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J.V. Derby

Publications and source records attributed to J.V. Derby.

6 recordsLinked to original sources
USGS1955

DDT vs. wildlife: Relationships between quantities ingested, toxic effects and tissue storage

Young and adult quail and pheasants were fed diets containing DDT. Chemical analysis of tissues indicated that quantities of DDT stored were not proportional to total amounts administered nor to duration of exposure, but were related to the severity of toxic symptoms. Concentration of the toxicant in breast muscle of birds dying of acute DDT poisoning was approximately 34 jug./ Gm.in adult quail and 22 jug./Gm.in adult pheasants.

Journal of the American Pharmaceutical Association↗
USGS1950

Phosphorus poisoning in waterfowl

Black ducks and mallards were found to be highly susceptible to phosphorus poisoning. 3 mg. of white phosphorus per kg. of body weight given in a single dose resulted in death of a black duck in 6 hours. Pathologic changes in both acute and chronic poisoning were studied. Data are presented showing that diagnosis can be made accurately by chemical analysis of stored tissues in cases of phosphorus poisoning.

Journal of the American Pharmaceutical Association↗
USGS1949

Calcium and phosphorus requirements of breeding bobwhite quail

In the course of studies designed to determine the calcium and phosphorus requirements of breeding bobwhite quail, it was found that best results were obtained when the Ca/P ratio in the diet was approximately 2.3:1. Variations in the Ca/P ratio produced significant differences in results when the level of phosphorus in the diet was 0.75%, but the differences were less marked when the level of phosphorus was increased to 1.00%. Although diets containing 0.75% phosphorus and 1.8% calcium appeared adequate for reproduction, as judged by the criteria of the maintenance of satisfactory condition in the breeders, egg production, fertility, hatchability and survival of offspring during the first 5 days after hatching, it was found that the winter mortality of the offspring of birds fed such a diet was much greater than that occurring in the offspring of birds fed on diets containing 1.00 or 1.25% phosphorus. It is concluded that breeding bobwhite quail require diets furnishing approximately 1.00% phosphorus and 2.3% calcium.

Journal of Nutrition↗