Microcontaminants and reproductive impairment of the Forster's tern on Green Bay, Lake Michigan,1983
T.J. Kubiak, H.J. Harris, L.M. Smith, T.R. Schwartz, D.L. Stalling, J.A. Trick, L. Sileo, D. E. Docherty, T.C. Erdman
1989, Archives of Environmental Contamination and Toxicology (18) 706-727
For the 1983 nesting season, Forster's tern (Sterna forsteri) reproductive success was significantly impaired on organochlorine contaminated Green Bay, Lake Michigan compared to a relatively uncontaminated inland location at Lake Poygan, Wisconsin. Compared with tern eggs from Lake Poygan, eggs from Green Bay had significantly higher median concentrations...
Suppression of antibody-producing cells in rainbow trout spleen sections exposed to copper in vitro
D. P. Anderson, O. W. Dixon, J.E. Bodammer, E. F. Lizzio
1989, Journal of Aquatic Animal Health (1) 57-61
Immunosuppression was demonstrated in sections of rainbow trout Oncorhynchus mykiss (formerly Salmo gairdneri) spleens immunized in vitro and exposed in culture to different concentrations of copper chloride. The sections were immunized with dinitrophenyl-Ficoll and cultured in Eagle's minimum essential medium with 2% fetal calf serum; half of the medium...
Avulsion of the brachial plexus in a great horned owl (Bubo virginaus)
M.P. Moore, E. Stauber, N. J. Thomas
1989, Journal of Raptor Research (23) 3-9
Avulsion of the brachial plexus was documented in a Great Horned Owl (Bubo virginianus). A fractured scapula was also present. Cause of these injuries was not known but was thought to be due to trauma. Differentiation of musculoskeletal injury from peripheral nerve damage can be difficult in raptors. Use of...
Organochlorine contaminants in white-faced ibis eggs in southern Texas
T. W. Custer, C. A. Mitchell
1989, Colonial Waterbirds (12) 126-129
White-faced Ibis (Plegadis chihi) eggs collected from two colonies in southern Texas in 1985 had low mean concentrations of DDE (0.14-0.27 ppm wet weight). DDD, the only other organochlorine contaminant detected, was found in only 1 of 20 eggs. DDE concentrations in eggs were not significantly correlated with eggshell thickness....
Seasonal reproductive development of Lampsilis cardium, Amblema plicata plicata, and Potamilus alatus
L. E. Holland Bartels, T. W. Kammer
1989, Journal of Freshwater Ecology (5) 87-92
Adult specimens of three species of freshwater mussels common to the upper Mississippi River were examined histologically to determine seasonal patterns of development in gametogenesis and release of glochidia. Full maturation of gonadal materials in Lampsilis cardium (formerly L. ovata ventricosa), a long-term breeder, occurred when ambient river temperatures...
Recruitment failure in American avocets and black-necked stilts nesting at Kesterson Reservoir, California, 1984-1985
M.L. Williams, R. L. Hothem, H. M. Ohlendorf
1989, Condor (91) 797-802
We evaluated recruitment by American Avocets (Recurvirostra americana) and Black-necked Stilts (Himantopus mexicanus) in 1984 and 1985 at the selenium-contaminated Kesterson Reservoir and at a nearby reference site, the Volta Wildlife Area, both in western Merced County, California. Nests were monitored to determine their outcomes, including hatching success, and...
Twenty-four hour behavior patterns and budgets of free-ranging reindeer in winter
W. B. Collins, T. S. Smith
1989, Rangifer (9) 2-8
To obtain movement data on wild fulvous tree ducks (Dendrocygna bicolor) 165 immature pen-reared fulvous tree ducks were color-marked and released in three southeast Texas counties in July October 1969/70. Nine (5 percent) of the marked birds were recovered from 3 days to 9 months after release, and an...
Sightability adjustment methods for aerial surveys of wildlife populations
R.K. Steinhorst, M.D. Samuel
1989, Biometrics (45) 415-425
Aerial surveys are routinely conducted to estimate the abundance of wildlife species and the rate of population change. However, sightability of animal groups is acknowledged as a significant source of bias in these estimates. Recent research has focused on the development of sightability models to predict the probability of sighting...
