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Year Published: 2019

Modeling White Sucker (Catostomus commersonii) populations to assess commercial harvest influence on age structure

Commercial harvest of White Suckers Catostomus commersonii for bait in the American Lobster Homarus americanus industry is minimally regulated in Maine and there are concerns as to the influence of increasing harvest. We built a population model using parameters (i.e. age-specific mortality, age at maturity, and size-specific fecundity) from...

Zydlewski, Joseph D.; Begley, Meg; Stephen Coghlan Jr.

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Year Published: 2019

The spatial scale of biotic change in Chihuahuan Desert fish assemblages

1. We examined riverine desert fish assemblages in the Chihuahuan Desert, USA at multiple spatial scales of similarity to assess long-term changes to assemblage distinctiveness, identify individual species responsible for changes, and determine the importance of geographic context and species resolution in interpreting patterns of change. 2. We...

Taylor, C.M.; Miyazono, S.; Cheek, C.A.; Edwards, R.J.; Patino, Reynaldo

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Year Published: 2019

Climate change implications for irrigation and groundwater in the Republican River Basin, U.S.A.

This study investigates the influence of climate change on groundwater availability, and thereby, irrigation across political boundaries within the United States’ High Plains aquifer. A regression model is developed to predict changes in irrigation according to predicted changes in precipitation and temperature from a downscaled dataset of 32...

Ou, Gengxin; Munoz-Arriola, F.; Uden, D.R.; Martin, D. R.; Allen, Craig R.; Shank, N.

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Year Published: 2019

Survival and cause-specific mortality of desert bighorn sheep lambs

Juvenile recruitment in desert bighorn sheep (Ovis canadensis mexicana) is highly variable, yet the mechanisms driving neonate survival are not well understood for the species. Few studies have equipped desert bighorn sheep lambs with radiocollars. As a result, definitive data on cause-specific mortality and lamb survival estimates are lacking...

Cain, James W.; REBEKAH C. KARSCH; Goldstein, Elise J.; Rominger, Eric M.; William R. Gould

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Year Published: 2019

Microhabitat use of native fishes in the Kootenai River: A fine‐scale evaluation of large‐scale habitat rehabilitation efforts

Fish and microhabitat data were collected at 542 prepositioned electrofishing sites (surface area of each site = 4 m2) in the Kootenai River, Idaho, during 2014 and 2015 to evaluate small‐scale habitat use by fishes, as it relates to large‐scale habitat rehabilitation efforts. Samples were collected from a 12‐km braided segment of...

Branigan, Philip R. ; Quist, Michael C.; Bradley B. Shepard; Susan C. Ireland

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Year Published: 2019

Estimating forest canopy cover dynamics in Valles Caldera National Preserve, New Mexico, using LiDAR and Landsat data

Increasing tree canopy cover has led to increasing wildfire activity in conifer dominated areas of the southwestern United States. Estimating historical changes in the spatial distribution of tree canopy cover can provide further insights into the dynamics of forest and fuel conditions in these landscapes and help prioritize...

Cain, James W.; Kamal Humagain1; Carlos Portillo-Quintero1; Robert D. Cox1

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Year Published: 2019

A values-based private landowner typology to improve grassland conservation initiatives

Many conservation initiatives are based on natural science alone, despite an extensive body of literature demonstrating that the incorporation of social science generates more successful and lasting outcomes. The Land Use Value (LUV) scale is an example of a social science tool that grassland conservation practitioners can use to improve their...

Sweikert, Lily A.; Gigliotti, Larry M.

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Year Published: 2019

Lesser prairie-chicken space use among landscapes in relation to anthropogenic structures

The Southern Great Plains has been altered by conversion of native grassland to row‐crop agriculture, which is considered the primary cause of declining lesser prairie‐chicken (Tympanuchus pallidicinctus) populations. However, recent analyses indicate that direct loss of grassland has slowed while lesser prairie‐chicken populations continue to...

Plumb, Reid T.; Lauternbach, Joseph M.; Robinson, Samantha G.; Haukos, David A.; Winder, Virginia L.; Hagen, Christian A.; Sullins, Daniel S.; Pittman, James C.; Dalhgren, David K.

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Year Published: 2019

Temporal variation in breeding season survival and cause-specific mortality of lesser prairie-chickens

The lesser prairie-chicken Tympanuchus pallidicinctus has experienced significant declines in distribution and abundance since the early 1900s. A severe and prolonged drought from 2009 to 2013 resulted in further declines in population numbers and despite improved environmental and habitat conditions since 2013, populations of lesser...

Andrew R. Meyers; Scott Carleton; William R. Gould; Clay T. Nichols; Haukos, David A.; Christian A. Hagen

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Year Published: 2019

Larger body size and earlier run timing increase alewife reproductive success in a whole lake experiment

Environmental conditions can influence biological characteristics like phenology and body size with important consequences for organismal fitness. Examining these fitness consequences under natural conditions through genetic pedigree reconstruction offers a lens into potential population responses to changing environments. Over three years (2013-...

Roy, Allison; Meghna N. Marjadi; Jordaan, Adrian ; Benjamin I. Gahagan; Michael P. Armstrong; Andrew R. Whiteley

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Year Published: 2019

How Minnesota wolf hunter and trapper attitudes and risk- and benefit-based beliefs predict wolf management preferences

In 2012, Minnesota’s first-ever regulated wolf hunting and trapping season occurred. Research has suggested that beliefs about risks and benefits associated with carnivores affect their acceptance. Using results from a 2013 mail survey of hunters and trappers who participated in the season, we employed mediation analysis to examine how risk- and...

Schroeder, Susan A.; Fulton, David C.; Cornicelli, Louis; Bruskotter, Jeremy T.

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Year Published: 2019

Subsidies from anadromous sea lamprey (Petromyzon marinus) carcasses function as a reciprocal nutrient exchange between marine and freshwaters

Nutrient and energy flows across ecosystem boundaries subsidize recipient communities and influence bottom‐up processes in food webs. Migratory fish such as anadromous sea lamprey provide a pulse of marine‐derived nutrients and energy to Atlantic coastal streams in spring when organisms would otherwise be subject to limiting resources. We...

Zydlewski, Joseph D.