Trade-off between DDT pollution and malarial parasite control

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Presentation transcript:

Trade-off between DDT pollution and malarial parasite control Should the trade-off be the environment or human health? After the ban on DDT: Predator bird #s have risen drastically Many birds have come of the endangered list DDT in human blood samples have declined DDT has disappeared from breast milk BUTTTTTT… The difficulties of malaria control for some nations is significant Without DDT hundreds of mosquitos can enter a house , compared with no mosquitos entering a house that has been sprayed with DDT In Africa and Indonesia, malaria is more of a problem then HIV

This will be checked tomorrow P. 18 Use the assigned reading articles as well as the lecture notes to discuss the pros and cons of the use of DDT Data Analysis Questions 1-5 This will be checked tomorrow

Application: Analysis of data illustrating the causes and consequences of biomagnification

*1945-1971 DDT was used commercially Analysis questions: Describe the trend shown by the data. Deduce the strength of the correlation of DDT use affecting the number of predator birds Evaluate the limitations of the data in supporting the link between DDT and the decrease in Peregrine Falcons. The initial Raptor Population Index (RPI) analysis effort examined hourly raptor migration count data from seven hawk watch sites in Canada and the United States. The following trend data and graphs indicate the population trends found for each of 15 species observed at Hawk Mountain Sanctuary.

Describe the trend shown by the data in relation to the use of DDT Analysis questions: Describe the trend shown by the data in relation to the use of DDT 5. Estimate the percentage change in egg shell thickness between 1945 and 1958 for high and low values Changes in the thickness of eggshells of the peregrine falcon in Britain. The arrow shows when DDT first came into widespread use.