Baxter J.J.,Brigham Young University |
Hennefer J.P.,Rangeland Management Specialist |
Baxter R.J.,Brigham Young University |
Larsen R.T.,Brigham Young University |
Flinders J.T.,Brigham Young University
Western North American Naturalist | Year: 2013
Research indicates that low nest success and juvenile survival may be factors contributing to Greater Sage-Grouse population declines. Recent technological advances in microtransmitters have allowed researchers to monitor individual chicks and broods. We initiated a chick survival study in 2006 and used microtransmitters to (1) examine the viability of using microtransmitters on chicks to assess survival, including the effect of handling time during the suturing process; (2) estimate overall chick survival; and (3) compare chick survival in the Strawberry Valley population to other published reports. We used a known-fate model in program MARK to estimate ĉ (overdispersion), weekly survival rates, and 49-day survival of radio-marked chicks. Chick survival rates were lowest during the initial 3 weeks of life, after which point weekly survival stabilized. Survival over 49 days was estimated at 0.25 (SE 0.10) and was comparable to estimates from other populations. Handling time was negatively associated with chick survival, and chicks were 2 times more likely to survive to 49 days when handled for only 5 minutes instead of 19 minutes. We recommend that researchers be judicious in using microtransmitters and make every effort to reduce handling time during transmitter attachment. © 2013.
Pawelek K.A.,Texas A&M University-Kingsville |
Smith F.S.,Texas A&M University-Kingsville |
Falk A.D.,Texas A&M University-Kingsville |
Clayton M.K.,Texas AgriLife Research Center |
And 2 more authors.
Rangelands | Year: 2015
On the Ground With energy production expanding in the United States, rangelands are increasingly being affected. We studied three different reseeding techniques for pipeline rights of way restoration on rangelands impacted by energy development in the Eagle Ford Shale play of south Texas. Techniques studied were 1) broadcast seeding, 2) no-till drill seeding, and 3) hydroseeding. Using ecotypic native seed mixes, we found that all seeding techniques resulted in successful restoration of rights of ways. We are working to inform landowners, oil and gas operators, and rangeland professionals of our findings. © 2015 The Society for Range Management.
Bernau C.R.,University of Arizona |
Sprinkle J.,University of Arizona |
Tanner R.,Rancher |
Kava J.A.,Rangeland Management Specialist |
And 3 more authors.
Rangelands | Year: 2014
On the Ground The 1990 Dude Fire on the Mogollon Rim in Arizona and the following restoration resulted in an invasion of weeping lovegrass. Ecosystem restoration required successful collaboration between federal, state, and private individuals. We used protein supplementation to redistribute grazing pressure on the rangeland and to increase use of nutrient-poor old-growth weeping lovegrass forage. We observed that cattle hoof action worked in concert with targeted grazing to achieve the desired effect on weeping lovegrass. After 2 years of targeted grazing, we saw a short-term reduction in weeping lovegrass and increased competitive opportunities for native vegetation. © 2014 by the Society for Range Management.