Incidence of embedded shot in canvasbacks
No abstract available.
Illinois, Maryland, North Dakota, Wisconsin↗
Geology topics
J.W. Artmann
Publications and source records attributed to J.W. Artmann.
Identification of potential harvest units in the United States of the American woodcock
Potential harvest units were examined in the United States for American woodcock (Philohela minor) based on the distribution of both direct and indirect recoveries of preseason bandings. Unweighted and weighted recoveries were used to definefour sets of units with a minimal interchange of birds. With a configuration that conforms to the existing boundary between the Atlantic and Mississippi waterfowl flyways, an average of only 3.0 percent unweighted and 4.4 percent weighted recoveries occurred outside of the respective unit. Even though another configuration showed 1.1 percent less crossover, the use of the existing flyway boundary would be more logical from a management standpoint. Identification and use of harvest units for woodcock will allow better management of the resource as regional differences in the two populations become more apparent.
Book chapter↗
Incidence of ingested lead shot in sora rails
Gizzards of 934 sora rails ( Porzana carolina ) collected in Maryland (767) and Missouri (167) were examined for ingested shot. Ingested shot were found in 12.3 percent of the Maryland sample and 1.8 percent of the Missouri birds. Individual Maryland birds had ingested up to 28 pellets. None of the lead pellets examined was larger than a No. 7 1/2 shot. Maryland ingestion rates did not differ by age or sex, but significant differences between collection areas, groups of years, and collection periods within years were indicated. This exploratory work points out a potential lead poisoning problem among sora rails.
Maryland↗