575 items found
Type: Text
Subjects: Rainbow trout
Formalin
Formalin
Type:Text
Subject:Rainbow trout
Formalin
Formalin
Description:Formalin is a commonly used prophalyctic antifungal and antiparasitic treatment of fish and fish eggs, yet little is known about the differential sensitivity among strains after exposure as eggs. This study seeks to determine the sensitivities (measured by mortality) of four rainbow trout strains, after first exposure to formalin as eggs, and a later exposure as fingerlings. The data is analyzed using logistic regression and a Cox proportional hazard model. Both models yield consistent conclusions; the different strains do die at different rates as fingerlings, but the egg treatment does not contribute to these differences. [show more]
Type: Article
Subjects: Feline foamy virus
Retrovirus
Cross-species transmission
Puma
Domestic cat
Recombination
Retrovirus
Cross-species transmission
Puma
Domestic cat
Recombination
Type:Article
Subject:Feline foamy virus
Retrovirus
Cross-species transmission
Puma
Domestic cat
Recombination
Retrovirus
Cross-species transmission
Puma
Domestic cat
Recombination
Description:Emerging viral outbreaks resulting from host switching is an area of continued scientific interest. Such events can result in disease epidemics or in some cases, clinically silent outcomes. These occurrences are likely relatively common and can serve as tools to better understand disease dynamics, and may result in changes in behavior, fecundity, and, ultimately survival of the host. Feline foamy virus (FFV) is a common retrovirus infecting domestic cats globally, which has also been documented in the North American puma (Puma concolor). The prevalent nature of FFV in domestic cats and its ability to infect wild felids, including puma, provides an ideal system to study cross-species transmission across trophic levels (positions in the food chain), and evolution of pathogens transmitted between individuals following direct contact. Here we present findings from an extensive molecular analysis of FFV in pumas, focused on two locations in Colorado, and in relation to FFV recovered from domestic cats in this and previous studies. Prevalence of FFV in puma was high across the two regions, ∼77 per cent (urban interface site) and ∼48 per cent (rural site). Comparison of FFV from pumas living across three states; Colorado, Florida, and California, indicates FFV is widely distributed across North America. FFV isolated from domestic cats and pumas was not distinguishable at the host level, with FFV sequences sharing >93 per cent nucleotide similarity. Phylogenetic, Bayesian, and recombination analyses of FFV across the two species supports frequent cross-species spillover from domestic cat to puma during the last century, as well as frequent puma-to-puma intraspecific transmission in Colorado, USA. Two FFV variants, distinguished by significant difference in the surface unit of the envelope protein, were commonly found in both hosts. This trait is also shared by simian foamy virus and may represent variation in cell tropism or a unique immune evasion mechanism. This study elucidates evolutionary and cross-species transmission dynamics of a highly prevalent multi-host adapted virus, a system which can further be applied to model spillover and transmission of pathogenic viruses resulting in widespread infection in the new host. [show more]
Type:
Subjects: Gold mining
Upper Arkansas River
Habitat restoration
Upper Arkansas River
Habitat restoration
Subject:Gold mining
Upper Arkansas River
Habitat restoration
Upper Arkansas River
Habitat restoration
Description:The legacy of mining and how it's still affecting the Arkansas River today. CPW used a habitat restoration project to mitigate the effects and ongoing fish population monitoring to assess the health of the river.
Type: Article
Subjects: Gold mining
Upper Arkansas River
Habitat restoration
Upper Arkansas River
Habitat restoration
Type:Article
Subject:Gold mining
Upper Arkansas River
Habitat restoration
Upper Arkansas River
Habitat restoration
Description:Over a century of metals pollution and channel disturbance associated with historical mining, land use, and water development contributed to degradation of aquatic and riparian habitat within the upper Arkansas River watershed near Leadville, Colorado. Following water quality remediation, habitat restoration was conducted for a 17.7-km reach characterized as an overwide channel that lacked velocity refuge and overwinter habitat for salmonids. The primary goals of restoration were to improve populations of Brown Trout Salmo trutta and individual fish health, with a target to increase fish metrics by 10% within 5 years after restoration. Fish metrics included Brown Trout density, biomass, quality, and relative weight, where quality was defined as the density of Brown Trout over 356 mm in length. Changes in all fish metrics were evaluated with a before-after–control-impact study design that utilized five control sites and five impact sites. Biomass was the only metric that exhibited a significant interaction between site type and period (before and after), with increases of 12% and 21% at control and impact sites, respectively. Increased density (10%) and relative weight (2.4%) were observed across all sites regardless of type. Changes at individual sites were less evident, with only one impact site showing significant increases in biomass (99%) and quality Brown Trout (306%). These results suggest that Brown Trout populations within the upper Arkansas River have continued to improve following large-scale water quality remediation and stream restoration efforts. Additional monitoring is recommended to evaluate long-term trends and inform adaptive management. [show more]
Type: Moving Image
Subjects: Fish habitat restoration
Type:Moving Image
Subject:Fish habitat restoration
Description:CPW aquatic researcher and stream restoration manager Matt Kondratieff's presentation to Dr. Myrick's FW 204 Introduction to Fisheries Biology course at CSU.
