Table 1.
Published results regarding the feeding behaviors of crocodilians.
Figure 1.
Study sites and capture locations.
A) Map of southeastern United States, study areas are labeled by black boxes. B) Map of Guana Lake. C) Map of Merritt Island National Wildlife Refuge (MINWR). Red circles indicate capture and release locations of American alligators outfitted with Crittercam units. All image data was sourced from USGS National Map Viewer: http://viewer.nationalmap.gov/viewer/. Maps were created with Grass GIS analysis software (CC-BY-SA): http://grass.osgeo.org/.
Figure 2.
Crittercam unit attached to American alligator.
Photograph of a 2.6 meter male American alligator (Alligator mississippiensis) with Crittercam unit attached. Reprinted with permission from J.C. Nifong.
Figure 3.
Alligator prey-attack frequency and prey-capture success.
Estimated effects of A) time of day (Morning [0400–0900], Day [0900–1800], Evening [1800–2200], and Night [2200–0400]) on frequency of prey attacks from best fit Poisson GLM, B) time of day (Morning [0400–0900], Day [0900–1800], Evening [1800–2200], and Night [2200–0400]), and C) water column position prior to attack (submerged or surface) on the probability of prey-capture success. Bars are mean estimates and error bars Wald 95% Confidence Intervals. The dashed line is the overall mean frequency of prey attacks predicted by our null GLM.
Table 2.
AIC values for Poisson GLMs, predicting prey-capture attempt frequency.
Table 3.
AIC values for logistical GLMs, predicting the probability of prey-capture success.
Figure 4.
Pie-charts of proportion of alligators spent time performing basic activities during A) all recordings, B) Morning (0400–0900), C) Day (0900–1800), D) Evening (1800–2200), and E) Night (2200–0400). Proportions are calculated as the sum of elapsed time performing an activity divided by the total time of video recordings during each time interval.
Table 4.
Two sided P-values from random permutation test for independence of proportion spent performing activities from time of day.