448 
Fishery Bulletin 1 10(4) 
Bottom, D. L., C. A. Simenstad, J. Burke, A. M. Baptists, D. A. 
Jay, K. K. Jones, E. Casillas, and M. H. Schiewe. 
2005. Salmon at river’s end: the role of the estuary in the 
decline and recovery of Columbia River salmon. NOAA 
Tech. Memo. NMFS-NWFSC-68, 246 p. 
Bottom, D. L., B. E. Riddell, and J. A. Lichatowich. 
2006. The estuary, plume, and marine environments. In 
Return to the river: restoring salmon to the Columbia 
River (R. N. Williams, ed.), p. 571-600. Elsevier Aca- 
demic Press, Burlington, MA. 
Brodeur, R., J. Fisher, R. Emmett, C. Morgan, and E. Casillas. 
2005. Species composition and community structure of 
pelagic nekton off Oregon and Washington under vari- 
able oceanographic conditions. Mar. Ecol. Prog. Ser. 
298:41-57. 
Browne, P., J. L. Laake, and R. L. DeLong. 
2002. Improving pinniped diet analyses through iden- 
tification of multiple skeletal structures in fecal sam- 
ples. Fish. Bull. 100:423-433. 
Burke, J. L. 
2004. Life histories of juvenile Chinook salmon in the 
Columbia River estuary, 1916 to the present. M.S. 
thesis, 88 p. Oregon State Univ., Corvallis, OR. 
Campbell, L. A. 
2010. Life histories of juvenile Chinook salmon (Oncorhyn- 
chus tshawytscha) in the Columbia River estuary as 
inferred from scale and otolith microchemistry. M.S. 
thesis, 105 p. Oregon State Univ., Corvallis, OR. 
CCMOP (Center for Coastal Marine Observation and Prediction). 
2010. Virtual Columbia River, Climate Atlas, vers. 0.0. 
[Available at http://www.stccmop.org; accessed April 
2011.1 
Chawla, A., D. A. Jay, A. M. Baptista, M. Wilkin, and C. Seaton. 
2008. Seasonal variability and estuary-shelf interac- 
tions in circulation dynamics of a river-dominated estu- 
ary. Estuaries and Coasts 31:269-288. 
Clarke, K. R. 
1993. Non-parametric multivariate analyses of changes 
in assemblage structure. Aust. J. Ecol. 18:117-143. 
Clarke, K. R. and R. N. Gorley. 
2006. PRIMER, vers. 6: User manual/tutorial, 190 
p. PRIMER-E, Plymouth, U.K. 
Collis, K., D. Roby, D. Craig, B. Ryan, and R. Ledgerwood. 
2001. Colonial waterbird predation on juvenile salmo- 
nids tagged with passive integrated transponders in 
the Columbia River Estuary: Vulnerability of different 
salmonid species, stocks, and rearing types. Trans. 
Am. Fish. Soc. 130:385-396. 
Coutant, C. C., and R. R. Whitney. 
2006. Hydroelectric systems and migration. In Return 
to the River: Restoring salmon to the Columbia River 
(R. N. Williams, ed.), p. 249-324. Elsevier Academic 
Press, Burlington, MA. 
Craig, B. E. 
2010. Life history patterns and ecology of juvenile coho 
salmon (Oncorhynchus kisutch ) within a tidal freshwa- 
ter estuary. M.S. thesis, 85 p. Univ. Washington, 
Seattle, WA. 
Daly, E.A., R. D. Brodeur, J. P. Fisher, L. A. Weitkamp, D. J. 
Teel, and B. R. Beckman. 
2011. Spatial and trophic overlap of hatchery marked 
and unmarked Columbia River Basin spring Chinook 
salmon during early marine residence with implications 
for competition between hatchery and naturally pro- 
duced fish. Environ. Biol. Fishes. doi:10.1007/sl0641- 
011-9857-4. 
Dege, M., and L. R. Brown. 
