Parnel et al.: Effects of oceanic conditions on ichthyoplankton communities in the Columbia River plume 
165 
Table 2 
Taxonomic and stage composition of ichthyoplankton collected during survey cruises conducted by the National Oceanic and 
Atmospheric Administration, National Marine Fisheries Service approximately every two weeks from late April to August 
1999-2004 from two stations located off the Columbia River, Oregon. Occurrence is the number of samples in which the life stage 
of a taxon was found. 
Occurrence 
Density 
Number 
Stage 
Species 
Common name 
(rc=78) 
(no. /1000 nr 3 ) captured 
collected 
Clupeidae 
Sardinops sagax 
Pacific sardine 
4 
0.00899 
86 
Eggs 
Engraulidae 
Engraulis mordax 
Northern anchovy 
52 
7.09502 
118,089 
Eggs 
23 
0.18015 
2435 
Larvae 
Bathylagidae 
Blacksmelts 
18 
0.81678 
11,027 
Eggs 
Chauliodontidae 
Chauliodus macouni 
Pacific viperfish 
2 
0.00012 
2 
Eggs 
Gadidae 
Microgadus proximus 
Pacific tomcod 
13 
0.00278 
32 
Larvae 
Lampridae 
Lampris guttatus 
Opah 
1 
0.00011 
1 
Eggs 
Gasterosteidae 
Stickleback 
1 
0.0001 
1 
Larvae 
Scorpaenidae 
Sebastes spp. 
Rockfish 
2 
0.00021 
2 
Larvae 
Sebastolobus spp. 
Thornyheads 
5 
0.0004 
6 
Eggs 
Hexagrammidae 
Ophiodon elongatus 
Lingcod 
2 
0.00186 
2 
Larvae 
Cottidae 
Artedius spp. 7 
1 
0.00007 
1 
Larvae 
Artedius harringtoni 
Scalyhead sculpin 
2 
0.00031 
5 
Larvae 
Clinocottus acuticeps 
Sharpnose sculpin 
1 
0.00012 
1 
Larvae 
Leptocottus armatus 
Staghorn sculpin 
1 
0.00026 
2 
Larvae 
Ruscarius meanyi 
Puget Sound sculpin 
1 
0.00008 
1 
Larvae 
Liparidae 
Liparis spp. 
Unid. snailfish 
2 
0.00018 
3 
Larvae 
Liparis fucensis 
Slipskin snailfish 
1 
0.00008 
1 
Larvae 
Liparis pulchellus 
Showy snailfish 
2 
0.00025 
3 
Larvae 
Carangidae 
Trachurus symmetrieus 
Jack mackerel 
15 
0.19986 
2178 
Eggs 
Bathymasteridae 
Ronquilis jordani 
Northern ronquil 
1 
0.00095 
12 
Larvae 
Pholidae 
Pholis spp. 
Unid. gunnel 
1 
0.00004 
1 
Larvae 
Icosteidae 
Icosteus aenigmaticus 
Ragfish 
2 
0.00034 
4 
Eggs 
Ammodytidae 
Ammodytes hexapterus 
Pacific sandlance 
2 
0.00187 
2 
Larvae 
Paralichthyidae 
Citharichthys spp. 
Sanddab 
50 
1.66568 
22,186 
Eggs 
1 
0.00008 
1 
Larvae 
Pleuronectidae 
Unid. flounder 
20 
0.04348 
673 
Eggs 
2 
0.00029 
3 
Larvae 
Glyptocephalus zachirus 
Rex sole 
6 
0.00667 
34 
Eggs 
3 
0.00546 
5 
Larvae 
Isopsetta isolepis 
Butter sole 
6 
0.00072 
9 
Larvae 
Lepidopsetta bilineata 
Southern rock sole 
1 
0.00029 
4 
Larvae 
continued 
