Comparative migratory behavior and survival of wild and hatchery steelhead (Oncorhynchus mykiss) smolts in riverine, estuarine, and marine habitats of Puget Sound, Washington

2014 ◽  
Vol 98 (1) ◽  
pp. 357-375 ◽  
Author(s):  
Fred A. Goetz ◽  
Eric Jeanes ◽  
Megan E. Moore ◽  
Thomas P. Quinn
Keyword(s):  
Oncorhynchus Mykiss ◽  
Puget Sound ◽  
Migratory Behavior ◽  
Marine Habitats

scholarly journals Marine Habitat Recovery of Five Derelict Gear Removal Sites in Puget Sound

2018 ◽  
Author(s):  
Jeffrey June ◽  
Kyle Antonelis
Keyword(s):  
Puget Sound ◽  
Growing Season ◽  
Fishing Gear ◽  
Accumulation Rates ◽  
Marine Habitat ◽  
Habitat Monitoring ◽  
Habitat Recovery ◽  
Marine Habitats ◽  
Derelict Fishing Gear ◽  
Eelgrass Beds

Reports on the findings of a post-derelict net removal habitat monitoring project in Puget Sound. This study had three objectives. First was to document impacts ofderelict fishing gear on marine habitats. Second was to monitor the recovery of thesehabitats after derelict fishing gear was removed. Third was to monitor sites for newlylost fishing gear to determine re-accumulation rates at these sites. This study showed that marine habitat service functions are negatively affected by derelict fishing gear. It showed that natural ocean processes succeed in restoring these service functions within a single growing season after derelict fishing gear removal for areas dominated by kelp. Eelgrass beds take longer to recover, but can improve by 30% in less than a year.

Historical abundance of Puget Sound steelhead, Oncorhynchus mykiss, estimated from catch record data

2011 ◽  
Vol 68 (3) ◽  
pp. 498-510 ◽  
Author(s):  
N. Gayeski ◽  
B. McMillan ◽  
P. Trotter
Keyword(s):  
Oncorhynchus Mykiss ◽  
Puget Sound ◽  
Total Abundance ◽  
Commercial Catch ◽  
Freshwater Habitat ◽  
Abundance Estimates ◽  
Rivers And Streams ◽  
Average Abundance ◽  
Record Data ◽  
Unreported Catches

We used reported commercial catch data and historical information regarding unreported catches to estimate the abundance of winter steelhead, Oncorhynchus mykiss , in Puget Sound rivers in 1895, the year in which the peak commercial catch of steelhead occurred. We employed a Bayesian analysis to address the uncertainties associated with the estimation process and report abundance estimates for four large northern Puget Sound rivers and for the remaining aggregate of rivers and streams in Puget Sound. The central 90% of the posterior distribution of total abundance ranged from 485 000 to 930 000, with a mode of 622 000. Compared with the 25-year average abundance for all of Puget Sound of 22 000 for the 1980–2004 period, our results show that current abundance is likely only 1%–4% of what it was prior to the turn of the 20th century. Loss of freshwater habitat alone can account for this reduction in abundance only if there was an extraordinary decline in productivity. Our estimates of historical abundance should better inform the development of recovery goals for Puget Sound steelhead.

Variable prey consumption leads to distinct regional differences in Chinook salmon growth during the early marine critical period

2020 ◽  
Vol 640 ◽  
pp. 147-169
Author(s):  
MJ Davis ◽  
JW Chamberlin ◽  
JR Gardner ◽  
KA Connelly ◽  
MM Gamble ◽  
...  
Keyword(s):  
Growth Rates ◽  
Chinook Salmon ◽  
Critical Period ◽  
Pacific Salmon ◽  
Puget Sound ◽  
Foraging Strategies ◽  
Forage Fish ◽  
San Juan ◽  
San Juan Islands ◽  
Marine Habitats

Growth during the early marine critical period is positively associated with survival and recruitment for Pacific salmon Oncorhynchus spp., so it is important to understand how certain foraging strategies may bolster growth in estuarine and marine environments. To elucidate how spatiotemporal and demographic differences in diet contribute to growth rate variability, we analyzed stomach contents in tandem with morphometric and hormonal indices of growth for subyearling Chinook salmon O. tshawytscha captured in Puget Sound, Washington, USA. Regional dietary patterns indicated that fish caught in northern Puget Sound ate insects in the estuarine and nearshore habitats, followed by decapod larvae, euphausiids, or forage fish in the offshore zone. In southern Puget Sound, fish ate insects in the estuary but were more likely to eat mysids and other crustaceans in the nearshore zone. In the marine habitats adjacent to the San Juan Islands, subyearlings ate forage fish, and their stomachs were as much as 1.4 to 3 times fuller than salmon captured in other regions. Scale-derived growth rates and insulin-like growth factor-1 levels showed distinct growth advantages for San Juan Islands fish which were strongly associated with the early adoption of piscivory. However, consumption of larger crustaceans such as mysids and euphausiids was also associated with greater relative growth regardless of where individuals were captured. These findings highlight how spatiotemporal differences in prey quantity, prey profitability, and individual foraging strategies result in variable growth rates among salmon populations. Specifically, they emphasize the role of piscivory in promoting early marine growth for out-migrating Chinook salmon.

Population-specific aggregations of steelhead trout (Oncorhynchus mykiss) in the North Pacific Ocean

1997 ◽  
Vol 54 (10) ◽  
pp. 2368-2376 ◽  
Author(s):  
S McKinnell ◽  
J J Pella ◽  
M L Dahlberg
Keyword(s):  
Pacific Ocean ◽  
Oncorhynchus Mykiss ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Puget Sound ◽  
Steelhead Trout ◽  
The North ◽  
Georgia Basin ◽  
The North Pacific ◽  
High Seas

The distribution of North American hatchery-origin steelhead (Oncorhynchus mykiss) in the North Pacific Ocean varied by age and hatchery location. Columbia River steelhead were more abundant south of the Aleutian Islands at an earlier age than steelhead from the Georgia Basin (Georgia Strait, Puget Sound, and waters connecting with the open Pacific). Between 1984 and 1989, there were eight independent and coincident recoveries of coded-wire-tagged steelhead, where individuals released from hatcheries as juveniles at similar times and locations were recovered together on the high seas up to 3 years later. A statistical test was developed to determine whether these coincident recoveries should be expected if individual steelhead within populations travelled in the North Pacific in an uncoordinated manner. The overall test suggested that some tagged steelhead populations travelled together in a significantly (P < 0.05) coordinated manner on the high seas.

Declining patterns of Pacific Northwest steelhead trout (Oncorhynchus mykiss) adult abundance and smolt survival in the ocean

2017 ◽  
Vol 74 (8) ◽  
pp. 1275-1290 ◽  
Author(s):  
Neala W. Kendall ◽  
Gary W. Marston ◽  
Matthew M. Klungle
Keyword(s):  
British Columbia ◽  
Time Series ◽  
Oncorhynchus Mykiss ◽  
Pacific Northwest ◽  
State Space Model ◽  
Puget Sound ◽  
Survival Rates ◽  
Steelhead Trout ◽  
Factors Affecting ◽  
Adult Abundance

Examination of population abundance and survival trends over space and time can guide management and conservation actions with information about the spatial and temporal scale of factors affecting them. Here, we analyzed steelhead trout (anadromous Oncorhynchus mykiss) adult abundance time series from 35 coastal British Columbia and Washington populations along with smolt-to-adult return (smolt survival) time series from 48 populations from Washington, Oregon, and the Keogh River in British Columbia. Over 80% of the populations have declined in abundance since 1980. A multivariate autoregressive state-space model revealed smolt survival four groupings: Washington and Oregon coast, lower Columbia River, Strait of Juan de Fuca, and Puget Sound – Keogh River populations. Declines in smolt survival rates were seen for three of the four groupings. Puget Sound and Keogh River populations have experienced low rates since the early 1990s. Correlations between population pairs’ time series and distance apart illustrated that smolt survival rates were more positively correlated for proximate populations, suggesting that important processes, including those related to ocean survival, occur early in the marine life of steelhead.

Sign in / Sign up

Export Citation Format

Share Document