Type:
Subjects: Wildlife management -- Colorado
Big game animals -- Colorado
Game birds -- Colorado
Furbearers -- Colorado
Big game animals -- Colorado
Game birds -- Colorado
Furbearers -- Colorado
Subject:Wildlife management -- Colorado
Big game animals -- Colorado
Game birds -- Colorado
Furbearers -- Colorado
Big game animals -- Colorado
Game birds -- Colorado
Furbearers -- Colorado
Description:A series of short leaflets published by Colorado Department of Game and Fish from 1956-1959. Written by agency personnel the leaflets were intended to help staff answer questions put to them by the public.
Contents:
#1- Methods of Hunting Pheasants, by Wayne W. Sandfort (10/1/1956)
#2- Care of Big Game Hides (10/15/1956)
#3- Wild Turkey Hunting Techniques, by Martin Burgett (11/1/1956)
#4- Productivity Rates, Age Classes, and Sex Ratios of Spring-caught Beavers in Colorado, by Wm. H. Rutherford (11/15/1956)
#5- Artificial Revegetation on Big Game Winter Ranges, by Claude E. White, Jr. (12/1/1956)
#6- Some effects of Heavy Use on Browse Plants, by Harold R. Shepherd (12/15/1956)
#7- Some Sex Determinants of Game Animal Carcasses, by Richard N. Denney (1/15/1957)
#8- Warbles of Cottontail Rabbits, by R. E. Fillmore (4/15/1957)
#9- Lungworms in Colorado, by R. E. Pillmore (5/1/1957)
#10- Winter Food Plots as an Aid in Wild Turkey Management, by Donald M. Hoffman (7/15/1957)
#11- The Use of Baled Oat Hay in Winter Feeding of Wild Turkey, by C. Scott (9/1/1957)
#11A- Aging Pheasant Embryos, by Wayne W. Sandfort (9/1/1957)
#12- Origin of Bighorn Lungworms, by R. E. Pillmore (12/1/1957)
#12B- Lungworm in Bighorn Sheep, by R. E. Pilmore (1/15/1958)
#13- Buffalo Peaks Bighorn Seasons, by R. E. Pillmore (7/1/1958)
#14- Rabies and Wildlife, by R. E. Pillmore (3/15/1958)
#15- Lungworm and Lambs, by R. E. Pillmore (4/15/1958)
#16- Pheasant-Insecticide Study Report, by James Tigner (6/15/1959)
#17- New Possession Limit on Pheasants Explained, by H. Swope (10/30/1959)
Each leaflet is cataloged separately in the library catalog and available in print form at: SK 325 .G21.
Alternate title for series: Game leaflets. [show more]
Type:Text
Description:
Published under title: Game Research Report from 1963-1979. (1963-1972 published by Colorado Game Fish & Parks Dept., 1973-1979 published by Colorado Division of Wildlife.) This set contains 1963-1969.
Some quarters contain multiple volumes.
Continues: Quarterly Report (1957-1962)
Continued by: Wildlife Research Report 1980-1987 | 1988-1994 | 1995-2000
Print copy: Federal Aid binders [show more]
Type:Text
Description:
Published under title: Game Research Report from 1963-1979. (1963-1972 published by Colorado Game Fish & Parks Dept., 1973-1979 published by Colorado Division of Wildlife.) This set contains 1970-1979.
Progress reports for mammals and avian Federal Aid research. See Mammals Research: Progress Reports (1939-current) for a listing of collated reports for each mammals project (avian to be added in the future).
Some quarters contain multiple volumes.
Continues: Quarterly Report (1957-1962)
Continued by: Wildlife Research Report 1980-1987 | 1988-1994 | 1995-2000
Print copy: Federal Aid binders
[show more]ID: Genetic structure of cougar populations across the Wyoming basin: metapopulation or megapopulation
Type: Article
Subjects: Central Rocky Mountains
Cougar
Gene flow
Genetic structure
Metapopulation
Microsatellite DNA
Panmixia
<em>Puma concolor</em>
Cougar
Gene flow
Genetic structure
Metapopulation
Microsatellite DNA
Panmixia
<em>Puma concolor</em>
Type:Article
Subject:Central Rocky Mountains
Cougar
Gene flow
Genetic structure
Metapopulation
Microsatellite DNA
Panmixia
<em>Puma concolor</em>
Cougar
Gene flow
Genetic structure
Metapopulation
Microsatellite DNA
Panmixia
<em>Puma concolor</em>
Description:We examined the genetic structure of 5 Wyoming cougar (Puma concolor) populations surrounding the Wyoming Basin, as well as a population from southwestern Colorado. When using 9 microsatellite DNA loci, observed heterozygosity was similar among populations (Ho = 0.49–0.59) and intermediate to that of other large carnivores. Estimates of genetic structure (FSt = 0.028, RSt = 0.029) and number of migrants per generation (Nm) suggested high gene flow. Nm was lowest between distant populations and highest among adjacent populations. Examination of these data, plus Mantel test results of genetic versus geographic distance (P ≤ 0.01), suggested both isolation by distance and an effect of habitat matrix. Bayesian assignment to population based on individual genotypes showed that cougars in this region were best described as a single panmictic population. Total effective population size for cougars in this region ranged from 1,797 to 4,532 depending on mutation model and analytical method used. Based on measures of gene flow, extinction risk in the near future appears low. We found no support for the existence of metapopulation structure among cougars in this region. [show more]