Minimum Flow Recommendation for Passage of Colorado Squawfish and Razorback Sucker in the 2.3-mile Reach of the Lower Gunnison River PDF Download
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Author: Bob D. Burdick
Publisher:
ISBN:
Category : Colorado pikeminnow
Languages : en
Pages : 152
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Book Description
Author: Bob D. Burdick
Publisher:
ISBN:
Category : Colorado pikeminnow
Languages : en
Pages : 152
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Book Description
Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 196
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Book Description
Author: Gordon Mueller
Publisher:
ISBN:
Category : Colorado River (Colo.-Mexico)
Languages : en
Pages : 90
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Book Description
The Colorado River had one of the most unique fish communities in the world. Seventy-five percent of those species were found nowhere else in the world. Settlement of the lower basin brought dramatic change to both the river and its native fish. Those changes began more than 120 years ago as settlers began stocking nonnative fishes. By 1930, nonnative fish had spread throughout the lower basin and replaced native communities. All resemblance of historic river conditions faded with the construction of Hoover Dam in 1935 and other large water development projects. Today, few remember what the Colorado River was really like. Seven of the nine mainstream fishes are now Federally-protected as endangered. Federal and state agencies are attempting to recover these fish. However, progress has been frustrated due to the severity of human impact. This report represents testimony, old descriptions, and photographs describing the changes that have taken place in hopes that it will provide managers, biologists, and the interested public a better appreciation of the environment that shaped these unique fish.
Author: William Joe Simonds
Publisher:
ISBN:
Category : Grand River Valley (Colo.)
Languages : en
Pages : 48
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Book Description
Author: David Clark
Publisher:
ISBN:
Category : Dams
Languages : en
Pages : 32
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Book Description
Author: Harold M. Tyus
Publisher: CRC Press
ISBN: 1439858543
Category : Nature
Languages : en
Pages : 576
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Book Description
Written as a stand-alone textbook for students and a useful reference for professionals in government and private agencies, academic institutions, and consultants, Ecology and Conservation of Fishes provides broad, comprehensive, and systematic coverage of all aquatic systems from the mountains to the oceans. The book begins with overview discussions on the ecology, evolution, and diversity of fishes. It moves on to address freshwater, estuarine, and marine ecosystems and identifies factors that affect the distribution and abundance of fishes. It then examines the adaptations of fishes as a response to constraints posed in ecosystems. The book concludes with four chapters on applied ecology to discuss the critical issues of management, conservation, biodiversity crises, and climate change. Major marine fisheries have collapsed, and there are worldwide declines in freshwater fish populations. Fishery scientists and managers must become more effective at understanding and dealing with resource issues. If not, fish species, communities, and entire ecosystems will continue to decline as habitats change and species are lost. Ecology and Conservation of Fishes has taken a historical and functional approach to explain how we got where we are, providing old and new with a better foundation as ecologists and conservationists, and most importantly, it awakens senses of purpose and need. Past management practices are reviewed, present programs considered, and the need for incorporating principles of applied ecology in future practices is emphasized.
Author: Michael Collier
Publisher:
ISBN:
Category : Chattahoochee River
Languages : en
Pages : 112
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Book Description
Outlines the role of science in restoring or otherwise altering unwanted downstream effects of dams, including eroding river banks, changes in waterfowl habitat, threats to safe recreational use, and the loss of river sand bars, examining seven selected areas of the country -- the upper Salt River in central Arizona; the Snake River in Idaho, Oregon and Washington; the Rio Grande in New Mexico and Texas; the Chattahoochee River in Georgia; the Platte River in Wyoming, Colorado and Nebraska; the Green River in Utah; and the Colorado River in Arizona -- to focus on specific downstream effects of dams and the management issues related to their operation.
Author: Caitlin Coleman
Publisher:
ISBN: 9780985707118
Category :
Languages : en
Pages :
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Book Description
Author: Michael Gilpin
Publisher: Academic Press
ISBN: 0323155235
Category : Science
Languages : en
Pages : 341
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Book Description
Metapopulation Dynamics: Empirical and Theoretical Investigations covers the 1989 proceedings of a metapopulation dynamics workshop held at Lammi Biological Station, Helsinki, Finland. It is divided into 18 chapters that cover various approaches to spatially structured population and community dynamics. After briefly discussing the history of metapopulation ideas and the major conceptual links, the book covers types of studies that have been conducted on single-species and multispecies metapopulations. Then, it examines the relationships between metapopulation dynamics, the equilibrium theory of island biogeography, and the dynamics of populations living in patchy environments. It further tackles practical issues and the links between metapopulation dynamics and landscape ecology, and between metapopulation dynamics and conservation biology. Chapters 4 and 5 present structured models describing changes in the number of individuals within patches and an empirical evaluation of local extinction in metapopulation studies. The subsequent chapters discuss several aspects of metapopulation, including dispersal and connectivity, colonization, conspecific attraction, extinction and isolation, and forest fragmentation. The latter chapters describe the concept of habitat fragmentation, the diversity and competition in metapopulations, the community collapse, and the effects of metapopulation studies in predator-prey systems.
Author: National Audubon Society
Publisher: Houghton Mifflin Harcourt
ISBN: 9780395911747
Category : Nature
Languages : en
Pages : 440
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Book Description
"The Birder’s Bible" for more than 60 years, Roger Tory Peterson’s classic Field Guide to Western Birds includes all species found in North America west of the 100th meridian and north of Mexico. Featuring the unique Peterson Identification System, Western Birds contains 165 full-color paintings that show more than 1,000 birds from 700 species. Summer and winter ranges, breeding grounds, and other special range data are shown on easy-to-read range maps.
