Reduced fecundity in small populations of the rare plant Gentianopsis ciliate (Gentianaceae)
M. Kery, D. Matthies
2004, Plant Biology (6) 683-688
Habitat destruction is the main cause for the biodiversity crisis. Surviving populations are often fragmented, i.e., small and isolated from each other. Reproduction of plants in small populations is often reduced, and this has been attributed to inbreeding depression, reduced attractiveness for pollinators, and reduced habitat quality in small populations....
Contaminant exposure and reproductive success of Ospreys (Pandion haliaetus) nesting in Chesapeake Bay regions of concern
Barnett A. Rattner, P. C. McGowan, N. H. Golden, Jeff S. Hatfield, P. C. Toschik, R.F. Lukei Jr., R. C. Hale, I. Schmitz-Afonso, C.P. Rice
2004, Archives of Environmental Contamination and Toxicology (47) 126-140
The Chesapeake Bay osprey population has more than doubled in size since restrictions were placed on the production and use of DDT and other toxic organochlorine contaminants in the 1970s. Ospreys are now nesting in the most highly polluted portions of the Bay. In 2000 and 2001, contaminant exposure and...
Susceptibility of the leaf-eating beetle, Galerucella calmariensis, a biological control agent for purple loosestrife (Lythrum salcaria), to three mosquito control larvicides
T. P. Lowe, T.D. Hershberger
2004, Environmental Toxicology and Chemistry (23) 1662-1671
We evaluated the susceptibility of Galerucella calmariensis, a species used to control purple loosestrife (Lythrum salicaria), to three mosquito control larvicides. Larvae and adults were fed loosestrife cuttings dipped in Abate? (<375 g?L-1), Altosid? (<250 g?L-1), and Bacillus thuringiensis var israeliensis (Bti) (<110 g?L-1). Eggs on cuttings were...
Assessing the fit of site-occupancy models
D.I. MacKenzie, L.L. Bailey
2004, Journal of Agricultural, Biological, and Environmental Statistics (9) 300-318
Few species are likely to be so evident that they will always be detected at a site when present. Recently a model has been developed that enables estimation of the proportion of area occupied, when the target species is not detected with certainty. Here we apply this modeling approach to...
Effects of management practices on grassland birds: Greater Sage-Grouse
Mary M. Rowland
2004, Report
Information on the habitat requirements and effects of habitat management on Greater Sage-Grouse was summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the current range of Greater Sage-Grouse (adapted from Schroeder et al. 2004). Although birds may be observed outside...
Effects of management practices on grassland birds: Golden eagle
John P. DeLong
2004, Report, Effects of management practices on grassland birds
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to the breeding, year-round, and nonbreeding ranges in the United States and southern Canada. Although birds frequently are observed outside...
Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
Matthew C. Perry, editor(s)
2004, Information and Technology Report 2004-0005.
The symposium 'Mute Swans and their Chesapeake Bay Habitats,' held on June 7, 2001, provided a forum for biologists and managers to share research findings and management ideas concerning the exotic and invasive mute swan (Cygnus olar). This species has been increasing in population size and is considered by...
Cryptotis meridensis
N. Woodman, A. D’az de Pascual
2004, Mammalian Species 1-5
No abstract available....
A guide to constructing and understanding synonymies for mammalian species
A. L. Gardner, V. Hayssen
2004, Mammalian Species No. 739
No abstract available....
On the relationships of 'Marmosa' formosa Shamel, 1930 (Marsupialia: Didelphidae), a phylogenetic puzzle from the Chaco of northern Argentina
Robert S. Voss, Afred L. Gardner, Sharon A. Jansa
2004, Report
The holotype and only known specimen of Marmosa formosa Shamel, a nominal species currently synonymized with Gracilinanus agilis Burmeister, is strikingly unlike any other known didelphid marsupial. Phylogenetic analyses based on nonmolecular characters and IRBP sequences suggest that formosa is either the sister-taxon of Thylamys (including Lestodelphys) or Monodelphis. Because...
Water-quality and amphibian population data for Maryland, Washington, D.C., and Virginia, 2001-2004
K.C. Rice, R.E. Jung
2004, Open-File Report 2004-1401.
Data on the chemical composition of water and on amphibian populations were collected at least annually from vernal pool and stream sites in Maryland, Washington, D.C., and Virginia, from 2001 through 2004. The data were collected as part of long-term monitoring projects of the Northeast Region of the Amphibian Research...
Population dynamics of the California Spotted Owl (Strix occidentalis occidentalis): a meta-analysis
A.B. Franklin, R. J. Gutierrez, J.D. Nichols, M.E. Seamans, Gary C. White, G.S. Zimmerman, J.E. Hines, T.E. Munton, W.S. LaHaye, J.A. Blakesley, G.N. Steger, B.R. Noon, D.W.H. Shaw, J.J. Keane, T. L. McDonald, S. Britting
2004, Ornithological Monographs No. 54.
We conducted a meta-analysis to provide a current assessment of the population characteristics of California Spotted Owls (Strix occidentalis occidentalis) resident on four study areas in the Sierra Nevada and one study area in southern California. Our meta-analysis followed rigorous a priori analysis protocols, which we derived through extensive...
