1,006 Matching Results

Search Results

Advanced search parameters have been applied.

Asian Carp and the Great Lakes Region

Description: Four species of non-indigenous Asian carp are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. Three species—bighead, silver, and black carp—are of particular note, based on the perceived degree of environmental concern. This report examines current controversy relating to what measures might be necessary and sufficient to prevent movement of Asian carp from the Mississippi River drainage into the Great Lakes through the Chicago Area Waterway System. Movement of Asian carp into the Great Lakes is ultimately of concern because increased numbers of carp in the Great Lakes increases the risk that Asian carp will establish reproducing populations in these waters. Bills have been introduced in the 111th Congress to direct actions to avoid the possibility of carp becoming established in the Great Lakes.
Date: May 25, 2010
Creator: Buck, Eugene H.; Upton, Harold F.; Stern, Charles V. & Nichols, James E.
Partner: UNT Libraries Government Documents Department

Asian Carp and the Great Lakes Region

Description: Four species of non-indigenous Asian carp are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. This report details the environmental and economic threats from this invasion, as well as ways to combat the spread of Asian carp in U.S. water.
Date: February 2, 2011
Creator: Buck, Eugene H.; Upton, Harold F.; Stern, Charles V. & Nichols, James E.
Partner: UNT Libraries Government Documents Department

Asian Carp and the Great Lakes Region

Description: This report provides an overview of four species of non-indigenous Asian carp that are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. This report details the environmental and economic threats from this invasion, as well as ways to combat the spread of Asian carp in U.S. water.
Date: August 6, 2010
Creator: Buck, Eugene H.; Upton, Harold F.; Stern, Charles V. & Nichols, James E.
Partner: UNT Libraries Government Documents Department

Asian Carp and the Great Lakes Region

Description: This report provides an overview of four species of non-indigenous Asian carp that are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. This report details the environmental and economic threats from this invasion, as well as ways to combat the spread of Asian carp in U.S. water.
Date: January 23, 2014
Creator: Stern, Charles V.; Upton, Harold F. & Brougher, Cynthia
Partner: UNT Libraries Government Documents Department

Asian Carp and the Great Lakes Region

Description: This report discusses four species of non-indigenous Asian carp that are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. Three species--bighead, silver, and black carp--are of particular note, based on the perceived degree of environmental concern. Current controversy relates to what measures might be necessary and sufficient to prevent movement of Asian carp from the Mississippi River drainage into the Great Lakes through the Chicago Area Waterway System. Bills have been introduced in the 111th Congress to direct actions to avoid the possibility of carp becoming established in the Great Lakes.
Date: November 30, 2010
Creator: Buck, Eugene H.; Upton, Harold F.; Stern, Charles V. & Nichols, James E.
Partner: UNT Libraries Government Documents Department

Asian Carp and the Great Lakes Region

Description: Four species of non-indigenous Asian carp are expanding their range in U.S. waterways, resulting in a variety of concerns and problems. This report details the environmental and economic threats from this invasion, as well as ways to combat the spread of Asian carp in U.S. water.
Date: April 15, 2011
Creator: Buck, Eugene H.; Upton, Harold F.; Stern, Charles V. & Brown, Cynthia
Partner: UNT Libraries Government Documents Department

Directing the Movement of Fish with Electricity

Description: From introduction: The Fish and Wildlife Service's Great Lakes Fishery Investigations has recently developed alternating current electrical devices which appear most promising as a means of controlling the parasitic sea lamprey in the Great Lakes.
Date: January 1953
Creator: McLain, Alberton L. & Nielsen, Willis L.
Partner: UNT Libraries Government Documents Department

[Project Summary: Offshore Petroleum Platforms: Functional Significance for Larval Fish Across Longituinal and Latitudinal Gradients]

Description: Summary describing the work completed at Louisiana State University Coastal Fisheries Institute for 'Offshore Petroleum Platforms: Functional Significance for Larval Fish Across Longituinal and Latitudinal Gradients'. It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date: June 2002
Creator: Coastal Fisheries Institute, Louisiana State University
Partner: UNT Libraries Government Documents Department

Genetically Engineered Salmon

Description: This report discusses the genetically modified salmon. The term “genetic modification” refers to changes in an organism’s genetic makeup that do not occur in nature. Also, if approved by the Food and Drug Administration (FDA), Atlantic salmon would be the first genetically engineered (GE) animal to be marketed in the United States for human consumption.
Date: April 30, 2014
Creator: Upton, Harold F. & Cowan, Tadlock
Partner: UNT Libraries Government Documents Department

State of Idaho Augmented Anadromous Fish Health Monitoring, 1987 Annual Report.

