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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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A fine-scale marine mammal movement model for assessing long-term aggregate noise exposure. Ecol Modell 2022. [DOI: 10.1016/j.ecolmodel.2021.109798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Pirotta E, Schwarz LK, Costa DP, Robinson PW, New L. Modeling the functional link between movement, feeding activity, and condition in a marine predator. Behav Ecol 2018. [DOI: 10.1093/beheco/ary183] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
The ability to quantify animals’ feeding activity and the resulting changes in their body condition as they move in the environment is fundamental to our understanding of a population’s ecology. We use satellite tracking data from northern elephant seals (Mirounga angustirostris), paired with simultaneous diving information, to develop a Bayesian state-space model that concurrently estimates an individual’s location, feeding activity, and changes in condition. The model identifies important foraging areas and times, the relative amount of feeding occurring therein, and thus the different behavioral strategies in which the seals engage. The fitness implications of these strategies can be assessed by looking at the resulting variation in individuals’ condition, which in turn affects the condition and survival of their offspring. Therefore, our results shed light on the processes affecting an individual’s decision-making as it moves and feeds in the environment. In addition, we demonstrate how the model can be used to simulate realistic patterns of disturbance at different stages of the trip, and how the predicted accumulation of lipid reserves varies as a consequence. Particularly, disturbing an animal in periods of high feeding activity or shortly after leaving the colony was predicted to have the potential to lead to starvation. In contrast, an individual could compensate even for very severe disturbance if such disturbance occurred outside the main foraging grounds. Our modeling approach is applicable to marine mammal species that perform drift dives and can be extended to other species where an individual’s buoyancy can be inferred from its diving behavior.
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Affiliation(s)
- Enrico Pirotta
- Department of Mathematics and Statistics, Washington State University, Vancouver, WA, USA
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland
| | - Lisa K Schwarz
- Institute of Marine Sciences, University of California, Santa Cruz, CA, USA
| | - Daniel P Costa
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA
| | - Patrick W Robinson
- Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, USA
| | - Leslie New
- Department of Mathematics and Statistics, Washington State University, Vancouver, WA, USA
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McClintock BT, London JM, Cameron MF, Boveng PL. Bridging the gaps in animal movement: hidden behaviors and ecological relationships revealed by integrated data streams. Ecosphere 2017. [DOI: 10.1002/ecs2.1751] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Brett T. McClintock
- Marine Mammal Laboratory; Alaska Fisheries Science Center; NOAA-NMFS; 7600 Sand Point Way NE Seattle Washington 98115 USA
| | - Joshua M. London
- Marine Mammal Laboratory; Alaska Fisheries Science Center; NOAA-NMFS; 7600 Sand Point Way NE Seattle Washington 98115 USA
| | - Michael F. Cameron
- Marine Mammal Laboratory; Alaska Fisheries Science Center; NOAA-NMFS; 7600 Sand Point Way NE Seattle Washington 98115 USA
| | - Peter L. Boveng
- Marine Mammal Laboratory; Alaska Fisheries Science Center; NOAA-NMFS; 7600 Sand Point Way NE Seattle Washington 98115 USA
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