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:4/24/2014)... world,s oceans play a crucial role in the ... ecosystems and atmosphere. Now scientists at Scripps Institution ... a leap forward in understanding the microscopic underpinnings ... dioxide to make new cells, a substantial portion ... sea as a buffet of edible molecules collectively ...
(Date:4/24/2014)... EAST LANSING, Mich. --- New research shows that cells ... than scientists originally thought. Even when missing critical components, ... in an alternative way. , In a study published ... of researchers at Michigan State University showed that cells ... duplicate their DNA. , "Our genetic information is stored ...
(Date:4/24/2014)... pleased to announce that it has assumed ownership of ... University of Wisconsin. , The Journal of ... journal that publishes papers on all aspects of the ... molecular to the ecological -- as well as their ... individuals and institutions, and it provides a reasonably priced ...
Breaking Biology News(10 mins):Microscopic organism plays a big role in ocean carbon cycling, Scripps scientists discover 2Microscopic organism plays a big role in ocean carbon cycling, Scripps scientists discover 3Cell resiliency surprises scientists 2ESA to publish the Journal of Insect Science 2
(Date:1/14/2014)... January 14, 2014 In recent years, ... and methods in product development and promotion has led ... This mistrust, fueled by concerns about the insidious impact ... reports of spectacular fines to the world’s biggest pharmas ...
(Date:1/14/2014)... Global Record Systems, LLC, (GRS), a ... for patients, physicians, the biopharmaceutical industry, regulators, payers, ... signing of a three-year Research Collaboration Agreement (RCA) ... This initiative is designed to generate disruptive ...
(Date:1/14/2014)... Bellingham, Washington, USA, and Cardiff, UK (PRWEB) January 13, ... and photonics technology development leader with more than 20 ... international society for optics and photonics . Hainsey will ... “We are delighted to have Dr. Hainsey join SPIE ...
(Date:1/14/2014)... 14, 2014 During the 1600’s through the ... “The Doctor’s Plague.” In this time period, doctors did not ... at times, to the death of vulnerable patients. In the ... that they may be unwittingly transmitting herpes viruses to their ...
Breaking Biology Technology:The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 2The Sunshine Act: Necessary Regulation or Unnecessary Dysregulation? New Life Science Webinar Hosted by Xtalks and IRB Services 3Global Record Systems Announces Research Collaboration Agreement with FDA to Create a Novel “Big Data” Paradigm for Collection of Patient Safety and Outcomes Information 2Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 2Study: Fatigued Medical Interns Infect Their Patients with Herpes Viruses; The CBCD Sees a Parallel with “The Doctor’s Plague” 3
Cached News: