Diet differences in Redheads from nearshore and offshore zones in Louisiana
Links
- More information: Publisher Index Page (via DOI)
- Download citation as: RIS | Dublin Core
Abstract
Habitat management decisions for diving ducks in winter are limited by the lack of information concerning their use of nearshore and offshore zones. Therefore, we compared diets of redheads (Aythya americana) collected from nearshore (n = 206) and offshore (n = 72) zones during winters at the Chandeleur Islands, Louisiana, 1987-89. A greater (P < 0.05) proportion of redheads from nearshore had food in their esophagus and proventriculus than redheads from offshore. Feeding redheads in the offshore zone consumed more (P < 0.05) animal matter (42% in esophagus) and less plant material (58%) than conspecifics feeding nearshore (13% animal, 87% plant). Contents of proventriculi showed the same trend (P < 0.05). Zone-related diet differences occurred in both sexes and in early and late winter. Food availability and nutritional needs may affect these differences.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Diet differences in Redheads from nearshore and offshore zones in Louisiana |
| Series title | Journal of Wildlife Management |
| DOI | 10.2307/3809419 |
| Volume | 57 |
| Issue | 2 |
| Year Published | 1993 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | National Wetlands Research Center, Wetland and Aquatic Research Center |
| Description | 7 p. |
| First page | 238 |
| Last page | 244 |
| Country | United States |
| State | Louisiana |
| Other Geospatial | Chandeleur Islands |
| Google Analytic Metrics | Metrics page |