Download or read book Genetic Variation of Rainbow Trout from the Snake River and Harney Basins written by Kenneth P. Currens and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wild Trout VII written by and published by . This book was released on 2000 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Molecular Genetic Analysis of Rainbow Trout Populations written by Mark Joseph Bagley and published by . This book was released on 1997 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hybridization Between Yellowstone Cutthroat Trout and Rainbow Trout in the Upper Snake River Basin Wyoming written by Ryan P. Kovach and published by . This book was released on 2011 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human-induced hybridization between fish populations and species is a major threat to aquatic biodiversity worldwide and is particularly relevant to management of the subspecies of cutthroat trout Oncorhynchus clarkii. The upper Snake River basin in Wyoming contains one of the largest remaining populations of Yellowstone cutthroat trout O. clarkii bouvieri, a subspecies of special concern throughout its range; however, little is known about levels of hybridization between Yellowstone cutthroat trout and exotic rainbow trout O. mykiss or about the overall genetic population structure for this river basin. There is concern that the Gros Ventre River is a source of hybridization for the Snake River basin. We sampled across the upper Snake River basin to estimate levels of hybridization and population structure and to describe hybrid zone structure and spatial patterns of hybridization throughout the basin. We used this information to help resolve whether the Gros Ventre River was acting as a potential source of hybridization for the upper Snake River basin. We found that Yellowstone cutthroat trout genotypes dominated the river system, but hybridization was detected at low levels in all populations. The Gros Ventre River contained the highest levels of hybridization (population and individual) and displayed evidence of ongoing hybridization between parental genotypes. Levels of hybridization decreased as a function of distance from the Gros Ventre River, suggesting that this population is acting as a source of rainbow trout genes. These patterns were evident despite the fact that levels of genetic connectivity appeared to be higher than those observed in other cutthroat trout populations (global genetic differentiation index F ST = 0.04), and we did not find evidence for genetic isolation by distance. Management actions aimed at reducing the presence of highly hybridized cutthroat trout or rainbow trout individuals in the Gros Ventre River will help to maintain the upper Snake River basin as an important conservation area.

Download or read book Genetic Variation in the Rainbow Trout Population in the Firehole River written by David Lawrence Browne and published by . This book was released on 1978 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Variation of Rainbow Trout Oncorhynchus Mykiss in Jenny Creek Oregon written by Kenneth P. Currens and published by . This book was released on 1987 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Search for the Kern River Rainbow written by Peter Bjorn Erickson and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Kern River rainbow trout (Oncorhynchus mykiss gilberti, "KRRT"), like many freshwater fish, has been heavily impacted by the introduction of non-native species into its native range. Angling interest in the region beginning over a century ago led to rampant transplantation of several different types of trout into lakes and streams throughout KRRT's range, the upper Kern River basin in southern California. These introductions resulted in hybridization and introgression with KRRT, and a dwindling number of purely native fish. In the following chapters I use genetic tools to examine the impact of this history of introductions, to measure current genetic characteristics of wild populations, and to provide guidance for the development of KRRT hatchery broodstock with the hope of helping to preserve one of California's native fish. In Chapter 1, I used SNP (single nucleotide polymorphism) and microsatellite markers to determine if a consistent genetic signature of KRRT within the upper Kern River basin still exists. I then measured introgression between KRRT and non-native trout, including coastal rainbow trout (O. mykiss), Little Kern golden trout (O. m. whitei), and California golden trout (O. m. aguabonita). We found that there is indeed still a genetic signature distinct from the non-native trout that have been introduced, but that introgression with those fish is widespread. Nonetheless, we did find several populations with very little introgression, and discovered that a number of populations in the upper Kern River basin still largely represent the native genotype, despite the lengthy history of stocking. In Chapter 2, I used microsatellites to examine gene flow and genetic diversity, particularly as they related to introgression. I found that those populations that have escaped introgression seem to have done so by being reproductively isolated from other populations. This isolation, however, coincides with reduced genetic diversity and genetic signs of population bottlenecks. In this way, avoidance of the primary threat to KRRT has exposed isolated populations to the threats of small population size and reduced genetic diversity. In Chapter 3, I present a Hatchery Genetic Management Plan for KRRT. This plan details recommendations for the collection of wild KRRT, and the development and maintenance of a hatchery broodstock to be planted back into the Kern River in areas currently planted with non-native trout. I describe the genetic factors germane to maximizing genetic diversity, limiting inbreeding, and limiting adaptation to captivity. I also provide guidelines for planting the resulting fish, and for monitoring both existing wild populations as well as hatchery-origin fish. This plan is an important part of helping to restore KRRT to its native range, while ensuring proper management of KRRT populations that still exist. Although this research focuses on KRRT, the issues addressed are relevant to a broader array of taxa threatened by the introduction of non-native species. In particular, the retention of a KRRT genetic signal despite a long history of introductions indicates some degree of resistance on the part of native taxa, and has implications for invasion biology. In addition, the balance between the competing threats of introgression and low genetic diversity provides an example of the many challenges involved in the attempt to preserve biodiversity in a changing world.