Tolerance of lake trout, Salvelinus namaycush (Walbaum), sac fry to dissolved gas supersaturation
W. F. Krise, R. L. Herman
1989, Journal of Fish Diseases (12) 269-273
The tolerance of sac fry of lake trout, Salvelinus namaycush (Walbaum), to the acute effects of gas supersaturation, from hatching to swim-up, was tested using six gas levels, ranging from ΔP 8 to 148. Although many fish were moribund by the time the yolk was nearly absorbed,...
Fusarium mycotoxins from peanuts suspected as a cause of sandhill crane mortality
Ronald M. Windingstad, Richard J. Cole, Paul E. Nelson, Thomas J. Roffe, Ronnie R. George, Joe W. Dorner
1989, Journal of Wildlife Diseases (25) 38-46
An estimated 9,500 sandhill cranes (Grus canadensis) died in Gaines County, Texas and Roosevelt County, New Mexico between 1982 and 1987. The predominant clinical sign observed in sick cranes was their inability to hold their heads erect, both while standing and flying. Multiple muscle hemorrhages and submandibular edema were the...
Dispersal in the communally breeding groove-billed ani (Crotophaga sulcirostris)
B. S. Bowen, Rolf R. Koford, S.L. Vehrencamp
1989, Condor (91) 52-64
We studied dispersal in a color-banded population of the Groove-billed Ani (Crotophaga sulcirostris) in Costa Rica. Eight percent of the young alive at the end of the breeding season bred on their natal territories the next year and 4% remained but did not breed. Thirteen percent dispersed successfully within the...
Salmonid whirling disease: Myxosporean and actinosporean stages cross-react in direct fluorescent antibody test
M.E. Markiw
1989, Journal of Fish Diseases (12) 137-141
Serologic relatedness of the two life stages of the salmonid whirling disease parasite Myxosoma cerebralis Hofer, 1903 — myxosporean spores from fish cartilage and actinosporean triactinomyxon spores from aquatic tubificids — were investigated. When the direct fluorescent antibody technique was used, anti-triactinomyxon and anti-M. cerebralis rabbit sera conjugated...
Gas phase axial dispersion in a packed column oxygen absorber
Barnaby J. Watten, Claude E. Boyd
1989, Aquacultural Engineering (8) 421-434
Gas phase axial dispersion was characterized within an enclosed packed column receiving oxygen and water under counter-current flow conditions. Steady-state gas phase profiles (longitudinal) were measured during a series of 90 column runs in which, at each of three bed depths (0·362, 0·699, and 1·041 m), all combinations of the...
Comparison of pond-culture characteristics between Atlantic and Gulf Coast red drum fingerlings
L.S. Procarione, A. Henderson-Arzapalo, A. Maciorowski
1989, Progressive Fish-Culturist (51) 201-206
Fry of red drum (Sciaenops ocellatus) from Gulf of Mexico and Atlantic coast brood stocks were cultured in fertilized saltwater ponds during spring and fall 1987 to compare production and growth characteristics. Ponds were fertilized with a combination of cottonseed meal, phosphoric acid, and urea. Fry were stocked at an...
Developments in the control of bacterial kidney disease of salmonid fishes
D.G. Elliott, R.J. Pascho, G. L. Bullock
1989, Diseases of Aquatic Organisms (6) 201-215
Bacterial kidney disease of salmonid fishes, caused by Renibactenum salrnoninarum, was first reported more than 50 yr ago; nevertheless, large gaps persist in our knowledge of the infection - particularly in methods for its control. In the 1950's, principal control measures consisted of prophylactic or therapeutic feeding of sulfonamides, which...
Detection of infectious hematopoietic necrosis virus in cell culture fluid using immunoblot assay and biotinylated nonclonal antibody
C. L. Schultz, P. E. McAllister, W. B. Schill, B. C. Lidgerding, F. M. Hetrick
1989, Diseases of Aquatic Organisms (7) 31-37
No abstract available....
A macrophyte submodel for aquatic ecosystems
Carol Desormeau Collins, Joseph H. Wlosinski
1989, Aquatic Botany (33) 191-206
A macrophyte submodel has been incorporated and tested in CE-QUAL-R1, a one-dimensional, vertically averaged model of reservoir water quality. A quasi two-dimensional scheme was necessary to represent the spatial relationship of macrophytes in reservoirs adequately. The macrophyte processes modeled were photosynthesis, dark respiration, excretion and nonpredatory mortality. Process equations for...
