Aquaculture and Fisheries Commons^™

Metals And Organic Compounds In Fish And Sediments From The Missouri And Lower Kansas Rivers In Kansas In 1991, George T. Allen

United States Fish and Wildlife Service: Publications

I sampled sediments and common carp (Cyprinus carpio) at two locations on the Kansas River and two locations on the Missouri River adjacent to Kansas in June 1991. All samples were analyzed for metals, organochlorine compounds, and aliphatic and aromatic hydrocarbons. Sediments also were analyzed for aromatic hydrocarbons.

Concentrations of aluminum, cadmium, chromium, and lead in one or more of the sampling locations are of concern.

In the common carp composites, chlordane compound concentrations were above the level at which detrimental effects might be found at Kansas City and at Bonner Springs. However, there is probably little that can be …

Environmental Contaminant Surveys In Three National Wildlife Refuges In Wyoming, Pedro Ramirez Jr., Joni Armstrong

United States Fish and Wildlife Service: Publications

Environmental contaminants surveys were conducted at National Elk, Seedskadee, and Hut ton Lake National Wildlife Refuges (NWR) to provide information on existing conditions to identify potential habitat quality problems, and to determine if non-point sources of pollution may be affecting the refuges. Pondweed (Potamogeton spp.) samples from Hut ton, Rush, and Cre;ghton Lakes and Lake George at Hut ton Lake NWR and Hay Farm Pond at Seedskadee NWR had boron concentrations greater than 300 ug/g dry weight, the level suspected of causing reduced growth in mallard ducklings (Eisler 1990). The source of the boron is unknown. One pondweed sample …

Mercury In Fish Collected From The Indian Lake System Stillwater Wildlife Management Area Churchill County, Nevada, Peter Tuttle

United States Fish and Wildlife Service: Publications

Elevated mercury levels have been identified in water, sediments, and biota in the Carson River drainage basin, west-central, Nevada. In some instances mercury concentrations exceeded levels considered safe for fish, wildlife, and humans. Of particular concern were game fish in the lower Carson River basin which may be consumed by humans. Many of these fish have been found to contain more than 1.0 μg/g wet weight, the action level identified as safe for human consumption by the Food and Drug Administration (FDA 1984) and the Environmental Protection Agency (EPA 1989). Concern for human health promptedthe Nevada State Division of Health …

The Influence Of Selenium On Incubation Patterns And Nesting Success Of Waterbirds At Ouray National Wildlife Refuge, Utah, Bruce H. Waddell, Mark C. Stanger

United States Fish and Wildlife Service: Publications

Egg temperatures and hen attentiveness were studied from 1989-91 on nests near sites known to have high selenium concentrations in an effort to document causes for nesting failures. Temperature and light sensitive radio transmitters were used to monitor incubation patterns in American coots (Fulica americana), mallards (Anas platyrhynchos), gadwalls (Anas strepera), northern shovelers, (Anas clypeata), and redheads (Aythya americana) nests. Mean temperatures of telemetered eggs placed in incubated nests ranged from 32.6°C to 37.8°C and differed only slightly from results obtained in other studies. We found no nesting failures among …

Contaminants Survey Of The Proposed Marais Des Cygnes National Wildlife Refuge, George T. Allen, Tom Nash

United States Fish and Wildlife Service: Publications

We sampled sediments and fish at 16 locations at the proposed Marais des Cygnes National Wildlife Refuge in Kansas and Missouri.

All of the samples were analyzed for metals and organochlorine compounds. Selected sediment samples also were analyzed for aliphatic hydrocarbons.

There are no apparent serious contaminants concerns with the proposed acquisition, with the exception of two dump sites. The former municipal dump for Pleasanton, in section 26 of Township 21S, Range 25E in Kansas has not been cleaned up. Therefore, the land it is on should be excluded from acquisition. A former dump in section 6, Township 39N, Range …

Metal Concentrations In Blood From An Adult Bald Eagle Nesting At Clinton Reservoir In Kansas, George T. Allen

United States Fish and Wildlife Service: Publications

Concentrations of metals in blood from an adult male bald eagle nesting at Clinton Reservoir in eastern Kansas in 1991 were analyzed by induction coupled plasma emission spectroscopy without preconcentration.

