Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons
In order to examine the potential impact of military jet overflights and other disturbances on productivity of peregrine falcons (Falco peregrinus), we observed behavioral reactions of peregrines to disturbances at nests along the Tanana River, Alaska during the 1995-1997 breeding seasons. Military...
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ftoregonstate:ir.library.oregonstate.edu:k643b548r 2024-09-15T18:05:28+00:00 Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons Nordmeyer, Dana L. Roby, Daniel D. Shafer, Dan Collopy, Mike Ramsey, Fred Oregon State University. Graduate School https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/k643b548r English [eng] eng unknown Oregon State University https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/k643b548r Copyright Not Evaluated Peregrine falcon -- Effect of noise on Airplanes -- Noise -- Physiological effect Masters Thesis ftoregonstate 2024-07-22T18:06:06Z In order to examine the potential impact of military jet overflights and other disturbances on productivity of peregrine falcons (Falco peregrinus), we observed behavioral reactions of peregrines to disturbances at nests along the Tanana River, Alaska during the 1995-1997 breeding seasons. Military jets conducted low-altitude flights over a sample of nests under observation in each year (experimental nests), while other nests were not intentionally overflown (reference nests). Other disturbances occurred at random. Animal noise monitors (ANMs), which collect and store data on noise disturbance levels, were deployed at each observed nest. A total of 878 above-threshold (≥ 85 dB) overflights were recorded by the ANMs during the course of the study. A total of 401 close (defined as ≤ 1000 m slant distance from the nest) overflights by subsonic F-16, F-15, A-10, Harrier, Jaguar, or Tornado jet aircraft were recorded during observations. Close overflights by military jets accounted for 63% of all observed potential disturbances at experimental nests; they accounted for 2.6% of all observed potential disturbances at reference nests. Other potential disturbances at reference nests included civilian fixed-wing aircraft (41%), boats (33%), avian predators (17%), helicopters (5%), and mammalian predators (1%). Peregrine falcons responded differently to animate and inanimate sources of disturbance, and responded most intensely and most frequently to other raptors, particularly conspecifics. Flight reactions were common, but not in response to inanimate sources. Among inanimate potential disturbances, falcons responded most intensely to boats (6% of reactions involved flight), and least intensely to helicopters (3%) and fixed-wing aircraft (2%). Intensity of reactions to military jets was indistinguishable from that to either boats or other aircraft. Intense behavioral responses (including flight reactions) to military jet overflights were rarely observed in this study, even at slant distances <500 m, and no intense ... Master Thesis Falco peregrinus peregrine falcon Alaska ScholarsArchive@OSU (Oregon State University) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
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English unknown |
topic |
Peregrine falcon -- Effect of noise on Airplanes -- Noise -- Physiological effect |
spellingShingle |
Peregrine falcon -- Effect of noise on Airplanes -- Noise -- Physiological effect Nordmeyer, Dana L. Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
topic_facet |
Peregrine falcon -- Effect of noise on Airplanes -- Noise -- Physiological effect |
description |
In order to examine the potential impact of military jet overflights and other disturbances on productivity of peregrine falcons (Falco peregrinus), we observed behavioral reactions of peregrines to disturbances at nests along the Tanana River, Alaska during the 1995-1997 breeding seasons. Military jets conducted low-altitude flights over a sample of nests under observation in each year (experimental nests), while other nests were not intentionally overflown (reference nests). Other disturbances occurred at random. Animal noise monitors (ANMs), which collect and store data on noise disturbance levels, were deployed at each observed nest. A total of 878 above-threshold (≥ 85 dB) overflights were recorded by the ANMs during the course of the study. A total of 401 close (defined as ≤ 1000 m slant distance from the nest) overflights by subsonic F-16, F-15, A-10, Harrier, Jaguar, or Tornado jet aircraft were recorded during observations. Close overflights by military jets accounted for 63% of all observed potential disturbances at experimental nests; they accounted for 2.6% of all observed potential disturbances at reference nests. Other potential disturbances at reference nests included civilian fixed-wing aircraft (41%), boats (33%), avian predators (17%), helicopters (5%), and mammalian predators (1%). Peregrine falcons responded differently to animate and inanimate sources of disturbance, and responded most intensely and most frequently to other raptors, particularly conspecifics. Flight reactions were common, but not in response to inanimate sources. Among inanimate potential disturbances, falcons responded most intensely to boats (6% of reactions involved flight), and least intensely to helicopters (3%) and fixed-wing aircraft (2%). Intensity of reactions to military jets was indistinguishable from that to either boats or other aircraft. Intense behavioral responses (including flight reactions) to military jet overflights were rarely observed in this study, even at slant distances <500 m, and no intense ... |
author2 |
Roby, Daniel D. Shafer, Dan Collopy, Mike Ramsey, Fred Oregon State University. Graduate School |
format |
Master Thesis |
author |
Nordmeyer, Dana L. |
author_facet |
Nordmeyer, Dana L. |
author_sort |
Nordmeyer, Dana L. |
title |
Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
title_short |
Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
title_full |
Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
title_fullStr |
Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
title_full_unstemmed |
Effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
title_sort |
effects of jet aircraft overflights and other potential disturbances on behavioral responses and productivity of nesting peregrine falcons |
publisher |
Oregon State University |
url |
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/k643b548r |
genre |
Falco peregrinus peregrine falcon Alaska |
genre_facet |
Falco peregrinus peregrine falcon Alaska |
op_relation |
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/k643b548r |
op_rights |
Copyright Not Evaluated |
_version_ |
1810443019196825600 |