Download or read book Use of Dual frequency Identification Sonar to Verify Split beam Estimates of Salmon Flux and to Examine Fish Behaviour in the Fraser River written by Yunbo Xie and published by . This book was released on 2005 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salmonid Fisheries written by Paul Kemp and published by John Wiley & Sons. This book was released on 2011-06-13 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salmonid Fisheries is a landmark publication, concentrating on river management, habitat restoration and rehabilitation, disseminating lessons learnt in relation to the intensively studied salmonids that are applicable to future interventions, not just for salmonid species but for other non-salmonid species, biota and ecosystems. The contents of this book are the product of the Atlantic Salmon Trust’s 40th Anniversary Conference, held in association with the Game and Wildlife Conservation Trust. Drawing together carefully-edited contributions from many of the world leaders in river restoration from academia, commercial management and government agencies, this important book highlights the need to view river management from the context of the catchment and to adopt an ecosystem-based approach to restoration. The book is broadly divided into two sections which discuss first, the status of current understanding concerning the relationship between lotic habitat management, the response of salmonid fisheries and the theory of river restoration, and secondly, the application of this to habitat management and river restoration. Salmonid Fisheries is an extremely valuable work of reference for fisheries managers, ecologists, environmental scientists, fish biologists, conservation biologists and geomorphologists. Libraries in all universities and research establishments where biological and earth sciences, and fisheries management are studied or taught should have copies of this book on their shelves. Contributions from a wide range of well known experts Published in association with the Atlantic Salmon Trust Habitat management is crucial for dwindling wild salmon populations Of great importance to aquatic ecologists and fisheries managers
Download or read book Ecology of Salmonids in Estuaries around the World written by Colin D. Levings and published by UBC Press. This book was released on 2016-05-15 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: For centuries, biologists have marvelled at how anadromous salmonids – fish that pass from rivers into oceans and back again – survive as they migrate between these two very different environments. Yet, relatively little is understood about what happens to salmonid species (including salmon, steelhead, char, and trout) in the estuaries where they make this transition from fresh to salt water. This book explains the critical role estuaries play in salmonid survival. Ecology of Salmonids in Estuaries around the World synthesizes information from a vast array of literature, to describe the specific adaptation of eighteen anadromous salmonids in four genera (Hucho, Oncorhynchus, Salmo, and Salvelinus) explain the ecological relationships between anadromous salmonids, the fish they coexist with, and their estuarine habitat discuss key fitness elements salmonids need for survival (including those relating to osmoregulation, growth and feeding mechanisms, and biotic interactions) provide guidance on how to conduct estuarine sampling and scientific aspects of management and recovery plans offer directions for future research. The critical reference is further enhanced by extensive supplementary appendices that are available online, including data tables, additional references on estuarine salmonids, and a primer on estuaries and salmonids for citizen scientists.
Download or read book Workshop on Hydroacoustics for Salmon Management March 22 23 2006 Vancouver B C written by and published by . This book was released on 2007 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2008 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report written by Pacific Salmon Commission and published by . This book was released on 2005 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance of the Sockeye Salmon Escapement in the Alsek River Drainage 2004 written by and published by . This book was released on 2005 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility of Deploying a Dual frequency Identification Sonar DIDSON System to Estimate Salmon Spawning Ground Escapement in Major Tributary Systems of the Fraser River British Columbia written by John A. Holmes and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Feasibility of Using a Split beam Sonar to Estimate Salmon Passage on the Kenai River as a Potential Replacement for an Echo counting Bendix Sonar written by April V. Faulkner and published by . This book was released on 2007 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report discusses the results of estimating Pacific salmon abundance in the Kenai River in 2001-2003, using split-beam sonar technology.
Download or read book A Split beam Echosounder Perspective on Migratory Salmon in the Fraser River written by Yunbo Xie and published by . This book was released on 1997 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Feasibility of Deploying a Dual frequency Identification Sonar DIDSON System to Estimate Salmon Spawning Ground Escapement in Major Tributary Systems of the Fraser River British Columbia written by Canada. Dept. of Fisheries and Oceans and published by Nanaimo, B.C. : Fisheries and Oceans Canada. This book was released on 2005 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Feasibility of Using a Split beam Sonar to Estimate Salmon Passage on the Nushagak River as a Potential Replacement for an Echo counting Bendix Sonar written by Suzanne L. Maxwell and published by . This book was released on 2007 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report discusses the results of estimating Pacific salmon abundance in the Nushagak River, using split-beam sonar technology.
