Navigation Links
Changing the course of nature: Are fisheries directing the evolution of fish populations?
Date:9/10/2009

For many of the types of fish we buy in stores or order in restaurants, the chance that an individual dies from fishing is several times higher than dying of natural causes. This may seem obvious to most (they had to get to our table somehow), but what may not be apparent is that the relentless pursuit of consumer-friendly fish product is having a massive impact on fish populations around the world. By repeatedly choosing only the biggest fish, or only those found in certain habitats, the fisheries industry may be permanently altering the genetic composition of fish populations.

What are the long-term evolutionary implications of prolonged fishing for the fish that humans and, perhaps more importantly, diverse ecosystems so depend on? A group of concerned international scientists convened at the 2008 American Fisheries Society Annual Meeting to address this issue, and contributions to the symposium are now available online in an August 2009 special issue of Evolutionary Applications.

Several groups of scientists focused on teasing apart how much of the shift in fish morphology, development and behavior that has been documented over the years is due to genetic versus non-genetic changes. Long-term genetic changes may be more problematic since these may not be reversible and they make predicting the composition of fish stocks in the future very difficult. Equally contentious among scientists was distinguishing between changes that were caused by artificial selection due to fishing per se, versus environmental influences such as habitat destruction or climate change.

The articles in the special issue use multiple approaches to address these concerns and together come to the conclusion that in many cases, fish stocks are indeed evolving in response to the artificial selection pressure imposed by fishing. Shifts in yield-determining traits such as growth and maturation are evident, and how quickly these changes manifest depends on the type of fishing gear and the rate of harvest.

Given the uncertainty surrounding the future sustainability of wild fish stocks, fisheries evolution scientists make several key recommendations: protect a portion of the stock through the creation of non-fished marine protected areas, protect late-maturing and slow-growing individuals, and perhaps the most difficult but most effective: fish less.


'/>"/>

Contact: F. Galligan
fgalligan@wiley.com
44-186-547-6298
Wiley-Blackwell
Source:Eurekalert

Related biology news :

1. Forest Service to host 2nd International Conference on Forests and Water in a Changing Environment
2. Changing climate likely to make super weed even more powerful
3. Changing climate will lead to devastating loss of phosphorus from soil
4. Satellite snow maps help reindeer herders adapt to a changing Arctic
5. Changing sexes on the sea floor
6. National Science Foundation forum to address ecological connectivity and climate in a changing world
7. Dont go changing: New chemical keeps stem cells young
8. Survival in a Changing World: The Journal of Experimental Biology 2009 symposium
9. Honey bees on cocaine dance more, changing ideas about the insect brain
10. CSHL researchers map changing epigenetic modifications that enable transposons to run amok
11. Biogeography, changing climates and niche evolution
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2017)... 2017 PMD Healthcare announces the release of ... Management System (WMS), a remote, real-time lung health monitoring ... Healthcare is a Medical Device, Digital Health, and Chronic ... creating innovative solutions that empower people to improve their ... PMD developed the first ever personal spirometer, Spiro PD, ...
(Date:3/9/2017)... , Australia , March 9, 2017 ... data at the prestigious World Lung Imaging Workshop at ... Andreas Fouras , was invited to deliver the latest ... medicine. This globally recognised event brings together leaders at ... the latest developments in lung imaging. ...
(Date:3/7/2017)... LAKE CITY , March 7, 2017   ... that help top global companies identify the best talent, ... as Chief Sales Officer (CSO) and Diana ... Kucer,s appointments round out a seasoned executive team poised to ... and beyond, building on a year of record bookings ...
Breaking Biology News(10 mins):
(Date:3/27/2017)... 27, 2017  The global market for clinical ... to a new report from Kalorama Information.  In ... performed to evaluate disease progression, monitor drug treatment ... reasons.  The healthcare market research firm,s report, ... an overview of the medical laboratory industry and ...
(Date:3/27/2017)... ... ... PMG Research is pleased to announce its participation in the 2nd ... Boston on April 3-4, 2017. The CTC conference focuses on how the industry is ... closer to the patient. Clinical Trial Collaborations also will present an inaugural conference on ...
(Date:3/27/2017)... 2017 DarioHealth Corp. (NASDAQ: DRIO), a leading ... data solutions, today announced that it is now offering ... U.S. consumers who want to have their DarioHealth products ... strategic alliance agreements with partners across the U.S. who ... if approved, will supply and bill the customer,s insurance ...
(Date:3/24/2017)... and ROCKVILLE, Md. , March 24, ... Maxwell Biotech Venture Fund (MBVF), today announced positive results ... to the standard drug therapy regimen in patients with ... molecule drug discovered by scientists at Sequella, Inc. ( ... of Health. A total of 140 ...
Breaking Biology Technology: