Growth and survival of pacific coho salmon smolts exposed as juveniles to pesticides within urban streams in western Washington, USA

2014 ◽  
Vol 33 (7) ◽  
pp. 1596-1606 ◽  
Author(s):  
Kerensa A. King ◽  
Christian E. Grue ◽  
James M. Grassley ◽  
Robert J. Fisk ◽  
Loveday L. Conquest
Keyword(s):  
Coho Salmon ◽  
Urban Streams ◽  
Growth And Survival ◽  
Western Washington

Effects of Streamflow and Upwelling on Yield of Wild Coho Salmon (Oncorhynchus kisutch) in Oregon

1981 ◽  
Vol 38 (4) ◽  
pp. 471-475 ◽  
Author(s):  
Dennis L. Scarnecchia
Keyword(s):  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Positive Relation ◽  
Significant Relation ◽  
Oregon Coast ◽  
Growth And Survival ◽  
Coastal Rivers ◽  
High Flows ◽  
Oceanic Upwelling

To investigate the dependence of coho salmon (Oncorhynchus kisutch) yield on streamflow and oceanic upwelling, I regressed catch by the Oregon commercial troll fishery from 1942 to 1962 against indices of offshore upwelling the previous spring and measurements of streamflow from five Oregon coastal rivers during the freshwater rearing phase. A highly significant positive relation was found between total streamflows during the freshwater residency of the fish for the five rivers combined and the weight of the annual catch of coho salmon from 1942 to 1962. There was also a significant positive relation between total combined annual (January–December) flows for these rivers and the catch 2 yr later. Conversely, I found no significant relation between the 60 consecutive days of lowest flow during summer and catch 2 yr later. High flows during freshwater rearing probably provide more habitat and better conditions for growth and survival. I also found a significant positive relation between April through June upwelling at two stations and catch of coho salmon the following year from 1947 to 1962. Fifty-six percent of the variation in catch from 1947 to 1962 was explained by the total flows during freshwater residency, 60 consecutive days of lowest flow, plus combined April through June upwelling at both stations. It is suggested that some stocks of coho salmon smolts may move southward or remain in local offshore waters after they enter the ocean to take advantage of the production of invertebrates resulting from upwelling.Key words: streamflow, upwelling, coho salmon, Oregon coast

scholarly journals Phenology of hatching, emergence, and end-of-season body size in young-of-year coho salmon in thermally contrasting streams draining the Copper River Delta, Alaska

2019 ◽  
Vol 76 (2) ◽  
pp. 185-191 ◽  
Author(s):  
Emily Y. Campbell ◽  
Jason B. Dunham ◽  
Gordon H. Reeves ◽  
Steve M. Wondzell
Keyword(s):  
Body Size ◽  
Environmental Variability ◽  
Coho Salmon ◽  
Growing Season ◽  
Early Life History ◽  
Growth And Survival ◽  
Individual Fitness ◽  
Marked Variability ◽  
Thermal Regimes ◽  
Body Sizes

Phenology can be linked to individual fitness, particularly in strongly seasonal environments where the timing of events has important consequences for growth, condition, and survival. We studied the phenology of coho salmon (Oncorhynchus kisutch) hatching and emergence in streams with contrasting thermal variability but in close geographic proximity. Following emergence, we tracked body sizes of cohorts of young-of-year fish until the end of the growing season. Hatch and emergence occurred at the same time among streams with marked variability in thermal regimes. We demonstrate that this can be explained in part by the thermal units accumulated during embryo development. At the end of the first growing season, there were some differences in body size, but overall fish size was similar among streams despite strong differences in thermal regimes. Collectively, these results provide novel insights into the interactions between environmental variability and the early life-history stages of coho salmon, furthering our understanding of the consequences of phenology on growth and survival for individuals within the critical first summer of life.

Factors Affecting Migration Timing, Growth, and Survival of Juvenile Coho Salmon in Two Coastal Washington Watersheds

2012 ◽  
Vol 141 (4) ◽  
pp. 890-906 ◽  
Author(s):  
Philip Roni ◽  
Todd Bennett ◽  
Ranae Holland ◽  
George Pess ◽  
Karrie Hanson ◽  
...  
Keyword(s):  
Coho Salmon ◽  
Growth And Survival ◽  
Factors Affecting ◽  
Migration Timing

An evaluation of the Clearwater River supplementation program in western Washington

2006 ◽  
Vol 63 (2) ◽  
pp. 423-437 ◽  
Author(s):  
Rishi Sharma ◽  
Gary Morishima ◽  
Shizhen Wang ◽  
André Talbot ◽  
Larry Gilbertson
Keyword(s):  
Coho Salmon ◽  
Reproductive Efficiency ◽  
Natural Environments ◽  
Brood Stock ◽  
Natural Origin ◽  
High Productivity ◽  
Western Washington ◽  
Queets River ◽  
Research Questions ◽  
Clearwater River

