Results 121 to 130 of about 293 (146)
Long-Term Trends in Summertime Habitat Suitability for Delta Smelt, <em>Hypomesus transpacificus</em> [PDF]
San Francisco Estuary and Watershed Science, 2008 Ted Sommer +2 more
exaly +2 more sources
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Environmental Toxicology and Chemistry, 2014
Abstract The Cache Slough complex is an area of tidal sloughs in the Sacramento–San Joaquin River Delta of California (USA), and is surrounding by irrigated agricultural lands. Among the species of concern in the area is the delta smelt (Hypomesus transpacificus), a federally listed threatened ...
Donald P, Weston +4 more
openaire +2 more sources
Abstract The Cache Slough complex is an area of tidal sloughs in the Sacramento–San Joaquin River Delta of California (USA), and is surrounding by irrigated agricultural lands. Among the species of concern in the area is the delta smelt (Hypomesus transpacificus), a federally listed threatened ...
Donald P, Weston +4 more
openaire +2 more sources
Aquatic Toxicology, 2018
Concerns regarding non-target toxicity of new herbicides used to control invasive aquatic weeds in the San Francisco Estuary led us to compare sub-lethal toxicity of four herbicides (penoxsulam, imazamox, fluridone, and glyphosate) on an endangered fish species Delta Smelt (Hypomesus transpacificus). We measured 17β-estradiol (E2) and glutathione (GSH)
Jiali, Jin +11 more
openaire +2 more sources
Concerns regarding non-target toxicity of new herbicides used to control invasive aquatic weeds in the San Francisco Estuary led us to compare sub-lethal toxicity of four herbicides (penoxsulam, imazamox, fluridone, and glyphosate) on an endangered fish species Delta Smelt (Hypomesus transpacificus). We measured 17β-estradiol (E2) and glutathione (GSH)
Jiali, Jin +11 more
openaire +2 more sources
Hydrobiologia, 2020
Understanding how environmental factors—here, light intensity and turbidity—influence the feeding, growth, and survival of larval Delta Smelt is critical for optimizing the culture of this endangered fish species. Three sets of rearing trials were conducted where larvae were cultured under different levels of turbidity and light intensity.
Galen Tigan +4 more
openaire +1 more source
Understanding how environmental factors—here, light intensity and turbidity—influence the feeding, growth, and survival of larval Delta Smelt is critical for optimizing the culture of this endangered fish species. Three sets of rearing trials were conducted where larvae were cultured under different levels of turbidity and light intensity.
Galen Tigan +4 more
openaire +1 more source
Diet, Prey Selection, and Body Condition of Age-0 Delta Smelt, Hypomesus transpacificus, in the Upper San Francisco Estuary [PDF]
San Francisco Estuary and Watershed Science, 2014 Steven B. Slater and Randall D. Baxterdoi: http://dx.doi.org/10.15447/sfews.2014v12iss3art1The Delta Smelt, an endangered fish, has suffered a long-term decline in abundance, believed to result from, in part, to changes in the pelagic food web of the upper San Francisco Estuary.
Slater, Steven B., Baxter, Randall D.
exaly +5 more sources
Copeia, 1995
Two species of smelt (Osmeridae), Hypomesus transpacificus and Spirinchus thaleichthys, found in the Sacramento-San Joaquin estuary recently have declined in abundance, and H. transpacificus has been threatened by the introduction of nonnative Hypomesus nipponensis.
Peter Moyle, Howard Bradley Shaffer
exaly +2 more sources
Two species of smelt (Osmeridae), Hypomesus transpacificus and Spirinchus thaleichthys, found in the Sacramento-San Joaquin estuary recently have declined in abundance, and H. transpacificus has been threatened by the introduction of nonnative Hypomesus nipponensis.
Peter Moyle, Howard Bradley Shaffer
exaly +2 more sources
Oecologia, 2000
In California's Sacramento-San Joaquin estuary, environmental protection and habitat restoration efforts directed at a threatened native osmerid, the delta smelt (Hypomesus transpacificus), are complicated by the presence of a morphologically similar non-native congener, the wakasagi (H. nipponensis), transported to the estuary from upstream reservoirs.
C, Swanson +3 more
openaire +2 more sources
In California's Sacramento-San Joaquin estuary, environmental protection and habitat restoration efforts directed at a threatened native osmerid, the delta smelt (Hypomesus transpacificus), are complicated by the presence of a morphologically similar non-native congener, the wakasagi (H. nipponensis), transported to the estuary from upstream reservoirs.
C, Swanson +3 more
openaire +2 more sources
Limnology, 2010
The predation impact of the larvae of pond smelt Hypomesus transpacificus nipponensis on a zooplankton community was studied using mesocosms. The fish significantly depressed the abundances of copepod nauplii and rotifers, especially Hexarthra mira. The vulnerabilities of these prey might be determined by their swimming behavior and population density,
Kousuke Ibe +2 more
openaire +1 more source
The predation impact of the larvae of pond smelt Hypomesus transpacificus nipponensis on a zooplankton community was studied using mesocosms. The fish significantly depressed the abundances of copepod nauplii and rotifers, especially Hexarthra mira. The vulnerabilities of these prey might be determined by their swimming behavior and population density,
Kousuke Ibe +2 more
openaire +1 more source
Reviews in Fisheries Science, 2012
The delta smelt is an annual fish that is endemic to the Sacramento-San Joaquin Estuary and is protected under federal and California Endangered Species Acts. Record low abundances have occurred since 2004. Three questions are addressed here: What is the relative importance of environmental factors with direct effects on abundance?
William J. Miller +4 more
openaire +1 more source
The delta smelt is an annual fish that is endemic to the Sacramento-San Joaquin Estuary and is protected under federal and California Endangered Species Acts. Record low abundances have occurred since 2004. Three questions are addressed here: What is the relative importance of environmental factors with direct effects on abundance?
William J. Miller +4 more
openaire +1 more source
Environmental Toxicology and Chemistry, 2011
AbstractThe delta smelt (Hypomesus transpacificus) is an endangered pelagic fish species endemic to the Sacramento–San Joaquin estuary (CA, USA), and considered an indicator of ecosystem health. Copper is a contaminant of concern in Californian waterways that may affect the development and survival of this endangered species.
Richard E, Connon +7 more
openaire +2 more sources
AbstractThe delta smelt (Hypomesus transpacificus) is an endangered pelagic fish species endemic to the Sacramento–San Joaquin estuary (CA, USA), and considered an indicator of ecosystem health. Copper is a contaminant of concern in Californian waterways that may affect the development and survival of this endangered species.
Richard E, Connon +7 more
openaire +2 more sources