Nilsen, et al 2023

Question 1

What is the name of this study?

Answer 1

Atlantic salmon of wild hatchery origin have different migration patterns

Question 2

Who published this study?

Answer 2

Canadian Journal of Fisheries and Aquatic Species

Question 3

What is the citation for this study?

Answer 3

Nilsen et al 2023

Question 4

What has happened to salmon numbers since the 1980s?

Answer 4

Numbers have declined significantly

Question 5

What are issues with hatchery born salmon?

Answer 5

-Increased inbreeding
-Performance defects like heart issues
-Changes in temperament traits
-Differences in gene expression
-No homing skills
-predator naivety

Question 6

When did population collapse in the Vosso River system?

Answer 6

Late 1980s

Question 7

What are the main findings of this study?

Answer 7

-Differences in behaviour of hatchery fish
-They would enter a river and then go backwards several times

Question 8

What is the behaviour of wild salmon in comparison?

Answer 8

-Steady progress up river
-Followed by resting period (called holding phase)
-Then become active again and spawn