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Title: Fish shrinking due to global warming
Source:
BigPondNews.com
URL Source: http://bigpondnews.com/articles/Env ... _to_global_warming_354359.html
Published: Jul 21, 2009
Author: BPN staff
Post Date: 2009-07-20 23:16:04 by buckeroo
Keywords: None
Views: 151
Comments: 14
Tuesday, July 21, 2009 » 09:16am Fish have lost half their average body mass and smaller species are making up a larger proportion of European fish stocks as a result of global warming. 'It's huge,' said study author Martin Daufresne of the Cemagref Public Agricultural and Environmental Research Institute in Lyon, France. 'Size is a fundamental characteristic that is linked to a number of biological functions, such as fecundity - the capacity to reproduce.' Smaller fish tend to produce fewer eggs. They also provide less sustenance for predators - including humans - which could have significant implications for the food chain and ecosystem. A similar shrinking effect was recently documented in Scottish sheep and Daufresne said it is possible that global warming could have 'a significant impact on organisms in general.' Earlier research has already established that fish have shifted their geographic ranges and their migratory and breeding patters in response to rising water temperatures. It has also been established that warmer regions tend to be inhabited by smaller fish. Daufresne and his colleagues examined long-term surveys of fish populations in rivers, streams and the Baltic and North Seas and also performed experiments on bacteria and plankton. They found the individual species lost an average of 50 per cent of their body mass over the past 20 to 30 years while the average size of the overall fishing stock had shrunk by 60 per cent. This was a result of a decrease in the average size-at-age and an increase in the proportion of juveniles and small-sized species, Daufresne said. 'It was an effect that we observed in a number of organisms and in a number of very different environments - on fish, on plankton, on bacteria, in fresh water, in salt water - and we observed a global shrinking of size for all the organisms in all the environments,' Daufresne said in a telephone interview. While commercial and recreational fishing did impact some of the fisheries studied, it 'cannot be considered as the unique trigger' for the changes in size, the study published in the Proceedings of the National Academy of Sciences found. 'Although not negating the role of other factors, our study provides strong evidence that temperature actually plays a major role in driving changes in the size structure of populations and communities,' the study concluded.
Poster Comment: I guess the world's average global climate temperature is heating up after-all.
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#1. To: buckeroo, *Agriculture-Environment* (#0)
And the sun doesn't drive our climate either. LOL. Gotta love these studies.
Of course you are correct. Still, overall economic activity is driven by matters of price/demand yields. If fish are smaller in size, then the price of the same (yield for yield) shall go up. I guess what it all means is that we can't enjoy a night out on the town with an inexpensive fish dinner. We will probably have to enjoy a Der Wiener-Schnitzel Hot Dawg for about five bucks. Yuck!
I was going to suggest a nice steak, one that stands up and moos at me.
www.surfacestations.org/odd_ sites.htmWhile commercial and recreational fishing did impact some of the fisheries studied, it 'cannot be considered as the unique trigger' for the changes in size, the study published in the Proceedings of the National Academy of Sciences found.
Mirrors on the ceiling, The pink champagne on ice, And she said 'We are all just prisoners here, of our own device', And in the master's chambers, They gathered for the feast, They stab it with their steely knives, But they just can't kill the beast - Hotel California, The Eagles
#2. To: farmfriend (#1)
#3. To: buckeroo (#2)
We will probably have to enjoy a Der Wiener-Schnitzel Hot Dawg for about five bucks. Yuck!
Mirrors on the ceiling, The pink champagne on ice, And she said 'We are all just prisoners here, of our own device', And in the master's chambers, They gathered for the feast, They stab it with their steely knives, But they just can't kill the beast - Hotel California, The Eagles
#4. To: buckeroo, farmfriend, christine (#2)
I think we should play a joke on these whack jobs. The above URL is to a site that has photos of offiical reporting stations where college professors on the payroll of the Bilderberg Society Foundations have placed thermometers next to Weber grills and to HVAC vents. What we do is to invite our friends over to a barbecue, move the thermometer a little closer to the grill and fire up the Weber. Then we issue a press release saying that UC Davis (or fill in the name of a local university) is experiencing total eco collapse due to Global Warming. It is 150 degrees and too late to cut Carbon Dioxide emissions to save the planet. We are all doomed and only have a few hours left before we die. Maybe it would make a great YouTube video.
The Truth of 911 Shall Set You Free From The Lie
#5. To: buckeroo (#0)
If fish are smaller it is because of overfishing; they are caught before they have time to grow larger.
#6. To: buckeroo (#0)
Global warming and not the human population pushing 7 billion, eh?
Fish have lost half their average body mass and smaller species are making up a larger proportion of European fish stocks as a result of global warming.
#7. To: Horse, buckeroo, christine (#4)
I know some of the people who did the surveys on those sites. Had to laugh at one of their pictures. It was a site that hadn't had a temp report in years. The station was surrounded by pot plants. Wonder why they forgot to file their reports?
Mirrors on the ceiling, The pink champagne on ice, And she said 'We are all just prisoners here, of our own device', And in the master's chambers, They gathered for the feast, They stab it with their steely knives, But they just can't kill the beast - Hotel California, The Eagles
#8. To: abraxas (#6)
I would say BOTH definitive inputs to the issues we see today have the same or similar ramifications. The bottom line or common denominator: natural resources are becoming more and more scarcer increasing costs for everyone while inviting government management to additionally tax the already stressed system.
Global warming and not the human population pushing 7 billion, eh?
#9. To: buckeroo (#8)
Grace, Grace, Grace. :spit:
LOL
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen.”—Samuel Adams 
#10. To: buckeroo (#0)
B.S. Just look at these recent record Texas catches:
_________________________________________________________________________
"This man is Jesus,” shouted one man, spilling his Guinness as Barack Obama began his inaugural address. “When will he come to Kenya to save us?”
-Schweizerische Schuetzenzeitung (Swiss Shooting Federation) April, 1941
#11. To: Rotara (#9)
Easy to trash a thread, isn't it? Didn't your momma raise you with no manners?
Grace, Grace, Grace. :spit:
#12. To: X-15 (#10)
I am glad you brought up proud and individual fishermen, capable of prodding or paddling or sitting on a pontoon in a public lake based upon federal, state, county and local standards of conduct. I wonder if they use strawberries on their lures? Still, your post doesn't address the large world around us. It isn't measured by a few proud fisherman that have caught a single fish; it is measured by the diminushing characteristics of feeding the world with a few smaller fish. And no, Jesus ain't going to save us.
Just look at these recent record Texas catches:
#13. To: buckeroo (#12)
Fish have lost half their average body mass and smaller species are making up a larger proportion of European fish stocks as a result of global warming. Sounds like overfishing to me, global warming be damned. Besides, maybe the world SHOULD be warmer. Maybe we're still coming out of the last ice age and the state of the world should be as it was when dinosaurs roamed it (hot, humid).
_________________________________________________________________________
"This man is Jesus,” shouted one man, spilling his Guinness as Barack Obama began his inaugural address. “When will he come to Kenya to save us?”
-Schweizerische Schuetzenzeitung (Swiss Shooting Federation) April, 1941
#14. To: buckeroo (#11)
Buckeroo = Grace = Trash. So I trash your trash ??? I should get a cookie or something.
Easy to trash a thread, isn't it?
"If you love wealth more than liberty, the tranquility of servitude better than the animating contest of freedom, depart from us in peace. We ask not your counsel nor your arms. Crouch down and lick the hand that feeds you. May your chains rest lightly upon you and may posterity forget that you were our countrymen.”—Samuel Adams
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