Download or read book Evaluation of a Dual frequency Imaging Sonar for Detecting and Estimating the Size of Migrating Salmon written by Debby L. Burwen and published by . This book was released on 2007 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments were conducted with a DIDSON (Dual frequency IDentification SONar) acoustic system to evaluate the potential for estimating fish size from images of tethered and free-swimming fish in two Alaskan rivers.
Download or read book Evaulating Error in Sockeye Salmon Abundance Estimates from Salmon Migrating Outside the Sonar Beam at the Yentna Cooper and Kenai Rivers written by Suzanne L. Maxwell and published by . This book was released on 2013 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonars (DIDSONs) are used at several sites in Alaska to assess Pacific salmon Oncorhynchys spp. escapement. This study examined one potential error source associated with this method, the number of fish migrating outside the ensonified region.
Download or read book Evaulating Error in Sockeye Salmon Abundance Estimates from Salmon Migrating Outside the Sonar Beam at the Yentna Cooper and Kenai Rivers written by Suzanne L. Maxwell and published by . This book was released on 2013 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dual-frequency identification sonars (DIDSONs) are used at several sites in Alaska to assess Pacific salmon Oncorhynchys spp. escapement. This study examined one potential error source associated with this method, the number of fish migrating outside the ensonified region.
Download or read book Assessment of Potential Bias in Hydroacoustic Estimation of Fraser River Sockeye and Pink Salmon at Mission B C written by Yunbo Xie and published by . This book was released on 2002 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Dual Frequency Identification Sonar to Determine Adult Chinook Salmon Oncorhynchus Tshawytscha Escapement in the Secesh River Idaho Annual Report January 2008 December 2008 written by and published by . This book was released on 2009 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chinook salmon in the Snake River basin were listed as threatened under the Endangered Species Act in 1992 (NMFS 1992). The Secesh River represents the only stream in the Snake River basin where natural origin (wild) salmon escapement monitoring occurs at the population level, absent a supplementation program. As such the Secesh River has been identified as a long term salmon escapement and productivity monitoring site by the Nez Perce Tribe Department of Fisheries Resources Management. Salmon managers will use this data for effective population management and evaluation of the effect of conservation actions on a natural origin salmon population. The Secesh River also acts as a reference stream for supplementation program comparison. Dual frequency identification sonar (DIDSON) was used to determine adult spring and summer Chinook salmon escapement in the Secesh River in 2008. DIDSON technology was selected because it provided a non-invasive method for escapement monitoring that avoided listed species trapping and handling incidental mortality, and fish impedance related concerns. The DIDSON monitoring site was operated continuously from June 13 to September 14. The first salmon passage was observed on July 3. DIDSON site total estimated salmon escapement, natural and hatchery fish, was 888 fish ± 65 fish (95% confidence interval). Coefficient of variation associated with the escapement estimate was 3.7%. The DIDSON unit was operational 98.1% of the salmon migration period. Adult salmon migration timing in the Secesh River occurred over 74 days from July 3 to September 14, with 5,262 total fish passages observed. The spawning migration had 10%, median, and 90% passage dates of July 8, July 16, and August 12, respectively. The maximum number of net upstream migrating salmon was above the DIDSON monitoring site on August 27. Validation monitoring of DIDSON target counts with underwater optical cameras occurred for species identification. A total of 860 optical camera identified salmon passage observations were identical to DIDSON target counts. However, optical cameras identified eight jack salmon (3 upstream, 5 downstream) less than 55 cm in length that DIDSON did not count as salmon because of the length criteria employed (e"55 cm). Precision of the DIDSON technology was evaluated by comparing estimated net upstream salmon escapement and associated 95% confidence intervals between two DIDSON sonar units operated over a five day period. The DIDSON 1 salmon escapement was 145.7 fish (± 2.3), and the DIDSON 2 escapement estimate was 150.5 fish (± 5). The overlap in the 95% confidence intervals suggested that the two escapement estimates were not significantly different from each other. Known length salmon carcass trials were conducted in 2008 to examine the accuracy of manually measured lengths, obtained using DIDSON software, on high frequency files at a 5 m window length. Linear regression demonstrated a highly significant relationship between known lengths and manually measured salmon carcass lengths (p
