Results 181 to 190 of about 4,545,157 (230)

FRESHWATER MUSSEL DIE-OFF ATTRIBUTED TO ANTICHOLINESTERASE POISONING

Environmental Toxicology and Chemistry, 1995
Abstract In 1990, we investigated a die-off of freshwater mussels in north-central North Carolina. An estimated 1,000 mussels of several species were found dead or moribund, including about 111 Tar spinymussels (Elliptio steinstansana) a federally listed endangered species.
W. J. Fleming, T. P. Augspurger, J. A. Alderman   +2 more
openaire   +1 more source

Modeling enteric bacterial die-off: A review

Water, Air, & Soil Pollution, 1986
To protect surface and groundwater resources from enteric bacterial pollution, management practices must be devised based on a sound knowledge of the fate of these organisms in the environment. Areas covered in this article include the effects of physical and chemical characteristics of the environment, mathematical modeling approaches of bacterial die-
S. R. Crane, J. A. Moore
openaire   +1 more source

Bacterial die-off and stream transport studies

Water Research, 1980
Abstract Two approaches to bacterial die-off studies are reported. In one study the tracer Serratia marcescens was released into a small stream, was recovered for 22 days and traced for a total distance of 20 km. The other study was carried out in Lake Ontario and Hamilton Bay using membrane filter chambers and E. coli, Streptococcus faecalis and
Dutka, B.J., Kwan, K.K.
openaire   +1 more source

A Merganser Die-Off Associated with Larval Eustrongylides

Avian Diseases, 1964
Although several species of Eustrongylides have been reported from mergansers, there is only one report in the North American literature of merganser losses due to nematodes of this genus. Giltner (4) included a report by J. E. Shillinger, U.S. Bureau of Biological Survey, which mentioned losses due to Eustrongylides mergorum among these fish-eating ...
L. N. Locke, J. B. DeWitt, C. M. Menzie, J. A. Kerwin   +3 more
openaire   +1 more source

Optimum pond depths for bacterial die-off

Water Research, 1988
Abstract Analysis of optimum pond depths on the basis of minimum cost for the same bacterial removal efficiency were presented. The cost function depends on pond performance, C / C 0 . However, except in the case of dispersed flow ponds, the pond performance has no effect on optimum pond depths.
H.Z. Sarikaya, A.M. Saatci
openaire   +1 more source

Bacterial Die‐Off in Waste Stabilization Ponds

Journal of Environmental Engineering, 1987
A rate model has been given for the bacterial die-off in waste stabilization ponds. Die-off rate has been expressed as the sum of die-off rate in the dark and the die-off due to light. The proposed rate model has been calibrated and verified by using the results of beaker experiments and coliform removal data found in the literature for the pilot and ...
H. Z. Sarikaya, A. M. Saatçi
openaire   +1 more source

Effect of Pond Depth on Bacterial Die‐Off

Journal of Environmental Engineering, 1987
The depth dependence of bacterial die-off was demonstrated experimentally both in batch models and in three pilot-scale waste stabilization ponds with water depths of 0.5m, 1.0m, and 1.5m. The dimensions of the ponds in plan were 1.0 × 2.0m. The ponds were fed with secondary effluent of a two-stage trickling filter plant.
H. Z. Sarikaya, A. M. Saatçi, A. F. Abdulfattah   +2 more
openaire   +1 more source

Pronghorn Die-off in Trans-Pecos Texas

The Journal of Wildlife Management, 1966
Pronghorn antelope (Antilocapra americana) numbers on the Marfa Flat, comprising 75,000 acres in Presidio County, Texas, declined from 484 in June, 1964, to 148 in June, 1965. Nearly 60 percent (274) of the original number died from causes other than hunting. Pronghorns were confined on this area by net-wire fences.
T. L. Hailey, Jack Ward Thomas, R. M. Robinson   +2 more
openaire   +1 more source

Climate change triggers forest die-off

New Scientist, 2007
Pines in California's Sierra Nevada are dying off, a portent of the impact global warming will have on ...
openaire   +1 more source

The frequency and severity of catastrophic die‐offs in vertebrates

Animal Conservation, 2003
AbstractRare bouts of extreme environmental perturbations (catastrophes) have been predicted to have a major influence on the probability of extinction. Yet very little information is available on the frequency and severity of catastrophes. Improving the available information concerning catastrophe parameters would allow for an evaluation of their ...
Reed, David H., O'Grady, Julian J., Ballou, Jonathan D., Frankham, Richard   +3 more
openaire   +1 more source