Life history and identification of Salvinia species, a floating, rootless tree fern and a noxious aquatic weed. Site includes posters, instructions on submitting sightings, how to subscribe to a listserv on the weed, and a bibliography.
Overview of the Southeastern Amphibian Research and Monitoring Initiative, annual report, field methods and protocols, statistical design and analysis, glossary, projects, and lists of frogs, toads and salamanders.
This report is major publication on national biological resources that compiles and presents status and trends information for use by resource managers and the public. Presents detail information on ecosystems, plants, and animals.
Report on the population of northern pintails between 1979 and the 1990s in Sacramento Valley, California, including methods of study including radio telemetry, causes of mortality, morphometrics, survival rates, and management implications.