Hudson River Fishes and their Environment

2006 ◽  
Keyword(s):  
Petromyzon Marinus ◽  
River System ◽  
Hudson River ◽  
Smallmouth Bass ◽  
Anguilla Rostrata ◽  
Alosa Pseudoharengus ◽  
Micropterus Dolomieu ◽  
American Eel ◽  
Large Numbers ◽  
Spawning Areas

<em>Abstract.</em>—Hudson River tributaries serve as spawning areas for substantial numbers of anadromous and potamodromous fishes, and are critical habitat for at least alewife <em>Alosa pseudoharengus</em>, sea lamprey <em>Petromyzon marinus</em>, white sucker <em>Catostomus commersonii</em>, and smallmouth bass <em>Micropterus dolomieu</em>. Those species that are resident in tributary mouths are often common, widespread taxa in the Hudson River system but they are rarely present in large numbers. We document high densities of American eel <em>Anguilla rostrata </em>in one tributary mouth (>13,000 eels/ha; 15–30 g/m<sup>2</sup>) and present observations supporting that this is typical of Hudson River tributaries. We suggest that the biology of American eel substantially determines the structure of the fish community and energy flow within these habitats. The presence of barriers and high density eel populations limit the import of marine and estuarine nutrients into Hudson River tributaries.

scholarly journals Fall diel diet composition of American eel (Anguilla rostrata) in a tributary of the Hudson River, New York, USA

2013 ◽  
Vol 28 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Emily M. Waldt ◽  
Ross Abbett ◽  
James H. Johnson ◽  
Dawn E. Dittman ◽  
James E. McKenna
Keyword(s):  
New York ◽  
Diet Composition ◽  
Hudson River ◽  
Anguilla Rostrata ◽  
American Eel

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Waste Treatment ◽  
Fish Assemblages ◽  
River System ◽  
Agricultural Runoff ◽  
Large River ◽  
Smallmouth Bass ◽  
Ohio River ◽  
Micropterus Dolomieu ◽  
Wabash River ◽  
Spotted Bass

<em>Abstract.</em>—The present ichthyofauna (1965–2001) of the Wabash River system is compared to that of three periods: presettlement through 1820, 1875–1900, and 1940– 1950. This second largest Ohio River tributary flows freely for 350 mi. However, its environment and watershed have been altered greatly from presettlement times; twothirds has been converted to agriculture, eliminating all prairies and most forests and wetlands. Canals, large and small dams, channelization, and effluents have extinguished 12 fish species, diminished some, and favored others. Thirteen of approximately 175 species are recent, including 3 aliens. Better municipal and industrial waste treatment has improved water quality, but excessive agricultural runoff remains detrimental to many fishes. Degraded habitats exacerbate these problems. Many sensitive species are today either absent or severely reduced in distribution and abundance compared to 50 years ago. Smallmouth bass <em>Micropterus dolomieu </em>has been replaced by largemouth bass <em>M. salmoides </em>or spotted bass <em>M. punctulatus, </em>and few visual piscivores occur except near reservoirs.

Trophic Linkage between Stream Centrarchids and Their Crayfish Prey

1992 ◽  
Vol 49 (8) ◽  
pp. 1714-1721 ◽  
Author(s):  
Charles F. Rabeni
Keyword(s):  
River System ◽  
Dry Weight ◽  
Smallmouth Bass ◽  
Annual Production ◽  
Level Energy ◽  
Micropterus Dolomieu ◽  
Selective Predation ◽  
Predator Prey Model ◽  
Total Annual Production ◽  
Rock Bass

Energetic links between smallmouth bass (Micropterus dolomieu) and rock bass (Ambloplites rupestris) and their crayfish foods were examined in an Ozark stream. A trophic level energy budget was developed by enumerating food habits for different age (size) fish, estimating annual production for both fish and crayfish, and using laboratory- and literature-derived bioenergetic and gross efficiency data. Both fishes began life feeding on small invertebrates (mayflies and chironomids) but within 3 mo switched to a diet of mainly crayfish and Cyprinidae. Total annual production of smallmouth bass was 0.262 g dry weight∙m−2∙yr−1 (6344 J) and rock bass 0.148 g∙m−2∙yr−1 (3607 J). Total annual production of crayfish was 4.15 g dry weight∙m−2∙yr−1 (55 736 J) for Orconectes luteus and 5.05 g∙m−2∙yr−1 (62 394 J) for O. punctimanus. Only about half of the crayfish production was available to fish, due to size-selective predation and behavioral traits of the prey. A predator–prey model suggested that nearly one third of total crayfish production during their vulnerable period was lost to centrarchids, and that half of the existing biomass was consumed. Fish are probably the major cause of mortality in crayfish and undoubtedly influence crayfish population dynamics and energy flow through the river system.

Low PCB Concentrations Observed in American Eel (Anguilla rostrata) in Six Hudson River Tributaries

2008 ◽  
Vol 15 (2) ◽  
pp. 215-226 ◽  
Author(s):  
Karin E. Limburg ◽  
Leonard S. Machut ◽  
Peter Jeffers ◽  
Robert E. Schmidt
Keyword(s):  
Hudson River ◽  
Anguilla Rostrata ◽  
American Eel

Relating American Eel Anguilla rostrata abundance to environmental DNA concentration in the Bronx River

2021 ◽  
Author(s):  
Sam C. Chin ◽  
John Waldman ◽  
Mike Bednarski ◽  
Merry Camhi ◽  
Jake LaBelle ◽  
...  
Keyword(s):  
Environmental Dna ◽  
Anguilla Rostrata ◽  
American Eel ◽  
Dna Concentration ◽  
Bronx River
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