TABLE l.-Density indices ±SD and number caught per tan ( x IQ-^") in parentheses for netable 

 seabird speces in different oceanographic areas; the number of '^-h transects are shown below each 

 area name. 



Species 



Transitional 



Domain 



(27) 



Laysan albatross. 



Diomedea immutabilis 

 Northern fulmar, 



Fulmarus glacialis 

 Flesh-footed shearwater,' 



Puffinus carneipes 

 Sooty shearwater. i,i 



P. griseus 

 Short-tailed shearwater, 1,2 



P tenuirostns 

 Fork-tailed storm-petrel, 



Oceanodroma furcate 

 Common murre,' 



Una aalge 

 Thick-billed murre,' '^ 



U lomvia 

 Ancient murrelet,' 



Synthliboramphus antiquus 

 Parakeet auklet,' 



Cyclorrhynchus psittaculus 

 Cassin's auklet,' 



Ptychoramphus aleuticus 

 Least auklet,' 



Aethia pusilla 

 Crested auklet,' 



4, cnslatella 

 Rhinoceros auklet,' 



Cerorhinca moncerata 

 Horned puffin,' 



Fratercula corniculata 

 Tufted puffin,' 



Lunda cirrhata 



0.1 ±0.1 



(2.0) 

 3.2±5.6 



.1 

 (0.3) 



4±.8 

 (18.0) 



(0.6) 

 1.9±1.8 



.1+.2 



.2 ±.2 



(■6) 



.2±.2 



(3.0) 



W Subarctic 

 Gyre 

 (36) 



Alaskan 



Stream 



(24) 



Bering 

 Gyre 

 (97) 



Bering 



Current 



(8) 



' Species that feed principally beneath the sea surface 

 ^For correlation between density index and catch rate. 



by diving or pursuit plunging. 



P <0 05; Spearman's rank correlation. 



Table 2. — The number of individuals by species caught in net meshes of various sizes (stretched).' 



' Does not include thick-billed murre of Hoyo Maru set 17 or ancient murrelets of set 20; net retrieval was not observed. 

 ^Significantly fewer than the other three classes (P<0.01; Sokal and Rohlf 1969:608). 

 3 No significant difference in catch rates (P>0.05). 

 "Significantly higher than the other three classes (P<0.05). 



definitions), all were entangled at least once and 

 were also entangled deeper in the nets than just 

 the upper meter (Good and Ainley unpubl. data). 

 Only 3 (17%) of the other 18 species we observed at 

 sea were caught in the nets. Almost all of these 



feed at the surface by scavenging, dipping, or by 

 shallow plunges; the 3 caught were the most 

 abundant scavengers of the area: laysan albatross, 

 northern fulmar, and fork-tailed storm-petrel. Di- 

 rect observations of their behavior and examina- 



803 



