Auth et al,: Diel variation in vertical distribution of an offshore ichthyoplankton community 



323 



> 100 m 



< 100 m 



200 



150 100 



Ranked similarities 



Figure 3 (continued) 



50 



Depth strata 



€i 



-C: 



-f 



However, in our study we collected no Engraulis 

 mordax (northern anchovy) eggs or larvae, which usu- 

 ally comprise a significant portion of the offshore ich- 

 thyoplankton in August (Richardson and Pearcy, 1977). 

 Engraulis mordax larvae have been associated with 



warmer, less saline, offshore surface waters from the 

 Columbia River (Richardson, 1973; Auth and Brodeur, 

 2006). This warmer surface water did not appear to have 

 occurred as far south as our sampling station, except per- 

 haps during the last haul in 2000 (,HH-05G) (Fig. 2). 



