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Warlick AJ, Johnson DS, Gelatt TS, Converse SJ. Environmental drivers of demography and potential factors limiting the recovery of an endangered marine top predator. Ecosphere 2022. [DOI: 10.1002/ecs2.4325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Amanda J. Warlick
- School of Aquatic and Fishery Sciences University of Washington Seattle Washington USA
| | - Devin S. Johnson
- Pacific Islands Fisheries Science Center National Marine Fisheries Service Honolulu Hawaii USA
| | - Tom S. Gelatt
- Marine Mammal Laboratory Alaska Fisheries Science Center, National Marine Fisheries Service Seattle Washington USA
| | - Sarah J. Converse
- U.S. Geological Survey, Washington Cooperative Fish and Wildlife Research Unit, School of Environmental and Forest Sciences & School of Aquatic and Fishery Sciences University of Washington Seattle Washington USA
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Melaschenko NC, Hodges KE. What factors predict path tortuosity of Great Basin pocket mice in shrub-steppe habitat invaded by cheatgrass? J Mammal 2020. [DOI: 10.1093/jmammal/gyz205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Foraging animals choose habitats based on characteristics that often cannot be satisfied simultaneously, such as easy mobility, abundant or high-quality foods, and safety from predators. Invasive plants may alter habitat structure and provide novel foods; thus, measuring how animals forage in invaded landscapes offers insights into these new ecological relationships. We examined the movements of Great Basin pocket mice (Perognathus parvus) in sage-steppe habitats invaded by cheatgreass (Bromus tectorum) in southcentral British Columbia, Canada. The pathway tortuosity (fractal D) of pocket mice increased with vegetative cover and population density and decreased with open habitat, but these variables explained little of the variation in tortuosity. The fractal dimension of movement pathways of pocket mice was consistent over spatial scales ranging from 0.5 m to two-thirds of the home range size, unlike in other species where fractal dimensions are not consistent over multiple spatial scales. Collectively, our results indicate that foraging movements of pocket mice were not affected by the low densities of cheatgrass in this system.
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Affiliation(s)
| | - Karen E Hodges
- University of British Columbia Okanagan, Department of Biology, Kelowna B.C
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Lander ME, Fadely BS, Gelatt TS, Sterling JT, Johnson DS, Pelland NA. Mixing it up in Alaska: Habitat use of adult female Steller sea lions reveals a variety of foraging strategies. Ecosphere 2020. [DOI: 10.1002/ecs2.3021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Michelle E. Lander
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
| | - Brian S. Fadely
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
| | - Thomas S. Gelatt
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
| | - Jeremy T. Sterling
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
| | - Devin S. Johnson
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
| | - Noel A. Pelland
- Marine Mammal Laboratory Alaska Fisheries Science Center National Marine Fisheries Service National Oceanic and Atmospheric Administration Seattle Washington 98115 USA
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Bouchet PJ, Meeuwig JJ, Salgado Kent CP, Letessier TB, Jenner CK. Topographic determinants of mobile vertebrate predator hotspots: current knowledge and future directions. Biol Rev Camb Philos Soc 2014; 90:699-728. [DOI: 10.1111/brv.12130] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 06/22/2014] [Accepted: 06/23/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Phil J. Bouchet
- The UWA Oceans Institute, School of Animal Biology, The University of Western Australia; Crawley Western Australia 6009 Australia
| | - Jessica J. Meeuwig
- The UWA Oceans Institute, School of Animal Biology, The University of Western Australia; Crawley Western Australia 6009 Australia
- Centre for Marine Futures, The University of Western Australia; Crawley Western Australia 6009 Australia
| | - Chandra P. Salgado Kent
- Centre for Marine Science and Technology, Curtin University; Perth Western Australia 6845 Australia
| | - Tom B. Letessier
- Centre for Marine Futures, The University of Western Australia; Crawley Western Australia 6009 Australia
| | - Curt K. Jenner
- Centre for Whale Research (WA) Inc.; Fremantle Western Australia 6959 Australia
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Fractal geometry for animal biometrics: a response to Kühl and Burghardt. Trends Ecol Evol 2013; 28:499-500. [DOI: 10.1016/j.tree.2013.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 06/05/2013] [Accepted: 06/06/2013] [Indexed: 11/23/2022]
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