Wood Duck Brood Movements and Habitat Use on Prairie Rivers in South Dakota

Movements and Fledging Success of Snowy Plover (Charadrius alexandrinus) Chicks

“…However, other species, moved longer distances to brood-rearing areas, often several kilometers away from the nest. Average distance moved by young Northern Lapwing (Vanellus vanellus; Blomqvist and Johansson 1995), Pied Avocet (Recurvirostra avosetta; Lengyel 2006), Greater Snow Goose (Chen caerulescens; Mainguy 2006), Wood Duck (Aix sponsa; Granfors and Flake 1999) and Mallard (Anas platyrhynchos; Yerkes 2001) greatly exceed the average daily distance moved (216 ± 12m) by Snowy Plovers on Clam Beach. We hypothesize that this interspecific variation stems from landscape features (i.e.…”

Movements and habitat use by Red-breasted Merganser broods in eastern New Brunswick

“…Randomization procedures were used to avoid inflated Type I error rates produced by CA (Bingham andBrennan 2004, Thomas andTaylor 2006). We generated 2,500 data sets of the same size (number of broods) and number of locations as the original data but under the hypothesis of random habitat use (Pendleton et al 1998, Granfors andFlake 1999). A matrix of t-tests was constructed if nonrandom selection of habitats occurred (P Ͻ 0.05) by using differences of logratios between habitats of interest to rank habitat preferences and examine where ranks differed (Aebischer et al 1993).…”

“…Second, we compared proportions of telemetry locations that occurred in each habitat type to those within home ranges (third-order selection). Habitat availability was calculated for each brood by creating a thematic map in ArcView containing used habitats surrounding the nest within a radius equivalent to the distance between a brood's nest and its farthest location from the nest (Granfors andFlake 1999, Chouinard andArnold 2007). The thematic map was clipped in the habitat map to estimate the proportion of each habitat type available to individual broods.…”

“…Parents select wetlands where food quality and abundance are greatest to meet the nutritional requirements of developing young (Minot 1980, Talent et al 1982, and use areas that provide loafing sites for resting broods (Bengtson 1971b). Movements and habitat selection by brood-rearing females have been documented for a variety of dabbling (Anatini) and diving (Aythyini) duck species, including Mallard (Anas platyrhynchos) (Krapu et al 2006), Wood Duck (Aix sponsa) (Granfors and Flake 1999), Redhead (Aythya americana) (Yerkes 2000a, b), and Canvasback (Aythya valisineria) (Austin and Serie 1991). Few studies have investigated daily movements and patterns of brood habitat selection by sea ducks (Mergini) breeding at inland and, in particular, at coastal sites, despite this tribe representing over 40% of duck species breeding in North America (Palmer 1976, Pöysä andVirtanen 1994).…”

“…Light shaded regions indicate intertidal flats. 1994, Granfors and Flake 1999). Habitat use may vary with brood age and result from varying physiological, nutritional, and behavioral requirements of young waterfowl from hatching to fledging (Berg 1956, Beard 1964, Rotella and Ratti 1992.…”