2004. Effect of outflow on spring and summertime dis- 
tribution and abundance of larval and juvenile fishes 
in the upper San Francisco estuary. Am. Fish. Soc. 
Symp. 39:49-65. 
Di Lorenzo, E., N. Schneider, K. M. Cobb, K. Chhak, P. J. S. 
Franks, A. J. Miller, J. C. McWilliams, S. J. Bograd, H. 
Arango, E. Curchister, T. M. Powell, and P. Rivere. 
2008. North Pacific Gyre Oscillation links ocean climate 
and ecosystem change. Geophys. Res. Lett. 35, L08607. 
doi:10.1029/2007GL032838. 
Duffy, E. J., and D. A. Beauchamp. 
2008. Seasonal piscivory by coastal cutthroat trout 
( Oncorhynchus clarki clarki) in Puget Sound: implications 
for juvenile salmon. Trans. Am. Fish. Soc. 137:165-181. 
Eschmeyer, W. N., E. S. Herald, and H. Hammann. 
1983. A field guide to Pacific Coast fishes, 336 p. Hough- 
ton Mifflin Co., Boston, MA. 
Ford, M. J. (ed.). 
2011. Status review update for Pacific salmon and steel- 
head listed under the Endangered Species Act: Pacific 
Northwest. NOAA Tech. Memo. NMFS-NWFSC-113, 
81 p. 
Fox, D. S., S. Bell, W. Nehlsen, and J. Damron. 
1984. The Columbia River estuary: atlas of physical and 
biological characteristics. Columbia River Estuary Data 
Development Program, Astoria, OR. 
Fresh, K. L., E. Casillas, L. L. Johnson, and D. L. Bottom. 
2005. Role of the estuary in the recovery of Columbia 
River basin salmon and steelhead: an evaluation of 
the effects of selected factors on salmonid population 
viability. NOAA Tech. Memo. NMFS-NWFSC-69, 
105 p. 
Friesen, T. A., J. S. Vile, and A. L. Pribyl. 
2007. Outmigration of juvenile Chinook salmon in the 
lower Willamette River, Oregon. NW Science 81:173-190. 
Giorgi, A. E., T. W. Hillman, J. R. Stevenson, S. G. Hays, and 
C. M. Peven. 
1997. Factors that influence the downstream migra- 
tion rates of juvenile salmon and steelhead through 
the hydroelectric system in the mid-Columbia River 
basin. N. Am. J. Fish. Manage. 17:268-282. 
Groot, C., and L. Margolis (eds.). 
1991. Pacific salmon life histories, 564 p. Univ. British 
Columbia Press, Vancouver, B.C. 
Gustafson, R. G., M. J. Ford, P. B. Adams, J. S. Drake, R. L. 
Emmett, K. L. Fresh, M. Rowse, E. A. Spangler, R. E. Span- 
gler, D. J. Teel, M. T. Wilson. 
2011. Conservation status of eulachon in the California 
Current. Fish Fish. 13:121-138. doi:10.1111/j.l467- 
2979.2011.00418.x. 
Gustafson, R. G., R. S. Waples, J. M. Myers, L. A. Weitkamp, 
G. J. Bryant, O. W. Johnson, and J. J. Hard. 
2007. Pacific salmon extinctions: Quantifying lost and 
remaining diversity. Cons. Biol. 21:1009-1020. 
Haertel, L., and C. Osterberg. 
1967. Ecology of zooplankton, benthos and fishes in the 
Columbia River estuary. Ecology 48:459-472. 
Hard, J. J., R. G. Kope, W. S. Grant, F. W. Waknitz, L. T. Parker, 
and R. S. Waples. 
1996. Status review of pink salmon from Washington, 
Oregon, and California. NOAA Tech. Memo. NMFS- 
NWFSC-25, 131 p. 
Hart, J. L. 
1973. Pacific fishes of Canada, 740 p. Fish. Res. Board 
Canada Bull. 180, Ottawa. 
