Toxicity of municipal wastewater effluents contaminated by pentachlorophenol in southwest Missouri
G.D. Wylie, S.E. Finger, R.W. Crawford
1990, Environmental Pollution (64) 43-53
Toxicity of effluents from two sewage treatment plants in Joplin, Missouri, was tested using Ceriodaphnia dubia and Pimephales promelas. No test organisms survived in effluents from either plant, in effluents diluted with water from Turkey Creek (the receiving stream), or in water from Turkey Creek. Mortality was complete in all but the most...
Mercury accumulation in yellow perch in Wisconsin seepage lakes: Relation to lake characteristics
W.G. Cope, J.G. Wiener, R.G. Rada
1990, Environmental Toxicology and Chemistry (9) 931-940
We studied relations between lacustrine characteristics and the total mercury (Hg) content of calendar age-2 yellow perch (Perca flavescens) in 10 seepage lakes in north-central Wisconsin. Mean concentrations and burdens (masses) of Hg in whole perch varied widely among lakes, were negatively correlated with lake pH and were positively correlated...
Mortality from duck plague virus in immunosuppressed adult mallard ducks
Diana R. Goldberg, Thomas M. Yuill, E.C. Burgess
1990, Journal of Wildlife Diseases (26) 299-306
Environmental contaminants contain chemicals that, if ingested, could affect the immunological status of wild birds, and in particular, their resistance to infectious disease. Immunosuppression caused by environmental contaminants, could have a major impact on waterfowl populations, resulting in increased susceptibility to contagious disease agents. Duck plague virus has caused repeated...
Computer-aided procedure for counting waterfowl on aerial photographs
D. Bajzak, John F. Piatt
1990, Wildlife Society Bulletin (18) 125-129
Examination of 46 Canada goose goslings yielded 14 species of parasites, including five Protozoa, four Nematoda, two Cestoda, and three Trematoda. Evidence indicates that goslings acquired most of these infections during their first week of life. Some parasites, Prosthogonimus sp., occurred only in younger birds. Others, Leucocytozoon simondi, were...
Effect of pH on the accumulation kinetics of pentachlorophenol in goldfish
G. R. Stehly, W. L. Hayton
1990, Archives of Environmental Contamination and Toxicology (19) 464-470
The kinetics of accumulation of pentachlorophenol (PCP) at various pH values were investigated to explore how pH-dependent accumulation might influence PCP toxicity. Goldfish (Carassius auratus) were exposed to 5 μg PCP/L in a static system buffered with 7.5 mM bicine orN,N-bis(2-hydroxyethyl)-2-aminoethane sulfonic acid (BES) at pH 7.0, 8.0, or 9.0....
Mechanisms controlling Cu, Fe, Mn, and Co profiles in peat of the Filson Creek Fen, northeastern Minnesota
K. Walton-Day, L.H. Filipek, C. S.E. Papp
1990, Geochimica et Cosmochimica Acta (54) 2933-2946
Filson Creek Fen, located in northeastern Minnesota, overlies a Cu-Ni sulfide deposit. A site in the fen was studied to evaluate the hydrogeochemical mechanisms governing the development of Fe, Mn, Co, and Cu profiles in the peat. At the study site, surface peat approximately 1 m thick is separated from...
Pintails: causes for the decline
M. R. Miller
1990, California Waterfowl Association Magazine (16) 41-44
No abstract available at this time...
Egg size and laying order of snowy egrets, great egrets, and black-crowned night-herons
T. W. Custer, P. C. Frederick
1990, Condor (92) 772-775
The authors' objective was to describe egg size in relation to laying order for Great Egrets (Casmerodius albus ), Snowy Egrets (Egretta thula ), and Black-crowned Night-Herons (Nycticorax nycticorax ) in a southern Texas colony and Great Egrets in a southern Florida colony. Based on egg-size patterns in...
Measurements of the abilities of cultured fishes to moisturize their digesta
S. G. Hughes, R. Barrows
1990, Comparative Biochemistry and Physiology, Part A: Physiology (96) 109-111
1. Four salmonid and four cool-water fish species were tested to determine their ability to moisturize their digesta.2. After the fish were fed, they were sacrificed, the gut contents were removed and water content was determined.3. The digesta of the salmonids contained the least water (63–72%) and those of largemouth...
Observations on the effects of irrigation water containing 3-trifluoromethyl-4-nitrophenol (TFM) on plants
P.A. Gilderhus
1990, Investigations in Fish Control 100
Abstract not submitted to date...
Vertical distribution of adult American shad in the Connecticut River
David B. Witherell, Boyd Kynard
1990, Transactions of the American Fisheries Society (119) 151-155
Adult American shad Alosa sapidissima were sampled with vertical gill nets during the 1986 and 1987 spawning and postspawning migrations in the Connecticut River. Most (83%) were caught in the lower half of the water column, but not on the river bottom. The vertical distributions of gravid and spent fish were similar...
Removal of benzocaine from water by filtration with activated carbon
G.E. Howe, T.D. Bills, L. L. Marking
1990, Progressive Fish-Culturist (52) 32-35
Benzocaine is a promising candidate for registration with the U.S. Food and Drug Administration for use as an anesthetic in fish culture, management, and research. A method for the removal of benzocaine from hatchery effluents could speed registration of this drug by eliminating requirements for data on its residues, tolerances,...
Recovery of an offshore lake trout (Salvelinus namaycush) population in eastern Lake Superior
Gary L. Curtis
1990, Journal of Great Lakes Research (16) 279-287
The lake trout (Salvelinus namaycush) population at Stannard Rock, Michigan, an isolated offshore reef in eastern Lake Superior, was monitored each spring from 1959–79 using a permit assessment gill net fishery. This population, like nearly all of those in inshore waters, declined to low levels during the years of intense...