Invasive herbivory: resident Canada geese and the decline of wild rice along the tidal Patuxent River
G. Michael Haramis, Gregory D. Kearns
Matthew C. Perry, editor(s)
2004, Book chapter, Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
While concern grows over the increasing numbers of exotic mute swans (Cygnus olor) on the Chesapeake Bay, less attention seems to be given to the highly familiar and native Canada goose (Branta canadensis) which has over time developed unprecedented nonmigratory, or resident, populations. Although nuisance flocks of Canada geese have...
Food habits of mute swans in the Chesapeake Bay
Matthew C. Perry, P.C. Osenton, E.J.R. Lohnes
Matthew C. Perry, editor(s)
2004, Book chapter, Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
Unlike the tundra swan (Cygnus columbianus) that migrate to the Bay for the winter, the mute swan (Cygnus olor) is a year long resident and therefore has raised concerns among research managers over reports of conflicts with nesting native water birds and the consumption of submerged aquatic vegetation (SAV)....
Some consequences of using counts of birds banded as indices to populations
J.R. Sauer, W.A. Link
C. John Ralph, Erica H. Dunn, editor(s)
2004, Book chapter, Monitoring bird populations with mist nets
In mist-net studies, it is often difficult to use capture-recapture methods to estimate number of birds present. Many investigators use number of birds captured as an index of population size. We investigate the consequences of using indices of bird abundance as surrogates for population size in hypothesis tests....
Modeling survival and movement of resident giant Canada goose populations in the Atlantic flyway
M.W. Miller, W. L. Kendall, J.B. Hestbeck
Timothy J. Moser, Ricky D. Lien, Kurt C. VerCauterren, Kenneth F. Abraham, David E. Andersen, John G. Bruggink, John M. Coluccy, David A. Graber, James O. Leafloor, David R. Luukkonen, Robert E. Trost, editor(s)
2004, Book chapter, Proceedings of the 2003 International Canada Goose Symposium: papers, abstracts, and posters from the Symposium held in Madison, Wisconsin, 19-21 March 2003
Distribution of resident giant Canada geese (Branta canadensis maxima) has changed markedly in the Atlantic Flyway in recent decades. This change may be related to habitat variation or to changes in hunting regulations. We attempt to assess impacts of hunting regulations on survival, movement, and harvest rate of...
On the use of capture-recapture models in mist-net studies
W. L. Kendall, J.R. Sauer, J.D. Nichols, R. Pradel, J.E. Hines
C. John Ralph, Erica H. Dunn, editor(s)
2004, Book chapter, Monitoring bird populations with mist nets
Capture-recapture models provide a statistical framework for estimating population parameters from mist-net data. Although Cormack-Jolly-Seber and related models have recently been used to estimate survival rates of birds sampled with mist nets, we believe that the full potential for use of capture-recapture models has not been realized by many researchers...
Foreword: Ornithological nomenclature
R.C. Banks
Josep del Hoyo, Andrew Elliott, David Christie, editor(s)
2004, Book chapter, Handbook of Birds of the World, v. 9, Cotingas to Pipits and Wagtails
Houston toad (Bufo houstonensis) in Bastrop County, Texas: need for protecting multiple subpopulations
Jeff S. Hatfield, A.H. Price, D.D. Diamond, C.D. TRUE
2004, Book chapter, Species Conservation and Management: Case Studies
Biological control of ticks
M. Samish, H. Ginsberg, I. Glazer
A.S. Bowman, P. Nuttall, editor(s)
2004, Book chapter, Ticks: Biology, Disease & Control
Ticks have numerous natural enemies, but only a few species have been evaluated as tick biocontrol agents (BCAs). Some laboratory results suggest that several bacteria are pathogenic to ticks, but their mode of action and their potential value as biocontrol agents remain to be determined. The most promising...
The mute swan, its status, behavior, and history in the U. K
E.J.R. Lohnes
Matthew C. Perry, editor(s)
2004, Book chapter, Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
For many years the mute swan has been considered a royal bird. It is a prominent resident throughout the United Kingdom (U.K.), often found on the inland waterways. Some people consider it to be a nonmigratory native bird because it doesn't tend to move large distances and doesn't often...
Long-term population studies at Patuxent Wildlife Research Refuge
P. Henry
Chris Swarth, Susan Hagood, editor(s)
2004, Book chapter, Summary of the Eastern Box Turtle Regional Conservation Workshop
Mute swans: Natural (?) environmental indicators
D. Day
Matthew C. Perry, editor(s)
2004, Book chapter, Mute swans and their Chesapeake Bay habitats: proceedings of a symposium
The rapid expansion of the Chesapeake Bay's population of feral mute swans (Cygnus olar), coupled with a dramatic Bay-wide decline in submerged aquatic vegetation (SAV), has fueled much of the current debate surrounding the need for a management plan to protect the aquatic food resources that are critical to many...
Modeling birds: an overview
Jeff S. Hatfield
2004, Book chapter, Species Conservation and Management: Case Studies
Estimating survival and movement
J.D. Nichols, W. L. Kendall, M.C. Runge
2004, Book chapter, Bird Ecology and Conservation - A Handbook of Techniques
