Results 21 to 30 of about 427,817 (162)

Losses of Sacramento River Chinook Salmon and Delta Smelt to Entrainment in Water Diversions in the Sacramento–San Joaquin Delta

open access: yesSan Francisco Estuary and Watershed Science, 2008
Pumping at the water export facilities in the southern Sacramento-San Joaquin Delta kills fish at and near the associated fish-salvage facilities.
Wim J. Kimmerer
doaj   +1 more source

Modeling Delta Smelt Distribution for Hypothesized Swimming Behaviors [PDF]

open access: yes, 2021
Delta Smelt, Hypomesus transpacificus, is an endangered pelagic fish native to the San Francisco Estuary. The distribution of Delta Smelt in the estuary shifts landward from low-salinity habitat to freshwater habitat before spawning.
Bever, Aaron J.   +5 more
core   +1 more source

Use of affinity analysis to guide habitat restoration and enhancement for the imperiled delta smelt

open access: yesEndangered Species Research, 2020
Habitat restoration efforts in the upper San Francisco Estuary, including the Sacramento-San Joaquin Delta, California, move forward, despite a paucity of information on the environmental requirements of many targeted species.
Hamilton, SA, Murphy, DD
doaj   +1 more source

Assessing the distribution and abundance of larval Longfin Smelt: What can a larval monitoring program tell us about the distribution of a rare species?

open access: yesCalifornia Fish and Wildlife Journal, 2021
Following its listing as threatened under the California Endangered Species Act in 2009, Longfin Smelt (Spirinchus thaleichthys) became a focus of resource managers in the San Francisco Estuary.
Michael Eakin
doaj   +1 more source

Foraging and metabolic consequences of semi-anadromy for an endangered estuarine fish. [PDF]

open access: yesPLoS ONE, 2017
Diadromy affords fish access to productive ecosystems, increasing growth and ultimately fitness, but it is unclear whether these advantages persist for species migrating within highly altered habitat.
Bruce G Hammock   +8 more
doaj   +1 more source

Identifying Environmental Factors Limiting Recovery of an Imperiled Estuarine Fish

open access: yesFrontiers in Ecology and Evolution, 2022
Correctly identifying the environmental factors that limit population growth and recovery of imperiled species is an essential element of any targeted conservation program.
Scott A. Hamilton, Dennis D. Murphy
doaj   +1 more source

Understanding the Extent of Hyperactivity and Related Behavioral Alterations in Delta Smelt and Longfin Smelt [PDF]

open access: yes, 2022
Agricultural and urban contaminants enter aquatic environments at concentrations that can affect a variety of sublethal endpoints, including organismal behavior, which can in turn lead to impacts at the population level. The San Francisco Bay Delta (SFBD)
Patullo, Caitlyn Elaine
core   +1 more source

Identifying the environmental conditions that determine the distribution of an endangered estuarine fish to manage risk of entrainment

open access: yesFrontiers in Ecology and Evolution
Allocation of scarce water resources to meet beneficial but competing end uses has become commonplace in drought-stricken western North America. In the Sacramento-San Joaquin Delta in California, regulatory agencies endeavor to protect the endemic and ...
Scott A. Hamilton   +2 more
doaj   +1 more source

Vital dye immersion evaluations with juvenile delta smelt

open access: yesAquaculture, Fish and Fisheries, 2023
Immersion‐based vital dyes were tested as a marking method for use in larval smelt mark–recapture studies. We assessed five fluorescent dyes as a mark for juvenile osmerids: 4‐Di‐1‐ASP, BODIPY FL C12, BODIPY 505/515, Nile red, and calcein.
Virginia Afentoulis   +5 more
doaj   +1 more source

Evaluation of a large-scale flow manipulation to the upper San Francisco Estuary: Response of habitat conditions for an endangered native fish

open access: yesPLoS ONE, 2020
While flow is known to be a major driver of estuarine ecosystems, targeted flow manipulations are rare because tidal systems are extremely variable in space and time, and because the necessary infrastructure is rarely available.
Ted Sommer   +10 more
doaj   +2 more sources

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