Historical Changes in Large River Fish Assemblages of the Americas. Based on a symposium held in Phoenix, Arizona, 21 August 2001. American Fisheries Society Symposium, Volume 45. Edited by John N  Rinne, , Robert M  Hughes, and , Bob  Calamusso. Bethesda (Maryland): American Fisheries Society. $69.00 (paper). xvi + 612 p; ill.; no index. ISBN: 1–888569–72–7. 2005.

2006 ◽  
Vol 81 (1) ◽  
pp. 77-77
Keyword(s):  
Fish Assemblages ◽  
Large River ◽  
Historical Changes ◽  
Society Symposium ◽  
River Fish

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Fish Assemblage ◽  
Fish Assemblages ◽  
River Management ◽  
Large River ◽  
Large Rivers ◽  
Pertinent Literature ◽  
Historical Changes ◽  
Time To Learn ◽  
River Fish

<em>Abstract.</em>—This book’s objective is to document historical changes in the fish assemblages of large American rivers, and to determine patterns in and rationale for those changes. In this chapter, we review pertinent literature on large rivers and fish assemblages worldwide and briefly introduce the chapters. We expect that the information contained in this book will aid river management in general, and stimulate similar historical fish assemblage studies elsewhere. There will never be a better time to learn and understand what has been changed and to reverse or slow undesirable changes.

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Representative Sample ◽  
Fish Assemblages ◽  
Large River ◽  
Point Sources ◽  
Large Rivers ◽  
Government Agencies ◽  
Key Factors ◽  
Factors Affecting ◽  
Historical Changes ◽  
River Fish

<em>Abstract.</em>—The objective of this synthesis is to summarize patterns in historical changes in the fish assemblages of selected large American rivers, to document causes for those changes, and to suggest rehabilitation measures. Although not a statistically representative sample of large rivers, the book chapters indicated that physical and biological stressors usually had a greater impact on fish assemblages than chemical stressors (where point sources were treated). In particular, flow and channel regulation combined with alien species were key factors affecting large river fish assemblages. And these factors were most pronounced for southwestern U.S. rivers. We hope that such information will aid interested citizens and government agencies in river rehabilitation and river protection or conservation. There will never be a better time to do so.

scholarly journals Discontinuities and functional resilience of large river fish assemblages

Ecosphere ◽  
2018 ◽  
Vol 9 (7) ◽  
pp. e02351 ◽  
Author(s):  
Kristen L. Bouska
Keyword(s):  
Fish Assemblages ◽  
Large River ◽  
River Fish

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Water Quality ◽  
Land Management ◽  
Native Species ◽  
Fish Assemblages ◽  
Large River ◽  
Nonnative Species ◽  
Quarter Century ◽  
Aggressive Management ◽  
Major Factors ◽  
River Fish

<em>Abstract.</em>—Fish assemblages in the Verde River, Arizona have changed markedly over the last quarter century. Nonnative fishes increase from headwaters toward the mouth and individual native species decrease. River hydrograph and the introduction of nonnative species appear to be the major factors determining fish assemblages, although information is lacking on water quality and other land management impacts. During floods, native species dominated fish assemblages. By contrast, during droughts and sustained base flows, nonnative fishes increased. The threatened spikedace <em>Meda fulgida </em>has been collected only in the uppermost reach of this desert river and, even here, has been absent since 1997. Five other native species also have become less abundant or rare. Continued monitoring of fish assemblages, comparison with another large southwestern river, the Gila, and aggressive management are critical to sustain the native fish component of this river.

Development and Efficacy of an Electrified Benthic Trawl for Sampling Large-River Fish Assemblages

2009 ◽  
Vol 29 (4) ◽  
pp. 1001-1005 ◽  
Author(s):  
Jonathan A. Freedman ◽  
Timothy D. Stecko ◽  
Benjamin D. Lorson ◽  
Jay R. Stauffer
Keyword(s):  
Fish Assemblages ◽  
Large River ◽  
Benthic Trawl ◽  
River Fish

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Fish Assemblages ◽  
Age Groups ◽  
Fish Fauna ◽  
Flood Pulse ◽  
Large River ◽  
Commercial Fishing ◽  
Pulp Mills ◽  
Hydroelectric Project ◽  
Great Slave Lake ◽  
River Fish

<em>Abstract.</em>—The Slave River is the largest tributary to Great Slave Lake and the second largest river flowing northward in North America. There are no dams or major industrial developments on the lower Slave River, but further upstream in its Peace and Athabasca tributaries there are numerous pulp mills and a large hydroelectric project (Bennett Dam). These developments appear to have had limited effects on the Slave River fish fauna. The most significant concern is the reduced flood-pulse due to flow regulation, which is hypothesized to have affected spawning success in some species. The other major human impact is from commercial fishing on Great Slave Lake. Migratory species, such as inconnu, have been extirpated from some tributaries due to overfishing. In the Slave River, however, the impact of fishing on inconnu and other species appears to have been less severe. Although the number of age-groups has decreased within some species, the species composition appears to have remained stable. There is little evidence of species introductions into the system, but some rare species<em>, </em>such as chum salmon <em>Oncorhynchus keta</em>, may be extirpated.

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
Fish Assemblages ◽  
Temporal Trends ◽  
Well Being ◽  
Large River ◽  
Smallmouth Bass ◽  
Individual Species ◽  
Ohio River ◽  
Ohio River Valley ◽  
Micropterus Dolomieu ◽  
River Fish

<em>Abstract.</em>—The Ohio River Valley Water Sanitation Commission (ORSANCO), along with cooperating state and federal agencies, sampled fish assemblages from the lockchambers of Ohio River navigational dams from 1957 to 2001. To date, 377 lockchamber rotenone events have been conducted, resulting in the collection of nearly three million fishes, representing 116 taxa, including 7 hybrids, in 19 families. We observed significant temporal trends in Ohio River fish riverwide at the assemblage, guild, and species levels. Modified index of well-being (MIWB) scores and changes in guild structure indicated significantly (<em>p </em>< 0.05) improving fish assemblages throughout the Ohio River. Quantile regression of the abundance of individual species by year revealed significant declines (<em>p </em>< 0.05) in populations of several pollution-tolerant species (e.g., <em>Ameiurus </em>spp., goldfish <em>Carassius auratus</em>) with time, while some intolerant species (e.g., smallmouth redhorse <em>Moxostoma breviceps, </em>smallmouth bass <em>Micropterus dolomieu, </em>and mooneye <em>Hiodon tergisus</em>) have increased in recent years. In all, 40 of the 116 taxa collected in the lockchamber surveys changed significantly over time. Sixteen species did not change. Sixty species could not be analyzed either because of incomplete data or insufficient abundance. Fish assemblage metrics that would be expected to decrease with improving conditions in the Ohio River (percent tolerant individuals, percent nonindigenous individuals, and percent detritivore individuals) also declined (<em>p </em>< 0.05). These changes coincide with marked improvement of the water quality in the Ohio River over the last 50 years, particularly in the aftermath of the Clean Water Act (1972). Some species and metric responses may also be due to the replacement of the 50 wicket dams by the construction of 18 high-lift dams.

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