Movement And Survival Of Juvenile Chinook Salmon In Californias Central Calley PDF Download
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Author | : Gabriel P. Singer |
Publisher | : |
Total Pages | : |
Release | : 2019 |
Genre | : |
ISBN | : 9781658413169 |
Download Movement and Survival of Juvenile Chinook Salmon in California's Central Calley Book in PDF, ePub and Kindle
Riverine ecosystems around the world have undergone extensive anthropogenic alterations, often to the detriment of native aquatic biodiversity. Migratory fishes are particularly vulnerable to habitat fragmentation and degradation. For example, Chinook Salmon populations in the Sacramento and San Joaquin Rivers, CA have been declining for nearly a century. Its Mediterranean climate, position in a landscape dominated by urban and agricultural land use, and the presence of an inland delta that serves as the hub of California's vast water conveyance system, makes this a particularly perilous region for migrating juvenile salmon. These studies use acoustic telemetry as tool to investigate survival and routing of juvenile fall and spring-run Chinook salmon during their riverine and estuarine migratory phases in the Sacramento and San Joaquin Rivers. Survival to the ocean in these river systems is already lower relative to other Chinook Salmon populations in North American. Tracking studies included investigations of the sub-lethal effects of tagging fish with acoustic transmitters, movement ecology and survival of two distinct evolutionary significant units of Chinook Salmon during an historic drought, and the movement ecology and survival of a reintroduced population of Chinook Salmon in the San Joaquin River.
Author | : Ayesha Gray PhD |
Publisher | : Archway Publishing |
Total Pages | : 94 |
Release | : 2022-03-08 |
Genre | : Juvenile Nonfiction |
ISBN | : 1665711205 |
Download Who’s Coming Home? Book in PDF, ePub and Kindle
Every year in the foothill streams of California’s Sierra Nevada mountains, young, wild salmon emerge from rock nests, and at different times, begin migration down the river to the Central Valley and ultimately the Pacific Ocean. Their strategies are to leave at different sizes and times during the spring. These small fish, some very small, face many challenges and obstacles as they battle to reach the sea. Their life’s mission: get big and return to their birthplace to mate. But which way out gets them home? Based on one of the author’s scientific publications, and illustrated by her, this rhyming picture book for children explains the juvenile salmon journey and answers the question of which out-migration strategy works. Informative and entertaining, Who’s Coming Home? introduces kids to science and how to answer questions about nature using it.
Author | : Natalie N McNair |
Publisher | : |
Total Pages | : |
Release | : 2015 |
Genre | : |
ISBN | : |
Download An Analysis of Juvenile Chinook Salmon Outmigration Speed and Survival in Response to Habitat Features: Sacramento River from Knights Landing to Sacramento, California Book in PDF, ePub and Kindle
Outmigration is an important life stage for Chinook salmon (Oncorhynchus tshawytscha) survival in the Sacramento River, and yet our understanding of their behavior and needs during this time is limited. To gain a better understanding of their survival and movement rates during outmigration, late fall run Chinook salmon smolts were tracked using acoustic telemetry techniques. Habitat features were measured and quantified throughout the study area to evaluate how Chinook salmon respond to key levee features including shade, instream woody material, and aquatic vegetation. The overall average movement speed through the entire study area was 0.77 m/s with an overall survival of 86%. Based on multiple linear regressions, vegetation was found to have the largest effect on speed with fish slowing down with increased vegetation cover. Shade, river mile, and velocity also had significant effects on movement speeds, but instream woody material was not significant. The result for woody material was surprising since it was anticipated to have a large impact on movement speeds. A positive correlation was found between faster fish movement speeds and higher survival. No evidence of diel movement patterns was found after releasing the fish. These finding can help managers create sites better designed to help Chinook salmon in the Sacramento River system. Results from this paper indicate that the type of woody material being installed might not be appropriate for this life stage of salmon.
Author | : Ayesha Gray |
Publisher | : Archway Publishing |
Total Pages | : 94 |
Release | : 2022-03-08 |
Genre | : |
ISBN | : 9781665711197 |
Download Who's Coming Home? Book in PDF, ePub and Kindle
Every year in the foothill streams of California's Sierra Nevada mountains, young, wild salmon emerge from rock nests, and at different times, begin migration down the river to the Central Valley and ultimately the Pacific Ocean. Their strategies are to leave at different sizes and times during the spring. These small fish, some very small, face many challenges and obstacles as they battle to reach the sea. Their life's mission: get big and return to their birthplace to mate. But which way out gets them home? Based on one of the author's scientific publications, and illustrated by her, this rhyming picture book for children explains the juvenile salmon journey and answers the question of which out-migration strategy works. Informative and entertaining, Who's Coming Home? introduces kids to science and how to answer questions about nature using it.
Author | : U.S. Department of the Interior |
Publisher | : CreateSpace |
Total Pages | : 36 |
Release | : 2014-03-30 |
Genre | : Nature |
ISBN | : 9781497346291 |
Download Distribution and Joint Fish-Tag Survival of Juvenile Chinook Salmon Migrating Through the Sacramentro-San Joaquin River Delta, California, 2008 Book in PDF, ePub and Kindle
Chinook salmon in California's Central Valley were decimated in the 19th and 20th centuries by overfishing, dam construction, channelization, population, and water diversions.
Author | : Randall L. Brown |
Publisher | : |
Total Pages | : 380 |
Release | : 2001 |
Genre | : Fishery management |
ISBN | : |
Download Contributions to the Biology of Central Valley Salmonids: Chinook salmon in the lower American River, California's largest urban stream Book in PDF, ePub and Kindle
Author | : Anna Edith Steel |
Publisher | : |
Total Pages | : |
Release | : 2015 |
Genre | : |
ISBN | : 9781321807394 |
Download Movements of Juvenile Chinook Salmon in the Sacramento Watershed, California Book in PDF, ePub and Kindle
Juvenile Chinook salmon (Oncorhynchus tshawytscha) experience high rates of mortality as they out-migrate, frequently navigating through rivers heavily modified by human activities. Understanding patterns of movement and survival is key to informing management decisions in these human-dominated aquatic systems. Ultrasonic telemetry is a valuable tool allowing us to observe the movement patterns of aquatic animals. The first chapter of this dissertation examines the performance of an ultrasonic telemetry positioning system by comparing receiver arrays deployed in three diverse environments. It suggests that researchers utilizing a positioning system should focus on testing the geometry of receivers before the study begins, as well as minimizing receiver movements and maximizing the accuracy of speed-of-sound estimates. The second chapter uses an ultrasonic positioning system to observe the route selection of juvenile out-migrants at an artificial juncture in the tidal portion of the Sacramento River, California. The strongest predictor of ultimate migratory route was the relative water velocity at the river's junction with the water diversion channel. The third chapter describes patterns in survival through a segment of the lower Sacramento River. We applied a previously derived analytical model, the mean free-path length model, in a new way to determine whether predator densities or prey behaviors were more indicative of fine-scale mortality rates. The model indicated that the hatchery smolt were highly directional in their outmigration behavior, leading us to conclude that spatial patterns in survival of juvenile Chinook were driven by increasing density or efficiency of the predator community. Ultrasonic telemetry technologies can be valuable in habitats where direct observation of animals is difficult, including in large river systems such as the Sacramento River. Through the continuing advancement of these technologies, their careful application, and the appropriate union of empirical data and modeling approaches, we can provide valuable information about the movements and mortality patterns of species of conservation concern.
Author | : Cyril J. Michel |
Publisher | : |
Total Pages | : 260 |
Release | : 2010 |
Genre | : |
ISBN | : |
Download River Estuarine Survival and Migration of Yearling Sacramento River Chinook Salmon (Oncorhynchus Tshawytscha) Smolts and the Influence of Environment Book in PDF, ePub and Kindle
Author | : Joe Holmberg |
Publisher | : |
Total Pages | : 114 |
Release | : 1972 |
Genre | : Chinook salmon |
ISBN | : |
Download Salmon in California Book in PDF, ePub and Kindle
Author | : Colby Hause |
Publisher | : |
Total Pages | : 0 |
Release | : 2020 |
Genre | : |
ISBN | : |
Download Outmigration Survival of Juvenile Spring-run Chinook Salmon in Relation to Physicochemical Conditions in the San Joaquin River Book in PDF, ePub and Kindle
Extirpation of Central Valley spring-run Chinook salmon ESU (Oncorhynchus tshawytscha) from the San Joaquin River is emblematic of salmonid declines across the Pacific Northwest. Previous telemetry studies monitoring reintroduction of threatened spring-run Chinook salmon to the San Joaquin River revealed low out-migration survival of juveniles from rehabilitated upriver habitats to the ocean. To evaluate the link between overall habitat conditions and survivorship, we combined state-of-the-art habitat mapping approaches (Fast Automated Limnological Measurements or "FLAMe") with classic acoustic telemetry technology along the 270 km emigration corridor in Spring of 2019. We used classification algorithms on FLAMe data to develop a zonation scheme for aquatic habitats along the mainstem San Joaquin River, including a portion of the Delta. Despite elevated flow conditions in 2019, outmigration survival of smolts was again comparatively low (5%). However, our habitat-based classification scheme described variation in survival of acoustic-tagged juvenile spring-run Chinook salmon better than other candidate models based on geography or distance. Two regional mortality sinks were evident along the water quality transect, revealing poor survival in areas with higher temperatures and low levels of chlorophyll-[alpha], fDOM, and turbidity. These findings illustrate an overall value in integrating simple classification frameworks to improve our understanding of habitat variation on survival dynamics of imperiled salmonid populations.