J J Johnston

..The appearance of CPTH in the breast muscle tissue immediately after feeding was not anticipated. The potential secondary hazard posed by the targeted birds to potential scavengers and predators was also evaluated...

..These results indicate that the advantages of using acetaminophen to reduce brown tree snake populations on Guam outweigh the minimal risks to nontarget feral and wildlife species...

..This approach permits the expeditious evaluation of formulations and dosing regimes by simply monitoring blood DNC concentrations in target species...

..For maximum effect in the field, NCZ should be coated onto corn. A higher concentration of NCZ is needed in pelleted feed to obtain comparable plasma DNC levels to allow for the decreased absorption of DNC...

..1 and 91.0%, respectively. The mean recovery for sera fortified at 5 levels ranging from 35 to 2000 ppm was 84.9%. Method limits of detection were approximately 14 and 13 ppm for feed and sera, respectively...

..The mean recovery of DNC in fortified chicken plasma samples was 99.7 +/- 1.9% for 0.18 and 9.1 ppm DNC, and in fortified duck and goose plasma samples was 99.5 +/- 4.9% and 101.4 +/- 4.5%, respectively, for 0.18, 9.1, and 18 ppm DNC...

..5%, respectively. The linear response of rotenone standard solutions was assessed from 0. 025 to 0.25 microg mL(-)(1) (r(2) = 0.9968) and from 0.250 to 125 microg mL(-)(1) (r(2) = 0.9999). The method was simple, rugged, and reliable...

..Further research using higher NCZ levels needs to be conducted to determine whether NCZ can inhibit reproduction in waterfowl...

..The CPT/beta-cyclodextrin adduct increased retention of CPTH from 43 to 70% upon simulated weathering. The retention was independent of the adhesives used for attachment...

..Recoveries from control surface water samples fortified at 5.0, 10, 50, and 100 ng/mL methiocarb averaged 92 +/- 7%. A method limit of detection for methiocarb in rice field surface water was estimated to be 0.23 ng/mL at 223 nm...

..The results indicated that the attractants elicited significantly different behavioral profiles...

..009). Despite revealing low levels of population structure, the high multilocus polymorphism indicates these loci will be valuable in the genetic analysis of behavior and reproductive strategies in this species...

..If registered, wildlife managers may be able to use 20,25 diazacholesterol when other methods, such as lethal control, are undesirable for reducing damage caused by specific breeding behaviors such as the building of nests...

..This approach is particularly useful as a nonlethal approach for monitoring pesticide contamination in small animals for which the volume of blood is limiting...

..This modeling indicates that the analysis of three cartridges from each of five different lots would produce mean values for both active ingredients that are within 5% of the true mean >99% of the time...

..Using this technique and a modification of a previously reported extraction procedure, cabergoline could be determined in coyote plasma at concentrations as low as 9 pg of cabergoline/mL of plasma...

..This situation could contribute to low biomarker detection rates and suggests that formulation modification should be considered...

..As PPZHCl formulations must be stable when stored at 5 to 40 degrees C for 6 to 12 months, reformulation with the anti-oxidant ascorbic acid was utilized to achieve the required PPZHCl stability...

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..Also, no acute toxicity was noted for snails and slugs that feed on diphacinone baits...

..Increased retention time is observed for CPT HCl at the higher pH. The two methods have been useful in characterizing different bait formulations in an ongoing pesticide formulation improvement program...

..Diphacinone residues in slug tissue ranges from 1.3 to 4.0 mg/kg for Deroceras laeve and < MLOD to 1.8 mg/kg for Limax maximus, respectively. The mean recoveries from slugs at 0.20 and 2.0 mg/kg are 91% +/- 15% and 86% +/- 5%...

..4 h for blackbirds. The radioactivity in blackbird kidney tissues did not change significantly for the duration of the test, pointing toward the kidney as a possible site of action for this important agricultural chemical...

..338, 0.341, 0.698, and 0.034 microg/g were detected in ants, fly adults, fly larvae, and beetles, respectively. This information collected with the HPLC/MS method is critical for assessing potential non-target hazards for insectivores...

..The MLODs for the same three lettuce tissues were 0.055, 0.058, and 0.077 microg g(-)(1), respectively. These methods were used to quantify AQ residues from field-grown, treated lettuce and associated fortified quality control samples...

..5 microg fortified samples (n=3) had mean recoveries of 91, 94 and 97% and intra-day (n=3) recoveries at the same fortification levels of 103, 94, and 92%. The method has been used successfully in excretion studies of nicarbazin in ducks...

..95 days. Control grit had a half life of 12.7 days based on weight loss. Analysis of blood and feces for monitoring release from the grit and approximate indirect plasma levels of the active ingredient proved feasible...

..The elevation of blood desmosterol levels is being used as an indicator of 20,25-diazacholesterol absorption and to facilitate the development of a 20,25-diazacholesterol-based contraceptive for pest wildlife...

..DNC levels in the eggshells were highly correlated with feed dose...

..Our method allows for the estimation of nicarbazin consumption and DNC dose in eggs under field conditions, which is important in developing an effective infertility agent for over-abundant non-migratory goose populations...

..015 to 0.035 microg/g. The reported method is much simpler than and equally efficient as previous methods developed for the determination of DNC residues in egg contents...

..Carvone recovery is approximately 80% with excellent precision (< 4%). The method limits of detection obtained from 2-carene and carvone fortified samples are 4.7 and 13.5 microg/g, respectively...

..These results indicate that mixtures of theobromine and caffeine have the potential to be developed into a selective, effective, and socially acceptable toxicant for the control of pest coyotes...

..Some analyte loss is observed from plasma samples stored for five weeks at -12 degrees C. However, storage of extracts on the SPE columns affords excellent stability...