Publications
Filter Total Items: 2078
Indirect facilitation of an anuran invasion by non-native fishes Indirect facilitation of an anuran invasion by non-native fishes
Positive interactions among non-native species could greatly exacerbate the problem of invasions, but are poorly studied and our knowledge of their occurrence is mostly limited to plant-pollinator and dispersal interactions. We found that invasion of bullfrogs is facilitated by the presence of co-evolved non-native fish, which increase tadpole survival by reducing predatory...
Authors
M. J. Adams, Christopher A. Pearl, R. Bruce Bury
The Willet (Catoptrophorus semipalmatus) The Willet (Catoptrophorus semipalmatus)
No abstract available.
Authors
P.M. Sanzenbacher, Susan M. Haig
Peregrine Falcon (Falco peregrinus) Peregrine Falcon (Falco peregrinus)
No abstract available.
Authors
Charles J. Henny, J.E. Pagel
Biomagnification factors (fish to osprey eggs from Willamette River, Oregon, U.S.A.) for PCDDS, PCDFS, PCBS, and OC pesticides Biomagnification factors (fish to osprey eggs from Willamette River, Oregon, U.S.A.) for PCDDS, PCDFS, PCBS, and OC pesticides
A migratory population of 78 pairs of Osprey (Pandion haliaetus) nesting along the Willamette River in westernOregon was studied in 1993. The study was designed to determinecontaminant concentrations in eggs, contaminant concentrationsin fish species predominant in the Ospreys diet, andBiomagnification Factors (BMFs) of contaminants from fish specieseaten to Osprey eggs. Ten Osprey eggs...
Authors
Charles J. Henny, James L. Kaiser, Robert A. Grove, V.R. Bentley, J. E. Elliot
Food habits of the southwestern willow flycatcher during the nesting season Food habits of the southwestern willow flycatcher during the nesting season
The food habits and prey base of the endangered Southwestern Willow Flycatcher (Empidonax traillii extimus) are not well known. We analyzed prey remains in 59 fecal samples from an intensively-studied population of this flycatcher at the Kern River Preserve in southern California. These samples were collected during the nesting season in 1996 and 1997 from adults caught in mist nets, and...
Authors
Charles A. Drost, Eben H. Paxton, Mark K. Sogge, Mary J. Whitfield
A Framework for Long-term Ecological Monitoring in Olympic National Park: Prototype for the Coniferous Forest Biome A Framework for Long-term Ecological Monitoring in Olympic National Park: Prototype for the Coniferous Forest Biome
This report is the result of a five-year collaboration between scientists of the U.S. Geological Survey Forest and Rangeland Ecosystem Science Center, Olympic Field Station, and the natural resources staff of Olympic National Park to develop a comprehensive strategy for monitoring natural resources of Olympic National Park. Olympic National Park is the National Park Serviceʼs prototype...
Authors
Kurt Jenkins, Andrea Woodward, Ed Schreiner
American kestrel (Falco sparverius) American kestrel (Falco sparverius)
No abstract available.
Authors
Charles J. Henny
Cooper's hawk (Accipter cooperii) Cooper's hawk (Accipter cooperii)
No abstract available.
Authors
Charles J. Henny
Osprey (Pandion haliaetus) Osprey (Pandion haliaetus)
No abstract available.
Authors
Charles J. Henny
Transitions in rangeland evaluations: A review of the major transitions in rangeland evaluations during the last 25 years and speculation about future evaluations Transitions in rangeland evaluations: A review of the major transitions in rangeland evaluations during the last 25 years and speculation about future evaluations
No abstract available.
Authors
David A. Pyke, Jeffrey E. Herrick
Parentage and relatedness in polyandrous comb-crested jacanas using ISSRs Parentage and relatedness in polyandrous comb-crested jacanas using ISSRs
In this article we present the first analysis of parentage and relatedness in a natural vertebrate population, using Intersimple Sequence Repeat (ISSR) markers. Thus, 28 ISSR markers were used in a study of a sex-role reversed, simultaneously polyandrous shorebird from northeastern Australia, the comb-crested jacana (Irediparra gallinacea). Assessment of parentage was based on comparison...
Authors
Susan M. Haig, Terrence R. Mace, Thomas D. Mullins
The American Avocet (Recurvirostra americana) The American Avocet (Recurvirostra americana)
No abstract available.
Authors
P.M. Sanzenbacher, Susan M. Haig