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Postrelease movements of captive-reared adult Atlantic Salmon in two Maine rivers Postrelease movements of captive-reared adult Atlantic Salmon in two Maine rivers
Objective Atlantic Salmon Salmo salar remain at critically low levels in the United States, with the last remaining populations located in the state of Maine. In 2021, a pilot captive-rearing program, similar to a smolt-to-adult supplementation, was implemented to boost naturally spawning adults in support of recovery goals.Methods We conducted a 2-year acoustic telemetry study to track...
Authors
Carolyn A. Merriam, Danielle Frechette, Joseph D. Zydlewski
Application of a data-limited stock assessment model to understand the historical population of cisco in Lake Erie Application of a data-limited stock assessment model to understand the historical population of cisco in Lake Erie
Historically, cisco (Coregonus artedi) supported one of the largest commercial fisheries in Lake Erie with over 25 million kilograms landed in a single year during the fisheries’ peak in 1912. Like many other coregonines in the Laurentian Great Lakes, the Lake Erie cisco population eventually collapsed and is now considered extirpated. Management interest in restoring coregonine...
Authors
Laura M. Lee, John A. Sweka, Brian Weidel
Confocal laser-scanning microscopy (CLSM)-based thermal maturity of Tasmanites and progress in standardization of fluorescence microspectrometry Confocal laser-scanning microscopy (CLSM)-based thermal maturity of Tasmanites and progress in standardization of fluorescence microspectrometry
Evaluation of thermal maturity in vitrinite-free or vitrinite-deficient sediments via fluorescence microspectrometry can provide relevant information related to petroleum exploration and thermal history assessment. However, variation in spectral fluorescence properties of alginite macerals with increasing thermal maturity is largely underexplored. Here, authors of this study have applied...
Authors
Jolanta Kus, Paul C. Hackley
Grass carp (Ctenopharyngodon idella) movement states and backwater use can inform removal efforts Grass carp (Ctenopharyngodon idella) movement states and backwater use can inform removal efforts
Expansion of grass carp (Ctenopharyngodon idella) within the Laurentian Great Lakes poses significant ecological and economic risks. Suppression efforts to remove grass carp have increased to curtail population growth, but capture efficiency remains low. One management challenge is the lack of understanding how this invasive species is using its novel habitats in the Great Lakes. This...
Authors
Sophia Marie Bonjour, Robert D. Hunter, James J. Roberts, Travis O. Brenden, Scott F. Colborne, Matthew D. Faust, Christine M. Mayer, Robert L. Mapes, Richard Kraus, Robin D. Calfee, Matthew Ross Acre
Longevity, age-specific survival, and mean generation time of Rana muscosa: Implications for conservation of possibly the longest lived Ranid frog Longevity, age-specific survival, and mean generation time of Rana muscosa: Implications for conservation of possibly the longest lived Ranid frog
Life history strategies vary widely among species and play a vital role in extinction risk, especially in a rapidly changing environment. For many taxa, information on life history such as longevity, lifespan, and generation time is incomplete. This is especially true for amphibians, which have experienced large-scale declines in recent decades. The mountain yellow-legged frog (Rana...
Authors
Cynthia Joan Hitchcock, Adam R. Backlin, Amanda Renee Goldberg, Sarah Kay Thomsen, Erin L. Muths, Elizabeth Gallegos, Robert D. Fisher
Tree swallows as indicators of per- and polyfluoroalkyl substance exposure and effects at select Department of Defense sites along the East Coast and at sites with different sources in the Upper Midwest, United States Tree swallows as indicators of per- and polyfluoroalkyl substance exposure and effects at select Department of Defense sites along the East Coast and at sites with different sources in the Upper Midwest, United States
Questions remain about the distribution of per- and polyfluoroalkyl substances (PFAS) in the environment, the sources and movement within and between ecosystems, and whether there are effects from such exposure. Information from the Upper Midwest and the mid-Atlantic regions of the United States, which have different PFAS sources, were investigated. Concentrations of Total40 (sum of 40...
