Results 21 to 30 of about 298 (142)

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

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 each month.
Lara Mitchell, Kenneth Newman
exaly   +5 more sources

Long-Term Trends in Summertime Habitat Suitability for Delta Smelt, Hypomesus transpacificus

San Francisco Estuary and Watershed Science, 2008
The biological productivity of river-dominated estuaries is affected strongly by variation in freshwater inflow, which affects nursery habitat quality. Previous research has shown this is generally true in the upper San Francisco Estuary, California, USA;
Matthew L. Nobriga, Ted R. Sommer, Frederick Feyrer, Kevin Fleming   +3 more
doaj   +3 more sources

Evaluating environmental DNA detection of a rare fish in turbid water using field and experimental approaches [PDF]

PeerJ
Detection sensitivity of aquatic species using environmental DNA (eDNA) generally decreases in turbid water but is poorly characterized. In this study, eDNA detection targeted delta smelt (Hypomesus transpacificus), a critically endangered estuarine fish
Ann E. Holmes, Melinda R. Baerwald, Jeff Rodzen, Brian M. Schreier, Brian Mahardja, Amanda J. Finger   +5 more
doaj   +3 more sources

Global Burden of Clinostomum complanatum in Freshwater Fish: A Systematic Review and Meta‐Analysis of Prevalence and Pathological Effect

Aquaculture, Fish and Fisheries
Clinostomum complanatum infection is a trematode parasite infecting diverse freshwater fish hosts, causing pathological damage and economic losses. Despite its veterinary and public health importance, its global burden remains insufficiently quantified ...
Mengesha Ayehu Getnet, Melkie Dagnaw Fenta, Asnakew Mulaw Berihun, Wilmien Luus Powell, Moges Maru Alemayehu, Tameru Gedefaw Mebratie, Zenebe Jemere Aragaw, Zewdu Seyoum Tarekegn   +7 more
doaj   +2 more sources

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

Molecular Ecology
ABSTRACT Effective population size ( N e ), census size ( N c ) and their ratio ( N
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
openaire   +2 more sources

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

Environmental DNA
Rare species are difficult to monitor using traditional methods, making them excellent candidates for environmental DNA (eDNA) monitoring. The larval life stages of Delta Smelt (Hypomesus transpacificus) and Longfin Smelt (Spirinchus thaleichthys) are ...
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
doaj   +2 more sources

Effects of Salinity and Temperature on Survival, Growth, and Food Intake of Ramshorn Snail (<i>Helisoma anceps</i>). [PDF]

Ecol Evol
This study examines how salinity and temperature affect the survival, growth, and food intake of the freshwater snail Helisoma anceps. Snails exposed to salinities of 10 ppt and above died within 48 h, while growth and food intake decreased as salinity increased. The results provide information on the environmental limits of H. anceps and its use under
Chen SH, Hung TC.
europepmc   +2 more sources

Quantifying the Evolutionary Potential for Delta Smelt Persistence in a Warming Habitat. [PDF]

Evol Appl
ABSTRACT Long‐term persistence of managed species will depend, in part, on whether the species harbors the physiological or genetic potential to adjust to warming temperatures, and whether relevant genetic variation is modified by management practices.
Griffiths JS, Finger AJ, Rahman MM, Davis BE, Hung TC, Fangue NA, Whitehead A.   +6 more
europepmc   +2 more sources

Molecular Characterization of Eustrongylides sp. Infecting Channa punctata in Bangladesh. [PDF]

Vet Med Sci
In this study, a total of 137 medium‐sized Channa punctata (17.5 ± 2.5 cm) were collected from different locations of Jamalpur and Netrokona district, Bangladesh and microscopically identified as belonging to the genus Eustrongylides based on morphological characteristics.
Nibir SS, Dey AR, Rahman T, Suchona JT, Hossain S, Bushra SS, Juthy JP, Paul S, Tanwi JT, Tabassum T, Faruk MAR.   +10 more
europepmc   +2 more sources

Highly and Lowly Domesticated Endangered Fish From a Conservation Hatchery Diverge in Their Thermal Physiology, Transcriptome, and Methylome. [PDF]

Evol Appl
ABSTRACT Conservation hatcheries aim to produce fish for supplementation of wild populations, but hatchery environments may drive phenotypic divergence from wild fish. These diverged traits may have reduced fitness in the wild, which could compromise wild population sustainability and evolutionary potential, such as in response to climate change. Delta
Griffiths JS, Finger AJ, Baerwald MR, Rahman MM, Hung TC, Fangue NA, Whitehead A.   +6 more
europepmc   +2 more sources