938 



Fishery Bulletin 97(4), 1999 



29 32 35 38 41 44 47 50 53 56 59 52 



28 31 34 37 40 43 46 49 52 55 58 61 

 30 33 36 39 42 45 48 51 54 57 60 63 



Tow number 



00 16 

 0-10 

 10-20 

 20-30 

 30^0 

 40-50 



[•■-• • • •! 



55SSSSSSSSXX3SSS3SSS3 



5S?SXSSSSXS3 



T- 

 10 



I 



40 



— r- 



50 



— r- 



70 



Larvae / 1000m3 



Figure 18 



Paralichthys californicus larvae (no./lOOO m*) in MESSHAI tows. Average from ( Al deep and (Bi 

 shallow tows at inshore (solid) and offshore i shaded i stations; iC) densities in 0-40 m stratum 

 from sequential deep tows at inshore station; (D) densities in 0-40 m stratum (average of pooled 

 10-m strata) from sequential shallow tows at inshore station; average from (E) deep and (Fi 

 shallow tows at inshore station before storm (cross-hatching) and after storm (hatching). 



density peak was more pronounced and was about 10 m 

 shallower than at the offshore station. Probably this 

 peak was related to the relatively shallow mixed layer 

 at the slope station compared with the offshore sta- 

 tion. Eggs of the anchovy had a shallower distribution 

 than the larvae, with an apparent density peak in the 

 neuston. The effect of the different mixed layer depths 

 at the two stations is evident in the slightly deeper lower 

 distribution boundary of eggs at the offshore station. 



Like the anchovy, the nearshore shelf species (white 

 croaker, queenfish, California halibut, California pom- 



pano, and some sanddab species) had shallow larval 

 distributions essentially limited to the upper 30 m of 

 the water column of the inshore station, with peak den- 

 sities in either the 0-10 m or 10-20 m strata. Such 

 shallow distributions appear to be typical of nearshore 

 species although previous studies have lacked the fine- 

 scale sampling capability needed to show this. The 

 many Sebastes species occupy a wide range of habitats 

 on the shelf and upper slope and produce larvae that 

 are found within and below the thermocline and that 

 generally avoid the upper mixed layer, except for the 



