general activity are present; one at about 5° N. and. another at about 12* N. 
These two high-activity zones, and areas to the north, to the south, and be¬ 
tween them, are different enough to be treated as separate sections. Ac¬ 
cordingly, each of the 24 days spent in the north pelagic section has been 
assigned to one of these sections. 
North of 12° N. 
9, 10, 11 January; 27-28 February; 1, 11, 
12 March; 28-29 April. 
# Miles - 998 
$ Days - 10 
$ Species- 21 
Species 
Percent 
Number 
Sooty Tern 
48.9 
290 
Wedge-tailed Shearwater 
13.3 
79 
Jaeger sp. . 
6.1 
36 
White-tailed Tropicbird 
5 A 
32 
Red-footed Booby 
3.7 
22 
Blue-faced Booby 
3.4 
20 
Bulwer Petrel 
2.5 
15 
Common Noddy 
2.1 
13 
Pterodroma externa 
2.1 
13 
31ack-footea Albatross 
1.7 
10 
Misc. Shearwater/Petrel 
.. 1.7 
10 
• 
Frigatebird sp. 
\ 1.5 
9 
Sooty/Slender-billed Sh. 
v 1.2 
7 
Storm Petrel 
0.8 
5 
Brown Booby 
0.7 
4 
3ooby sp. 
0.7 
k 
White Tern 
0.7 
4 
Misc. Birds 
0.7 
4 
Shearwater sp. 
0.5 
3 
Red-tailed Tropicbird 
0.5 
3 
Dark-rumped Petrel 
0.3 
2 
Small Pterodroma 
0.3 
2 
Pterodroma sp. 
0.3 
2 
Newell Shearwater 
0.2 
1 
Mottled Petrel 
0.2 
1 
Tropicbird sp. 
0.2 
1 
Phalarope sp. 
0.2 
1 
100 
593 
A diverse but low-density area in the relatively nonproductive north 
Pacific central waters. Black-footed Albatross, White-tailed Tropicbird, 
Dark-rumped Petrel, and Jaegers are the most unique elements oi the sec¬ 
tion. The effect of breeding birds from the Hawaiian Islands is noticeable 
but not overly strong -- Common Noddy, Sooty Tern, Red-footed Boooy, 
Wedge-tailed Shearwater (light phase), and White-tailed Tropicbird. As 
mentioned in the offshore account for Oahu, the waters south oi the island 
are sometimes low-density areas. Wedge-tails and Sooty Terns are sporacic 
over most of this expanse, both becoming commoner close to Oahu, particularly 
when populations are breeding there (as was noted in late April). 
