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Linking avian vocal behaviors and resource selection using a novel broadcast transmitter technology

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Title:Linking avian vocal behaviors and resource selection using a novel broadcast transmitter technology
Authors:Netoskie, Erin Caleigh
Contributors:Hart, Patrick J. (advisor)
Tropical Conservation Biology & Environmental Science (department)
Wildlife conservation
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Date Issued:Dec 2019
Publisher:University of Hawaii at Hilo
Abstract:Most studies that explore the environmental factors that influence the distribution and abundance of species do not incorporate social behaviour into their habitat selection models. Resource selection by individuals is multifaceted and can reflect the intensity of space use in an ecosystem. For nine ʻōmaʻo (Myadestes obscurus), a species of thrush endemic to Hawaiʻi island, I combined movement data, habitat structure features collected by an airborne light detection and ranging (lidar) system, and vocalisation data recorded with a novel broadcast transmitter to link where different types of vocalisations (i.e. song, call, whisper song) most frequently occur across the landscape with the underlying habitat features. At the population-level, I found the presence of song was highly variable across a landscape, while the likelihood of calls increased in the open lava matrix and whisper songs were associated with the dense interior areas of the kīpuka (i.e. forest fragments). In contrast, the rate of ʻōmaʻo vocalisations decreased in the open lava matrix, suggesting that ʻōmaʻo may be selecting the matrix for foraging rather than vocalising. For individuals, I found similar patterns for songs and whisper songs, but there was high intra-specific variation. The results revealed context-specific uses of vocalisations across birds’ home ranges as each vocalisation type is associated with different behaviours, including courtship, aggression, and social interactions between individuals. Moreover, the novel methodologies used to document the relationship between behaviour and resource selection can be applied to many taxa across different ecological landscapes.
Pages/Duration:54 pages
Rights:All UHH dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: Tropical Conservation Biology and Environmental Science
TCBES Theses

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