Download or read book Multiscale Genetic Structure of Yellowstone Cutthroat Trout in the Upper Snake River Basin written by and published by . This book was released on 2006 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Populations of Yellowstone cutthroat trout Oncorhynchus clarkii bouvierii have declined throughout their native range as a result of habitat fragmentation, overharvest, and introductions of nonnative trout that have hybridized with or displaced native populations. The degree to which these factors have impacted the current genetic population structure of Yellowstone cutthroat trout populations is of primary interest for their conservation. In this study, we examined the genetic diversity and genetic population structure of Yellowstone cutthroat trout in Idaho and Nevada with data from six polymorphic microsatellite loci. A total of 1,392 samples were analyzed from 45 sample locations throughout 11 major river drainages. We found that levels of genetic diversity and genetic differentiation varied extensively. The Salt River drainage, which is representative of the least impacted migration corridors in Idaho, had the highest levels of genetic diversity and low levels of genetic differentiation. High levels of genetic differentiation were observed at similar or smaller geographic scales in the Portneuf River, Raft River, and Teton River drainages, which are more altered by anthropogenic disturbances. Results suggested that Yellowstone cutthroat trout are naturally structured at the major river drainage level but that habitat fragmentation has altered this structuring. Connectivity should be restored via habitat restoration whenever possible to minimize losses in genetic diversity and to preserve historical processes of gene flow, life history variation, and metapopulation dynamics. However, alternative strategies for management and conservation should also be considered in areas where there is a strong likelihood of nonnative invasions or extensive habitat fragmentation that cannot be easily ameliorated.

Download or read book Increasing Levels of Genetic Variation in Erwin Rainbow Trout by Backcrossing with Arlee X Erwin Hybrids written by Robb F. Leary and published by . This book was released on 1989 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Great Basin Aquatic Systems History written by Donald R. Currey and published by . This book was released on 2002 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Native Trout of Western North America written by Robert J. Behnke and published by . This book was released on 1992 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Snakeheads Pisces Channidae written by Walter R. Courtenay and published by Geological Survey (USGS). This book was released on 2004 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Oregon Sportsman written by and published by . This book was released on 1913 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiple Species Inventory and Monitoring Technical Guide written by Patricia N. Manley and published by . This book was released on 2006 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monitoring protocols are presented for: landbirds; raptors; small, medium and large mammals; bats; terrestrial amphibians and reptiles; vertebrates in aquatic ecosystems; plant species, and habitats.

