Author: Jason G. RominePublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Regional Salmon Outmigration Study :.
Author: Jason G. RomineThe Regional Salmon Outmigration Study?survival and Migration Routing of Juvenile Chinook Salmon in the Sacramento-San Joaquin River Delta During the Winter of 2008?09
Author: U.S. Department Of The InteriorPublisher: CreateSpace
ISBN: 9781497419070
Category :
Languages : en
Pages : 44
Book Description
Juvenile Chinook salmon (Oncorhynchus tshawytscha) emigrating from natal tributaries of the Sacramento River may use a number of migration routes to navigate the Sacramento-San Joaquin River Delta (hereafter called "the Delta"), each of which may influence their probability of surviving. We applied a mark-recapture model to data from acoustically tagged juvenile late fall-run Chinook salmon that migrated through the Delta during the winter of 2008-09 to estimate route entrainment, survival, and migration times through the Delta.
The Regional Salmon Outmigration Study
Author: Jason G. RominePublisher:
ISBN:
Category : Chinook salmon fisheries
Languages : en
Pages : 36
Book Description
An Analysis of Juvenile Chinook Salmon Outmigration Speed and Survival in Response to Habitat Features: Sacramento River from Knights Landing to Sacramento, California
Author: Natalie N McNairPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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.
Outmigration Survival of Juvenile Spring-run Chinook Salmon in Relation to Physicochemical Conditions in the San Joaquin River
Author: Colby HausePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
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.
Salmon in California
Author: Joe HolmbergPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 114
Book Description
Atlantic Salmon in Maine
Author: National Research CouncilPublisher: National Academies Press
ISBN: 0309166586
Category : Technology & Engineering
Languages : en
Pages : 304
Book Description
Because of the pervasive and substantial decline of Atlantic salmon populations in Maine over the past 150 years, and because they are close to extinction, a comprehensive statewide action should be taken now to ensure their survival. The populations of Atlantic salmon have declined drastically, from an estimated half million adult salmon returning to U.S. rivers each year in the early 1800s to perhaps as few as 1,000 in 2001. The report recommends implementing a formalized decision-making approach to establish priorities, evaluate options and coordinate plans for conserving and restoring the salmon.
Physiological Aspects of Imprinting and Homing Migration in Salmon: Emerging Research and Opportunities
Author: Ueda, HiroshiPublisher: IGI Global
ISBN: 1799820564
Category : Technology & Engineering
Languages : en
Pages : 160
Book Description
Salmon are one of the most popular and commonly eaten fish and are among the most important fishery resources in the world. They are born and die in fresh water but can live in both fresh water and seawater where they migrate between rivers and oceans, showing amazing abilities to home to their natal stream precisely. However, their dynamic life cycles and mysterious abilities of natal stream imprinting and homing migration are not well understood. Physiological Aspects of Imprinting and Homing Migration in Salmon: Emerging Researches and Opportunities is a pivotal reference source that introduces the dynamic and complicated life cycle of salmon connected with fish migration and climate changes and presents physiological mechanisms of natal stream imprinting and homing in salmon with special references to hormone, olfaction, memory, and behavior. Additionally, salmon resources concerning salmon commercial fisheries, aquaculture, and global propagation systems are discussed. This book is ideally designed for ichthyologists, environmentalists, pisciculture professionals, fisheries, marine biologists, scientists, researchers, academicians, and students seeking coverage on one of the most integral species of fish in the world.
Snohomish River Juvenile Salmon Outmigration Study 1987
Author: David A. BeauchampPublisher:
ISBN:
Category : Pacific salmon
Languages : en
Pages :
Book Description
Snohomish River Juvenile Salmon Outmigration Study 1986
Author: David A. BeauchampPublisher:
ISBN:
Category : Pacific salmon
Languages : en
Pages :
Book Description