Description: The anadromous fish health monitoring program began in full operation in January 1988 after the hiring of the lead pathologist. This short operating period limits the amount of information available at the time of this writing. Pre-release sampling of smolts revealed the presence of several sub-clinical pathogens. Organosomatic analysis results demonstrated no major abnormalities in the examined stocks. The results of the 1988 steelhead broodstock sampling are still pending.
Date: May 1, 1988
Creator: Foott, J. Scott & Hauck, A. Kent
Partner: UNT Libraries Government Documents Department

State of Idaho Augmented Anadromous Fish Health Monitoring, 1988 Annual Report.

Description: This report documents the progress in the assigned tasks which have occurred during the second year of the Augmented Anadromous Fish Health Monitoring Project. Fish at seven Idaho Department of Fish and Game facilities were monitored for various pathogens and organosomatic analyses were performed on smolts prior to their release in the Spring of 1989. A disease database has been developed and facility impediments to fish health have been identified.
Date: May 1, 1989
Creator: Foott, J. Scott & Hauch, A. Kent
Partner: UNT Libraries Government Documents Department

Life History Allocation of Energy to Growth and Reproduction in Gizzard Shad, Dorosoma cepedianum, in North Central Texas

Description: Life history allocation of energy to growth and reproduction was determined for female gizzard shad. Absolute caloric energy allocated to eggs increased with age. The relative amount of production energy directed to reproduction increased with age up to 5 years and then decreased. Seasonal variation in lipids was studied. Quantitative changes occurred in ovarian lipids during the reproductive cycle. Carcass lipids varied seasonally. Age of sexual maturity was 3 years. Delayed maturity is attributed to high allocation of energy to growth enabling shad to outgrow intense competition and predation in pre-reproductive ages; there is little competition and predation in reproductive shad. Growth rates and condition factors indicated constant availability of food seasonally.
Date: December 1976
Creator: Fagan, Joseph A.
Partner: UNT Libraries

Responses of Selected Texas Fishes to Abiotic Factors, and an Evaluation of the Mechanisms Controlling Thermal Tolerance of the Sheepshead Minnow

Description: Low oxygen tolerances of ten fishes were estimated using an original nitrogen cascade design, and reciprocally transformed to express responses as ventilated volume necessary to satisfy minimal oxygen demand (L·mg O2^-1). Values ranged from 0.52 to 5.64 L·mg^-1 and were partitioned into three statistically distinct groups. Eight stream fishes showed moderately high tolerances reflecting metabolic adaptations associated with stream intermittency. Juvenile longear sunfish and two mollies comprised the second group. High tolerance of hypoxia may allow juvenile sunfish to avoid predation, and mollies to survive harsh environmental oxygen regimens. The sheepshead minnow was the most tolerant species of low oxygen, of those examined, explaining its presence in severely hypoxic environments.
Date: May 1994
Creator: Bennett, Wayne A. (Wayne Arden)
Partner: UNT Libraries

Evaluation of the Technical, Economic and Practical Feasibility of Radiation Preservation of Fish

Description: From abstract: Based on exploratory studies conducted over the last six years on the radiation-preservation of various marine species, it is apparent that low dose substerilization-radiation treatment of certain selected sea foods can provide advantages for the procurer, processor, distributor and consumer of edible marine products.
Date: 1960?
Creator: Proctor, Bernard E.; Goldblith, Samuel A.; Nickerson, John T. & Farkas, D. F.
Partner: UNT Libraries Government Documents Department

Fish and Shellfish Preferences of Household Consumers

Description: "This report is an analysis of a nationwide survey in October 1951 of household consumers' preferences for fresh and frozen fish and shellfish. The survey was conducted under the auspices of the United States Fish and Wildlife Service to aid the Nation's fishing industry, which is composed predominantly of small firms that find it difficult to make adequate contacts with consumers" (p. 1).
Date: 1955
Creator: Stolting, Walter H.
Partner: UNT Libraries Government Documents Department

