DeAngelis, D. L.
The objectives of this project are the following:
1. To monitor the status of the snail kite population trends in central and southern Florida.
2. To provide estimates of demographic parameters for the spatially explicit individual-based model in ATLSS.
3. To collaborate with Dr. Wolf Mooij of the Netherlands Institute of Ecology to use snail kite data to validate the snail kite model, EVERKITE
U.S. Department of Agriculture - Natural Resources Conservation Service (NRCS) Department of the Interior - U.S. Geological Survey Department of Commerce - National Oceanic and Atmospheric Administration (NOAA) Environmental Protection Agency (EPA) Smithsonian Institution - National Museum of Natural History (NMNH)
Bennetts, R. E., DeAngelis, D. L.
J. W. Porter and K. G. Porter, eds.
Burnham, K. P., Clobert, J., Anderson, D. R.
Hines, J. E., Lebreton, J. D., Pradel, R
Curnutt, John, Gross, Louis
Collopy, M. W., Rodgers, Jr., J. A.
Davis, S. M. And Ogden, J. C, eds.
Kitchens, W. M., Dreitz, V. J.
Bennetts, R. E., DeAngelis, D. L., Kitchens, W. M.
Nichols, J. D., Hines, J. E., Bennetts, R. E., Kitchens, W. M., DeAngelis, D. L.
Bennetts, R. E., Toland, B., Kitchens, W. M., Collopy, M. W.
Link, W. A., Sauer, J. A., Sykes, P. W.
Dreitz, V. J., Kitchens, W. M., Hines, J. E., Nichols, J. D.
Kitchens, W. M.
Golden, K., Dreitz, V. J., Kitchens, W. M.
Shannon, M. R., Kitchens, W. M.
Bennetts, R. E., Kitchens, W. M.
Kitchens, W. M.
During the sampling period, the entire study area was surveyed on 6 separate 2 to 3-week sampling occasions. Except for the repetitive sources, the format of the surveys was similar to the quasi-systematic transects conducted by airboat for the annual surveys. However, specific survey methodology depended on size, water levels, and vegetation structure in the individual wetland units. During each 2 to 3-week sampling occasion, we categorized and recorded an individual as 1) 'marked' if the bird had a colored leg band with a distinct letter/number combination so that individuals could be identified, 2) 'unmarked' if no leg bands were present or if birds were banded with only a USFWS band or color band without a letter/number combination, or 3) 'unknown' if the banding status was not determined.
Initially, it was hoped that resighting data could be used with capture-recapture models for closed populations because of the ability to model sources of variation in capture probability with these models. Thus, the first step in the analyses was testing for demographic closure. The closure test implemented in program CAPTURE and program CLOSTEST were used to test the assumption of demographic closure of the sampled population. The closure test in CAPTURE is unaffected by heterogeneity in resighting probabilities; however, it is insensitive to temporary violation of closure occurring during the middle of the sampling period. While program CLOSTEST is more robust to time-specific variation in resighting probabilities in the absence of behavioral or individual heterogeneity, its use is recommended in conjunction with the closure test in program CAPTURE in order to better detect closure violations in resighting data sets.
1. Monitoring the status of the snail kite populaiton trends in central and southern Florida 2. Providing estimates of demographic parameteres for the spatially explicit individual-based model in ATLSS 3. Continued collaboration with W. Mooij of the Netherlands Institute of Ecology to use snail kite data to validate the snail kite model EVERKITE
U.S. Department of the Interior, U.S. Geological Survey, Center for
Coastal Geology
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