Accretion and canal impacts in a rapidly subsiding wetland II: Feldspar marker horizon technique
Donald R. Cahoon, R.E. Turner
1989, Estuaries (12) 260-268
Recent (6–12 month) marsh sediment accretion and accumulation rates were measured with feldspar marker horizons in the vicinity of natural waterways and man-made canals with spoil banks in the rapidly subsiding environment of coastal Louisiana. Annual accretion rates in aSpartina alterniflora salt marsh in the Mississippi deltaic plain averaged 6 mm...
Metabolism of pentachlorophenol by fish
G. R. Stehly, W. L. Hayton
1989, Xenobiotica (19) 75-81
Interspecies variability in the metabolism of pentachlorophenol (PCP) was investigated by exposing rainbow trout, fathead minnows, sheepshead minnow, firemouth, and goldfish to water-borne super(14)C-PCP for 64 h. The amounts of metabolites in bile and exposure water were species-dependent; all of the metabolites excreted into the water...
Body weight and composition dynamics of fall migrating canvasbacks
J.R. Serie, D.E. Sharp
1989, Journal of Wildlife Management (53) 431-441
We studied body weights and composition of canvasbacks (Aythya valisineria) during fall migration 1975-77 on stopover sites along the upper Mississippi River near La Crosse, Wisconsin (Navigational Pools 7 and 8) and Keokuk, Iowa (Navigational Pool 19). Body weights varied (P < 0.001) by age and sex without interaction. Weights...
Wetland bird seasonal abundance and habitat use at Lake Earl and Lake Talawa, California
S.L. Funderburk, P. F. Springer
1989, California Fish and Game (75) 85-101
A study of wetland bird composition, seasonal abundance, and habitat use was conducted on Lake Earl and Lake Talawa in Del Norte County, California from July 1974 through February 1976. Ninety-five species were recorded. Most birds occurred from October to December and during March and April. Diving ducks occurred primarily...
Disposition of pentachlorophenol in rainbow trout (Salmo gairdneri): Effect of inhibition of metabolism
G. R. Stehly, W. L. Hayton
1989, Aquatic Toxicology (14) 131-148
The accumulation kinetics of pentachlorophenol (PCP) were investigated in rainbow trout (Salmo gairdneri) in the absence and presence of 25 mg/1 salicylamide, an inhibitor of PCP metabolism. After exposure to 5 μg/1 PCP over 1–96 h, the amount of PCP in the whole fish, its concentration in water and the...
Rising water levels and the future of southeastern Louisiana swamp forests
W.H. Conner, M. Brody
1989, Estuaries (12) 318-323
An important factor contributing to the deterioration of wetland forests in Louisiana is increasing water levels resulting from eustatic sea-level rise and subsidence. Analyses of long-term water level records from the Barataria and Verret watersheds in southeastern Louisiana indicate an apparent sea level rise of about 1-m per century, mainly...
Carbonate deposition on tail feathers of ruddy ducks using evaporation ponds
N.H. Euliss Jr., R. L. Jarvis, D.S. Gilmer
1989, Condor (91) 803-806
Substantial carbonate deposits were observed on rectrices of Ruddy Ducks (Oxyura jamaicensis) collected during 1982-1984 on evaporation ponds in the San Joaquin Valley, California. Carbonate deposits were composed of about 75% aragonite and 25% calcite, both polymorphous forms of CaCO3. Significantly more carbonate deposits were observed on Ruddy Ducks as...
Importance of individual species of predators on nesting success of ducks in the Canadian prairie pothole region
Douglas H. Johnson, Alan B. Sargeant, Raymond J. Greenwood
1989, Canadian Journal of Zoology (67) 291-297
We followed 3094 upland nests of several species of ducks. Clutches in most nests were lost to predation. We related daily nest predation rates to indices of activity of eight egg-eating predators, precipitation during the nesting season, and measures of wetland conditions. Activity indices of red fox (Vulpes vulpes), striped...
