Autumn Movements and Habitat Use by Wood Ducks in Southern Illinois

1979 ◽  
Vol 43 (1) ◽  
pp. 102 ◽  
Author(s):  
Delbert E. Parr ◽  
M. Douglas Scott ◽  
David D. Kennedy
Keyword(s):  
Habitat Use ◽  
Southern Illinois ◽  
Wood Ducks

Habitat Use by Nonbreeding Wood Ducks in the Coastal Plain and Rice Prairie Region of Texas

2002 ◽  
Vol 47 (3) ◽  
pp. 486 ◽  
Author(s):  
James T. Anderson ◽  
Thomas C. Tacha
Keyword(s):  
Habitat Use ◽  
Coastal Plain ◽  
Wood Ducks

Breeding Biology of Wood Ducks Using Natural Cavities in Southern Illinois

1998 ◽  
Vol 62 (1) ◽  
pp. 112 ◽  
Author(s):  
Daniel C. Ryan ◽  
Robert J. Kawula ◽  
Robert J. Gates
Keyword(s):  
Breeding Biology ◽  
Southern Illinois ◽  
Wood Ducks

Projected Availability of Natural Cavities for Wood Ducks in Southern Illinois

2007 ◽  
Vol 71 (3) ◽  
pp. 875-883 ◽  
Author(s):  
CHARLOTTE L. ROY NIELSEN ◽  
ROBERT J. GATES ◽  
EDWARD H. ZWICKER
Keyword(s):  
Southern Illinois ◽  
Wood Ducks

scholarly journals Effects of Habitat use and Movement Patterns on Incubation Behavior of Female Wood Ducks (Aix Sponsa) in Southeast Alabama

The Auk ◽  
2003 ◽  
Vol 120 (4) ◽  
pp. 1159-1167
Author(s):  
Travis Hayes Folk ◽  
Gary R. Hepp
Keyword(s):  
Habitat Use ◽  
Incubation Period ◽  
Body Mass ◽  
Inverse Relationship ◽  
Movement Patterns ◽  
Aix Sponsa ◽  
Ephemeral Wetlands ◽  
Beaver Ponds ◽  
Incubation Behavior ◽  
Wood Ducks

Abstract We examined effects of movement patterns and habitat use of female Wood Ducks (Aix sponsa) during incubation on incubation constancy and recess frequency. Incubating females (n = 41) were equipped with subcutaneous radiotransmitters and subsequently located during daily recess events. Using compositional analysis, we determined beaver ponds, creeks, ephemeral wetlands, and lake-influenced habitats ranked higher in preference than other available aquatic habitats (i.e. managed impoundments, farm pond, and lake habitats). An inverse relationship between female use of the top four ranked habitats and recess range size suggested that those were high-quality habitats. Mean (±SE) incubation constancy (n = 40 nests) was 81.3 ± 0.8%, and females took an average of 2.2 ± 0.3 recesses day−1. Incubation period averaged 31.8 ± 0.3 days, and there was a weak inverse relationship between incubation period and incubation constancy. Incubating females lost 3.9 ± 0.8% of early incubation body mass, but body-mass changes were not associated with use of preferred habitats (i.e. beaver ponds, creeks, ephemeral wetlands, and lake-influenced areas). Initiation date of incubation and percentage use of preferred habitats were the most important variables describing variation in incubation constancy. Constancy declined later in the breeding season and with increased use of preferred habitats. Recess frequency decreased with increasing variation in distances that females traveled from the nest. Wood Ducks nesting at southern latitudes generally are not energetically constrained during incubation, and nest attentiveness is only weakly associated with incubation period. We would expect stronger relationships between habitat use, body-mass dynamics, and incubation behavior under environmental conditions that are more severe or less predictable.

Population organisation in reef sharks: new variations in coastal habitat use by mobile marine predators

2016 ◽  
Vol 544 ◽  
pp. 197-211 ◽  
Author(s):  
A Chin ◽  
MR Heupel ◽  
CA Simpfendorfer ◽  
AJ Tobin
Keyword(s):  
Habitat Use ◽  
Coastal Habitat ◽  
Marine Predators ◽  
Reef Sharks

Habitat use of toothed whales in a marine protected area based on point process models

2019 ◽  
Vol 609 ◽  
pp. 239-256 ◽  
Author(s):  
TL Silva ◽  
G Fay ◽  
TA Mooney ◽  
J Robbins ◽  
MT Weinrich ◽  
...  
Keyword(s):  
Habitat Use ◽  
Point Process ◽  
Protected Area ◽  
Marine Protected Area ◽  
Process Models ◽  
Point Process Models

Modeling cetacean habitat use in an urban coastal area in southeastern Brazil

2020 ◽  
Vol 642 ◽  
pp. 227-240
Author(s):  
L Lodi ◽  
R Tardin ◽  
G Maricato
Keyword(s):  
Habitat Use ◽  
Protected Areas ◽  
Linear Models ◽  
Anthropogenic Activities ◽  
Buffer Zone ◽  
Humpback Whales ◽  
Southeastern Brazil ◽  
Major Influence ◽  
Cetacean Species ◽  
Few Data

Most studies of cetacean habitat use do not consider the influence of anthropogenic activities. We investigated the influence of environmental and anthropogenic variables on habitat use by humpback Megaptera novaeangliae and Bryde’s whales Balaenoptera brydei off the coast of the Brazilian city of Rio de Janeiro. Although there are 2 marine protected areas (MPAs) in this area, few data are available on cetacean habitat use or on the overlap of different cetacean species within these MPAs. Our aim was to evaluate the effectiveness of the MPAs and propose a buffer zone to better protect the biodiversity of the study area. We conducted systematic surveys and developed spatial eigenvector generalized linear models to characterize habitat use by the species in the study area. Habitat use by humpback whales was influenced only by depth, whereas for Bryde’s whales there was the additional influence of anthropogenic variables. For Bryde’s whales, which use the area for feeding, sea surface temperature and the distance to anchorages had a major influence on habitat use. We also showed that neither of the MPAs in the study area adequately protects the hotspots of either whale species. Most of the humpback whale grid cells with high sighting predictions were located within 2 km of the MPAs, while areas of high sighting prediction of Bryde’s whales were located up to 5 km from the MPAs, closer to beaches. Our findings provide important insights for the delimitation of protected areas and zoning of the MPAs.

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