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:8/1/2014)... of a new study, including two Simon Fraser ... industry representatives and policymakers must collaborate closely on ... gas development. Viorel Popescu and Maureen Ryan, David ... Sciences department, are among eight international co-authors of ... Ecology and the Environment . , Shale gas ...
(Date:7/31/2014)... AMHERST, Mass. A first-of-its-kind study of bigeye tuna ... Lutcavage, director of the Large Pelagics Research Center at ... that these fish cover a wide geographical range with ... shelf, and they favor a high-use area off Cape ... research, which used a new approach to study one ...
(Date:7/31/2014)... Latinos are the largest minority group in the United ... of Latinos are obese and are 1.2 times as ... , NYU College of Nursing student researcher Lauren Gerchow, ... factors that contribute to this problem by compiling a ... patterns in Latina women recently published in Nursing ...
Breaking Biology News(10 mins):Scientists warn time to stop drilling in the dark 2Scientists warn time to stop drilling in the dark 3Study of bigeye tuna in Northwest Atlantic uses new tracking methods 2Study of bigeye tuna in Northwest Atlantic uses new tracking methods 3NYU research looks to combat US Latina immigrant obesity 2
(Date:8/1/2014)... , Aug. 1, 2014 Research ... "The World Market for Flow Cytometry in ... http://photos.prnewswire.com/prnh/20130307/600769 ... are now an important component of advanced IVD ... instruments for cancer diagnostics, but their newer clinical ...
(Date:8/1/2014)... , Aug. 1. 2014 As one ... the 2014 AACC Annual Meeting & Clinical Lab Expo ... and patient care are introduced to the healthcare world. ... the Expo,s 650 exhibitors will include the latest diagnostic ... Advances in smartphones and biosensors have enabled the ...
(Date:8/1/2014)... , Aug. 1, 2014 One of the ... of personalized medicine, which is the practice of using ... to a patient,s individual biology. Personalized diagnostics—laboratory analyses that ... role in the lab,s future. This fall, AACC ... the latest science in this exciting field and the ...
(Date:8/1/2014)... , August 1, 2014 According ... Research "Biophotonics Market - Global Industry Analysis, Size, Share, ... was valued at USD 25.16 billion in 2013, which ... growing at a CAGR of 10.4% from 2014 to ... at  http://www.transparencymarketresearch.com/biophotonics-market.html Increasing demand for accurate ...
Breaking Biology Technology:The World Market for Flow Cytometry in IVD Applications 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 2Lab-on-a-Chip Technology to Be Featured at 2014 AACC Annual Meeting & Clinical Lab Expo 3First-Ever AACC Virtual Conference to Focus on Personalized Diagnostics 2Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 2Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 3Global Biophotonics Market is Expected to Reach USD 50.20 Billion in 2020: Transparency Market Research 4
Cached News: