Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription profiles among and within eight population crosses from British Columbia, Canada

2019 ◽  
Vol 28 (8) ◽  
pp. 1890-1903
Author(s):  
Shelby D. Toews ◽  
Kyle W. Wellband ◽  
Brian Dixon ◽  
Daniel D. Heath
Keyword(s):  
British Columbia ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Juvenile Chinook Salmon ◽  
Transcription Profiles ◽  
Juvenile Chinook

A Record of Pacific Herring (Clupea harengus pallasi) Feeding on Juvenile Chinook Salmon (Oncorhynchus tshawytscha) in a British Columbia Estuary

1971 ◽  
Vol 28 (12) ◽  
pp. 1921-1921 ◽  
Author(s):  
Jun Ito ◽  
R. R. Parker
Keyword(s):  
British Columbia ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Clupea Harengus ◽  
Pacific Herring ◽  
Predator Prey ◽  
Juvenile Chinook Salmon ◽  
Clupea Harengus Pallasi ◽  
Juvenile Chinook

An occurrence of Pacific herring (Clupea harengus pallasi) predation on juvenile chinook salmon (Oncorhynchus tshawytscha) is described. This is the first recorded incidence of this particular predator–prey relation.

Assessment of the Impact of the Myxosporean Parasite Ceratomyxa shasta on Survival of Seaward Migrating Juvenile Chinook Salmon, Oncorhynchus tshawytscha, from the Fraser River, British Columbia

1992 ◽  
Vol 49 (9) ◽  
pp. 1883-1889 ◽  
Author(s):  
L. Margolis ◽  
T. E. McDonald ◽  
D. J. Whitaker
Keyword(s):  
British Columbia ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Infected Fish ◽  
Migration Route ◽  
Fraser River ◽  
Juvenile Chinook Salmon ◽  
Myxosporean Parasite ◽  
Juvenile Chinook ◽  
The Impact

Approximately 3.3% of more than 3500 seaward migrating juvenile chinook salmon (Oncorhynchus tshawytscha) collected from the lower reaches and off the mouth of the Fraser River, British Columbia, between March and August 1985–87 were infected with Ceratomyxa shasta (Protozoa: Myxosporea). The fish were held live for up to 151 d before examination to allow the infections to become patent. The first infected fish were detected in samples taken in late May to early June, approximately 4 wk after the river water temperature had reached 10 °C. By this time, 40–65% of the fish had been collected, indicating that the majority of the juvenile chinook salmon had left the Fraser River before the infective stage of the parasite was present. Significant differences in prevalence of C. shasta were associated with both the migration route chosen by the fish and their age. Fish that used the lower flow rate North Arm had a greater prevalence (6.8%) of infection than those that migrated down the Main Arm (2.1%). Age 0 fish had a significantly higher prevalence (5.2%) of C. shasta than the age 1 group (1.5%). It is concluded that C. shasta is not a major cause of mortality of downstream migrating juvenile Fraser River chinook salmon.

scholarly journals Managed Wetlands Can Benefit Juvenile Chinook Salmon in a Tidal Marsh

2021 ◽  
Author(s):  
Nicole M. Aha ◽  
Peter B. Moyle ◽  
Nann A. Fangue ◽  
Andrew L. Rypel ◽  
John R. Durand
Keyword(s):  
San Francisco ◽  
Growth Rates ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Nursery Habitat ◽  
San Francisco Estuary ◽  
Rice Fields ◽  
Fish Growth ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook

AbstractLoss of estuarine and coastal habitats worldwide has reduced nursery habitat and function for diverse fishes, including juvenile Chinook salmon (Oncorhynchus tshawytscha). Underutilized off-channel habitats such as flooded rice fields and managed ponds present opportunities for improving rearing conditions and increasing habitat diversity along migratory corridors. While experiments in rice fields have shown enhanced growth rates of juvenile fishes, managed ponds are less studied. To evaluate the potential of these ponds as a nursery habitat, juvenile Chinook salmon (~ 2.8 g, 63 mm FL) were reared in cages in four contrasting locations within Suisun Marsh, a large wetland in the San Francisco Estuary. The locations included a natural tidal slough, a leveed tidal slough, and the inlet and outlet of a tidally muted managed pond established for waterfowl hunting. Fish growth rates differed significantly among locations, with the fastest growth occurring near the outlet in the managed pond. High zooplankton biomass at the managed pond outlet was the best correlate of salmon growth. Water temperatures in the managed pond were also cooler and less variable compared to sloughs, reducing thermal stress. The stress of low dissolved oxygen concentrations within the managed pond was likely mediated by high concentrations of zooplankton and favorable temperatures. Our findings suggest that muted tidal habitats in the San Francisco Estuary and elsewhere could be managed to promote growth and survival of juvenile salmon and other native fishes.

Alteration of thyroid hormone concentrations in juvenile Chinook salmon (Oncorhynchus tshawytscha) exposed to polybrominated diphenyl ethers, BDE-47 and BDE-99

Chemosphere ◽  
2017 ◽  
Vol 171 ◽  
pp. 1-8 ◽  
Author(s):  
Mary R. Arkoosh ◽  
Ahna L. Van Gaest ◽  
Stacy A. Strickland ◽  
Greg P. Hutchinson ◽  
Alex B. Krupkin ◽  
...  
Keyword(s):  
Thyroid Hormone ◽  
Chinook Salmon ◽  
Polybrominated Diphenyl Ethers ◽  
Oncorhynchus Tshawytscha ◽  
Juvenile Chinook Salmon ◽  
Diphenyl Ethers ◽  
Juvenile Chinook

Predator avoidance ability of juvenile chinook salmon (Oncorhynchus tshawytscha) subjected to sublethal exposures of gas-supersaturated water

1997 ◽  
Vol 54 (4) ◽  
pp. 757-764 ◽  
Author(s):  
M G Mesa ◽  
J J Warren
Keyword(s):  
Chinook Salmon ◽  
Predator Avoidance ◽  
Oncorhynchus Tshawytscha ◽  
Control Fish ◽  
Dissolved Gas ◽  
Juvenile Chinook Salmon ◽  
Unexposed Control ◽  
Lateral Lines ◽  
Gill Filaments ◽  
Juvenile Chinook

To assess the effects of gas bubble trauma (GBT) on the predator avoidance ability of juvenile chinook salmon (Oncorhynchus tshawytscha), we created groups of fish that differed in prevalence and severity of gas emboli in their lateral lines, fins, and gills by exposing them to 112% total dissolved gas (TDG) for 13 days, 120% TDG for 8 h, or 130% TDG for 3.5 h. We subjected exposed and unexposed control fish simultaneously to predation by northern squawfish (Ptychocheilus oregonensis) in water of normal gas saturation in 6, 18, and 10 tests using prey exposed to 112, 120, and 130% TDG, respectively. Only fish exposed to 130% TDG showed a significant increase in vulnerability to predation. The signs of GBT exhibited by fish sampled just prior to predator exposure were generally more severe in fish exposed to 130% TDG, which had the most extensive occlusion of the lateral line and gill filaments with gas emboli. Fish exposed to 112% TDG had the most severe signs of GBT in the fins. Our results suggest that fish showing GBT signs similar to those of our fish exposed to 130% TDG, regardless of their precise exposure history, may be more vulnerable to predation.

scholarly journals Rearing and migration of juvenile Chinook salmon (Oncorhynchus tshawytscha) in a large river floodplain

2017 ◽  
Vol 100 (9) ◽  
pp. 1105-1120 ◽  
Author(s):  
Lynn Takata ◽  
Ted R. Sommer ◽  
J. Louise Conrad ◽  
Brian M. Schreier
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Large River ◽  
River Floodplain ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook ◽  
And Migration
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