Decline of wildcelery buds in the lower Detroit River, 1950-85
Donald W. Schloesser, Bruce A. Manny
1990, Journal of Wildlife Management (54) 72-76
American wildcelery buds (Vallisneria americana), an abundant food eaten by diving ducks (Aythini) during migrations, decreased in the lower Detroit River of the Great Lakes from 1950 to 1985. Bud densities decreased at 2 (-14 and -18 buds/mA?) of 5 locations and were similar at 3 (-2, +2, and +3...
Benthic invertebrate bioassays with toxic sediment and pore water
John P. Giesy, Cornell J. Rosiu, Robert L. Graney, Mary G. Henry
1990, Environmental Toxicology and Chemistry (9) 233-248
The relative sensitivities of bioassays to determine the toxicity of sediments were investigated and three methods of making the sample dilutions required to generate dose-response relationships were compared. The assays studied were: (a) Microtox®, a 15-min assay ofPhotobacterium phosphoreum bioluminescence inhibition by pore water; (b) 48-h Daphnia magnalethality test in pore water;...
Gas transfer within a multi-stage packed column oxygen absorber: Model development and application
Barnaby J. Watten, Claude E. Boyd
1990, Aquacultural Engineering (9) 33-59
A packed column oxygen obsorber was developed in which oxygen flow is directed, in serial reuse, through parallel packed column stages receiving equal portions of the liquid being treated. The relative performance of the absorber was established using a computer simulation program employing finite difference-mass transfer calculations. The program was...
Toxicokinetics of PAHs in Hexagenia
Guy R. Stehly, Peter F. Landrum, Mary G. Henry, C. Klemm
1990, Environmental Toxicology and Chemistry (9) 167-174
The accumulation kinetics of two waterborne polycyclic aromatic hydrocarbons (PAHs), benzo[a]pyrene (BAP) and phenanthrene (PHE), were studied in the mayfly nymph (Hexagenia limbata). The uptake clearance decreased while the bioconcentration of BAP increased with an increase in weight of the H. limbata nymph. The relationship between uptake clearance and bioconcentration for PHE was...
Modeling the effects of serial off-gas reuse on the performance of a hooded surface oxygen obsorption system
Barnaby J. Watten, J. W. Meade, Claude E. Boyd
1990, Aquacultural Engineering (9) 97-120
A numerical model was used to evaluate the performance of a surface agitation system designed to contact commercial oxygen with water. The modeled system was unique in that oxygen-rich off-gas, normally discharged to the atmosphere, was directed in serial reuse through additional contact stages receiving untreated water. A correlation between...
Effects of ozonated-water reuse on salinity tolerance of Atlantic salmon
H. A. Poston, R.C. Williams
1990, Progressive Fish-Culturist (52) 36-40
We conducted several seasonal aquarium experiments to determine survival and body chemistry changes of Atlantic salmon (Salmo salar) after 24‐h exposures to salinities of 0, 16.5, 33, and 40‰ at 10°C. Fish transferred directly to test aquaria from an ozonated, 100‰ closed water‐reuse system at 18°C were compared with fish...
Enhanced bioaccumulation of mercury, cadmium and lead in low-alkalinity waters: An emerging regional environmental problem
J.G. Wiener, P.M. Stokes
1990, Environmental Toxicology and Chemistry (9) 821-823
During the past decade or so, observations of high mercury concentrations in fish have renewed concerns and mercury, primarily in two groups of fresh waters: low-alkalinity lakes (the topic of this editorial) and newly created impoundments. The recent focus on the chemistry and biota of low-alkalinity (< 50...
Sago pondweed (Potamogeton pectinatus L.): A literature review
Harold A. Kantrud
1990, Resource Publication 176
Sago pondweed (Potamogeton pectinatus L.) is a submersed macrophyte of nearly cosmopolitan distribution. The plant is of worldwide importance as a waterfowl food but also can be a nuisance in irrigation canals and recreational areas. The plant reproduces by many different means, depending on habitat and environmental stress. Several genetic...
Growth and equilibrium in sea otter populations
J. A. Estes
1990, Journal of Animal Ecology (59) 385-400
(1) Counts through time were compiled for five sea otter (Enhydra lutris) populations in the north-east Pacific Ocean that were below equilibrium density: Attu Island, south-east Alaska, British Columbia, Washington State, and central California. Similar data were obtained from the equilibrium density population at Amchitka Island in 1971 and 1986....
Producing ducks using wire and electricity
J. T. Lokemoen
1990, South Carolina Waterfowl and Wetlands (4) 8-9
Abstract has not been submitted...
Effect of feeding rate and gas supersaturation on survival and growth of lake trout
W. F. Krise, J. W. Meade, R. A. Smith
1990, Progressive Fish-Culturist (52) 45-50
Fingerling lake trout (Salvelinus namaycush) were reared for 35 d in water with total dissolved gas pressures of 46, 78, 108, or 159 mm Hg above ambient conditions (▵P). Within each gas pressure treatment, daily feeding rations were (1) 1.7% of the total weight offish in the heaviest of three...
Changes in Wisconsin's Lake Michigan salmonid sport fishery, 1969-1985
Michael J. Hansen, Paul T. Schultz, Becky A. Lasee
1990, North American Journal of Fisheries Management (10) 442-457
The modern sport fishery for salmonids in Wisconsin waters of Lake Michigan was begun during 1963-1969 with the stocking of rainbow trout (Oncorhynchus mykiss), lake trout (Salvelinus namaycush), brook trout (S. fontinalis), brown trout (Salmo trutta), coho salmon (O. kisutch), and chinook salmon (O. tshawytscha). The fishery grew rapidly...