Because there are very limited data on background levels of most metals in bald eagle blood, the data herein are provided for comparison with other samples at later dates.

Few metals were detected in the sample. The only metal detected that is not physiologically well controlled was mercury. However, the mercury concentration was low compared to concentrations found in blood from bald eagles in the western United States.

Trace Element Concentrations In Flue Gas Desulfurlzation Wastewater From The Jim Bridger Power Plant, Sweetwater County, Wyoming, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

The coal-fired Jim Bridger Power Plant near Rock springs, Wyoming uses soda liquor from nearby trona (soda ash) processing plants to neutralize the acidity of water used in their flue scrubbers. Analyses of this Flue Gas Desulfurization (FGD) liquor by Western Wyoming College Water Quality Laboratory shows high concentrations of sodium, chloride, sulfates, carbonates and bicarbonates. The U.S. Fish and Wildlife Service had samples of the FGD wastewater analyzed for sodium, chloride, sulfates, carbonates and bicarbonates as well as trace metals. Trace metals were not present in concentrations known to pose adverse impacts to wildlife. Sodium concentrations, however, were excessively …

Trace Elements In Water, Sediments And Biota From Wetlands In The Laramie Basin And Their Relationship To The Recovery Of The Endangered Wyoming Toad (Bufo Hemiophrys Baxteri, Pedro Ramirez Jr.

United States Fish and Wildlife Service: Publications

The U.S. Fish and Wildlife Service conducted a monitoring study in 1989,1990
and 1991 to determine if trace elements occur at levels that may affect the Wyoming toad (Bufo hemiophrys baxteri), a federally-listed endangered species. The study will provide information to help the Wyoming Toad Recovery Team to select reintroduction sites and in habitat acquisition efforts. Biologists collected water, sediment, aquatic invertebrates, algae and emergent insects from Mortenson Lake, historically occupied areas and proposed reintroduction sites. No major problems are apparent with trace elements in water, sediment and biota from sites providing existing or potential habitat for the …

Visual Feeding By Juvenile Bear Lake Sculpin, D. Neverman, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Young-of-the-year Bear Lake sculpin Cottus extensus feed throughout the day on benthic invertebrates and cease feeding at night when they migrate to the metalimnion. We investigated their reliance on vision by conducting feeding trials at different light levels in the laboratory. Feeding rate reached a maximum at intermediate light levels (near 10^16 photons sm^–2 ss^–1; approximately 1 lux) but decreased as light intensity increased beyond this range. At this maximum rate, the fish fed nine times faster than they were able to feed in the dark, showing that young Bear Lake sculpin rely heavily upon vision to feed. The light …

A Trophic Gradient Analysis Of Lake Powell During Spring Runnoff 1992, Wayne A. Wurtsbaugh, Clyde Lay, Darren Carlise, Corey Huxol, Craig Schaugaard, Beau Clements, David Beauchamp

Watershed Sciences Faculty Publications

Between 26 April and 2 May 1992, students in a utah state university aquatic ecology class visited Lake Powell to do a study of trophic gradients of the reservoir. The main axis of the reservoir was surveyed, as well as less detailed analyses of Moki and Escalante Canyons. The work was conducted in collaboration with personnel from the u.s. Bureau of Reclamation headed by Bill Vernieu, and from the u.s. Geological Survey (Dick Marzolf). Some of their data appear in the physical-chemical section of this report.

Each student was responsible for compiling a report on one of the following specific …

Snake River Sockeye Salmon (Oncorhynchus Nerka) Habitat/Limnologic Research, Scott Spaulding, Wayne A. Wurtsbaugh, Shoshone-Bannock Tribe

Watershed Sciences Faculty Publications

This report outlines long-term planning and monitoring activities that occurred in 1991 and 1992 in the Stanley Basin Lakes of the upper Salmon River, Idaho for the purpose of sockeye salmon (Oncorhynchus nerka) recovery. Limnological monitoring and experimental sampling protocol, designed to establish a limnological baseline and to evaluate sockeye salmon production capability of the lakes, are present:ed. Also presented are recommended passage improvements for current fish passage barriers/impediments on migratory routes to the lakes. We initiated O. Nerka population evaluations for Redfish and Alturas lakes; this included population estimates of emerging kokanee fry entering each lake in the spring …

