Stability in reproductive timing and habitat usage of Chinook salmon across six years of varying environmental conditions and abundance

2020 ◽  
Vol 27 (4) ◽  
pp. 399-416
Author(s):  
Matthew L. Peterson ◽  
Dana J. Lee ◽  
John Montgomery ◽  
Michael Hellmair ◽  
Andrea Fuller ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Environmental Conditions ◽  
Reproductive Timing ◽  
Habitat Usage

GrowChinook: an optimized multimodel and graphic user interface for predicting juvenile Chinook salmon growth in lentic ecosystems

2020 ◽  
Vol 77 (3) ◽  
pp. 564-575 ◽  
Author(s):  
Christina A. Murphy ◽  
Chee Sing Lee ◽  
Brent Johnson ◽  
Ivan Arismendi ◽  
Sherri L. Johnson
Keyword(s):  
Vertical Migration ◽  
Chinook Salmon ◽  
Environmental Conditions ◽  
Prey Availability ◽  
Juvenile Fish ◽  
Growth Potential ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook ◽  
Empirical Size ◽  
Bioenergetics Models

Linked foraging and bioenergetics models allow for increased understanding of fish growth potential and behavior by incorporating prey availability coupled to environmental conditions including temperature and prey visibility. To inform our understanding of growth and vertical migration patterns of Chinook salmon (Oncorhynchus tshawytscha) inhabiting lentic ecosystems, we linked foraging and bioenergetics models to create GrowChinook ( http://growchinook.fw.oregonstate.edu/ ). This multimodel design and optimization routine has broad applications in examining growth potential and predicting habitat use in stratified environments. We demonstrate the use of GrowChinook for the spring–summer rearing period in three Willamette River basin reservoirs, Oregon, USA. These reservoirs support juvenile spring Chinook salmon that exhibit a novel reservoir-reared life history that includes larger juvenile fish compared with nearby stream-reared subyearlings. Model outputs of predicted growth and depth use patterns based on observed prey distributions and environmental conditions were corroborated by observed empirical size and growth data from other years. Our simulations support diel vertical migration as a tactic that increases growth potential and contribute to understanding juvenile Chinook salmon growth in stratified systems.

scholarly journals Environmental conditions impacting juvenile Chinook salmon growth off central California: An ecosystem model analysis

2015 ◽  
Vol 42 (8) ◽  
pp. 2910-2917 ◽  
Author(s):  
J. Fiechter ◽  
D. D. Huff ◽  
B. T. Martin ◽  
D. W. Jackson ◽  
C. A. Edwards ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Environmental Conditions ◽  
Ecosystem Model ◽  
Model Analysis ◽  
Central California ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook

Effects of Environmental Conditions during Stream, Estuary, and Ocean Residency on Chinook Salmon Return Rates in the Skagit River, Washington

2005 ◽  
Vol 134 (6) ◽  
pp. 1562-1581 ◽  
Author(s):  
Correigh M. Greene ◽  
David W. Jensen ◽  
George R. Pess ◽  
E. Ashley Steel ◽  
Eric Beamer
Keyword(s):  
Chinook Salmon ◽  
Environmental Conditions ◽  
Return Rates ◽  
Skagit River

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

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