large in spring but much smaller in the fall. 

 Conversely, numbers of T. spinifera were 

 significantly larger in the fall than in the 

 spring. This increase in abundance oi T_. spini- 

 fera may be associated with upwelling that oc- 

 curs during summer off Washington and Van- 

 couver Island (Doe, 1955). The high abundance 

 of T, spinifera in the southern part of its range 

 has been associated with centers of upwelling 

 by Brinton (1962a). 



Of the remaining euphausiid species, N. dif- 

 ficilis was found in significant numbers only 

 in the fall at stations 27 and 28 where it con- 

 stituted 31 and 27 percent, respectively, of 

 the total euphausiid catch and included egg- 

 bearing females. T^, raschii was taken only at 

 station 20 in the mouth of the Strait of Juan de 

 Fuca. Other species appeared only sporadically 

 in the samples. 



Other Groups 



Larval and postlarval benthic fishes were 

 identified as belonging to the families Cottidae, 

 Scorpaenidae, Hexagrammidae, Liparidae, 

 Pleuronectidae, and Agonidae. Fourteen spe- 

 cies of mesopelagic, epipelagic, and neritic 

 fish were identified (table 3). 



Mesopelagic fishes were numerous over the 

 continental slope but were not collected over 

 the shelf (table 4). They were in only 2 of 18 

 samples along the outer edge (183 m.) of the 

 shelf (station 1 in spring and station 39 in fall). 

 Pearcy (1964) found a similar distribution of 

 mesopelagic fishes over the continental slope 

 and shelf off the coast of Oregon. 



Table 3.— List of fishes collected by Isaacs-Kldd mldwater 

 trawl off Vancouver Island and Washington, spring 

 and fall 1963 



Mesopelagic Epipelagic and neritic 



Bathylagidae: Engraulidae 



Bathylagus paciflcus En^raulis mordajc 



Melanostomiatldae: Osmeridae 



Tactostoma macropus Thalelchthys pacificus 



Jfyctophidae: Scomberesocidae 



Electrons arctica A Cololabis salra 



Myctophum califomiense 2 



Tarletonbeania crenxilari.'^ Anoplopomatidae 



Diaphus theta Anoplopoma fimbria 



Lampanyctus leucopsarus -^ 



Lampanyctus ritterl Anmodytidae 



Ammodytes hexapterus 

 Paralepldidae: 



Lestidium rln^ens 



^ Scientific name has been changed to Protomyc tophum 

 crockerl. 



3 Scientific name has been changed to Stenobrachius 

 leucopsarus . 



Mysids were caught only in fall at the near- 

 shore stations south of line VI. Five species 

 were identified: Neomysis kadiakensis , N. 

 rayii , N. americana , Acanthomysis macropsis , 

 and A. columbiae . N. kadiakensis was the domi- 

 nant mysid except at station 20 at the mouth 

 of the Strait of Juan de Fuca. N. rayii was at 

 only two stations; it was the dominant mysid 

 at station 20 but contributed only about 3 per- 

 cent, by number, to the total mysid catch at 

 station 23. The limited distribution of N. rayii 

 was similar to the distribution of the 

 euphausiid, Thysanoessa raschii. 



Table 4. — Numbers of mesopelagic fishes collected in individual trawl samples from the surface 

 to 30-m. depth interval, over different depths of water off Vancouver Island and Washington, 

 spring and fall 1963 



Meters -----------________ -Number- 



17 