Lake Trout Spawning In Lake Tahoe: Egg Incubation In Deepwater Macrophyte Beds, D. A. Beauchamp, B. C. Allen, R. C. Richards, Wayne A. Wurtsbaugh, C. R. Goldman

Watershed Sciences Faculty Publications

Although most populations of lake trout Salvelinus namaycush spawn over rocky shoals, use of these substrates by lake trout has not yet been found in Lake Tahoe. Large cobble substrate exists at depths less than 20 m, and steep, fractured, rocky substrate can be found in isolated areas from the surface down to at least 100 m, but no evidence of spawning activity in these areas has been found. Instead, at least a portion of the population spawns on deepwater mounds (40–60 m deep) over beds of the macrophyte Chara delicatula. This is the first known report of lake trout …

Size-Specific Growth Of Illinois Stream Fishes: Relationships With Biotic And Abiotic Habitat Variables, John H. Putman Ii

Masters Theses

Growth is an important component in the ecology and management of stream fisheries. Growth of stream fish has received relatively little attention and relationships with habitat variables are largely unknown. We quantified growth of juvenile and adult size classes of bluegill (Lepomis macrochirus), common carp (Cyprinus carpio), channel catfish (Ictalurus punctatus), largemouth bass (Micropterus salmoides), rock bass (Ambloplites rupestris), and smallmouth bass (M. dolomieui) from Illinois streams. Growth rates for each species fell within ranges previously reported for lakes and rivers in the United States although they averaged slightly lower. Within each species except channel catfish, growth …

Population Status And Characteristics Of Macrhybopsis Gelida, Platygobio Gracilis And Rhinichthys Cataractae In The Missouri River Basin, Selena J. Werdon

Electronic Theses and Dissertations

Few sturgeon chub (Macrhybopsis gelida: Cyprinidae) have been collected in the last decade, therefore their status, habitat selection and morphology were investigated at 172 previous collection sites. Data on two ecologically similar species, Platygobio gracilis and Rhinichthys cataractae, were also collected. Macrhvbopsis gelida were collected at 28 sites on the Powder River (n = 158) in Wyoming and Montana, and at one site on the Yellowstone River (n = 1) in Montana. Age-I, Age-II and Age-III M. gelida were collected. Specimens were 37 to 95 mm in total length. Macrhvbopsis gelida were ripe in mid-June, at water temperatures of 18.3-22. …

Environmental Contaminants Monitoring In Selected Wetlands Of Wyoming [Biologically Active Elements Study], Pedro Ramirez Jr., Joni Armstrong

United States Fish and Wildlife Service: Publications

Sediment, water and biota were collected from selected wetlands in Wyoming for the Biologically Active Elements (BAE) Study in 1988, 1989 and 1990 to identify contaminant problems that may warrant further study. This report also will assist in developing a comprehensive contaminants monitoring program for the state and will provide baseline contaminants data for wetland areas. Sites surveyed included areas affected by historical and current mining; wetlands receiving oilfield or oil refinery discharges; wetlands receiving irrigation return flows; stock ponds and natural depressions in areas with seleniferous soils and wetlands influenced by urban runoff. Monitoring is recommended for wetlands receiving …

A Study Of The Summer Steelhead, Oncorhynchus Mykiss In Several Intermittent Tributaries Of The Satus Creek Basin, Washington, Joel Denney Hubble

All Master's Theses

The summer steelhead, Oncorhynchus mykiss population was studied in three intermittent tributaries in the Satus Creek Basin. There was a strong tendency for post emergent fry, resulting from redds located in intermittent reaches to move downstream. However, survival to perennial flow conditions was very low. Steelhead production in Dry Creek appears to be lower than in Logy Creek, because of elevated water temperatures and minimal spring and summer stream flow.