Download or read book Endangered and Threatened Wildlife and Plants Revised Designation of Critical Habitat for Bull Trout in the Coterminous United States Us Fish and Wildlife Service Regulation Fws 2018 Edition written by The Law The Law Library and published by Createspace Independent Publishing Platform. This book was released on 2018-11-04 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endangered and Threatened Wildlife and Plants - Revised Designation of Critical Habitat for Bull Trout in the Coterminous United States (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) The Law Library presents the complete text of the Endangered and Threatened Wildlife and Plants - Revised Designation of Critical Habitat for Bull Trout in the Coterminous United States (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition). Updated as of May 29, 2018 We, the U.S. Fish and Wildlife Service, are revising critical habitat for the bull trout (Salvelinus confluentus) under the Endangered Species Act of 1973, as amended (Act). We are designating a total of 31,750.8 km (19,729.0 mi) of streams (which includes 1,213.2 km (754.0 mi) of marine shoreline) and are designating a total of 197,589.2 ha (488,251.7 ac) of reservoirs and lakes. The areas designated as critical habitat are located in the States of Washington, Oregon, Nevada, Idaho, and Montana. This book contains: - The complete text of the Endangered and Threatened Wildlife and Plants - Revised Designation of Critical Habitat for Bull Trout in the Coterminous United States (US Fish and Wildlife Service Regulation) (FWS) (2018 Edition) - A table of contents with the page number of each section

Download or read book Ken Schultz s Field Guide to Saltwater Fish written by Ken Schultz and published by For Dummies. This book was released on 2003-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive field guide to North American saltwater fish-from the absolute authority on sportfishing Before you head out to the open seas, listen up: Your tackle box is not complete without Ken Schultz's Field Guide to Saltwater Fish! Written by one of the foremost experts in sportfishing, this colorful reference provides anglers and fish enthusiasts of all levels an easy-to-use, indispensable guide to help you identify and learn about the most common species found off the North American coastlines-from albacore to yellowtail. Based on the award-winning reference book Ken Schultz's Fishing Encyclopedia, this handy field guide compresses the essence of its bestselling predecessor into a more manageable, compact size. Arranged alphabetically by species, each entry covers the identification, size/age, distribution, habitat, life history/behavior, and feeding habits of each fish. This fully illustrated, full-color guide makes it easy to identify what's at the end of your line. You'll learn how to distinguish an Atlantic mackerel from a Spanish mackerel, for instance; why you might mistake a cobia for a shark or a remora; how the red grouper's saddle spot will help you tell it apart from a Nassau grouper; and so much more. Written for the 16 million people who enjoy saltwater fishing, Ken Schultz's Field Guide to Saltwater Fish features: 227 of the most common saltwater fish Large, full-color illustrations to help you identify your catch Approachable organization in a compact, take-along size A comprehensive glossary that explains the terms used in the species profiles Overview and anatomy sections written in layman's terms Ken Schultz's Field Guide to Saltwater Fish is a must-have for any fan of America's favorite pastime: fishing!

Download or read book Trout and Salmon of North America written by Robert Behnke and published by Simon and Schuster. This book was released on 2010-07-06 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This beautiful and definitive guide brings together the world's lead leading expert on North American trout and salmon, Robert Behnke, and the foremost illustrator in the field, Joseph Tomelleri. North America is graced with the greatest diversity of trout and salmon on earth. From tiny brook trout in mountain streams of the Northeast, to cutthroat trout in the rivers of the Rockies, to Chinook salmon of the Pacific, the continent is home to more than 70 types of trout and salmon. How this came to be, how they are related, and what makes them unique -- and so breathtaking -- is the story of Trout and Salmon of North America. The more than 100 illustrations of trout and salmon by Joseph Tomelleri showcased here exhibit a genius for detail, coloration, and proportion. Each portrait is made from field notes, streamside observations, photographs, and specimens collected by the artist. The result is a set of the most accurate and stunning illustrations of fish ever created. Robert Behnke has distilled 50 years of his research and writing about trout and salmon in completing this book. No one understands better than Behnke the diversity and conservation issues concerning these fishes or communicates so lucidly the biological wonders and complexities of their particular beauty. Also included are more than 40 richly detailed maps that clearly show the ranges of populations of trout and salmon throughout North America. An irresistible delight for anyone who appreciates natural history, Trout and Salmon of North America is a master guide to the natural elegance of our native fishes.