DDE was present in sufficient concentrations to account for significant eggshell thinning in 1946 in Great Britain and as early as 1948 in California. Later, he would apply similar methods to California condor eggshell fragments as evidence that this species was extremely sensitive to DDE.
DDE was present in sufficient concentrations to account for significant eggshell thinning in 1946 in Great Britain and as early as 1948 in California. Later, he would apply similar methods to California condor eggshell fragments as evidence that this species was extremely sensitive to DDE.