Field Evaluation Of Tilapia Zilli (Gervais) As A Biological Control Agent For Mosquito Control, E. J. Asimeng, M. J. Mutinga

All Peer-Reviewed Publications

Tilapia zilli (Gervais), a larvivorous fish identified in the Mwea Rice Irrigation System (Kenya), was evaluated in the field to assess its potential for biological control of mosquito larvae. The study was conducted from October 1991 to April 1992 in experimental ponds constructed at Mbui-Njeru, which is one of the 36 villages in the irrigation scheme. T. zilli was found to be extremely effective in controlling mosquito breeding that persisted throughout the study period. However, the presence of vegetation and turbidity significantly reduced its efficiency in predation. The negative effects of vegetation could be averted by combining T. zilli with …

River Channel Stability And The Implications For Fish Habitat, John T. Beebe

Theses and Dissertations (Comprehensive)

The purpose of this project was to investigate various aspects of river channel stability as they relate to fish habitat. Two headwater creeks of the Credit River system, Black and Silver Creeks, and their confluent stream, the West Credit River in Southern Ontario were used in the study. Thirty-five cross-sections were established and revisited during four flow regimes, summer base flow, fall secondary peak flow, spring melt-high flow and post-spring high flow. Measurements of width, depth and temperature were taken at these times. Water samples were taken for determination of suspended sediment concentration. Channel stability was investigated in relation to …

Investigations Of Forage Fish And Lake Trout Salvelinus Namaycush Interactions In Flaming Gorge Reservoir, Wyoming-Utah, Daniel L. Yule

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

I investigated the interaction of lake trout (Salvelinus namaycush) and their dominant forage fish populations, Utah chub (Gila atraria) and kokanee salmon (Oncorhynchus nerka), in Flaming Gorge Reservoir, Wyoming-Utah. Through bioenergetics modeling, I quantified the consumption dynamics of the lake trout population. From hydroacoustics analyses, I quantified the density and biomass of the two dominant forage fish populations.

In Chapter II, I report the results of the energetics analysis. The objective of this chapter was to understand the role of lake trout predation in recent changes in fish assemblage structure of the reservoir. Through …

Management Plan Kimberley Prawn Fishery., G. Stewart

Fisheries Management Papers

The report outlines a management plan for the Kimberley Prawn Fishery which operates in Western Australia coastal waters of the Indian Ocean and Timor Sea off the Kimberley coastline lying east of Koolan Island, 123 degrees 45' east longitude and the west of Cape Londonderry, 126 degrees 58' east longitude. This management plan proposes a set of options to be offered to the Northern Prawn Fishery Class B and Class C unit holders, with Western Australian Fishing Boat Licences, who are displaced by the compulsory reduction of the Northern Prawn Fishery fleet and to owners of trawlers with access to …

State Of The Fisheries Report 1991, Fisheries Department Of Western Australia

Status Reports of the Fisheries and Aquatic Resources

The State of the Fisheries is published annually by the Fisheries Department as part of the statutory reporting process required under the Fisheries Act. This report covers developments and production in the State's fisheries up to the end of December 1991. Full details of the department's operations for this period are published separately in the department's annual reports for the financial years ending June 1991 and 1992. Figures provided in the tables are derived from catch returns completed by fishermen which are processed by the Australian Bureau of Statistics up to June 1991. Other information provided in the text comes …

A Laboratory Study Of Predation On The Trinidadian Guppy, Poecilia Reticulata, By Two Natural Piscine Predators: Effects Of Predator Size, Prey Size, And Habitat Complexity, Hayden Thomas Mattingly

Biological Sciences Theses & Dissertations

Test populations of different-sized guppies, Poecilia reticulata, were exposed to individuals of two natural predatory species, the pike cichlid Crenicichla a/ta and the killifish Rivulus harti, under conditions of varying prey (guppy) density and habitat complexity in the laboratory. Rivulus fed most frequently on newborn and juvenile guppies < 14 mm. Crenicichla consumed more and larger guppies than did Rivulus. The mean guppy size eaten by Crenicichla was dependent on the length of the individual predator, but as a group, the 15 Crenicichla tested were non-selective with respect to guppy size and gender. The prey gender preference of Rivulus could not he determined …

Department Of Fisheries Annual Report 1990/91, Department Of Fisheries, Western Australia

Department of Fisheries Annual Reports

No abstract provided.

