Feeds

Climate change threatens to SHRINK FISH AND CHIP SUPPERS

Teeny oxygen-starved cod will hit global food supplies

SANS - Survey on application security programs

Climate change could threaten the quintessential British meal, the venerable fish and chips, which will only be available in small portions or not at all if boffins are correct.

The scientists have warned that the body weight of fish, including North Sea haddock and cod, will drop if oceans warm up. The theory goes that warmer waters increases the metabolic rate in fish, which will increase the demand for oxygen. If there isn't enough oxygen to go around, then the fish body weight will drop, it is believed.

According to computer models, the maximum body weight for more than 600 species could shrink by 14 to 20 per cent between the years 2000 and 2050.

“We were surprised to see such a large decrease in fish size,” study lead author William Cheung, an assistant professor at the University of British Columbia Fisheries Centre, said.

“Marine fish are generally known to respond to climate change through changing distribution and seasonality. But the unexpectedly big effect that climate change could have on body size suggests that we may be missing a big piece of the puzzle of understanding climate change effects in the ocean.”

The researchers already know that the number of fish in the world's oceans is likely to decline with climate change, but the study shows that the ones that are left will still get smaller.

The fishes' growth is linked to their oxygen supply, an idea another UBC boffin, Daniel Pauly, first suggested thirty years ago. But this is the first time his idea has been applied to the global fish population.

“It’s a constant challenge for fish to get enough oxygen from water to grow, and the situation gets worse as fish get bigger,” Pauly, who also worked on this study, said.

“A warmer and less-oxygenated ocean, as predicted under climate change, would make it more difficult for bigger fish to get enough oxygen, which means they will stop growing sooner.”

The biggest effects of fish shrinking are likely to be seen in the tropics, but colder seas will also see the migration of those tropical fish as they warm, another factor impacting the size of fish in those waters.

The study was published in Nature Climate Change. ®

3 Big data security analytics techniques

More from The Register

next story
Most Americans doubt Big Bang, not too sure about evolution, climate change – survey
Science no match for religion, politics, business interests
KILLER SPONGES menacing California coastline
Surfers are safe, crustaceans less so
Discovery time for 200m WONDER MATERIALS shaved from 4 MILLENNIA... to 4 years
Alloy, Alloy: Boffins in speed-classification breakthrough
LOHAN and the amazing technicolor spaceplane
Our Vulture 2 livery is wrapped, and it's les noix du mutt
Liftoff! SpaceX Falcon 9 lifts Dragon on third resupply mission to ISS
SpaceX snaps smartly into one-second launch window
STEALTHY NANOROBOTS dress up as viruses, prepare to sneak into YOUR BODY
Cloaking techniques nicked from viruses tackle roadblocks on way to medical frontier
Opportunity selfie: Martian winds have given the spunky ol' rover a spring cleaning
Power levels up 70 per cent as the rover keeps on truckin'
prev story

Whitepapers

Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.