Download or read book A Modeling Study of Changes in the Sacramento River Winter run Chinook Salmon Population Due to Climate Change written by Rosemarie Lingad Dimacali and published by . This book was released on 2013 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sacramento River Winter-run Chinook Salmon (salmon) populations are declining and have been classified as an endangered species since 1994. Populations are sensitive to water temperatures and flow, both of which have changed due to hydraulic operations, and may continue to change in response to climate change. The purpose of this study is to estimate changes in salmon populations in response to a hypothetical climate change scenario using computer models. For two hypothetical climate scenarios, flow data for California's water system have been simulated and made publicly available as part of Department of Water Resource's 2011 State Water Project Delivery Reliability Report. The climate scenarios are: (1) historical climate conditions, and (2) medium-to-high emissions and air temperature changes (a 2050 level of development, A2 greenhouse gas level of emissions). For this study, DWR's flow data, based on 80 years of historical hydrology, and the associated temperatures projected by the ECHAM-5 climate model were used to simulate water temperatures, salmon mortality rates, and salmon production in the upper Sacramento River between Keswick Dam and Red Bluff Dam. The models used in this study -- the Sacramento River Water Quality Model (SRWQM) and the Salmonid Population Model (SALMOD) -- are the same models used by the U.S. Department of Interior Bureau of Reclamation (USBR). SRWQM results show that climate change causes a 3 ̊F increase in maximum water temperatures. SALMOD results show water temperature changes affect the salmon population significantly more than flow. In typical years, calculated salmon mortalities were not changed significantly by climate change (CC). In contrast, when conditions were unfavorable, salmon mortalities were substantially higher under the CC scenario and these unfavorable conditions happened with greater frequency.
Download or read book Life Cycle Modeling Framework for Sacramento River Winter run Chinook Salmon written by Noble Hendrix and published by . This book was released on 2014 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this document, we describe a strategy for quantitatively evaluating how Federal Central Valley Project (CVP) and California State Water Project (SWP) management actions affect Central Valley Chinook salmon populations. Examples of management actions include changes in water project operations, addition or removal of barriers, and a variety of habitat restoration initiatives. The analytical framework consists of linking and applying hydrological, hydraulic, water quality, and salmon population models.
Download or read book Biological Opinion that Address the Potential Effects on Sacramento River Winter run Chinook Salmon from the Bureau of Reclamation s Proposed Los Vaqueros Project written by and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expansion of the Chinook Salmon Population Model to Encompass the Winter run Chinook in the Sacramento River written by and published by . This book was released on 1991 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Winter run Chinook Salmon in the Sacramento River California with Notes on Water Temperature Requirements at Spawning written by Daniel W. Slater and published by . This book was released on 1963 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salmon specialists throughout the Pacific Coast indicate that the winter-run Chinook salmon is restricted to California's Sacramento River system. The characteristics and habits of the race are unique in the following respects: Fresh-water holding period, December to April; spawning period, April into July. The up-migration is concurrent with the late segments of the fall run, but the adults are distinguishable by the green condition of the gonads. The down-migration is concurrent with that of the spring-run fry, but the migrants are 2-inch or larger fingerlings. Evidence is lacking to determine whether there is an earlier down-migration of fry. The race appears to hold great promise as a stock to be introduced into areas where May-August temperatures are 42.5 degrees - 57.5 degrees F., for it supports superb angling during the fresh-water holding period. Water temperatures in May through August are seen as the factor limiting the natural extension of the range of the race.
Download or read book Modeling Impacts of Multiple Stresses on Aquatic Ecosystems written by Jamie Donn Anderson and published by . This book was released on 2000 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimating the Effect of Changing Delta Environmental Conditions on Sacramento Basin Fall Run Chinook Salmon Stock written by Don W. Kelley and published by . This book was released on 1991 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Newhall Ranch Resource Management and Development Plan and Spineflower Conservation Plan written by and published by . This book was released on 2009 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Framework for Assessing Factors Influencing Endangered Sacramento River Winter run Chinook Salmon Oncorhynchus Tshawytscha Across the Life Cycle written by Sean Windell and published by . This book was released on 2017 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: California's Central Valley Interagency Ecology Program (IEP) formed multi-agency Salmon and Sturgeon Assessment of Indicators by Life Stage (SAIL) synthesis teams to develop a scientific framework for evaluating existing information on endangered Sacramento River winter-run Chinook salmon (SRWRC; Oncorhynchus tshawytscha), green sturgeon (Acipenser medirostris), and white sturgeon (A. transmontanus) and provide recommendations to improve the management value of life stage monitoring. Developing the SAIL framework for SRWRC and sturgeon followed parallel approaches that included three steps. First, existing conceptual models (CMs) were reviewed and modified to characterize specific environmental and management factors that drive SRWRC responses within discrete geographic domains and life stages. Second, the existing monitoring network was compared to fish demographic responses in the CMs to identify deficiencies. The deficiencies were interpreted as gaps in the existing network that prevent annual, quantitative, population-level metrics from being developed that are needed to support water management actions, assess population viability, and prioritize population recovery actions among geographic domains across the freshwater landscape. Lastly, identified absences were used to develop recommendations on ways to improve the scientific and management value of the current monitoring network. This document comprises the first of these steps for the SRWRC portion of the SAIL projects. It consolidates all the CMs developed by the SAIL synthesis team and their associated narratives. [doi:10.7289/V5/TM-SWFSC-586(http://doi.org/10.7289/V5/TM-SWFSC-586)]
Download or read book Winter Run Chinook Salmon in the Sacramento River California With Notes on Water Temperature Requirements at Spawning Classic Reprint written by Daniel W. Slater and published by Forgotten Books. This book was released on 2016-08-02 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Winter-Run Chinook Salmon in the Sacramento River, California, With Notes on Water Temperature Requirements at Spawning Since water of Battle Creek, on which Cole man Hatchery is located, is too warm for winter-run fish, those trapped at Keswick Dam (table 2) are now hauled to Spawning areas in the main Sacramento River down stream from Redding; no other suitable water is available for them. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The Relationship Between Instream Flow Adult Immigration and Spawning Habitat Availability for Fall run Chinook Salmon in the Upper San Joaquin River California Final Report written by and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biological Assessment written by Randall L Brown and published by . This book was released on 1992 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft Biological Assessment written by Randall L. Brown and published by . This book was released on 1992 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recommendations for the Recovery of the Sacramento River Winter run Chinook Salmon written by Sacramento River Winter-run Chinook Salmon Recovery Team and published by . This book was released on 1996 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Restoring Ecological Function by Mimicking Natural Processes written by Jacob Van Epen Katz and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1: Impending extinction of salmon, steelhead, and trout (Salmonidae) in California. California contains the southernmost native populations of most Pacific Coast salmon and trout, many of which appear to be rapidly headed toward extinction. A quantitative protocol was developed to determine conservation status of all salmonids native to the state. Results indicate that if present trends continue, 25 (78%) of the 32 taxa native to California will likely be extinct or extirpated within the next century, following the bull trout (Salvelinus confluentus), which was extirpated in the 1970s. California's salmonids are adapted to living in a topographically diverse region with a Mediterranean climate, characterized by extreme seasonal and inter-annual variability in streamflow. Consequently, California salmonids have evolved extraordinary life history diversity to persist in the face of stressful conditions that often approach physiological limits. The spatial distributions of California salmonids vary from wide-ranging anadromous forms to endemic inland forms persisting in only a few kilometers of stream. Eighty-one percent of anadromous taxa are threatened with extinction and 73% inland taxa are either threatened or already extinct. Although specific drivers of decline differ across species, major causes of decline are related to increasing competition with humans for water, human degradation of watersheds, and adverse effects of hatchery propagation. Climate change, interacting with the other causes of decline, is increasing the trajectory towards extinction for most populations. Bringing all of California's salmonid fishes back from the brink of extinction may not be possible. If there are bold changes to management policy, however, self-sustaining populations of many species may be possible due to their inherent ability to adapt to changing conditions. Chapter 2: Floodplain Farm Fields Provide Novel Rearing Habitat for Chinook Salmon. When inundated by floodwaters, river floodplains provide rich food resources and high quality habitat for many species of wildlife. Globally, many rivers have been leveed and floodplain wetlands drained, primarily for flood control and conversion to agriculture. In the Central Valley of California, USA, where less than 5% of floodplain wetland habitats remain, a critical conservation question is how farmlands located on floodplains can be managed to provide increased habitat benefit to fish and wildlife. In this study agricultural fields located on the Sacramento River floodplain were intentionally inundated after the autumn rice harvest to mimic natural floodplain inundation patterns and determine if they could provide shallow-water rearing habitat for imperiled Sacramento River fall-run Chinook salmon (Oncorhynchus tshawytscha). Approximately 10,000 juvenile fish were reared on two hectares for six weeks when fields were idle between fall harvest and spring planting. Growth rates of juvenile salmon (average 0.76 mm/day) reared in this surrogate floodplain habitat were among the most rapid ever documented in fresh water in California and survival was high (minimum estimated survival 57%). The apparent compatibility of crop production and fish and wildlife habitat on the same ground demonstrates the ecological and economic benefits of reconciling management of agricultural working landscapes with recovery of native species. Chapter 3: Managed Inundation of Agricultural Floodplains Produces Record Growth in Juvenile Chinook Salmon. Floodplains are important engines of seasonal productivity in river ecosystems. However, in North America and Europe over 90% of floodplains habitats are no longer hydrologically connected to rivers, representing a significant loss of riverine ecosystem food web productivity. Expanding inundated floodplain area increases the volume of the photic zone, the uppermost portion of the water column, where sunlight is converted to carbohydrates by phytoplankton. Greater extent of shallow floodplain augments overall food availability and provides important aquatic habitats for many species. For example, invertebrates are in greater abundance on floodplains than in adjacent river channels, enhancing foraging success of fish that gain access to these seasonally inundated aquatic habitats. Like many large river valleys globally, the Central Valley of California, USA, (encompassing the Sacramento and San Joaquin River watersheds) has lost the majority of its floodplain habitat, primarily to conversion to agriculture. However, remnant floodplains still exist and are managed as flood bypasses which function in the winter wet season as "pressure relief valves," allowing floodwaters to pass safely around vital infrastructure and urban areas. In the summer dry season, bypasses are actively farmed. Managed inundation of agricultural floodplains may offer a means of regaining some of the ecological benefits of floodplains for native fish and wildlife while continuing to support flood protection and production agriculture, thereby creating a landscape where native species and human uses can coexist. An example of such reconciliation is Yolo Bypass, a farmed floodway where two decades of managed winter inundation of post-harvest rice fields--in the agricultural off-season when farm fields are idle--creates wetland habitat for millions of waterfowl using the critically important Pacific Flyway. Recent studies have shown that managed inundation can also provide suitable floodplain foraging habitat for native fish species such as juvenile Chinook Salmon. In order to better understand how rice farming practices affect the quality of reconciled winter rearing habitat for juvenile fall run Chinook Salmon (Oncorhynchus tshawytscha), we built and experimentally manipulated nine replicated two-acre rice fields. Fields shared a common layout and water source. Each was randomly assigned to one of three post-harvest farming options generally used in the Yolo Bypass; fallow, leaving standing rice stubble, or tilling to incorporate the stubble into the soil. Each field was stocked with approximately 4,500 juvenile salmon. Weekly sampling for water quality, invertebrate abundance and diversity, and fish growth and survival was conducted for 6 weeks, after which fields were drained and fish counted, measured
Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Robert F. Raleigh and published by . This book was released on 1986 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sacramento River Spring run Chinook Salmon Biennial Report written by and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