Computer Simulation Techniques To Assess Bias And Precision In The Roving Creel Survey Estimator, David L. Wade

Biological Sciences Theses & Dissertations

Fisheries scientists use roving creel survey methods to estimate total catch and total effort of recreational fisheries. Bias in the roving creel estimators had been known to the scientific community, but it had not been quantified. I developed a roving-creel-survey computer simulation model to investigate the bias and precision of roving creel estimators, and estimated parameters for the model based on field observations from the blue crab (Callinectes sapidus) fishery of the Chesapeake Bay. The computer model was used to identify bias in roving-creel effort and catch estimators and to demonstrate survey methods that will reduce this bias. …

A Study Into The Feasibility Of Establishing A System For The Buy-Back Of Salmon Fishing Authorisations And Related Endorsements., P. J. Monaghan

Fisheries Management Papers

A buy-back system for the buy-back of under performing salmon authorisations is suggested as the most cost effective method of reducing the number of salmon fishing units. It could be of benefit to commercial salmon fishermen and could be achieved at relatively modest cost. The alternative of implementing a buy-back system of interest to all salmon authorisation holders could be extraordinary expensive as salmon fishermen place a high value on lifestyle.

A Discussion Of Options For Effort Reduction., Southern Demersal Gillnet And Demersal Longline Fishery Management Advisory Committe

Fisheries Management Papers

The committee prefers to reduce effort in the fishery by improving the effectiveness of the 50 per cent reduction on transfer rule. To do this it is necessary to prevent the use of lease arrangements which act as a form of transfer.Some consideration could also be given to encouraging transfer of licences by protecting purchased units against further effort reductions. The Minister for Fisheries has determined that ownership statement must be completed prior to licence renewal each year. It is hoped that this will prevent licence holders from using lease arrangements to effect transfers and so avoid the loss of …

Age Growth And Reproduction Of Black Drum, Pogonias Cromis, In Virginia, Stephen J. Bobko

Biological Sciences Theses & Dissertations

The black drum, Pogonias cromis, is of great economic importance to the communities of the lower Eastern Shore of Virginia. Fish are sought both commercially and recreationally during their yearly spring spawning run. Although the number of fish caught each year does not rival other exploited species, it is a directed fishery that partially supports many local fishermen, seafood distributors, marinas, motel owners, and restauranteurs.

Black drum were collected during the fall of 1989 and the spring of 1990 to investigate the population dynamics of fish found in Virginia's Chesapeake Bay and surrounding coastal waters. A total of 235 fish …

Establishment Of A Registry To Record Charges Against Fishing Licences When Used As Security For Loans., P. Rogers

Fisheries Management Papers

This report outlines the Committee's final advice to the Minister for Fisheries on the need for a public commercial fishing licence register which has a mechanism for the recording of financial security interest in fishing licences. The Committee was greatly assisted by legislation introduced within the Victorian State Parliament during 1989, which by amendment to the Fisheries Act, provides for the registration of prescribed financial interests in fishing licences (See Appendix 1).

The Future For Recreational Fishing Final Report Of The Recreational Fishing Advisory Committee, Recreational Fishing Advisory Committee

Fisheries Management Papers

This report discusses: What Recreational fishing means to Western Australia's estimated 300,000 fishers. Conservation and equality in catch sharing was at the heart of the Committee's investigations into developing strategies for the future management of important recreational fish stocks.

Appendix To The Final Report Of The Rfac. Statistical Summary Of Public Responses To Key Issues., Recreational Fishing Advisory Committee Western Australia.

Fisheries Management Papers

This paper has been published as a separate appendix to the final report of the Recreational Fishing Advisory Committee, and should be read in conjunction with it, and the Committee's discussion paper ("Final report of the Recreational Fishing Advisory Committee - Fisheries Management Paper No. 41 1991). The key issues that were identified in the discussion paper came up under the following headings: 5.1 Environment 5.2 Resource Sharing 5.3 Access for Fishing 5.4 Research 5.5 Management rules 5.6 Enforcement 5.7 Charter fishing 5.8 Funding and licensing 5.9 Community consultation 5.10 Public awareness and community education.