HOME >> BIOLOGY >> NEWS
New threat to commercial fishing

Commercial fishing practices can reduce genetic diversity in fish populations, possibly threatening their productivity and adaptability to environmental change, new research has found.

An Australian zoologist now at the University of Melbourne, along with colleagues from the United Kingdom and New Zealand, was the first to record a decline in the genetic diversity of a commercially exploited marine species. Their findings, published in the latest volume of the Proceedings of the National Academy of Sciences, shout a warning that could force a rethink to current fisheries management and the research focus into sustainable fishing.

Dr Greg Adcock analysed the DNA found in scales preserved from two populations of New Zealand snapper collected from the 1950s to 1998. One population had been commercially fished since the late 1800s. The other was a 'virgin' population, being subjected to subsistence and recreational fishing only until the scale collection began.

Adcock and colleagues found that the 'virgin' population from Tasman Bay on New Zealand's South Island had suffered an unexpected decline in genetic diversity, starting from the time it began to be commercially exploited in the 1950s.

The other population, from the North Island's Hauraki Bay, showed no decline in genetic diversity in the nearly 50 years to 1998.

The paper reports that the Tasman Bay's effective population size (the number of fish in the population capable of breeding) is100,000 times fewer than its total number, and several orders of magnitude lower than expected.

"In Tasman Bay, commercial fishing has often reduced total numbers to as low as about one million. This leaves only a few hundred fish to contribute to the next generation, a dangerously low genetic base from which to sustain a population," says Adcock.

"With a high effective population you can retain a large amount of rare genetic variation. Such variation is lost as numbers
'"/>

Contact: Jason Major
jmajor@unimelb.edu.au
61-3-8344-0181
University of Melbourne
13-Aug-2002


Page: 1 2 3

Related biology news :

1. Scientists decipher genetic code of biothreat pathogen
2. Identifying tick genes could halt disease, bioterrorism threat
3. UC Irvine scientists to develop vaccine to combat bioterrorism threat from deadly bacteria
4. Increasing international insect threat to stored food
5. Report outlines steps needed to lessen smallpox threat
6. Computer model shows increased US threat from soybean rust
7. Danger spots identified for threatened grizzly bear
8. 51 globally threatened species get new lease on life in the Caucasus
9. Disease threatens cucumbers, pumpkins, and other vine crops
10. Urban runoff poses increased health threat for surfers, other beach users, UCI study shows
11. City rain run-off poses threat to coastal water users

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New threat commercial fishing

(Date:7/27/2014)... might have survived the asteroid strike that wiped them ... later in history, scientists say. , A fresh study ... helped palaeontologists to build a new narrative of the ... They found that in the few million years before ... was experiencing environmental upheaval. This included extensive volcanic activity, ...
(Date:7/27/2014)... have shown the potential for global climate change to ... most part, ignored the interactions between increasing temperature and ... to damage crops. , A new study involving researchers ... significant, suggesting that policymakers need to take both warming ... , The study looked in detail at global production ...
(Date:7/25/2014)... the first broad-scale estimate of air pollution removal by ... that trees are saving more than 850 human lives ... symptoms. , While trees, pollution removal equated to an ... the impacts of that improvement are substantial. Researchers valued ... at nearly $7 billion every year in a study ...
Breaking Biology News(10 mins):Dinosaurs fell victim to perfect storm of events, study shows 2Study: Climate change and air pollution will combine to curb food supplies 2Study: Climate change and air pollution will combine to curb food supplies 3First national study finds trees saving lives, reducing respiratory problems 2
(Date:7/28/2014)... new method of building materials using light, developed by ... enable technologies that are often considered the realm of ... , Although cloaked starships won,t be a reality ... developed for constructing materials with building blocks a few ... control the way that light flies through them, and ...
(Date:7/28/2014)... July 28, 2014 “2014 ... Lubricant Industry” is a professional and in-depth ... market. The report introduces Lubricant basic information, ... chain structure and industry overview. This research ... domestic market as well as global industry ...
(Date:7/28/2014)... -- Research and Markets has announced the ... report to their offering. ... covers the designing and engineering of completely new biological ... of natural biological systems that provide improved and desirable ... extreme genetic engineering because it not only alters existing ...
(Date:7/28/2014)...  David Hardison, Ph.D., vice president of health ... been elected chairman of the board for the ... to establish common protocols around the use of ... electronic health records. Hardison will ... organizations across the research and health care arena ...
Breaking Biology Technology:Building 'invisible' materials with light 2Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 2Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 3Lubricant Market & Adhesion Promoter Industry (Globa, China) Analysis Now Available at DeepResearchReports.com 4Global Synthetic Biology Market 2014-2018 2ConvergeHEALTH by Deloitte's David Hardison Named Chairman of the Clinical Data Interchange Standards Consortium 2ConvergeHEALTH by Deloitte's David Hardison Named Chairman of the Clinical Data Interchange Standards Consortium 3
Cached News: