Bibliography Record
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Littles, Chanda J.; Bonde, Robert K.; Butler, Susan M.; Jacoby, Charles A.; Notestein, Skye K.; Reid, James P.; Slone, Daniel H.; Frazer, Thomas K.
(detail)
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2019 |
Coastal habitat change and marine megafauna behavior: Florida manatees encountering reduced food provisions in a prominent winter refuge.
Endangered Species Research 38: 29-43. 3 tabs. 6 figs. DOI: https://doi.org/10.3354/esr00933 Jan. 24, 2019.
–ABSTRACT: A decline in submerged aquatic vegetation (SAV) within Florida's spring-fed, thermal refuges raises questions about how these systems support winter foraging of Florida manatees Trichechus manatus latirostris. We analyzed telemetry data for 12 manatees over 7 years to assess their use of Kings Bay, a winter refuge with diminished SAV. After accounting for the effect of water temperature, we hypothesized that the number of trips out of Kings Bay would increase and the time wintering manatees spent in Kings Bay would decrease. Trips out of and into Kings Bay also were compared to assess potential influences on exiting or entering. There were no detectable differences in the number of trips out of the bay or overall time manatees spent in Kings Bay across winters. The percentage of time water temperatures were below 20oC was the single best predictor of increased time spent in Kings Bay. Trips out of Kings Bay were more likely to occur after 12:00 h and during a high but ebbing tide, compared to trips into the bay. Nine manatees tracked for longer than 75 days in winter spent 7–57% of their time in the Gulf of Mexico, and 3 of these manatees spent 7–65% of the winter >80 km from the mouth of Kings Bay. Results suggest the low amount of SAV in Kings Bay does not obviate its use by manatees, though there are likely tradeoffs for manatees regularly foraging elsewhere. Accounting for movements of Florida manatees through a network of habitats may improve management strategies and facilitate desirable conservation outcomes.
Note correction on website: "February 22, 2019: Substantial changes were made throughout the article after publication: to the text, Tables 1 & 2, and Fig. 4 (see .pdf 'Original text with edits')."
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Related Index Records (5)
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Behavior, Shelter-seeking or Escape
(SEE ALSO: Hunting and Capture; Migration and Movements; Natural Death or Injury; Temperature, Effects of)
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2019 |
Littles et al. (TML; Florida; movements in and out of winter refuge) |
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Florida
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2019 |
Littles et al. (TML; Kings Bay; movements in and out of winter refuge) |
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Migration and Movements
(SEE ALSO: Behavior, Aggregative; Behavior, Shelter-seeking; Locomotion; Temperature, Effects of)
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2019 |
Littles et al. (TML; Florida; movements in and out of winter refuge) |
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Temperature, Effects of
(SEE ALSO: Behavior, Shelter-seeking or Escape; Migration & Movements; Natural Death or Injury; Pollution, Effects of; Thermoregulation)
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2019 |
Littles et al. (TML; Florida; movements in and out of winter refuge) |
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Trichechus manatus latirostris (Harlan, 1824) Hatt, 1934
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2019 |
Littles et al. (Florida; movements in and out of winter refuge) |
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