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:
*Name:
*Comment:
*Email:


(Date:3/14/2016)... -- NXTD ) ("NXT-ID" or the "Company"), a ... airing of a new series of commercials on Time Warner ... st .  The commercials will air on Bloomberg TV, Fox ... Street show. --> NXTD ) ("NXT-ID" or the ... announces the airing of a new series of commercials on ...
(Date:3/11/2016)... , March 11, 2016 ... new market research report "Image Recognition Market by Technology ... (Marketing and Advertising), by Deployment Type (On-Premises and Cloud), ... To 2022", published by MarketsandMarkets, the global market is ... to USD 29.98 Billion by 2020, at a CAGR ...
(Date:3/9/2016)... March 9, 2016 This BCC Research report ... of the RNA Sequencing (RNA Seq) market for the ... instruments, tools and reagents, data analysis, and services. ... of the RNA-Sequencing market such as RNA-Sequencing tools and ... main factors affecting each segment and forecast their market ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ... May 26, 2016 , ... Kinder Scientific (KinderScientific.com), a leading ... position the Company for the future. Kinder Scientific announces restructured ownership and ... been appointed Chairman of the Board, Curtis D. Kinghorn has been appointed CEO/President ...
(Date:5/25/2016)... ... May 25, 2016 , ... ... of fracture-specific plating options designed to address fractures of the distal tibia and ... , The Acumed Ankle Plating System 3 is composed of seven plate families ...
(Date:5/25/2016)... UTAH. (PRWEB) , ... May 25, 2016 , ... WEDI, ... healthcare information exchange, today announced that Charles W. Stellar has been named by the ... interim CEO since January 2016. As an executive leader with more than 35 years ...
(Date:5/24/2016)... TEL AVIV, Israel , May 24, 2016   ... on providing physicians with artificial intelligence, real-time decision support tools ... selected to present at the 2016 Israeli Advanced Technology Industries ... part of Israel,s 15th National Life ... to 26th at the David Intercontinental Hotel in ...
Breaking Biology Technology:
Cached News: