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14 results on '"Sedinger, Benjamin S."'

7. Influence of underground mining with explosives on a hibernating bat population.

Author

Summers, Jennifer L., White, John Paul, Kaarakka, Heather M., Hygnstrom, Scott E., Sedinger, Benjamin S., Riddle, Jason, Van Deelen, Timothy, and Yahnke, Christopher

Subjects
ECHOLOCATION (Physiology), MINES & mineral resources, NEGATIVE binomial distribution, ATMOSPHERIC pressure, EXPLOSIVES, BATS
Abstract

Bats arouse from hibernation both naturally and in response to disturbances. Frequent bat arousals can decrease survival due to increased energetic costs. An active sand mine in west‐central Wisconsin hosted over 52,000 hibernating bats of 4 species in inactive tunnels, and regularly blasted with explosives to remove sand. We collected environmental and acoustic data at this mine during two hibernation seasons (November 1 through February 28 in 2013–2014 and 2014–2015) to examine the effect of blasting on echolocation calls (bat activity), a measure of bat arousal from hibernation. We used total bat activity recorded 7 h before and 7 h after blast time as the response variable, assigned it to a binary category and used that as a fixed effect. We used explosive charge per delay (kg), number of blasts per day, number of consecutive blast days, barometric pressure, temperature, and hibernation season as fixed effects. We used generalized linear mixed models with a negative binomial distribution and Bayesian information criterion (BIC) for model selection. The BIC‐optimal model did not include any of the variables associated with blasting, but included activity timing, temperature, barometric pressure, and season as fixed effects, of which all were significant. Blasting did not influence bat activity significantly in this mine. [ABSTRACT FROM AUTHOR]

Published
2023
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14. CHAPTER TWENTY-FOUR: Spatial-Temporal Variation in Survival of Harvested Greater Sage-Grouse.

Author

Sedinger, Benjamin S., Sedinger, James S., Espinosa, Shawn, Atamian, Michael T., and Blomberg, Erik J.

Abstract

Adult survival is often the demographic parameter to which rate of population change is most sensitive, yet few estimates of survival exist for Greater Sage-Grouse (Certtrocercus urophasianus). We used relocations of radio-tagged sage grouse to estimate monthly survival throughout their range in Nevada. We also evaluated the relationship between hunter harvest in October and survival during October and November-December, and the relationships between late fall survival and landcover variables in sage grouse home ranges measured from Southwest Regional GAP landcover types. The best performing model of monthly survival allowed survival to vary among seven local sage grouse planning areas in Nevada. This model also allowed survival to differ between October, November-December, and other months and allowed for an additive negative effect of harvest during October. We found no evidence that landscape-level habitat variables in home ranges affected survival during fall. Annual survival varied from 0.16 ± 0.12 in the bistate area along the California-Nevada border to 0.72 ± 0.06 in the south-central area. Total harvest of sage grouse during October was negatively related to survival in October (β = -0.65 ± 0.17). Our study demonstrates the potential for substantial spatial variation in survival of sage grouse and the potential for effects of harvest. [ABSTRACT FROM AUTHOR]

Published
2009

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