Results 41 to 50 of about 293 (144)

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

Endangered 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

SmeltCam: underwater video codend for trawled nets with an application to the distribution of the imperiled delta smelt. [PDF]

PLoS ONE, 2013
Studying rare and sensitive species is a challenge in conservation biology. The problem is exemplified by the case of the imperiled delta smelt Hypomesus transpacificus, a small delicate fish species endemic to the San Francisco Estuary, California ...
Frederick Feyrer, Donald Portz, Darren Odum, Ken B Newman, Ted Sommer, Dave Contreras, Randall Baxter, Steven B Slater, Deanna Sereno, Erwin Van Nieuwenhuyse   +9 more
doaj   +1 more source

Physiological stress biomarkers reveal stocking density effects in late larval Delta Smelt (Hypomesus transpacificus) [PDF]

Aquaculture, 2016
Abstract Suboptimal fish stocking densities in experimental systems may elicit stress responses that can affect experimental results. Fish species, age and size, water chemistry and flow, and physical characteristics of the experimental system (e.g., tank, cage) are among the parameters to be considered when determining stocking densities.
Matthias Hasenbein, Nann A. Fangue, Juergen P. Geist, Lisa M. Komoroske, Richard E. Connon   +4 more
openaire   +3 more sources

Investigating the efficacy of tidal wetland restoration in enhancing aquatic food web resources for native fishes

Restoration Ecology, EarlyView.
Abstract Introduction Endangered fish species, such as Delta smelt (Hypomesus transpacificus), in the San Francisco Estuary are threatened by a multitude of anthropogenic stressors. Tidal wetland restoration can partially mitigate these stressors by increasing food availability of aquatic invertebrate prey, but the efficacy of restoration remains ...
Gabriel Ng, Stacy Sherman, Christy Bowles, Michelle Avila   +3 more
wiley   +1 more source

Silverside gold mine? Restored tidal habitats host abundant invasive fishes in a novel California marsh (U.S.A.)

Restoration Ecology, EarlyView.
Abstract Introduction Novel ecosystems, where environmental conditions have been fundamentally altered from a historic norm, require nontraditional approaches to restoration. Suisun Marsh, located within California's San Francisco Estuary (SFE), is a novel, brackish water wetland complex, where managers have begun restoring tidal connectivity to ...
Elsie Platzer, Kyle Phillips, Teejay O'Rear, John Durand   +3 more
wiley   +1 more source

Lag in Effective Population Size Decline Amid Demographic Collapse: A Case Study of the Delta Smelt (Hypomesus transpacificus)

Molecular Ecology, Volume 35, Issue 10, May 2026.
ABSTRACT Effective population size (Ne), census size (Nc) and their ratio (Ne/Nc) are widely used indicators in conservation genetics, yet long‐term empirical data tracking of all three metrics over long time scales in wild populations remains rare. Using monitoring data from 1995 to 2020, we examined temporal dynamics of Ne, Nc and their relationship ...
Amanda J. Finger, Melanie E. F. LaCava, Evan W. Carson, James A. Hobbs, Tien‐Chieh Hung, Matthew L. Nobriga, Leo Polansky, Robin S. Waples   +7 more
wiley   +1 more source

Coupled Downscaled Climate Models and Ecophysiological Metrics Forecast Habitat Compression for an Endangered Estuarine Fish. [PDF]

PLoS ONE, 2016
Climate change is driving rapid changes in environmental conditions and affecting population and species' persistence across spatial and temporal scales.
Larry R Brown, Lisa M Komoroske, R Wayne Wagner, Tara Morgan-King, Jason T May, Richard E Connon, Nann A Fangue   +6 more
doaj   +1 more source

The effects of scientific uncertainty and values trade‐offs on flow management decisions for an endangered fish

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract Consumptive use of freshwater is of concern in many estuarine ecosystems, and various frameworks have been used to prescribe environmental flows to benefit native species. However, few of these frameworks explicitly examine the potential trade‐offs between socioeconomic and conservation‐oriented values.
Brian Mahardja, William E. Smith, Brian D. Healy, Cameron Koizumi, Matthew L. Nobriga, Shawn Acuña, Brian Crawford, Kristin K. Arend, Michael C. Runge   +8 more
wiley   +1 more source

Molecular Identification of the Nematode Eustrongylides ignotus in Mandarin Fish, Siniperca chuatsi

Aquaculture, Fish and Fisheries, Volume 5, Issue 6, December 2025.
ABSTRACT Mandarin fish (Siniperca chuatsi) is a high‐value economic freshwater fish in China; however, the frequent occurrence of diseases threatens its production. To this end, we explored the impact of a nematode parasite newly found in the abdomen of mandarin fish collected from Pudong, Shanghai, China.
Jin‐hua Gao, Ning‐xin Guo, Jin‐liang Zhao, Gazahegn‐Wakjira Yadata, Kang‐ning Cai, Yu‐fei Liu, Zhi‐yi Yan, Yi‐fan Liu, Zhi‐chao Meng   +8 more
wiley   +1 more source

A Covered Cod-End and Tow-Path Evaluation of Midwater Trawl Gear Efficiency for Catching Delta Smelt (Hypomesus transpacificus)

San Francisco Estuary and Watershed Science, 2017
https://doi.org/10.15447/sfews.2017v15iss4art3For nearly 50 years, the California Department of Fish and Wildlife has used a midwater trawl to intensively monitor fish populations in the San Francisco Estuary during the fall, sampling over 100 locations
Lara Mitchell, Ken Newman, Randall Baxter   +2 more
doaj