Hatcheries Change Salmon Genetics After a Single Generation

The accumulation of small heritable changes within populations over time.

Moderators: Calilasseia, amok, ADParker

Hatcheries Change Salmon Genetics After a Single Generation

#1  Postby Paul G » Jan 10, 2012 6:55 pm

http://www.sciencedaily.com/releases/20 ... 152508.htm

The impact of hatcheries on salmonids is so profound that in just one generation traits are selected that allow fish to survive and prosper in the hatchery environment, at the cost of their ability to thrive and reproduce in a wild environment.
User avatar
Paul G
THREAD STARTER
 
Name: Beef Joint
Posts: 9836
Age: 31
Male

England (eng)
Print view this post

Ads by Google


Re: Hatcheries Change Salmon Genetics After a Single Generation

#2  Postby natselrox » Jan 10, 2012 7:00 pm

Paul G wrote:
The impact of hatcheries on salmonids is so profound that in just one generation traits are selected that allow fish to survive and prosper in the hatchery environment, at the cost of their ability to thrive and reproduce in a wild environment.


That statement seems to be straight out of Capt. Obvious' Manual! :lol:

Couldn't resist!
When in perplexity, read on.

"A system that values obedience over curiosity isn’t education and it definitely isn’t science"
User avatar
natselrox
 
Posts: 10034
Age: 102
Male

India (in)
Print view this post

Re: Hatcheries Change Salmon Genetics After a Single Generation

#3  Postby Paul G » Jan 10, 2012 7:04 pm

Why is it?
User avatar
Paul G
THREAD STARTER
 
Name: Beef Joint
Posts: 9836
Age: 31
Male

England (eng)
Print view this post

Re: Hatcheries Change Salmon Genetics After a Single Generation

#4  Postby natselrox » Jan 10, 2012 7:32 pm

I think that's what environments are supposed to do, ain't it? Try replacing 'hatcheries' with 'New York City' and salmonids with humans...

The impact of New York City on humans is so profound that in just one generation traits are selected that allow humans to survive and prosper in the city environment, at the cost of their ability to thrive and reproduce in another environment.


There is no way to increase the amount of mutation, so I guess the statement is equally valid for any environment and for any species.
When in perplexity, read on.

"A system that values obedience over curiosity isn’t education and it definitely isn’t science"
User avatar
natselrox
 
Posts: 10034
Age: 102
Male

India (in)
Print view this post

Re: Hatcheries Change Salmon Genetics After a Single Generation

#5  Postby Paul G » Jan 10, 2012 11:16 pm

The important part is "in one generation".
User avatar
Paul G
THREAD STARTER
 
Name: Beef Joint
Posts: 9836
Age: 31
Male

England (eng)
Print view this post

Re: Hatcheries Change Salmon Genetics After a Single Generation

#6  Postby trubble76 » Jan 10, 2012 11:27 pm

Yes, I don't think we are talking about behavioural adaptions, genetic change occurring so quickly is staggering. I suppose that it is domestication, but much quicker than I thought possible.
Freedom's just another word for nothin' left to lose,
And nothin' ain't worth nothin' but it's free.

"Suck me off and I'll turn the voltage down"
User avatar
trubble76
RS Donator
 
Posts: 10931
Age: 37
Male

United Kingdom (uk)
Print view this post

Re: Hatcheries Change Salmon Genetics After a Single Generation

#7  Postby Spearthrower » Jan 11, 2012 2:12 am

Well, the need to swim hundreds of miles, throw yourself up a river, spawn then die is rather... costly, all things considered.
I'm not an atheist; I just don't believe in gods.
Religion: Mass Stockholm Syndrome

Learn Stuff. Stuff good. https://www.coursera.org/
User avatar
Spearthrower
 
Posts: 17301
Age: 38
Male

Country: Thailand
Print view this post

Ads by Google


Re: Hatcheries Change Salmon Genetics After a Single Generation

#8  Postby natselrox » Jan 11, 2012 4:22 am

trubble76 wrote:Yes, I don't think we are talking about behavioural adaptions, genetic change occurring so quickly is staggering. I suppose that it is domestication, but much quicker than I thought possible.


Genetic change is occurring at the same speed as in any other place/time (roughly). It is the drastic change in environment that is causing the bottleneck effect of sorts.

Paul G wrote:The important part is "in one generation".


Unless you quantify the amount of traits selected, that means nothing. In every species, and in every generation, traits are selected that help them to thrive in the environment.

I think the rest of the article does a good job at explaining the whole thing, just that the first sentence sounds a bit "meh".
When in perplexity, read on.

"A system that values obedience over curiosity isn’t education and it definitely isn’t science"
User avatar
natselrox
 
Posts: 10034
Age: 102
Male

India (in)
Print view this post


Return to Evolution & Natural Selection

Who is online

Users viewing this topic: No registered users and 1 guest