This paper presents preliminary results of a study to evaluate the potential utility of supplementation of natural origin coho salmon (Oncorhynchus kisutch) on the Clearwater River, a tributary of the Queets River in western Washington. The study, initiated in 1984, involves the collection of natural origin brood stock, rearing in a combination of hatchery and natural environments, and volitional releases, combined with marking and sampling of natural origin fish. Primary findings relative to five essential research questions of this study concluded that (i) smolts from supplementation returned at a lower rate than natural smolts; (ii) the reproductive efficiency (spawner to spawner) of fish taken for supplementation was higher than that for fish allowed to spawn naturally; (iii) supplemental fish successfully reproduced and the combined supplemental–natural spawning population had a high productivity; (iv) supplementation did not appear to have affected the overall reproductive performance of the population for the duration of the project; and (v) supplementation increased the overall spawner return on the Clearwater River and is required to maximize adult production, unless conditions in both freshwater and ocean environments are optimal.

Effect of triploidy on growth and survival of pre-smolt and post-smolt coho salmon (Oncorhynchus kisutch)

Aquaculture ◽  
1998 ◽  
Vol 168 (1-4) ◽  
pp. 413-422 ◽  
Author(s):  
Ruth E Withler ◽  
W.Craig Clarke ◽  
John Blackburn ◽  
Ian Baker
Keyword(s):  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Growth And Survival

Empirical relationships between watershed characteristics and coho salmon (Oncorhynchus kisutch) smolt abundance in 14 western Washington streams

2001 ◽  
Vol 58 (7) ◽  
pp. 1453-1463 ◽  
Author(s):  
Rishi Sharma ◽  
Ray Hilborn
Keyword(s):  
Coho Salmon ◽  
Woody Debris ◽  
Oncorhynchus Kisutch ◽  
Empirical Relationships ◽  
Watershed Characteristics ◽  
Valley Slope ◽  
Two Measures ◽  
Western Washington ◽  
Lower Stream ◽  
Habitat Variables

We assembled data on coho salmon (Oncorhynchus kisutch) from 14 streams in western Washington, including annual smolt counts and annual escapement, either as absolute counts or as an index. We also compiled data on large woody debris (number·km%#150;1 of stream), road densities in the watersheds (km road·km%#150;2), gradient of the streams (%), valley slope adjacent to the stream (%), drainage area in the watershed (km2), and pool, pond, and lake areas (m2·km%#150;1). We explored the relationships between habitat variables and two measures of coho production, the maximum production of smolts in the stream (capacity) and the maximum smolts/spawner (productivity). Using the 11 streams with pool and pond counts, we found that pool and pond densities served as good predictors of smolt density (r2 = 0.85 for pools and 0.68 for ponds, independently). Pools produced 0.39 smolts·m%#150;2 and ponds produced 0.07 smolts·m%#150;2 in the multiple regression fit, accounting for 92% of the residual error. We also found that lower valley slopes, lower road densities, and lower stream gradients were correlated with higher smolt density.

scholarly journals Pesticides in urban streams and early life stages of pacific coho salmon

2013 ◽  
Vol 32 (4) ◽  
pp. 920-931 ◽  
Author(s):  
Kerensa A. King ◽  
Christian E. Grue ◽  
James M. Grassley ◽  
Robert J. Fisk
Keyword(s):  
Early Life ◽  
Coho Salmon ◽  
Urban Streams ◽  
Life Stages ◽  
Early Life Stages

scholarly journals Landscape Ecotoxicology of Coho Salmon Spawner Mortality in Urban Streams

PLoS ONE ◽  
2011 ◽  
Vol 6 (8) ◽  
pp. e23424 ◽  
Author(s):  
Blake E. Feist ◽  
Eric R. Buhle ◽  
Paul Arnold ◽  
Jay W. Davis ◽  
Nathaniel L. Scholz
Keyword(s):  
Coho Salmon ◽  
Urban Streams

Juvenile Coho Salmon Growth and Survival across Stream Network Seasonal Habitats

2006 ◽  
Vol 135 (6) ◽  
pp. 1681-1697 ◽  
Author(s):  
Joseph L. Ebersole ◽  
Parker J. Wigington ◽  
Joan P. Baker ◽  
Michael A. Cairns ◽  
M. Robbins Church ◽  
...  
Keyword(s):  
Coho Salmon ◽  
Stream Network ◽  
Growth And Survival ◽  
Seasonal Habitats
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