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:


(Date:8/21/2020)... ... August 19, 2020 , ... “How can we ... dedicated to Salivary Bioscience for more than twenty years. Together with Douglas Granger, ... " Salivary Bioscience: Foundations of Interdisciplinary Saliva Research and Applications ," and Steven ...
(Date:8/7/2020)... FRANCISCO (PRWEB) , ... August 06, 2020 , ... ... life sciences industry, is pleased to announce that Eric Chen and Jessica Wong ... President of Product Management & Strategy, respectively. , Eric Chen heads development efforts ...
(Date:7/31/2020)... ... July 30, 2020 , ... ... product portfolio with a near term focus on Type 2 diabetes and associated ... experience across multiple therapeutic areas and classes. As Chief Commercial Officer, Justin will ...
Breaking Biology News(10 mins):
(Date:7/1/2020)... (PRWEB) , ... June 29, 2020 , ... ... access to competitively procured purchasing contracts to its membership, recently named BioFit ... TIPS members with the opportunity to purchase ergonomic seating, cafeteria tables, book trucks ...
(Date:6/28/2020)... NIGUEL, Calif. (PRWEB) , ... June 25, 2020 , ... ... announced the launch of Safe Space™ for businesses of all types to ensure cleanliness, ... 3D LiDAR. , A Safe Space™ enabled business will provide a health ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... therapy for treating cancer, today announced the company has entered a license agreement ... The agreement provides Lumeda globally exclusive rights to Roswell Park intellectual property surrounding ...
(Date:6/23/2020)... ... June 23, 2020 , ... ... lab-made bioresearch materials, today announced the availability of the Delta-G-VSV Pseudotyping System for ... of Tennessee, enables studies of SARS-CoV-2 viral entry and COVID-19 vaccine effectiveness at ...
Breaking Biology Technology:
Cached News: