DDE residues and eggshell changes in Alaskan falcons and hawks - Dataset 04737

Citation

DDE residues and eggshell changes in Alaskan falcons and hawks

Chemical

DDE (4,4'-)

Species Name

Falco peregrinus

Scientfic Name Search

Falco peregrinus (Peregrine Falcon)

Common Name Search

Peregrine Falcon (Falco peregrinus)

Toxicity Endpoint Type

TOX-REPRO - physiology

Sex

Female

Life Cycle Stage

Adult

State(s), province(s), or territories

Alaska

Dataset PK

04737

Endpoint Description

eggshell thickness compared to pre-1947 reference eggs

Sample Size

23 eggs (tundra pop.); 14 eggs (taiga pop.); 11 eggs (Aleutian pop.)

Endpoint Value

21.7% decrease (tundra population); 16.8% decrease (taiga population); 7.5% decrease (Aleutian population)

Specific Location

Colville River (tundra); Yukon River (taiga); Amchitka Island (Aleutian)

Tox Exposure

mean concentration in eggs, ppm, lipid basis: 889 (tundra); 673 (taiga); 167 (Aleutian)

Tox Exposure Technique

environmental contamination

Tox Exposure Duration

NR

Statistical Significance

Y

Study Duration

1967-1970

Remarks

Linear relationship between eggshell thickness and DDE concentrations in eggs is described by the equation: thickness = 2.15 - 0.316(DDE conc.); r = -0.745.

Review

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