Endangered Species Act and Legal Issues Regarding Columbia Basin Salmon and Steelhead

Description: This report discusses the resident fish, such as bull trout and Kootenai River white sturgeon, which are listed as threatened and endangered respectively under the ESA are affected by the FCRPS. This report focuses on Endangered Species Act (ESA) actions and litigation related to these species.
Date: July 16, 2008
Creator: Lane, Nic; Alexander, Kristina & Buck, Eugene H.
Partner: UNT Libraries Government Documents Department

Effects of Deepwater Horizon Crude Oil on Visual Function in Teleost Fishes

Description: The Deepwater Horizon oil spill released millions of barrels of oil into the Gulf of Mexico, impacting economically and ecologically important fishes. Polycyclic aromatic hydrocarbons (PAHs) present in the oil have been shown to cause developmental impairments in early life stage fishes, such as morphological and behavioral changes related to eye formation and visual processing following PAH exposure. Prior research reported reduced eye growth in open water, pelagic species, as well as reduced photoreceptor-specific transcription factors associated with eye development following exposure to crude oil. Though changes in transcriptomic-level pathways associated with vision and visual processing have been reported, it has yet to be determined how these changes relate to physiological or behavioral-level effects in fish. Therefore, the present studies evaluated the effect of weathered crude oil on eye development and visual function in mahi-mahi, red drum, sheepshead minnow, and zebrafish larvae. Fish were assessed through several visually-mediated behavioral assays, analyzed histologically and immunohistologically, along with subsequent transcriptomic analyses and associated gene expression changes. Larvae exposed to crude oil experienced significantly reduced abilities to exhibit optomotor or optokinetic responses relative to controls, with associated reductions in retinal development. Furthermore, genes associated with eye development and phototransduction were downregulated, with subsequent decreases in the immunofluorescence of neurological connections within the retina and a choroid-specific increase in apoptotic activity. We related oil-induced transcriptomic-level effects to morphological, physiological, and behavioral-level impairments in larval teleost fishes.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: August 2018
Creator: Magnuson, Jason T
Partner: UNT Libraries

The Roles of Genic Behavioral and Biochemical Mechanisms in the Adaption of Minnows of the Genus Notropis (Cyprinidae) to Temperature

Description: Electrophoretic variation at twenty gene loci, patterns of behavioral thermoregulation, and genotype-specific malate dehydrogenase kinetics were investigated among populations of the red shiner, Notropis lutrensis, and the blacktail shiner, N. venustus, collected from thermally altered and thermally unaltered portions of their ranges. Genic variation was found to be high among red shiners and low among blacktail shiners. The behavioral response of the blacktail shiner to temperature was fixed among the populations sampled, whereas the response of the red shiner was mutable. Finally, blacktail shiners have incorporated into their genome an Mdh-B allele which functions well at low temperatures; red shiners, displaying high levels of Mdh-B polymorphism, maintain a more complex set of allozymes which function well over a wide range of environmental temperatures. These data are consistent with reported ecotypic distributions of the species in Texas waters; i.e., blacktail shiners occur in cool, thermally static habitats, and red shiners are tolerant of wide temperature ranges.
Date: December 1981
Creator: Calhoun, Stuart W. (Stuart Wayne)
Partner: UNT Libraries

The Influence of Stream Regulation on Genic Differentiation and Thermal Tolerance in the Red Shiner, Notropis Lutrensis

Description: Genetic variation and thermal tolerance were surveyed for variation attributed to nonuniform selection pressures for five populations of the red shiner, Notropis lutrensis, collected from regulated and unregulated portions of a Texas river. Populations within 30 km of a hypolimnion-release dam that experience large thermal perturbations were found to have higher levels of heterozygosity, higher levels of polymorphism, significantly depressed levels of upper thermal tolerance endpoints, and greater variances in tolerance endpoints. These populations have evolved enzyme systems differing from the unregulated populations in response to a variable and depressed thermal regime.
Date: December 1982
Creator: King, Timothy L. (Timothy Lee)
Partner: UNT Libraries