10 
Table 6. Mean concentrations (ppm, wet weight) of organochlorines in eggs of Alaskan seabirds, 1973-76, ranked by 
collection site, by species and compound. Species are included only if at least five eggs were collected at each of two 
or more sites. Compounds are omitted if there were no significant differences (P>0.05) among sites for a particular 
species. 






Geometric Geometric 
Species, compound and site meana Species, compound and site meana 
Northern fulmar Dieldrin 
DDT Amalik Bay 0.025 A 
Semidi Islands 0.048 A Kodiak Island 0.025 Ad 
St. George Island 0.015 B Middleton Island 0.021 A 
Fleptachlor epoxide Shumagin Islands 0.017 AB 
St. George Island 0.005 A Semidi Islands 0.012 ABC 
Sanat Islands <0.001 B Ugaiushak Island 0.009 BC 
Hinchinbrook Island 0.009 BC 
Oxychlordane Copper River Delta 0.005 C 
St. George Island 0.067 A 
Semidi Islands < 0.033 B Heptachlor epoxide 
Kodiak Island 0.025 A 
Cis-chlordane? Hinchinbrook Island 0.014 B 
St. George Island 0.001 A Semidi Islands 0.011 BC 
Semidi Islands ND° B Ugaiushak Island 0.010 BC 
Cis-nonachlor Middleton Island 0.010 BC 
St. George Island 0.003 A Amalik Bay 0.007 BC 
Semidi Islands ND B Shumagin Islands 0.005 BC 
HCB Copper River Delta 0.003 C 
St. George Island 0.055 A Mirex 
Semidi Islands 0.008 B Semidi Islands 0.036 A 
Tienhane Shumagin Islands 0.025 A 
St. George Island 0.051 A Veatushak esis cip-is 
Semidi Islands ND B Kodiak (sland pence 
Copper River Delta <0.001 B 
Hinchinbrook Island ND B 
Middleton Island ND B 
Glaucous-winged gull actalil: Bay eS 
DDE Oxychlordane 
Kodiak Island 0.661 A Shumagin Islands 0.031 A 
Semidi Islands 0.559 AB Semidi Islands 0.031 A 
Middleton Island 0.540 AB Kodiak Island 0.024 AB 
Amalik Bay 0.334 BC Ugaiushak Island 0.021 AB 
Ugaiushak Island 0.298 C Middleton Island 0.020 AB 
Shumagin Islands 0.284 C Hinchinbrook Island 0.014 BC 
Hinchinbrook Island C2770 Amalik Bay 0.008 BC 
Copper River Delta 0.116 C Copper River Delta 0.007 C 
DDD Cis-chlordane 
Semidi Islands 0.010 A Semidi Islands 0.017 A 
Hinchinbrook Island 0.007 AB Kodiak Island 0.013 AB 
Kodiak Island 0.007 AB Middleton Island 0.012 AB 
Ugaiushak Island 0.005 AB Hinchinbrook Island 0.011 ABC 
Middleton Island 0.005 AB Ugaiushak Island 0.010 ABC 
Copper River Delta 0.003 B Shumagin Islands 0.006 BC 
Shumagin Islands 0.002 B Copper River Delta 0.003 C 
Amalik Bay ND B Amalik Bay 0.001 C 
DDT Cis-nonachlor 
Semidi Islands 0.013 A Semidi Islands 0.026 A 
Kodiak Island 0.011 AB Ugaiushak Island 0.004 B 
Shumagin Islands 0.006 ABC Kodiak Island 0.004 B 
Middleton Island 0,004 ABC Amalik Bay 0.002 B 
Ugaiushak Island 0.003 BC Hinchinbrook Island 0.001 B 
Amalik Bay 0.001 BC Copper River Delta 0.001 B 
Copper River Delta <0.001 C Middleton Island <0.001 B 
Hinchinbrook Island ND C Shumagin Islands ND B 
