Results 61 to 70 of about 1,647 (204)

Developmental staging and salinity tolerance in embryos of the delta smelt, Hypomesus transpacificus

Aquaculture, 2019
Delta smelt (Hypomesus transpacificus) is a critically endangered species endemic to the San Francisco Bay Delta (SFBD). Important for the conservation of this species is understanding the physiological and ecological impacts contributing to their population decline, and current studies lack information on embryonic development.
Romney, Amie LT, Yanagitsuru, Yuzo R, Mundy, Paige C, Fangue, Nann A, Hung, Tien-Chieh, Brander, Susanne M, Connon, Richard E   +6 more
openaire   +5 more sources

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

Locating Little Larvae: Environmental DNA Methods Can Detect a Rare Fish Species Under Field Estuarine Conditions

Environmental DNA, Volume 8, Issue 2, March/April 2026.
We measured a positive linear relationship between eDNA concentration and abundance for larval Delta Smelt (Hypomesus transpacificus) with N = 1 larva exceeding the limit of detection for the novel qPCR assay. Field experiments quantified the probability of detection for eDNA sampling methods at known abundances and distances from source. ABSTRACT Rare
Sarah A. Stinson, Melinda R. Baerwald, Kevan Yamahara, Avery Scherer, Yekaterina Karpenko, Cheryl Dean, Matthew B. Espe, Gregg Schumer, Sarah Brown, Brian Schreier, Daphne Gille   +10 more
wiley   +1 more source

Видовой состав и структура сообщества рыб в прибрежной зоне северо-восточной части Татарского пролива (Японское море) в августе и октябре

Амурский зоологический журнал
Рассмотрен видовой состав и структура сообщества рыб у северо-восточного побережья Татарского пролива (Японское море) на глубинах до 3 м по результатам обловов закидным и мальковым неводами в августе и октябре 2009 г.
Эльза Рудольфовна Ившина, Алексей Владимирович Метленков, Виталий Дмитриевич Никитин   +2 more
doaj   +1 more source

Identifying Environmental Factors Limiting Recovery of an Imperiled Estuarine Fish

Frontiers 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

Food habits and dietary variability of pelagic nekton off Oregon and Washington, 1979-1984 [PDF]

, 1987
The food habits of 20 species of pelagic nekton were investigated from collections made with small-mesh purse seines from 1979-84 off Washington and Oregon. Four species (spiny dogfish, Squalus acanthias; soupfin shark, Galeorhinus zyopterus; blue shark,
Brodeur, Richard D., Lorz, Harriet V., Pearcy, William G.   +2 more
core  

Characterization of salmon‐foraging harbor seals (Phoca vitulina) in the Erimo region, Hokkaido, Japan, using finite mixture models

The Journal of Wildlife Management, Volume 90, Issue 2, February 2026.
Finite mixture models revealed that older, larger harbor seals specialize in salmon predation at setnets in Hokkaido, Japan, suggesting targeted management strategies focusing on these specialist individuals could effectively reduce fishery conflicts while protecting the broader seal population.
Takahito Masubuchi, Mari Kobayashi
wiley   +1 more source

Regional and seasonal patterns of epipelagic fish assemblages from the central California Current [PDF]

, 2011
The coastal Pacific Ocean off northern and central California encompasses the strongest seasonal upwelling zone in the California Current ecosystem.
Ammann, Arnold J., Harding, Jeffrey A., MacFarlane, R. Bruce   +2 more
core  

A Qualitative Comparison of Spawning Behavior Between Cultured and Wild Delta Smelt (Hypomesus transpacificus)

San Francisco Estuary and Watershed Science, 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. In this study, we asked whether spawning between and among wild and cultured Delta Smelt varies in terms of behavior or resulting egg fertilization success.
Tsai, Yi-Jiun Jean, Chase, Samantha N., Carson, Evan W., Zweig, Leanna, Hung, Tien-Chieh   +4 more
openaire   +3 more sources

Length–weight relationships of 12 fish species (Actinopterygii) from nearshore and coastal Alaskan waters of the eastern Bering, Chukchi, and Beaufort seas [PDF]

Acta Ichthyologica et Piscatoria
Changing ocean conditions in higher latitude ecosystems and the potential impact on marine fish underscores the need for baseline information on their biology and growth.
Edward Hu, Todd W. Miller, Johanna J. Page   +2 more
doaj   +3 more sources