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:12/7/2016)... India , December 7, 2016 According to a ... Machine Learning), Software Tool (Facial Expression, Voice Recognition), Service, Application Area, End User, ... is estimated to grow from USD 6.72 Billion in 2016 to USD 36.07 ... Continue Reading ... ...
(Date:12/7/2016)...   Veridium , a leader in biometrics-based ... CEO James Stickland . Stickland, a seasoned ... has served in senior executive roles for HSBC, ... expanding a pipeline of venture capital and accelerating ... served as managing director of U.K.-based fintech firm ...
(Date:12/6/2016)... , Dec. 6, 2016 Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... announced today a five (5) year funding commitment ... to expand the rehabilitation and reentry support to ... History Established in 2004, the Prison Entrepreneurship Program ...
Breaking Biology News(10 mins):
(Date:1/12/2017)... Linda, Ca (PRWEB) , ... ... ... for low-cost, disposable devices with short response times capable of performing routine ... food fields, disposable screen-printed electrodes provide fast, sensitive detection and quantification of ...
(Date:1/12/2017)... ... January 12, 2017 , ... After her ... Rosendahl’s doctors gave her only a few months to live. Now a paper ... has stabilized Rosendahl’s disease and increased both the quantity and quality of her ...
(Date:1/12/2017)... 2017   Protein Sciences Corporation , a ... Flublok Influenza Vaccine ®, announced today that its ... safety results and induced strong neutralizing antibodies against ... is expected to advance into human clinical trials ... Institute of Technology in Immunobiologicals of the Oswaldo ...
(Date:1/12/2017)... The report "Direct-Fed Microbials Market by Type (Lactic Acid Bacteria and Bacillus), Livestock (Pork/Swine, ... Forecast to 2022", published by MarketsandMarkets, the global market is estimated to be ... Million by 2022, at a CAGR of 6.96% from 2016. ... ... Logo ...
Breaking Biology Technology:
Cached News: