Results 61 to 70 of about 293 (146)

Validating estuarine movements from otoliths for an imperiled fish

Aquatic Biology
The application of otolith tools to infer the movement history of fishes requires controlled experiments to validate methods and assess confidence in inferences gained for wild specimens.
LS Lewis, M Willmes, C Denney, L Cavole, W Xieu, RA Fichman, TC Hung, L Ellison, T Stevenson, AA Schultz, BG Hammock, S Teh, JA Hobbs   +12 more
doaj   +1 more source

Identifying minimum freshwater habitat conditions for an endangered fish using life cycle analysis

Conservation Science and Practice
Identifying the most important factors affecting population growth in animal life cycles is an important tool of species conservation. Delta Smelt (Hypomesus transpacificus), an annual fish endemic to the San Francisco Estuary in California (USA), has ...
Leo Polansky, Lara Mitchell, Matthew L. Nobriga   +2 more
doaj   +1 more source

CRISPR‐based environmental DNA detection for a rare endangered estuarine species

Environmental DNA
Environmental DNA (eDNA) methods complement traditional aquatic monitoring surveys and are especially advantageous for rare and listed species to detect spatial and temporal distribution patterns.
Raman P. Nagarajan, Leigh Sanders, Natalie Kolm, Alejandro Perez, Taylor Senegal, Brian Mahardja, Melinda R. Baerwald, Andrea D. Schreier   +7 more
doaj   +1 more source

Revisiting Assumptions that Underlie Estimates of Proportional Entrainment of Delta Smelt by State and Federal Water Diversions from the Sacramento-San Joaquin Delta

San Francisco Estuary and Watershed Science, 2011
The delta smelt is a small, endemic fish that resides in the upper San Francisco Estuary. They are listed under state and federal Endangered Species Acts. Since 2002, their abundance has been at record low levels.
William J. Miller
doaj  

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

San Francisco Estuary and Watershed Science, 2016
doi: http://dx.doi.org/10.15447/sfews.2016v14iss1art3Long-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 ...
Aaron J. Bever, Michael L. MacWilliams, Bruce Herbold, Larry R. Brown, Frederick V. Feyrer   +4 more
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Role of freshwater floodplain-tidal slough complex in the persistence of the endangered delta smelt.

PLoS ONE, 2019
Seasonal floodplain wetland is one of the most variable and diverse habitats found in coastal ecosystems, yet it is also one of the most highly altered by humans.
Brian Mahardja, James A Hobbs, Naoaki Ikemiyagi, Alyssa Benjamin, Amanda J Finger   +4 more
doaj   +1 more source

Long-Term Seasonal Trends in the Prey Community of Delta Smelt (Hypomesus transpacificus) Within the Sacramento-San Joaquin Delta, California

Estuaries and Coasts, 2016
Abiotic factors and species introductions can alter food web timing, disrupt life cycles, and change life history expressions and the temporal scale of population dynamics in zooplankton communities. We examined physical, trophic, and zooplankton community dynamics in the San Francisco Estuary, California, a highly altered Mediterranean climate ...
Merz, Joseph E., Bergman, Paul S., Simonis, Joseph L., Delaney, David, Pierson, James, Anders, Paul   +5 more
openaire   +1 more source

The Spawning Migration of Delta Smelt in the Upper San Francisco Estuary

San Francisco Estuary and Watershed Science, 2011
Ted Sommer, Francine Mejia, Matt Nobriga, Fred Feyrer, and Lenny Grimaldodoi: http://dx.doi.org/10.15447/sfews.2014v9iss2art2While there is substantial information about the upstream migration of commercially and recreationally important fishes ...
Ted Sommer, Francine H Mejia, Matthew L. Nobriga, Frederick Feyrer, Lenny Grimaldo   +4 more
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Feeding Habit of Pond Smelt (Hypomesus transpacificus nipponensis) and Its Impact on the Zooplankton Community in Lake Suwa, Japan

Journal of Freshwater Ecology, 2005
ABSTRACT We examined the feeding habit of pond smelt (Hypomesus transpacificus nipponesis) and its impact on the zooplankton community in Lake Suwa, Japan, from May to December 2001. Stomach contents were analyzed, and prey importance and the prey selectivity index were estimated from the stomach contents of fish and prey density in the lake.
Kwang-Hyeon Chang, Takayuki Hanazato, Go Ueshima, Hideshige Tahara   +3 more
openaire   +1 more source

Diet, Prey Selection, and Body Condition of Age-0 Delta Smelt, Hypomesus transpacificus, in the Upper San Francisco Estuary

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 ...
Steven B. Slater, Randall D. Baxter
doaj