Results 41 to 50 of about 813 (188)

Liver Glycogen as a Sensitive Indicator of Food Limitation in Delta Smelt

open access: yesEstuaries and Coasts, 2023
Abstract Assessing habitat quality is a major goal of conservationists and restoration practitioners, but to associate habitat quality with biomarkers of vagile animals, the biomarkers must respond rapidly. Here, we identified a biomarker capable of rapidly detecting food limitation in the imperiled Delta Smelt (
Tena Dhayalan   +7 more
openaire   +1 more source

Histopathological assessment of seven year-classes of Delta Smelt

open access: yesScience of The Total Environment, 2020
The Delta Smelt (Hypomesus transpacificus) is an imperiled, annual fish endemic to the Sacramento-San Joaquin Delta and San Francisco Estuary. This study examined the severity and prevalence of liver and gill lesions of juvenile through adult Delta Smelt from 2011 through 2017 collected from five regions throughout its habitat (n = 1,053).
Swee J. Teh   +7 more
openaire   +3 more sources

Wakasagi in the San Francisco Bay–Delta Watershed: Comparative Trends in Distribution and Life-History Traits with Native Delta Smelt [PDF]

open access: yes, 2022
Intentional introductions of non-native fishes can have severe consequences on native communities. Wakasagi (Hypomesus nipponensis, referred to as Japanese Pond Smelt) are native to Japan and were once separated from their non-native congener the ...
Lewis, Levi S.   +9 more
core   +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

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  

A Qualitative Comparison of Spawning Behavior between Cultured and Wild Delta Smelt (Hypomesus transpacificus) [PDF]

open access: yes, 2023
For many imperiled species, comparisons between wild and cultured populations are invaluable for informing conservation measures, though opportunities to do so may be rare.
Carson, Evan W.   +4 more
core   +1 more source

Linking Hydrodynamic Complexity to Delta Smelt (Hypomesus transpacificus) Distribution in the San Francisco Estuary, USA [PDF]

open access: yes, 2016
Long-term fish sampling data from the San Francisco Estuary were combined with detailed three-dimensional hydrodynamic modeling to investigate the relationship between historical fish catch and hydrodynamic complexity.
Herbold, Bruce   +4 more
core   +1 more source

Assessing captive spawning strategies for supplementation production of Delta Smelt

open access: yesTransactions of the American Fisheries Society, 2023
Abstract Objective To support the declining wild population of Delta Smelt, a conservation hatchery has expanded its mission from maintaining a backup population as insurance against extinction to also producing fish for release into the wild.
Melanie E. F. LaCava   +8 more
openaire   +3 more sources

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

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