Results 21 to 30 of about 293 (146)

Comparative and Functional Analysis of Exosomal microRNAs During Semelparous Reproduction in Ayu Fish (<i>Plecoglossus altivelis</i>). [PDF]

J Extracell Biol
ABSTRACT As a life history strategy, some semelparous organisms, such as the ayu fish (Plecoglossus altivelis), reproduce only once in their lifetime and then die. They invest heavily in their single reproductive event, producing many offspring. However, the regulatory mechanisms that trigger mortality after reproduction are not well understood ...
Pan Y, Meng L, Yoshida K, Qiu L, Ito T, Yonezawa R, Yoshitake K, Saito S, Bailey-Kobayashi N, Yoshida T, Kinoshita S, Asakawa S.   +11 more
europepmc   +2 more sources

Floodplain inundation and lateral connectivity promote productivity in a managed river ecosystem. [PDF]

Ecol Appl
Abstract River‐floodplain ecosystems near urban centers are heavily engineered for flood protection and water delivery, which has led to a loss of lateral hydrologic connectivity between rivers and their floodplains. This study has two objectives: (1) Does increased lateral connectivity resulting from floodplain inundation increase chlorophyll a ...
Khanna S, Pien C, Goertler P, Yamane L, Stumpner E, Gaeta JW, Chapple D, Berglund M, Peek R.   +8 more
europepmc   +2 more sources

Does tidal marsh restoration lead to the recovery of trophic pathways that support estuarine fishes? [PDF]

Ecol Appl
Abstract Evaluation of tidal marsh restoration success is typically based on the recovery of habitat size and target species. However, food‐web structure may provide valuable insight into ecosystem functioning trajectories. Here, we studied restored tidal marshes of different ages (new, young, old; spanning 1–150 years) in comparison with nearby ...
Pagliaro MD, De La Cruz SEW, Woo I, Sousa J, Rich N, Grimaldo L, Colombano D, Ruhí A.   +7 more
europepmc   +2 more sources

Age and repeated collection interval effects on sperm motility in the endangered delta smelt Hypomesus transpacificus

Endangered Species Research
Understanding the reproductive dynamics of endangered species is crucial for effective conservation strategies. This study examines the impact of age and repeated collection interval on sperm motility in the Critically Endangered delta smelt Hypomesus ...
MM Rahman, T Hung
doaj   +2 more sources

Space‐for‐time is not necessarily a substitution when monitoring the distribution of pelagic fishes in the San Francisco Bay‐Delta [PDF]

Ecology and Evolution, 2021
Occupancy models are often used to analyze long‐term monitoring data to better understand how and why species redistribute across dynamic landscapes while accounting for incomplete capture.
Adam Duarte, James T. Peterson
doaj   +2 more sources

Loss of plasticity in maturation timing after ten years of captive spawning in a delta smelt conservation hatchery [PDF]

Evolutionary Applications, 2023
Adaptation to captivity in spawning programs can lead to unintentional consequences, such as domestication that results in reduced fitness in the wild.
Melanie E. F. LaCava, Joanna S. Griffiths, Luke Ellison, Evan W. Carson, Tien‐Chieh Hung, Amanda J. Finger   +5 more
doaj   +2 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

Exposure to permethrin or chlorpyrifos causes differential dose- and time-dependent behavioral effects at early larval stages of an endangered teleost species [PDF]

Endangered Species Research, 2021
Pyrethroid and organophosphate pesticides are two of the most commonly used classes of insecticide worldwide. At sublethal concentrations, permethrin (a pyrethroid) and chlorpyrifos (an organophosphate) impact behavior in model fish species.
PC Mundy, KE Huff Hartz, CA Fulton, MJ Lydy, SM Brander, TC Hung, N Fangue, RE Connon   +7 more
doaj   +2 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

MaxTemp: A Method to Maximise Precision of the Temporal Method for Estimating N_e in Genetic Monitoring Programs. [PDF]

Mol Ecol Resour
ABSTRACT We introduce a new software program, MaxTemp, that increases precision of the temporal method for estimating effective population size (Ne) in genetic monitoring programs, which are increasingly used to systematically track changes in global biodiversity.
Waples RS, Masuda MM, LaCava MEF, Finger AJ.   +3 more
europepmc   +2 more sources