Abstract--We examined the diel vertical distribution, concentration, and community structure of ichthyoplankton from a single station 69 km off the central Oregon coast in the northeast Pacific Ocean. The 74 depth-stratified samples yielded 1571 fish larvae from 20 taxa, representing 11 families, and 128 fish eggs from 11 taxa within nine families. Dominant larval taxa were Sebastes spp. (rockfishes), Stenobrachius leucopsarus (northern lampfish), Tarletonbeania crenularis (blue lanternfish), and Lyopsetta exilis (slender sole), and the dominant egg taxa were Sardinops sagax (Pacific sardine), Icichthys lockingtoni (medusafish), and Chauliodus macouni (Pacific viperfish). ...

<0.05). Almost 91% of the total egg abundance was found in the upper 100 m of the water column. Egg densities were generally highest near the surface and decreased with depth. There were no S. sagax, C. macouni, or I. lockingtoni eggs found at depths><0.05). Lyopsetta exilis, Sebastes spp., and T crenularis larvae collected at night were generally the same size or larger than those collected during the day at each depth stratum, although these differences were not significant (ANOVA, P><100 m and><0.05) (Table 5). Mean concentrations of L. exilis, S. leucopsarus, and T. crenularis larvae, and S. sagax eggs were also positively correlated with temperature and negatively correlated with salinity, although the correlations were not significant (P>

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