Table 1. Numbers of samples (clutches) of eggs of Alaskan seabirds collected at different sites in 1973-76. (See Figure 1 for locations of sites.) 





Species# 



Region and collection site _ 






(specific locations included) CL NF F-tSP LSP D-eC PC R-fC ACG G-wG MG BAK ArT AIT CM T-bM PG AM HP TP Total 
Gulf of Alaska 
Copper River Delta (Copper Sands: 36 36 
Egg Island: Strawberry Reef) 
Hinchinbrook Island (Porpoise 10 10 10 30 
Rocks) 
Middleton Island ll 10 10 10 4] 
Barren Islands 4 2 9g 8 16 
Amalik Bay 5 5 
Kodiak Island (Cathedral Island: ] 7 5 ll 3 10 AT 
Chiniak Bay) 
Uvaiushak Island 4 ] 13 7 6 4 2 99 59 
Semidi Islands (Chowiet Island: 16 10 7 33 
Kateekuk Island) 
Shumayin Islands (Hall Island) 10 6 16 
Aleutian Islands 
Bogoslof Island 3 7 10 
Buldir Island 7 ll 2 l 3 l 8 5 1 2 45 
Attu Island (Massacre Bay) 6 6 
Bristol Bay 
Round Island 6 4 10 
Shaiak Island 3 3 3 5 6 20 
Pribilof Islands 
St. George Island 6 ll 17 
St. Paul Island 10 10 20 
Seward Peninsula 
Bluff Seabird Cliffs g 10 19 
king Island 10 10 
Totals ] 29 1] ll 7 13 l l 123 5 62 3 6 65 24 4 5 5 71 440 
aL = common loon, Gavia dnmer; NF = northern fulmar. Fulmarus glacialis; F-tSP = fork-tailed storm-petrel, Oceanodroma furcata; LSP = Leach’s 
storm-petrel, O. lewcorhoa: D-cC = double-crested cormorant. Phalacrocorax auritus; PC = pelagic cormorant. P. pelagicus; R-f(C = red-faced cormorant, 
P. urile; ACG = Aleutian Canada goose. Branta canadensis leveoparcia; G-wG = glaucous-winged gull. Larus glaucescens,; MG = mew gull, L. canwus; 
BK = black-legged kittiwake, Rissa tridactyla: ArT = arctic tern, Sterna paradisaea;, AIT = Aleutian tern, S. aleufica; CM = common murre, Uria aalge; 
T-bM = thick-billed murre, U. lomeia; PG = pigeon guillemot, Cepphus columba; AM = ancient murrelet, Synthliboramphus antiquus; HP = horned 
puffin, Fratercula corniculata: TP = tufted puffin, Lunda cirrhata. 
and PCB’s were similar to the procedures used for the 
analysis of carcasses of bald eagles (Haliaeetus leucoceph- 
alus) (Cromartie et al. 1975), except that glass thimbles 
were used. Also, special precautions were taken in rinsing 
the glassware because we wanted a high level of sensi- 
tivity. For eggs collected in 1973 and 1974, and most of 
those collected in 1975, the procedure for separation of 
pesticides from PCB’s was identical to that described by 
Cromartie et al. (1975). The samples were analyzed with 
a gas-liquid chromatograph equipped with an electron- 
capture detector, automatic sampler, digital processor, 
and 4% SE-30/6% QF-1 column at 190°C. 
For the rest of the eggs collected in 1975 and all of those 
collected in 1976, the organochlorines were separated into 
four fractions (rather than three) to insure the isolation of 
dieldrin and endrin into one individual fraction. These 
four fractions were analyzed as described above except 
thata 1.5% OV-17/1.95 % QF-1 column was used because 
it separated cis-chlordane from trans-nonachlor. (This 
method was adopted as our laboratory’s standard practice 
before the more recent Alaskan samples had been ana- 
lyzed.) However, to make the more recent data compa- 
rable with those for 1973-75, the values for cis-chlordane 
and trans-nonachlor were combined. The amount of trans- 
nonachlor was usually greater than the cis-chlordane in 
the samples where these compounds were measured sepa- 
rately. 
Most pesticides (excluding toxaphene) and the PCB’s in 
all the samples were quantitated as described by Cro- 
martie et al. (1975). The procedure for quantitation of 
toxaphene in the 1974-76 eggs was the same as described 
by Prouty et al. (1977). 
Residues in 10% of the samples were confirmed with an 
LKB 9000 or Finnigan 4000 series gas chromatograph- 
mass spectrometer. Operating conditions for the LKB 
were listed by Cromartie et al. (1975). For the Finnigan 
they were as follows: flow rate, 30 mL/min helium; 
al.5% OV-17/1.95% QF-1 column temperature-pro- 
grammed at 2°C per min from 140°C to 225°C; separa- 
tor, 235°C; and ion source, 300°C. 
Samples were analyzed for 13  organochlorines: 
p.p'-DDE, p.p’-DDD, p,p'-DDT, dieldrin, heptachlor 
epoxide, mirex, oxychlordane, cis-chlordane (or trans- 
nonachlor), cis-nonachlor, HCB, toxaphene, endrin, and 
PCB’s. (Chemical names for these compounds are given in 
Appendix II.) 
Average recoveries of pestic 
domestic chicken eggs ranged f 
ides and PCB’s from spiked 
rom 83 to 104%. Residue 
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