Survival of Mallard broods in Benton Lake National Wildlife Refuge in north central Montana
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Abstract
We estimated duckling survival in broods of 31 radio-marked female mallards (Anas platyrhynchos) on Benton Lake National Wildlife Refuge (NWR) in northcentral Montana in 1985 and 1986. Overall survival for the 60-day prefledging period was 0.3951, and 87% of all duckling losses occurred within the first 18 days. Survival through the Class I interval (0.4664) was lower (P < 0.05) than through Class II (0.8887) and Class III (0.9531). Total brood loss occurred among 37% of the females and accounted for 60% of all duckling losses. Broods that survived to fledging averaged 5.0 ducklings. The 60-day survival probability (0.4417) of ducklings in broods that hatched early (on or before 10 Jun) was higher (P < 0.05) than survival of late broods (0.3324). Apparent brood size did not differ (P > 0.05) between marked and unmarked adult females.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Survival of Mallard broods in Benton Lake National Wildlife Refuge in north central Montana |
| Series title | Journal of Wildlife Management |
| DOI | 10.2307/3808901 |
| Volume | 54 |
| Issue | 1 |
| Year Published | 1990 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Western Ecological Research Center |
| Description | 5 p. |
| First page | 62 |
| Last page | 66 |
| Country | United States |
| State | Montana |
| Other Geospatial | Benton Lake National Wildlife Refuge |
| Google Analytic Metrics | Metrics page |