The effects of purified alcohol extracts from soy products on feed intake and growth of chinook salmon (Oncorhynchus tshawytscha) and rainbow trout (Oncorhynchus mykiss)

Aquaculture ◽  
1998 ◽  
Vol 161 (1-4) ◽  
pp. 27-43 ◽  
Author(s):  
Dominique P Bureau ◽  
Andrew M Harris ◽  
C Young Cho
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Feed Intake ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Rainbow Trout Oncorhynchus Mykiss

The effects of domestication on the relative vulnerability of hatchery and wild origin spring Chinook salmon (Oncorhynchus tshawytscha) to predation

2007 ◽  
Vol 64 (5) ◽  
pp. 813-818 ◽  
Author(s):  
Anthony L Fritts ◽  
Jennifer L Scott ◽  
Todd N Pearsons
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Chinook Salmon ◽  
First Generation ◽  
Oncorhynchus Tshawytscha ◽  
State Of The Art ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Salmon Fry ◽  
History Of ◽  
Relative Vulnerability

We tested whether one generation of state-of-the-art hatchery culture influenced the vulnerability of Chinook salmon (Oncorhynchus tshawytscha) fry to predators. Size-matched hatchery and wild origin spring Chinook salmon fry were exposed to rainbow trout (Oncorhynchus mykiss) and torrent sculpin (Cottus rhotheus) predators in 10.8 m3 net pens. The hatchery origin fry were the offspring of first generation hatchery-reared broodstock, and the wild origin fry had no history of hatchery culture; both originated from the same stock. Wild origin fry were found to have a 2.2% (p = 0.016) survival advantage over hatchery origin fry during 2 years of predation challenges. The most important findings of this study are (i) domestication can affect the susceptibility to predators after only one generation of state-of-the-art hatchery culture practices, and (ii) the domestication effect was very small.

Sign in / Sign up

Export Citation Format

Share Document