Northern elephant seal UAS mass estimates ...
Unmanned aerial system (UAS) photogrammetry offers a method that is safer for both animals and researchers and is logistically simpler than traditional weighing methods (Fiori et al. 2017). Additionally, UAS photogrammetry facilitates larger sample sizes because it allows measurement at larger spati...
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| Format: | Dataset |
| Language: | English |
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Dryad
2020
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| Online Access: | https://dx.doi.org/10.7291/d15d56 https://datadryad.org/stash/dataset/doi:10.7291/D15D56 |
| Summary: | Unmanned aerial system (UAS) photogrammetry offers a method that is safer for both animals and researchers and is logistically simpler than traditional weighing methods (Fiori et al. 2017). Additionally, UAS photogrammetry facilitates larger sample sizes because it allows measurement at larger spatial scales, thereby increasing statistical power (Sweeney et al. 2015). However, UAS photogrammetry requires calibration and validation prior to use in order to assess the error relative to known mass measurements. Species-specific calibration of appropriate metrics (e.g., footprint area (Christiansen et al. 2016)) is necessary to account for body shape differences (e.g., “peanut head” syndrome) (Miller et al. 2012, Joblon et al. 2014). Further, the accuracies of photographs taken in overhead and oblique positions are rarely compared due to the challenge of weighing and repeatedly photographing uniquely identified individuals (Fearnbach et al. 2018). Northern elephant seals (Mirounga angustirostris) offer a unique ... |
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