HOME >> BIOLOGY >> NEWS
Muscling their way into the food chain: Zebra mussels alter fish populations in the Hudson River

In 1991, an exotic bivalve called the zebra mussel moved into the Hudson River. Over the past two decades, the prolific species has colonized habitats with hard sediments, becoming the most abundant animal in the river's freshwater reaches. As competitors in the aquatic food chain, scientists have long speculated that zebra mussels may impact fish. A recent Canadian Journal of Fisheries and Aquatic Sciences article, written by Dr. David L. Strayer of the Institute of Ecosystem Studies (IES) and Drs. Kathryn A. Hattala and Andrew W. Kahnle of the NY State Department of Environmental Conservation (NYSDEC), has revealed that open-water fish species, like the commercially important American shad, are declining in response to the exotic invader.

Invasive species research is often limited by a lack of ecological data on pre-invasion conditions. Since the 1970s, utility companies on the Hudson River have gathered long-term data on juvenile fish populations as a condition of withdrawing cooling water from the river. These surveys began prior to the zebra mussel introduction, allowing for pre and post invasion assessment. Hudson River food web data has been collected by IES since the 1980s. Through analysis of this data, Strayer and colleagues have discovered that open-water fish, such as American shad and striped bass, have decreased in growth and abundance since the zebra mussel invasion. Conversely, species like sunfishes, which prefer vegetated shoreline habitat, have increased significantly.

Many of the open-water fish population declines were large and involved species of commercial or recreational importance, such as American shad and black bass. Strayer notes, "The changes we observed may lead to fewer adults of species such as American shad, and more adults of species such as redbreast sunfish in the Hudson. Maintaining a sustainable fishery for species like American shad, in the face of sharp population reductions, will be challenging. When a river
'"/>

Contact: Lori M. Quillen
quillenl@ecostudies.org
845-677-7600 x321
Institute of Ecosystem Studies
17-Aug-2004


Page: 1 2

Related biology news :

1. Mussels Muscling In, Crabs Pinching Native Species
2. Microbes eat their way to better concrete
3. Plumbing trees plumbing reveals their engineering skill
4. An exotic grass kills trees by hijacking their water
5. Sleepless over Seattle: Migrating songbirds forgo sleep but keep their wits
6. Bacteria spill their guts to aid researchers in quest for new antibiotics
7. New York City study shows newborns more susceptible to pollution than their mothers
8. AAAS 2004 salary survey: Despite long hours and low pay, life scientists love their work
9. Corals can reestablish symbiosis with algae from their environments after bleaching
10. Birds use herbs to protect their nests
11. Without words, bullfrogs communicate through stutters in their croaks

Post Your Comments:
(Date:3/10/2015)... OXFORD, Conn. , March 10, 2015 /PRNewswire/ ... NXTDW) ("NXT-ID" or the "Company"), a biometric authentication ... reports the company,s Wocket™ smart wallet has been ... 2015" by Rethink Modern. Rethink Modern ... sharing modern and innovative items for your home and lifestyle that ...
(Date:3/3/2015)... FOREST, Calif. , March 3, 2015 ... the leading provider of advanced cryogenic logistics ... markets including immunotherapies, stem cells, cell lines, ... and reproductive medicine, today announced the expansion ... Cancer Research Centers, ("Fred Hutch") Clinical ...
(Date:3/2/2015)... 2015   Neurotechnology , a provider of high-precision ... SentiGaze Software Development Kit (SDK). The SentiGaze algorithm ... off-the-shelf webcams to track eye movements and generate heatmaps ... Heatmaps can be used for applications such as analysis ... The SDK can also be used to develop interfaces ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 2Neurotechnology Releases SentiGaze SDK for Eye Movement Tracking Using Ordinary Webcams 3
(Date:3/30/2015)... , March 30, 2015 ... novel biological drugs to treat cancer, viral infections ... Professor Sir John Bell , the Regius ... of the Office for the Strategic Coordination of ... immediate effect.      (Photo: http://photos.prnewswire.com/prnh/20150330/736483 ...
(Date:3/29/2015)... , March 29, 2015  Caris Life ... data in small cell cervical cancer (SCCC) ... Molecular Intelligence®, the company,s panomic, comprehensive tumor ... mutations which may explain sensitivities and resistance ... identification of certain biomarkers may guide treatment ...
(Date:3/27/2015)... , 27. März 2015  Peter Walter ... Biomedical Science für seine bahnbrechende Arbeit ausgewählt, ... Zellkompartimenten transportiert werden, sowie für die Entschlüsselung ... Reaktion auf Stress nutzen, der mit der ... ist Professor für Biochemie an der University ...
(Date:3/27/2015)... , March 27, 2015 WuXi PharmaTech ... open-access R&D capability and technology platform company serving ... announced today that an Investigational New Drug (IND) ... for rheumatoid arthritis has been accepted for review ... In September 2012, MedImmune, the ...
Breaking Biology Technology:Immunocore Appoints Professor Sir John Bell to its Board of Directors 2Immunocore Appoints Professor Sir John Bell to its Board of Directors 3Immunocore Appoints Professor Sir John Bell to its Board of Directors 4Immunocore Appoints Professor Sir John Bell to its Board of Directors 5Study Using Caris Molecular Intelligence Multiplatform Tumor Profiling Identifies Potential Treatment Strategies for Small Cell Cervical Cancer 2Study Using Caris Molecular Intelligence Multiplatform Tumor Profiling Identifies Potential Treatment Strategies for Small Cell Cervical Cancer 3Deutschstämmiger Zellbiologe Peter Walter gewinnt den Vilcek Prize in Biomedical Science 2015 2Deutschstämmiger Zellbiologe Peter Walter gewinnt den Vilcek Prize in Biomedical Science 2015 3Deutschstämmiger Zellbiologe Peter Walter gewinnt den Vilcek Prize in Biomedical Science 2015 4Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 2Investigational New Drug Application for WuXi MedImmune's Monoclonal Antibody Accepted for Review by CFDA 3
Cached News: