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United States Department of Agriculture Wildlife Services: Staff Publications

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Articles 601 - 605 of 605

Full-Text Articles in Animal Sciences

Chlorophacinone Baiting For Belding’S Ground Squirrels, Craig A. Ramey, George H. Matschke, Richard M. Engeman Jan 2007

Chlorophacinone Baiting For Belding’S Ground Squirrels, Craig A. Ramey, George H. Matschke, Richard M. Engeman

United States Department of Agriculture Wildlife Services: Staff Publications

The efficacy of using 0.01% chlorophacinone on steam-rolled oat (SRO) groats applied in CA alfalfa by spot-baiting/hand baiting around burrow entrances (~11.5 g) to control free-ranging Belding's ground squirrels (Spermophilus beldingi) were compared in 6 randomly assigned square treatment units (TUs). Four TUs were given the rodenticide and 2 treated with placebo bait. Each TU was a 0.4 ha square surrounded by a similarly treated 5.5 ha square buffer zone. Baits were applied on May 13 and re-applied, on May 20 and May 22, after 7 days of un-forecasted cool wet weather greatly reduced their above ground activity. Pesticide (EPA …


Management Of Cattail (Typha Spp.) Stands With Glyphosate To Disperse Blackbirds, George M. Linz, H. Jeffrey Homan, Ryan L. Wimberly, Philip Mastrangelo, William J. Bleier Oct 2004

Management Of Cattail (Typha Spp.) Stands With Glyphosate To Disperse Blackbirds, George M. Linz, H. Jeffrey Homan, Ryan L. Wimberly, Philip Mastrangelo, William J. Bleier

United States Department of Agriculture Wildlife Services: Staff Publications

In the Prairie Pothole Region of North Dakota and South Dakota, blackbirds (Icteridae) gather by the thousands in large premigratory roosts in late summer and early fall. Wetlands dominated by cattails (Typha spp.) provide ideal roosting habitat for these aggregations. Sunflower fields near large roosts can receive substantial damage. To eliminate potential roosting sites, Wildlife Services of the United States Department of Agriculture has implemented a cattail management program that aerially sprays dense cattail stands with the herbicide glyphosate m-(phosphonomethyl) glycine]. The continued viability of the program depends on a positive benefit-cost ratio and minimal environmental impacts. In this …


Cheloniidae (Marine Turtle) Nest Predation, John Woolard, Richard M. Engeman, Henry T. Smith, John Griner Feb 2004

Cheloniidae (Marine Turtle) Nest Predation, John Woolard, Richard M. Engeman, Henry T. Smith, John Griner

United States Department of Agriculture Wildlife Services: Staff Publications

On 19 June 2003 at 0217 h, an opossum (Didelphis virginiana) was observed for 10 min while digging into a marine turtle nest and eating 4 eggs on the beach at St. Lucie Inlet Preserve State Park (SLIPSP) on Jupiter Island, Florida. The predation event was observed using night vision equipment as part of nightly patrols to protect turtle nests from raccoon (Procyon lotor) and armadillo (Dasypus noverncinctus) predation during the nesting season. After verification of an ongoing predation event, the opossum was euthanized and removed. Prior to implementing predator removal on this beach, …


Uncertainty Of Exploitation Estimates Made From Tag Returns, L.E. Miranda, R.E. Brock, Brian S. Dorr Apr 2002

Uncertainty Of Exploitation Estimates Made From Tag Returns, L.E. Miranda, R.E. Brock, Brian S. Dorr

United States Department of Agriculture Wildlife Services: Staff Publications

Over 6,000 crappies Pomoxis spp. were tagged in five water bodies to estimate exploitation rates by anglers. Exploitation rates were computed as the percentage of tags returned after adjustment for three sources of uncertainty: post-release mortality due to the tagging process, tag loss, and the reporting rate of tagged fish. Confidence intervals around exploitation rates were estimated by re-sampling from the probability distributions of tagging mortality, tag loss, and reporting rate. Estimates of exploitation rates ranged from 17% to 54% among the five study systems. Uncertainty around estimates of tagging mortality, tag loss, and reporting resulted in 90% confidence intervals …


Evaluation Of Mirrors To Deter Nesting Starlings, Thomas W. Seamans, Charles D. Lovell, Richard A. Dolbeer, Jonathon D. Cepek Jun 2001

Evaluation Of Mirrors To Deter Nesting Starlings, Thomas W. Seamans, Charles D. Lovell, Richard A. Dolbeer, Jonathon D. Cepek

United States Department of Agriculture Wildlife Services: Staff Publications

European starlings (Sturnus vulgaris) nesting in buildings and other structures can cause health, nuisance, and safety problems. We evaluated effectiveness of flashing lights combined with mirrors, and mirrors alone, as deterrents for starlings nesting in starling nest boxes in northern Ohio, 1998-2000. Each year, 100 nest boxes attached to utility poles were randomly assigned equally among 4 treatments (including untreated boxes): 1998- mirrored (internally placed on the back and 2 side walls of nest boxes), mirrored with red-flashing lights, and mirrored with green-flashing lights; 1999-convex mirror above entrance hole, convex mirror at back of nest box, and flat …