HOME >> BIOLOGY >> NEWS
Scientists discover global pattern of big fish diversity in open oceans

ocean off Northwest Australia, for example, was once the world's most diverse area for species of tuna and billfish and an important tuna spawning ground. Now it is indistinguishable from the rest of the ocean.

The loss of diversity means that where fishermen might have once caught 10 different species in an area on average, now they catch only five. "It's not yet extinction; it's local fishing out of species," says Myers. "Where you once had a range of a species in dense numbers, now you might catch one or two of a certain species."

While other studies have looked at local or regional populations of fish over time, it has been difficult to discern the underlying cause of decreases or increases of catch. This study is the first to step back to examine climate impacts and fishing in unison at a global scale. It shows that environmental changes affect fish populations year-to-year, but overfishing is the primary driver of long-term declines in the variety of big fish.

"This study brings to the surface something that was buried," says Daniel Pauly, a fisheries biologist from the University of British Columbia Fisheries Centre. "The long-term trend of decline is not discernable at first because there are lots of things happening like the short-term effects of El Nino."

"We know there are decadal patterns in climate and ocean ecosystems," adds Nathan Mantua of the University of Washington's Climate Impact Group. "If this were the only factor, we might expect declines to be quickly reversible. What they've shown here is that we're on a curvy one-way street, with clear trends towards a reduction in biodiversity. There is real cause for alarm here."

Scientists say losing the variety of fish does not bode well for the future health of open oceans. A robust portfolio of different species is a key to maintaining our supply of fish in the long term and the ability of these living resources to rebound from environmental changes.
'"/>

Contact: Jessica Brown
jbrown@seaweb.org
202-497-8375
SeaWeb
28-Jul-2005


Page: 1 2 3 4 5 6

Related biology news :

1. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
2. Scientists prove that disputed Korean stem cell line comes from an unfertilized egg and not cloning
3. Scientists move closer to bio-engineered bladders
4. Scientists find stem cell switch
5. Scientists discover new way to study nanostructures
6. Scientists a step closer to understanding how anaesthetics work in the brain
7. Scientists to make news at Computational Biology Conference
8. Accident-prone? Scientists link brain function to knee injuries
9. Scientists take next step in understanding potential target for ovarian cancer treatment
10. Scientists find brown fat master switch
11. Scientists identify 2 distinct Parkinsons networks

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Scientists discover global pattern big fish diversity open oceans

(Date:10/17/2014)... news release is available in German . ... only a very few drugs. When treating overdoses, doctors are ... is especially difficult if there is a combination of drugs ... playing and accidentally swallows his grandmother,s pills? ETH professor Jean-Christophe ... wanted to find an answer to this question. "The task ...
(Date:10/16/2014)... William and Mary,s Virginia Institute of Marine Science ... Environmental Protection Agency to identify the streams and ... develop tools to help local governments and citizens ... critically on a dataset of tidal-marsh observations first ... with this historical baseline can today,s researchers accurately ...
(Date:10/16/2014)... Melbourne researchers have challenged conventional thinking on how the ... new mechanism for how bowel cancer starts. , The ... maintaining and regenerating the ,crypts, that are a feature ... are involved in bowel cancer development, a controversial finding ... existence. , Using 3D imaging technologies, Dr Chin Wee ...
Breaking Biology News(10 mins):Emergency aid for overdoses 2Emergency aid for overdoses 3EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3Cryptic clues drive new theory of bowel cancer development 2
(Date:10/25/2014)... Angeles, California (PRWEB) October 23, 2014 ... ), a specialty pharmaceutical company devoted to bringing ... out-licensing partnerships in 2015. , ViaDerma has developed ... which allows for rapid mass transfer of pharmaceutical ... the body to provide immediate localized therapy. The ...
(Date:10/25/2014)... 24, 2014 This research report ... Starch Based Plastics, Regenerated Cellulose, PCL), by Application ... and Forecasts to 2019”, defines and segments the ... forecast of its global volume and value. , ... spread through 178 Slides and in-depth TOC on ...
(Date:10/25/2014)... Oramed Pharmaceuticals Inc. (NASDAQCM: ORMP) ... the development of oral drug delivery systems, announced today ... present at FireRock Capital,s Micro-Cap Conference. ... Tuesday, October 28, 2014 ,Time: 9:15am EST ,Location: The ... , About The FireRock Conference  ...
(Date:10/25/2014)... October 24, 2014 ... ) has announced the addition of the  ... And Other 2-D Nanomaterials "  report to ... , ,CNTs and graphene are the strongest, ... man, with a performance-per-weight greater than any ...
Breaking Biology Technology:ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 2ViaDerma, Inc. Announces Plans to Pursue Out-Licensing Partnerships in 2015 3Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 2Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 3Biodegradable Plastics Market Projected to $3,476.87 Million by 2019 - Report by MarketsandMarkets 4Oramed to Present at the FireRock Annual Micro-Cap Conference 2Oramed to Present at the FireRock Annual Micro-Cap Conference 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 2The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 3The Global Market for Carbon Nanotubes, Graphene and Other 2-D Nanomaterials 4
Cached News: