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Showing 1 to 20 of 156 for “"sublethal"”.
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Culex mosquitoes & insecticides: Resistance and sublethal exposure
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Sublethal Effects of Pesticides on Visually-Guided Bee Behaviours
European honeybees (Apis mellifera) are abundant and effective natural pollinators contributing enormously to mass production of agricultural crops through extensive foraging. They possess visual systems that are highly sensitive to motion and rely on motion of visual elements (optic flow) to …
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Effects of sublethal and lethal temperatures on plant cells
… of monocotyledonous and dicotyledonous plants to sublethal and lethal temperatures. The study had four objectives: I. to compare temperatures that develop in stems and leaves of plants under flame, II. to determine the effect of heat on conduction in the phloem (of stems), III. to investigate some …
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Cellular Responses in ESCHERICHIA COLI to Lethal and Sublethal Doses of Ozone
<p>Ozone is a major component of photochemical smog. High levels of this pollutant, sufficient to affect human health are found in many urban areas worldwide. Though limited studies in humans are supported by extensive findings from animal experiments, a difficulty in interpreting the results of …
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Sublethal vapor-induced responses of the German cockroach to commercial pesticide formulations
The overall purpose of this study was to examine the effects of an insecticide vapor pulse on the dispersal response of the German cockroach, Blattella germanica (L). An apparatus was designed to expose test cockroaches to vapors from commercial pesticide formulations. Insecticide vapor-induced …
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Sublethal dosage effects of carbaryl on honey bee (Apis mellifera (L.)) colonies
The sublethal dosage effects of carbaryl were studied in honey bee (Apis mellifera L.) colonies. Carbaryl was fed to colonies during a 14-day period in a 0.95 M sucrose solution. Carbaryl dosages were based on 0.0036, 0.0178, and 0.0356 ug/bee/day, and concentrations approximated 0.09, 0.44, and …
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Monitoring bluegill swimming behavior and the effects of sublethal ammonium chloride gradients
A video-computer monitoring system was developed for use evaluating the effects of environmental factors and toxicants on fish behavior. The system recorded the X and Y coordinates of individual fish at 4-second intervals in a 50 cm square observation area and subsequently calculated 13 different …
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Sublethal effects of carbofuran and methidathion on reduviolus americoferus (carayon) (Hemiptera: Nabidae)
The objective was to quantify sublethal effects of two insecticides on the common damsel bug, a major predator in alfalfa. Groups of 2-day-old adult nabids were exposed for 12 h to filter paper treated with LC₅ or LC₄₅ carbofuran, or LC₅ or LC₂₅ methidathion. Males that survived the 4-day acute …
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The sublethal effects of 2,4-D dimethylamine on wood frog tadpoles in Saskatchewan
… two experiments were performed to test the sublethal effects of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) on tadpoles of the wood frog (Rana sylvatica). Wood frog tadpoles in the first experiment were exposed to 2,4-D amine at 0.1, 1.0 and 100 ug/L in outdoor microcosms. …
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The role of sublethal stress on mitochondria and the development of cardiac preconditioning
Cardiac preconditioning describes a cell survival program whereby a trigger renders the heart partially resistant to subsequent ischaemia/reperfusion induced cell death.
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Effects of Sublethal Copper Exposure on Escape Behavior and Growth of Rana pipiens Tadpoles
This research is designed to test how sublethal exposure to copper affects tadpole predator-escape behavior and how quickly tadpoles recover. After exposure, tadpoles were separated. Escape behavior was recorded for two-thirds of exposed tadpoles while one-third of the exposed population was …
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Sublethal Hepatic Pathology and Evidence of Intranuclear Effects of the Cyanobacterial Toxin Microcystin -Lr
… by Microcystis aeruginosa. The pathology of sublethal exposure is not well characterized. MCLR immunohistochemistry (MCLR-IHC) studies indicate that the nucleus may be a target of MCLR. Balb/c mice were given one sublethal dose at 45 mug/kg or repeated daily doses for 2, 4 and 7 days. At 2 …
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Sublethal Carbon Monoxide Toxicosis in Newborn Piglets and Weanling Pigs: Physiology, Behavior, and Performance
… were used to determine the effects of elevated, sublethal atmospheric concentrations of carbon monoxide (CO) on physiologic, behavioral, and performance parameters.
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The Effect of Sublethal Heat on The Metabolic Activity of Staphylococcus Aureua Mf-31
Made available in DSpace on 2014-12-09T14:36:58Z (GMT). No. of bitstreams: 1 6901300.pdf: 4473029 bytes, checksum: 17ced8c1d140936807302dfde4b6f2ae (MD5) Previous issue date: 1968
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The lethal and sublethal effects of aldicarb on the estuarine grass shrimp, Palaemonetes pugio
… placed on the quantification of the lethal and sublethal effects of aldicarb on three different life stages of P. pugio. Acute 96-h toxicity tests were conducted with newly hatched larvae, 22-d old larvae and adult grass shrimp to determine lethal toxicant ranges. LC₅₀ values were 85.0 ug/L for …
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Sublethal effects of cadmium and diazinon on reproduction and larval behavior in zebrafish (Brachydanio rerio)
… impacts. Fish are often exposed to lethal and sublethal contaminant concentrations. At sublethal concentrations, there is still a concern that contaminant exposure may influence life history parameters. Sublethal contaminant exposure can impair many reproductive processes, and I was interested …
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Development, Growth, and Behavioral Ecology of Walleye as Influenced by Sublethal Exposure to Dietary Selenium
A decline in the walleye Stizostedion vitreum sport fishery in lower Lake Oahe, South Dakota, was documented in the early l 980's and has since been attributed to poor natural reproduction and/or recruitment. Contaminants are highly suspected in lower Lake Oahe because of the low natural …
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Sublethal effects by deltamethrin and spinosad on the grain weevils Sitophilus zeamais and S. granarius
… cause pest mortality, this may stimulate sublethal effects which may lead to harmful or even beneficial responses that may affect (or not) the behavior and sexual fitness of the exposed insects. One ongoing concern with pesticides use is the impact on non-target organisms, particularly …
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Increase in heat resistance of <u>Listeria monocytogenes</u> Scott A by sublethal heat shock
Log phase cells of Listeria monocytogenes Scott A were heat shocked in Trypticase Soy + 0.6% Yeast Extract broth at 40, 44, and 45°C for 3, 10 and 20 min at each temperature, followed by heating at 55â C for 50 minutes in order to determine an optimum heat shock response. Most heat shock …
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