Survival of female black ducks, Anas rubripes, during the breeding season

J.K. Ringelman; J. R. Longcore

Home/Archive/USGS

USGS · 5221826

Survival of female black ducks, Anas rubripes, during the breeding season

J.K. Ringelman·J. R. Longcore

View original source ↗Export metadata ↓

Abstract

The Mayfield method was used to estimate the survival rate of 19 radio-marked, female Black Ducks (Anas rubripes) in southcentral Maine during 1977-80. An overall survival rate of 0.74 was estimated for the 121-day monitoring period that included the pre-laying and laying, incubation, brood rearing, and post-rearing stages. No differences in survival rates were detected among these stages. Two instrumented hens were killed by Red-shouldered Hawks (Buteo lineatus) and a third was killed by an unknown predator. We found no evidence that the attachment of radio transmitters affected hen survival.

Explore related subjects

Canadian Field-Naturalist Article

Keep this discovery

Explore connections, maps & timelines

BibTeX RIS

J.K. Ringelman, J. R. Longcore. 1983. Survival of female black ducks, Anas rubripes, during the breeding season. https://pubs.usgs.gov/publication/5221826

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related USGS reports

USGS2024

An observation of incest avoidance in Gray Wolf (Canis lupus)

Free-ranging Gray Wolf ( Canis lupus ) tends to avoid inbreeding, but there is no information about how they manage this avoidance. Our observation of a female wolf in Yellowstone National Park actively rebuffing her father’s sexual advances but then copulating with a distantly related male is the first and only report of one means by which wolf pack members avoid inbreeding.

Wyoming↗

USGS2019

Gray Wolf (Canis lupus) recolonization failure: A Minnesota case study

During the past few decades, Gray Wolves ( Canis lupus ) have recolonized many areas in the United States and Europe. In many other cases, however, although dispersing wolves reached areas with adequate prey, a population failed to recolonize. Herein, we provide a case study detailing how a wolf pack attempted for three years to recolonize an area 55 km from a long-established population and within 25 km of Minneapolis and St. Paul, Minnesota, but failed. The pack produced three litters of pups and at one time included 11–19 members, but it preyed on livestock and dogs and, consequently, was lethally removed. The history of this pack’s attempt to recolonize an area long devoid of wolves exemplifies the issues that have prevented earlier recolonizations in non-wild lands in Minnesota and elsewhere and that promise to do so well into the future.

Minnesota↗

USGS2017

Extinguishing a learned response in a free-ranging gray wolf (Canis lupus)

A free-ranging Gray Wolf (Canis lupus), habituated to human presence (the author) on Ellesmere Island, Canada, learned to anticipate experimental feeding by a human, became impatient, persistent, and bold and exhibited stalking behaviour toward the food source. Only after the author offered the wolf about 90 clumps of dry soil over a period of 45 minutes in three bouts, did the wolf give up this behaviour. To my knowledge, this is the first example of extinguishing a learned response in a free-ranging wolf and provides new insight into the learning behaviour of such animals.

Ellesmere Island↗