Navigation Links
Heavy metal link to mutations, low growth and fertility among crustaceans in Sydney Harbor tributary
Date:8/25/2008

Heavy metal pollutants are linked to genetic mutations, stunted growth and declining fertility among small crustaceans in the Parramatta River, the main tributary of Sydney Harbour, new research shows.

The finding adds to mounting evidence that toxic sediments and seaweeds in Sydney Harbour are a deadly diet for many sea creatures.

The new findings, published in the journal, Science of the Total Environment, reveal genetic mutations among crustaceans (Melita plumulosa) in the Parramatta River but none among those in the cleaner Hawkesbury River.

Earlier this year, UNSW scientists revealed that copper-contaminated seaweeds in Sydney Harbour were killing 75 percent of the offspring of small crustaceans that feed on a common brown seaweed.

That study showed that the harbour's seaweeds have the world's highest levels of copper and lead contamination as a consequence of stormwater run-off, industrial wastewaters and motorised watercraft.

The new study found the mutations and lower growth and fertility persisted through several generations of M. plumulosa in controlled laboratory conditions, suggesting that genetic changes are causing permanent negative impacts.

"The lower fertility and growth rates among the creatures exposed to contaminants is probably a stress response," says the study's lead author, UNSW science honours student, Pann Pann Chung.

The crustaceans were randomly sampled from two sites within each river: Homebush Bay South and Duck River in the Parramatta River, and Mooney Mooney and Half Moon Bend in the Hawkesbury.

M. plumulosa is a shrimp-like creature found among rocks and mudflats on shorelines and tide zones, although little is known about its genetic history. A native to the south-eastern coast of Australia, the amphipod feeds on organic material in sand and sediment.

"These crustaceans are sensitive to heavy metals such as copper, cadmium and zinc and scientists use them as a 'test organisms' for assessing the toxicity of marine sediments, says Ms Chung. "They accumulate heavy metals inside their tissues and scientists use them to monitor environmental pollutants."

Other research has revealed that chronic exposure to metal toxicants is linked to DNA damage in earthworms, periwinkles and some fish species.


'/>"/>

Contact: Dan Gaffney
headlines.news@gmail.com
61-411-156-015
University of New South Wales
Source:Eurekalert

Related biology news :

1. Heavy rainfall on the increase
2. Heavy metals in the Peak District -- evidence from bugs in blanket bogs
3. Alzheimers starts earlier for heavy drinkers, smokers
4. Scientists develop a fast system to detect metal concentrations in iron and steel industry workers
5. Metal foam has a good memory
6. UDs Bobev receives NSF Early Career Award for research on novel compounds of rare Earth metals
7. Can certain metals repel sharks from fishing gear?
8. Circadian clock controls plant growth hormone
9. Population movements and money remittances spur forest regrowth
10. Paracetamol, one of most used analgesics, could slow down bone growth
11. Targeting nerve growth factor may cure liver cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... , Apr. 11, 2017 Research and ... Market 2017-2021" report to their offering. ... The global eye tracking market to grow at a ... report, Global Eye Tracking Market 2017-2021, has been prepared based on ... covers the market landscape and its growth prospects over the coming ...
(Date:4/11/2017)... 11, 2017 NXT-ID, Inc. (NASDAQ:   ... announces the appointment of independent Directors Mr. Robin D. ... Board of Directors, furthering the company,s corporate governance and expertise. ... Gino Pereira , ... forward to their guidance and benefiting from their considerable expertise ...
(Date:4/5/2017)... 5, 2017  The Allen Institute for Cell Science ... a one-of-a-kind portal and dynamic digital window into the ... the first application of deep learning to create predictive ... lines and a growing suite of powerful tools. The ... and future publicly available resources created and shared by ...
Breaking Biology News(10 mins):
(Date:6/22/2017)... ... ... Charm Sciences, Inc. is pleased to announce that its Charm Amphenicol (AMPH) test ... screening test at dairies and farms for raw commingled cow milk. The test was ... system. These systems are a combination incubator and reader in one. , “The AMPH ...
(Date:6/20/2017)... 2017  Kibow Biotech Inc., a pioneer in developing ... of a new patent covering a unique method for ... Patent and Trademark Office on May 23 rd ... of Bio award in 2014 in San ... approaches to chronic disease. Renadyl™, the first and only ...
(Date:6/19/2017)... ... 2017 , ... As Vice President, Product Services, Mr. Guinter ... support, and client process and SOP development. , Mr. Guinter brings a wealth ... for service providers and top-tier pharmaceuticals, and as an independent consultant supported a ...
(Date:6/16/2017)... Lexington, Massachusetts (PRWEB) , ... June 16, 2017 ... ... in medical device compliance and commercialization, has just announced two more sessions of ... of the series will focus on the world of online templates for design ...
Breaking Biology Technology: