Synopsis of Eastern Grid Survey #18 
Luring 732 miles of diurnal observations (68.6 hours) 73 albatross plus 
676 birds of other species were recorded. Total linear density (birds per 
linear mile) was 1.02 with albatross, and 0 . 92 ^ without albatross (see Black¬ 
footed Albatross species account). The density with albatross should be used 
if this parameter is to be of any value. Four sightings totaling 18 marine 
mammals were recorded in the Grid. 
Highlights: 
1 ) Increasing numbers of immature Black-footed Albatross in Grid area. 
2 ) Near random dispersion of winter resident; i.e., not yet showing 
limited distribution as was first noted in January of this year. 
3 ) Presence of non-migrating Sooty Shearwaters. 
k) North section continues to show highest density. 
Two feeding flocks, one consisting of 20 j; Leach Petrels; the other of 
20 j^ Herring Gulls, 5 Jaegers and id" Sooty Shearwaters, were recorded in the 
northeast section of the Grid. 
SPECIES ACCOUNTS 
Black-footed Albatross 
Maximum counts: December 3 * 6 
k : 2 k 
5 : 6 
6 : 10 
7 : 3 ' 
8 : 15 
9 : 9 
10 : ( 1 ) 
Total jk 
(Mean) Average 9*2 
Albatross are omitted from the sectional breakdown analysis in Tables 
2 and 3 because of confusion generated by birds followng the ship from one 
sector to the next, and thus being counted twice. 
The distribution of albatross during the survey was not random. - - - 
---------- etc. ----------- 
Distribution by sector 
24 
6 
11 
10 
8 
9 
9 
15 
1 