Authors
Christine M. Custer, Paul M. Dummer, Sandra L. Schultz, Natalie Karouna-Renier, Cole W. Matson
Experimental warming alters free-living nitrogen fixation in a humid tropical forest Experimental warming alters free-living nitrogen fixation in a humid tropical forest
Microbial nitrogen (N) fixation accounts for c. 97% of natural N inputs to terrestrial ecosystems. These microbes can be free-living in the soil and leaf litter (asymbiotic) or in symbiosis with plants. Warming is expected to increase N-fixation rates because warmer temperatures favor the growth and activity of N-fixing microbes. We investigated the effects of warming on asymbiotic...
Authors
Parker M. Bartz, Iana F. Grullón-Penkova, Molly A. Cavaleri, Sasha C. Reed, Saima Shahid, Tana E. Wood, Benedicte Bachelot
Genetic and environmental factors associated with survival of a rare songbird in a fragmented urban landscape Genetic and environmental factors associated with survival of a rare songbird in a fragmented urban landscape
The coastal Cactus Wren (Campylorhynchus brunneicapillus) persists in small and fragmented populations throughout southern California that are subject to genetic drift and inbreeding. We combined individual banding and resighting data and genotyped individuals at 22 microsatellite loci to assess whether heterozygosity was associated with survival across three regional Cactus Wren...
Authors
Amy G. Vandergast, Anna Mitelberg, Barbara E. Kus, Kristine L. Preston, Suellen Lynn, Alexandra Houston, Robert C. Klinger
SURF: An automated method for building nonplanar 3D fault models from earthquake hypocenters SURF: An automated method for building nonplanar 3D fault models from earthquake hypocenters
Accurately characterizing 3D fault geometry is vital for improving our understanding of earthquake behavior and informing the development of seismic hazard models. Despite their importance, subsurface fault structures tend to be poorly constrained because of limitations in observational data. Improvements to the seismic networks and earthquake detection algorithms have increased the...
Authors
Travis Vincent Alongi, Austin J. Elliott, Robert J. Skoumal, David R. Shelly, Alexandra Elise Hatem
Sea-level driven isolation of glacial plant refugia revealed by submerged lake sediment from the Bering Land Bridge and St. Matthew Island Sea-level driven isolation of glacial plant refugia revealed by submerged lake sediment from the Bering Land Bridge and St. Matthew Island
Bering Land Bridge (BLB) climate and vegetation during the Last Glacial Maximum (LGM) remains largely understudied, given challenges associated with collecting records from the submerged BLB. Previous records, confined to the margins of the modern land area and adjacent shelf, reveal conflicting interpretations of Beringian vegetation during the LGM. Here, we reconstruct LGM vegetation
Authors
Miriam C. Jones, Lesleigh Anderson, Beth E. Caissie, David J. Harning, Thomas A. Ager
Mars Sample Return Sample Receiving Project measurement definition team final report Mars Sample Return Sample Receiving Project measurement definition team final report
No abstract available.
Authors
Brandi L. Carrier, Elliot Sefton-Nash, H. Graham, John C. Bridges, Vinciane Debaille, Christopher D.K. Herd, Allison C. Fox, Katherine L. French, Timothy Haltigin, Elisabeth M. Hausrath, Agata M. Krzesinska, Daniel Paardekooper, Elizabeth B. Rampe, Susanne P. Schwenzer, Michelle Viotti, Jean Duprat, Marco Ferrari, Mihaela Glamoclija, Andrea Harringon, Aurore Hutzler, Yang Liu, Cara Magnabosco, Jeffrey J. Marlow, Clara Maurel, Hannah McLaurin, Ryan Ogliore, Andreas Pack, Segaran Pillai, Christian Schroeder, Alex L. Sessions, S. Siljeström, Andrew Steele, Bronwyn L. Teece, Valerie M. Tu, Kun Wang
New maps of natural radioactivity reveal critical minerals and more New maps of natural radioactivity reveal critical minerals and more
High-resolution airborne radiometric surveys are covering more ground than ever to provide insights into unseen geology, mineral resource potential, and possible health hazards.
Authors
Anjana K. Shah, Daniel H. Doctor, Chloe Danielle Gustafson, Alan D. Pitts