-
1
Factors influencing risk of predation by subsidized predators on juvenile Mojave desert tortoises (Gopherus agassizii)
Published 2024-11-01“…Replica distance from a powerline or road also did not significantly influence predation risk, supporting previous studies that have found the risk of predation can persist for up to 1.6 km from raven nesting structures. Our results support recommendations for releasing juvenile head-started and translocated tortoises in the fall and away from areas close to raven nesting structures. …”
Get full text
Article -
2
Reproductive success of Common Ravens influences nest predation rates of their prey: implications for egg-oiling techniques
Published 2018-06-01“…We found daily predation rates on night-heron nests (median: 1.71%, 85% CI: 1.15-2.44%) and chicks (median: 0.57%, 85% CI: 0.27-1.03%) were the highest during years when ravens nested successfully. During years that raven eggs were oiled, daily predation rates on night-heron nests (0.98%, 85% CI: 0.55-1.57%) and chicks (0.00%, 85% CI: 0.0-0.00%) decreased, and we observed the lowest daily predation rates for nests (0.40%, 85% CI: 0.17-0.76%) during years when raven nesting was naturally absent on the island. …”
Get full text
Article -
3
Testing nest deterrents for Chihuahuan ravens on H‐frame transmission structures
Published 2015-09-01“…In southeastern Colorado, USA, Chihuahuan ravens nesting on H‐frame transmission structures historically nested exclusively above the center phase. …”
Get full text
Article -
4
Novel management tools for subsidized avian predators and a case study in the conservation of a threatened species
Published 2019-10-01“…We mounted our RFAS on telescoping poles and unmanned aerial vehicles (UAVs; drones) and found that we were able to aerially, and precisely, spray‐oil eggs high in trees or cliffs/rock faces, halting 100% (n = 46) of raven nesting events. With these tools, we enable managers to calculate the intensity of, and the ability to carry out, egg addling needed to stem or halt predator population growth. …”
Get full text
Article