Chenaux-Ibrahim, Seth G. Cherry, Duško Ćirović, Paolo Ciucci, H. Dean Cluff, Susan M Cooper, Kevin R. Crooks, Daniel L.J. Dupont, Robert N. Fisher, Daniel Fortin, Thomas D. Gable, Emilio Garcia, Eli Geffen, Stanley D. Gehrt, Michael Gillingham, Douglas C. Heard, Mark Hebblewhite, Joseph W Hinton, Austin T. Homkes, Chris G. Howden, Djuro Huber, Pat J. Jackson, Kyle Joly, Allicia P Kelly, Marcella J. Kelly, Katrien A. Kingdon, Abhijeet Kulkarni, Josip Kusak, Gerald W. Kuzyk, Bryce C. Lake, Luis Llaneza, Jose Vicente Lopez-Bao, Daniel R. MacNulty, Ashley A.D. McLaren, Philip D. McLoughlin, Evelyn H. Merrill, Kenneth J. Mills, Numi Mitchell, Seth A. Moore, Matthew A. Mumma, Maureen H. Murray, Marco Musiani, Mónia Nakamura, Eric W. Neilson, Lalenia M. Neufeld, Thomas M Newsome, John K. Oakleaf, Vincente Palacios, Marlo M. Perdicas, Thomas Perry, Tyler R. Petroelje, Cyrenea B. Piper, Christina M. Prokopenko, Laura R. Prugh, Seth P.D. Riley, Helena Rio-Maior, Gretchen H. Roffler, Dale Rollins, Håkan Sand, Fiona K A Schmiegelow, Dale R. Seip, Mathew S Sorum, Colleen C. St. Clair, Robin Steenweg, Michael W. Strohbach, Jack Tatler, Maria Thaker, Connor A. Thompson, Julia W. Turner, Abi Tamim Vanak, Eric Vander Wal, Petter Wabakken, Scott E Walter, Sarah C Webster, Tyler J. Wheeldon, Camilla Wikenros, Steve K. Windels, Julie K. Young, Sana Zabihi-Seissan, Barbara Zimmermann, Brent R. Patterson
By
Ecosystems Mission Area, Western Ecological Research Center (WERC)
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