Publications
FORT scientists have produced more than 2000 peer reviewed publications that are registered in the USGS Publications Warehouse, along with many others prior to their work at the USGS or in conjunction with other government agencies.
Filter Total Items: 2404
SALMOD: A population model for salmonids: user's manual. Version W3 SALMOD: A population model for salmonids: user's manual. Version W3
SALMOD is a computer model that simulates the dynamics of freshwater salmonid populations, both anadromous and resident. The conceptual model was developed in a workshop setting (Williamson et al. 1993) using fish experts concerned with Trinity River chinook restoration. The model builds on the foundation laid by similar models (see Cheslak and Jacobson 1990). The model’s premise that...
Authors
John Bartholow, John Heasley, Jeff Laake, Jeff Sandelin, Beth A.K. Coughlan, Alan Moos
Systematics of Myotis occultus (Chiroptera: Vespertilionidae) inferred from sequences of two mitochondrial genes Systematics of Myotis occultus (Chiroptera: Vespertilionidae) inferred from sequences of two mitochondrial genes
The systematic relationship between Myotis lucifugus carissima and Myotis occultus has been the subject of multiple studies. Although several studies, including a recent allozyme study, concluded that M. occultus is a subspecies of M. lucifugus, this view has not been universally accepted. We reexamined the relationships of these 2 taxa by sequencing the mitochondrial cytochrome-b (cyt-b...
Authors
A.J. Piaggio, E.W. Valdez, M.A. Bogan, G.S. Spicer
A new species of Echinosaura (Gymnophthalmidae) from Ecuador and Colombia with comments on other members of the genus and Teuchocercus keyi A new species of Echinosaura (Gymnophthalmidae) from Ecuador and Colombia with comments on other members of the genus and Teuchocercus keyi
A new species of the genus Echinosaura is described from the Pacific drainages of northern Ecuador and adjacent Colombia. Evaluation of variation among congeners justifies their recognition as distinct species instead of subspecies as previously proposed. The new lizard occurs in close proximity to Echinosaura horrida and Teuchocercus keyi.
Authors
T. H. Fritts, A. Almendariz, S. Samec
Long-term ecosystem studies in Isle Royale, Olympic, and Rocky Mountain National Parks; Noatak National Preserve, and Fraser Experimental Forest; Noatak National Preserve, and Fraser Experimental Forest. Research Report no. 95 Long-term ecosystem studies in Isle Royale, Olympic, and Rocky Mountain National Parks; Noatak National Preserve, and Fraser Experimental Forest; Noatak National Preserve, and Fraser Experimental Forest. Research Report no. 95
No abstract available.
Authors
R. Stottlemyer, Jill Baron, R. Edmonds, L. Scherbarth, Heidi Steltzer
What records have we been breaking? What records have we been breaking?
"Today was another record-breaking day," the evening radio or television declares. High temperatures, low temperatures, floods, drought - take your choice. But how can we put these pronouncements in perspective? What do they really mean? We present two types of information in this article: 1) an analysis of daily air temperature and precipitation for Fort Collins and 2) an analysis of...
Authors
J.M. Bartholow, R. Milhous
Influences of spatial and temporal variation on fish-habitat relationships defined by regression quantiles Influences of spatial and temporal variation on fish-habitat relationships defined by regression quantiles
We used regression quantiles to model potentially limiting relationships between the standing crop of cutthroat trout Oncorhynchus clarki and measures of stream channel morphology. Regression quantile models indicated that variation in fish density was inversely related to the width:depth ratio of streams but not to stream width or depth alone. The spatial and temporal stability of model
Authors
J. B. Dunham, B.S. Cade, J.W. Terrell
Taxonomic assessment of the black bear (Ursus americanus) in the eastern United States Taxonomic assessment of the black bear (Ursus americanus) in the eastern United States
The subspecific status of the Louisiana black bear (Ursus americanus luteolus) and Florida black bear (U. a. floridanus) were assessed using morphologic features to determine their distinctness in relation to one another and to the black bear (U. a. americanus). Forty-four dimensions were recorded from skulls of 125 male and 127 female adult (4.5 years or older) bears. Results showed...
Authors
M.L. Kennedy, P.K. Kennedy, M.A. Bogan, J.L. Waits
Invasive plant species: Inventory, mapping, and monitoring - A national strategy Invasive plant species: Inventory, mapping, and monitoring - A national strategy
America is under siege by invasive species of plants and animals, and by diseases. The current environmental, economic, and health-related costs of invasive species could exceed $138 billion per year-more than all other natural disasters combined. Notorious examples include West Nile virus, Dutch elm disease, chestnut blight, and purple loose- strife in the Northeast; kudzu, Brazilian...
Authors
J. Larry Ludke, Frank D’Erchia, Jan Coffelt, Leanne Hanson
Planning for the conservation and development of infrastructure resources in urban areas-Colorado front range urban corridor: Things planners, decision-makers, and the public should know Planning for the conservation and development of infrastructure resources in urban areas-Colorado front range urban corridor: Things planners, decision-makers, and the public should know
This Circular provides a basic understanding of the characteristics, location, distribution, and quality of infrastructure resources (natural aggregate, energy, and water) in the Colorado Front Range urban corridor between Denver and Ft. Collins. With this understanding, the reader explores the many factors that affect the current and future availability of those resources, including the
Authors
Belinda F. Arbogast, L. Rick Arnold, Neil S. Fishman, William H. Langer, Carol S. Mladinich, James E. Roelle, David R. Wilburn
Attitudes, values and perceptions of National Wildlife Refuge managers and biologists Attitudes, values and perceptions of National Wildlife Refuge managers and biologists
No abstract available.
Authors
Ayeisha A. Brinson