Download or read book Spawning Habitat Characteristics and Natural Recruitment of Rainbow Trout Oncorhynchus Mykiss and Brown Trout Salmo Trutta Manzanita Lake Lassen Volcanic National Park California written by Kerrie A. Pipal and published by . This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Tributary Potential for Wild Rainbow Trout Recruitment in Hebgen Reservoir Montana written by Darin Allen Watschke and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trout fisheries in Montana reservoirs are almost entirely maintained by stocking hatchery fish. An exception is Hebgen Reservoir, where wild rainbow trout Oncorhynchus mykiss were established in 1979. Continued, unexpectedly low gill net catch rates of rainbow trout led to the objective of this study, which was to assess tributary production of wild rainbow trout and identify potential limiting factors. A combination of redd surveys, adult, young-of-the-year (YOY; age-0), and juvenile (age- 1 and age-2) trapping, and measurements of water temperature and spawning and rearing habitat was used to assess spawning use and habitat characteristics of 11 tributaries, comprising 170 stream kilometers, in 2002 and 2003. A total of 5,642 redds were counted, suggesting the number of spawners was not limiting. Redd occurrence within individual habitat units was positively associated with spawning gravel densities, and negatively associated with rearing habitat density. At the tributary scale, redd abundance was positively associated with availability of both spawning and rearing habitat. Temperature also appeared to influence spawning as most production occurred in tributaries with May to July temperature averaging 8 to 10 .C. The majority (80%) of spawning occurred in only two of the 11 tributaries (Duck Creek and the South Fork of the Madison River). These tributaries contained a combination of abundant spawning and rearing habitat. Rainbow trout YOY production estimates exceeded 4.7 million in 2002 and 2003 combined and abundant YOY and age-1 and age-2 juvenile rainbow trout were captured during spring and summer outmigrations in two lake tributaries. Estimates of available spawning (7.0 ha) and rearing habitat (1.1 x 106 m3) suggest that tributary habitat does not limit the rainbow trout population of Hebgen Reservoir from reaching a self-sustaining level that would meet the recreational requirements of the sport fishery. However, high densities of YOY and juvenile brown trout Salmo trutta captured during outmigrant trapping of rainbow trout suggests that competition and predation may be affecting overwinter survival of rainbow trout in the tributaries. Protection and enhancement of tributary habitat in other reservoirs offers the potential for greater use of wild trout for maintenance of trout fisheries in lentic systems.

Download or read book Habitat Suitability Information written by and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Responses of Rainbow Oncorhynchus Mykiss and Brown Trout Salmo Trutta to Creation of Access Into a Spawning Tributary written by Scott Irven Snelson and published by . This book was released on 1996 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physical Habitat Factors Influencing the Distribution and Abundance of Rainbow Trout and Brown Trout in the Little Truckee River written by Jeffrey Lynn Kershner and published by . This book was released on 1991 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Spawning and Rearing Habitats of Rainbow Trout and Brown Trout in Two Rivers in Montana written by Steven Kent Sando and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lake Roosevelt Rainbow Trout Habitat written by and published by . This book was released on 2004 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The construction of Chief Joseph and Grand Coulee Dams completely and irrevocably blocked anadromous fish migrations to the Upper Columbia River. Historically this area hosted vast numbers of salmon returning to their natal waters to reproduce and die. For the native peoples of the region, salmon and steelhead were a principle food source, providing physical nourishment and spiritual sustenance, and contributing to the religious practices and the cultural basis of tribal communities. The decaying remains of spawned-out salmon carcasses contributed untold amounts of nutrients into the aquatic, aerial, and terrestrial ecosystems of tributary habitats in the upper basin. Near the present site of Kettle Falls, Washington, the second largest Indian fishery in the state existed for thousands of years. Returning salmon were caught in nets and baskets or speared on their migration to the headwater of the Columbia River in British Columbia. Catch estimates at Kettle Falls range from 600,000 in 1940 to two (2) million around the turn of the century (UCUT, Report No. 2). The loss of anadromous fish limited the opportunities for fisheries management and enhancement exclusively to those actions addressed to resident fish. The Lake Roosevelt Rainbow Trout Habitat/Passage Improvement Project is a mitigation project intended to enhance resident fish populations and to partially mitigate for anadromous fish losses caused by hydropower system impacts. This substitution of resident fish for anadromous fish losses is considered in-place and out-of-kind mitigation. Upstream migration and passage barriers limit the amount of spawning and rearing habitat that might otherwise be utilized by rainbow trout. The results of even limited stream surveys and habitat inventories indicated that a potential for increased natural production exists. However, the lack of any comprehensive enhancement measures prompted the Upper Columbia United Tribes Fisheries Center (UCUT), Colville Confederated Tribes (CCT), Spokane Tribe of Indians (STI) and Washington Department of Fish and Wildlife (WDFW) to develop and propose a comprehensive fishery management plan for Lake Roosevelt. The Rainbow Trout Habitat/Passage Improvement Project (LRHIP) was designed with goals directed towards increasing natural production while maintaining genetic integrity among current tributary stocks. The initial phase of the Lake Roosevelt Habitat Improvement Project (Phase I, baseline data collection: 1990-91) was focused on the assessment of limiting factors, including the quality and quantity of available spawning gravel, identification of passage barriers, and assessment of other constraints. After the initial assessment of stream parameters, five streams meeting specific criteria were selected for habitat/passage improvement projects (Phase II, implementation -1992-1995). Four of these projects were on the Colville Indian Reservation South Nanamkin, North Nanamkin, Louie and Iron Creeks and one Blue Creek was on the Spokane Indian Reservation. At the completion of project habitat improvements, the final phase (Phase III, monitoring-1996-2000) began. This phase assessed the changes and determined the success achieved through the improvements. Data analysis showed that passage improvements are successful for increasing habitat availability and use. The results of in-stream habitat improvements were inconclusive. Project streams, to the last monitoring date, have shown increases in fish density following implementation of the improvements. In 2000 Bridge Creek, on the Colville Reservation was selected for the next phase of improvements. Data collection, including baseline stream survey and population data collection, was carried out during 2001 in preparation for the design and implementation of stream habitat/passage improvements. Agencies cooperating on the project include the Colville Confederated Tribes (CCT), Natural Resource Conservation Service (NRCS, Ferry County District), Ferry County Conservation District, and Ferry County. The Bonneville Power Administration (BPA) provided project funding support and program integration assistance. A stock of redband rainbow trout, were discovered in 2001 in an isolated section of Bridge Creek above a set of waterfalls. DNA microsatellite analysis was conducted at the University of Idaho and indicated that very little if any hybridization. The targeted species in the genetic analysis was red band/rainbow trout (Oncorhynchus mykiss spp.). The sub-contract is with Madison Powell and Joyce Faler at the Center for Salmonid and Freshwater Species at Risk at the University of Idaho/HFCES. DNA analysis used mitochondrial and nuclear RFLP markers along with two microsatellite loci. Sample populations were screened for detectable levels of introgressive hybridization arising from possible admixtures of hatchery coastal rainbow trout with native red band trout.

Download or read book An Evaluation of Lake Trout Spawning Habitat Characteristics and Methods for Their Detection written by Canada. Department of Fisheries and Oceans and published by Burlington, Ont. : Fisheries and Oceans, Canada. This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spawning Interactions of Hatchery and Naturalized Anadromous Form Rainbow Trout Oncorhynchus Mykiss in a Lake Superior Tributary written by Tracy L. Close and published by . This book was released on 1999 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution and Microhabitat Use of Drift feeding Rainbow Oncorhynchus Mykiss and Brown Trout Salmo Trutta and Their Relationship to Cover in a Spring Creek written by Rebecca L. Bernard and published by . This book was released on 1997 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Translocation of Brown Trout salmo Trutta and Rainbow Trout oncorhynchus Mykiss Into and Within Western Australia written by Western Australia Fisheries Department and published by . This book was released on 2002 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Requirements and Tolerances of Rainbow Trout Oncorhynchus Mykiss and Brown Trout Salmo Trutta with Special Reference to Western Australia written by Brett Molony and published by . This book was released on 2001 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physical and Water quality Characteristics Affecting Trout spawning Habitat in the Quashnet River Cape Cod Massachusetts written by Yvonne Halpern Baevsky and published by . This book was released on 1991 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Brown Trout Salmo Trutta and Rainbow Trout Oncorhynchus Mykiss written by Srecko Leiner and published by . This book was released on 1992 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rainbow Trout and Brown Trout written by Craig Lawrence and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natural siltation of brown trout Salmo trutta L spawning gravels during low flow conditions written by P A. Carling and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lake Roosevelt Rainbow Trout written by and published by . This book was released on 1999 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lake Franklin D. Roosevelt was created with the completion of the Grand Coulee Dam in 1942. The lake stretches 151 miles up-stream to the International border between the United States and Canada at the 49th parallel. Increased recreational use, subsistence and sport fishing has resulted in intense interest and possible exploitation of the resources within the lake. Previous studies of the lake and its fishery have been limited. Early studies indicate that natural reproduction within the lake and tributaries are not sufficient to support a rainbow trout (Onchoryhnchus mykiss) fishery (Scholz et. al., 1988). These studies indicate that the rainbow trout population may be limited by lack of suitable habitat for spawning and rearing (Scholz et. al., 1988). The initial phase of this project (Phase I, baseline data collection) was directed at the assessment of limiting factors such as quality and quantity of available spawning gravel, identification of passage barriers, and assessment of other limiting factors. Population estimates were conducted using the Seber/LeCren removal/depletion method. After the initial assessment of stream parameters, several streams were selected for habitat/passage improvement projects (Phase II, implementation). At the completion of project habitat improvements, the final phase (Phase III, monitoring) began. This phase will assess changes and gauge the success achieved through the improvements. The objective of the project is to correct passage barriers and improve habitat conditions of selected tributaries to Lake Roosevelt for adfluvial rainbow trout that utilize tributary streams for spawning and rearing. Streams with restorable habitats were selected for improvements. Completion of improvement efforts should increase the adfluvial rainbow trout contribution to the resident fishery in Lake Roosevelt. Personnel of three co-operating agencies, the Confederated Tribes of the Colville Reservation (CCT), the Spokane Tribe of Indians (STI) and the Washington Department of Fish and Wildlife initiated the project fieldwork in 1990. Phase II included only the Confederated Tribes of the Colville Reservation and the Spokane Tribe of Indians. Phase III is being done by the Confederated Tribes of the Colville Reservation.