EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Genetic Variation in the Rainbow Trout Population in the Firehole River

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:

Book Molecular Genetic Analysis of Rainbow Trout Populations

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:

Book Genetic Variation of Rainbow Trout from the Snake River and Harney Basins

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:

Book Effects of Temperature and Angling on Brown and Rainbow Trout Populations in the Firehole River Yellowstone National Park

Download or read book Effects of Temperature and Angling on Brown and Rainbow Trout Populations in the Firehole River Yellowstone National Park written by Edward D. Koch and published by . This book was released on 1990 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Search for the Kern River Rainbow

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.

Book Electrophoretic Survey of Protein Variation in Eight Strains of Rainbow Trout Salmo Gairdneri from the U S Fish and Wildlife Service Genetic Laboratory

Download or read book Electrophoretic Survey of Protein Variation in Eight Strains of Rainbow Trout Salmo Gairdneri from the U S Fish and Wildlife Service Genetic Laboratory written by George B. Milner and published by . This book was released on 1979 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Genetic Variability in a Species Possessing Extensive Gene Duplication

Download or read book Genetic Variability in a Species Possessing Extensive Gene Duplication written by Frederick William Allendorf and published by . This book was released on 1975 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1981 with total page 1740 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Fish Community Survey and Genetic Analysis of Rainbow Trout in Cottonwood Creek Whitman County Washington

Download or read book A Fish Community Survey and Genetic Analysis of Rainbow Trout in Cottonwood Creek Whitman County Washington written by Connie M. Fox and published by . This book was released on 2005 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The fish distribution in Cottonwood Creek, Whitman County, Washington, was documented through sampling efforts during 2003. Cottonwood Creek is a tributary of Rock Creek that enters about five kilometers below the outlet of Rock Lake. A total of 55 locations along Cottonwood Creek and its two main tributaries, Kamiache and Pleasant Valley Creeks, were electrofished to determine relative abundance of each species present. Eight species were collected throughout the drainage. Native minnows dominated the fish fauna, comprising 52% of all species collected. Two nonindigenous species, the brook stickleback, Culaea inconstans and fathead minnow, Pimephales promelas, were recorded for the first time in the Cottonwood Creek drainage. Rainbow trout, Oncorhynchus mykiss were also collected from this drainage. Rainbow trout in Cottonwood Creek could have come from 1) hatchery plants into Rock Lake (Washington Department of Fish and Wildlife has stocked the lake with rainbow trout from the Spokane and Lyons Ferry hatcheries); 2) wild (naturally reproducing) fish derived from these hatchery stocks, or 3) an indigenous population of wild (naturally reproducing) interior redband trout. The fish appeared to be wild (naturally reproducing) because they did not bear characteristic markings of a hatchery fish, such as stubby fins. Rainbow trout collected during sampling efforts were analyzed using microsatellite DNA analysis for stock identification. Nei's genetic distance was used to measure the relationship between Cottonwood Creek rainbow trout and six other eastern Washington trout populations: two populations derived from plants of coastal rainbow trout, a population of cutthroat trout and three redband rainbow trout populations. Cottonwood Creek rainbow trout most closely resembled those from Buck Creek in the Spokane River drainage. The Buck Creek rainbow population is a coastal variety that was planted into Buck Creek from the Spokane Fish hatchery and subsequently began to naturally reproduce in the wild. Thus, it is probable that the Cottonwood Creek rainbow trout were derived from Spokane hatchery plants into Rock Lake that subsequently began to reproduce in the wild"--Document.

Book Assess Resident Fish Stocks

Download or read book Assess Resident Fish Stocks written by Mattie H. Allen and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project was to determine the level of genetic diversity and purity of 14 putative redband trout (Oncorhynchus mykiss gairdneri) populations within a fine-scale geographic region in the upper East Fork Owyhee River watershed of the Duck Valley Indian Reservation. Tissue samples from fin clips were collected by Tribal staff from the sample populations of redband/rainbow trout (Oncorhynchus mykiss spp.) and/or their hybrids; the Tribes subcontracted with University of Idaho’s Center for Salmonid and Freshwater Species at Risk for the genetic lab analysis (see Attachment 1 for their report). Sample populations were screened for detectable levels of introgressive hybridization arising from possible admixtures of hatchery-reared coastal rainbow trout (O.m. irideus) with native redband trout. Six of the 14 sampled populations show no indication of introgressive hybridization, indicating populations of native redband trout in these locations.

Book Hybridization Between Yellowstone Cutthroat Trout and Rainbow Trout in the Upper Snake River Basin Wyoming

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.