USGS · 70238522
No abstract available.
Explore connections, maps & timelines
E. R. Quortrup, R. L. Sudheimer. 1942. Research notes on botulism in western marsh areas with recommendations for control. https://pubs.usgs.gov/publication/70238522
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
Summary of work on pheasant nutrition conducted since 1949 at the Patuxent Research Refuge. Pheasant chicks fed experimental diets failed to develop normally on protein levels of 15 and 18%. With 22% protein they grew at a reduced rate as compared to those on 28%. Protein level of the reproductive diet was shown to be important; low production of eggs and young resulted from levels below 25%. Calcium was found to be even more critical than protein level for reproduction; birds on a winter diet that furnished 145 mg./kg. per day had poor reproductive success the following spring. About 600 mg./kg. of Ca per day was necessary in the reproduction diet. Birds on an intermediate level of Ca (about 0.5% of diet) showed evidence of cumulative deficiency. It was concluded that pheasants receiving levels of Ca no higher than 0.5% in nature might display 'straggling failure' such as has been observed in several midwestern areas.
Explore the source record for details and available documents.
Explore the source record for details and available documents.