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:2/26/2017)... DALLAS , Feb. 25, 2017  Securus ... justice technology solutions for public safety, investigation, corrections ... of Recidivism and Reentry. "Too often, ... State prisons and county jails are trying to ... of inmates and friends and family members. While significant ...
(Date:2/21/2017)... 2017 Der weltweite Biobanking-Sektor wird ... einem Gespräch mit mehr als 50 Vertretern aus verschiedenen Branchen ... gilt, um diese Prognose zu realisieren. ... Zu den ... finanziellen Mittel für die Biobank, die Implementierung Zeit sparender ...
(Date:2/13/2017)... , Feb. 13, 2017 Former 9/11 Commission ... Judiciary Committee, Janice Kephart of Identity Strategy ... Donald Trump,s "Executive Order: Protecting the Nation ... 27, 2017):  "As President Trump,s ,Travel Ban, ... has now essentially banned the travel ban, it is ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... ... March 23, 2017 , ... Advanced Polymer ... hire of Dr. Sigmund “Sig” Floyd as Vice President ? Global Business Development. ... development activities. , “Dr. Floyd’s career has spanned 30 years in the chemicals ...
(Date:3/22/2017)... , March 22, 2017  UBM and ... to announce their extended partnership and the third ... headlined by the 21 st Annual MassMEDIC ... taking place May 3-4, 2017. ... Technology Association (ADVAMED) President and CEO, Scott ...
(Date:3/22/2017)... 2017 The global chronic kidney ... report by Transparency Market Research (TMR). The top four ... AbbVie Inc., accounted for a share of only 41.4% ... this market are focusing aggressively on mergers, acquisitions, and ... likely to lead to market consolidation in the next ...
(Date:3/22/2017)... Pa. , March 22, 2017 /PRNewswire/ ... global independent provider of product and service ... today that it has acquired EPL Archives, ... supports customers across the entire regulated product ... archive sample, document storage and ancillary services. ...
Breaking Biology Technology: