样式: 排序: IF: - GO 导出 标记为已读
-
-
Effectiveness of an ecological flow regime to assure successful recruitment of anadromous Coregoninae populations in the Rupert River (northern Quebec, Canada) Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-03-02 Louis Belzile, Jean‐Christophe Guay
ObjectiveAs part of a large‐scale hydroelectric project, the mean annual flow of the Rupert River (northern Quebec, Canada) was reduced by 52% at its mouth in 2009. To protect fish habitat, an ecological flow regime that was modulated according to the biological seasons was implemented downstream from the diversion point. An 8‐year monitoring program, including 2 years before partial diversion, was
-
Male reproductive output and sperm competition as indicated by gonadosomatic index in Paddlefish stocks Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-02-23 Dennis L. Scarnecchia, Jason D. Schooley, Aaron Slominski, K. Michael Backes, Brandon Brown, Brent D. Gordon, Youngtaik Lim
We investigated if large Paddlefish Polyodon spathula invest in testis weight disproportionately more than smaller males, as expressed by the gonadosomatic index (GSI). The approach was to assess the relation between testis weight F (i.e., the combined weight of both testes) and fish weight W in the expression F = aWb. The hypothesis was that sperm competition in Paddlefish would be expected (with
-
Strong variation in Brook Trout trends across geology, elevation, and stream size in Shenandoah National Park Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-02-22 Evan S. Childress, E. David Demarest, John E. B. Wofford, Nathaniel P. Hitt, Benjamin H. Letcher
Landscape context structures fish abundance and dynamics, and understanding trends in fish abundance across the landscape is often prerequisite for effective conservation. In this study, we evaluated the status and trends of Brook Trout Salvelinus fontinalis in Shenandoah National Park to understand how these are structured across bedrock geology, elevation, and stream size.
-
Integrating spatial stream network models and environmental DNA to estimate current and future distributions of nonnative Smallmouth Bass Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-01-25 John J. Winkowski, Julian D. Olden, Sarah Brown
Climate change is fueling the rapid range expansion of invasive species in freshwater ecosystems. This has led to mounting calls from natural resource managers for more robust predictions of invasive species distributions to anticipate threats to species of concern and implement proactive conservation and restoration actions. Here, we applied recent advances in fish sampling and statistical modeling
-
Multiscale analysis predicts native species presence based on habitat and nonnative species abundance Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-01-22 Crosby Hedden, Skyler Hedden, Keith Gido, Alexander C. Cameron, David Propst, William Stewart
The loss and degradation of aquatic habitat through fragmentation, water extraction, and climate warming contribute to declining native stream fish diversity. In response to these declines, a large-scale repatriation program was established in Arizona and New Mexico to expand the distribution and abundance of native fishes. This program has had variable success, with imperiled fish populations establishing
-
Juvenile Pacific salmonid habitat use in two Puget Sound lowland rivers Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2024-01-22 Aaron T. David, Christopher N. Gregersen, Joshua S. Kubo, Daniel W. Lantz, James W. Bower
Large rivers are complex, productive environments that support numerous species. However, humans have extensively modified these ecosystems, contributing to the decline of Pacific salmonid Oncorhynchus spp. populations. Salmon recovery efforts rely upon an understanding of salmonid habitat needs at different life stages, but data on juvenile salmonid habitat use within large rivers are rare due to
-
Temperature- and ration-dependent winter growth in northern-stock Black Sea Bass juveniles Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-12-27 Max D. Zavell, Matthew E. P. Mouland, Catherine M. Matassa, Eric T. Schultz, Hannes Baumann
The northern stock of Black Sea Bass Centropristis striata has spatially expanded over the past decade, potentially due to warming northwest Atlantic Shelf waters affecting overwintering.
-
Effect of temperature on growth, survival, and chronic stress responses of Arctic Grayling juveniles Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-12-26 Javier-Alonso Carrillo-Longoria, Gibson Gaylord, Lukas Andrews, Madison Powell
Arctic Grayling Thymallus arcticus are Holarctically distributed, with a single native population in the conterminous United States occurring in the Big Hole River, Montana, where water temperatures can fluctuate throughout the year from 8°C to 18°C. A gradual increase in mean water temperature has been reported in this river over the past 20 years due to riparian habitat changes and climate change
-
Cisco population characteristics in Wisconsin lakes in relation to lake- and landscape-level factors Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-11-20 Daniel J. Dembkowski, Jeremiah S. Shrovnal, Timothy P. Parks, Greg G. Sass, John Lyons, Daniel A. Isermann
Declines in Cisco Coregonus artedi populations in some inland lakes have prompted assessments of Cisco occurrence and extirpation risk in relation to various stressors to identify refuge lakes and factors that promote Cisco persistence. However, most previous assessments have focused on presence–absence of Cisco rather than examining how population characteristics, such as relative abundance or growth
-
Predicting the likelihood of gas bubble trauma in fishes exposed to elevated total dissolved gas in the lower Clark Fork River, Idaho Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-11-20 Paul C. Kusnierz, Kenneth A. Bouwens, Andrew L. Ransom
Gas bubble trauma (GBT) can occur in fish when water becomes supersaturated with gases, with effects ranging from minor tissue damage to death. Laboratory studies suggest that fish exposure to elevated total dissolved gas (TDG) at depths that compensate for gas supersaturation can result in reduced GBT incidence and that different fish species exhibit varying susceptibility to GBT. Elevated TDG levels
-
Survival implications of diversion entrainment for out-migrating juvenile Chinook Salmon and steelhead Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-11-16 Tobias J. Kock, Scott D. Evans, Russell W. Perry, Patrick A. Monk, Michael S. Porter, Amy C. Hansen, Adam C. Pope
Efforts to ameliorate the negative effects of diversion dams on aquatic species of concern are important in rivers where water withdrawal supports agricultural economies, and they are likely to become increasingly important with impending climate change. A multi-year study was conducted to evaluate the survival consequences of diversion dam passage for juvenile Chinook Salmon Oncorhynchus tshawytscha
-
Reach-scale associations between introduced Brook Trout and juvenile and stream-resident Bull Trout in Idaho Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-11-03 Nicholas S. Voss, Brett J. Bowersox, Michael C. Quist
Native Bull Trout Salvelinus confluentus populations can be influenced by a variety of stressors operating at multiple spatial scales, making the relative importance of biotic versus abiotic controls difficult to discern at small scales where monitoring and management typically occur. Nonnative Brook Trout S. fontinalis were widely introduced throughout western North America and negatively affect Bull
-
Biological characteristics of inland Lake Whitefish populations in Ontario Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-25 Tim Haxton
To assess the biological characteristics of Lake Whitefish Coregonus clupeaformis within inland lakes in Ontario at multiple scales and test whether there have been any changes in relative abundance, measured by catch per unit effort, spatially and temporally over 15 years.
-
Molecular identification and environmental DNA detection of gill lice ectoparasites associated with Brook Trout declines Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-25 Aron D. Katz, Sasha J. Tetzlaff, Mark D. Johnson, John D. Noble, Steven Rood, Derek Maki, Jinelle H. Sperry
Gill lice Salmincola spp. are among the most widely reported parasites of freshwater salmonids and have been associated with recent declines in native Brook Trout Salvelinus fontinalis populations. Effective gill lice surveillance is vital for salmonid conservation success, but current survey approaches are often inadequate or problematic. We developed an environmental DNA (eDNA)-based approach to
-
Evaluating the effects of selective passage of migratory Westslope Cutthroat Trout on nonnative admixture Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-23 Anthony J. Dangora, Lisa A. Eby, Craig A. Barfoot, Andrew R. Whiteley
Hybridization with nonnative Rainbow Trout Oncorhynchus mykiss is a primary threat to the persistence of Westslope Cutthroat Trout O. clarkii lewisi. Managers concerned with conserving migratory populations of Westslope Cutthroat Trout in the presence of Rainbow Trout often face the predicament of tolerating the spread of hybridization, intentionally isolating Westslope Cutthroat Trout populations
-
Males die young, which may cause an Allee effect during a population collapse of the Vendace Coregonus albula Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-23 Timo J. Marjomäki, Pentti Valkeajärvi, Juha Karjalainen
We estimated the difference in mortality between mature male and female Vendace Coregonus albula based on a large data set of catch samples from 25 locations in Finland. We then used this estimate and age distribution data from Lake Etelä-Konnevesi to illustrate how the sex ratio (females per one male) might decrease as the average age of spawners increases during a several-year-long period of recruitment
-
Effects of light pollution on Bluegill foraging behavior Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-19 Susanna E. Harrison, Suzanne M. Gray
Artificial light at night (ALAN) is one of the most pervasive and rapidly expanding sources of anthropogenic pollution. Aquatic ecosystems may be especially vulnerable to the effects of ALAN due to their disproportionate exposure to anthropogenic pressures. However, research on mechanisms of response to ALAN by aquatic species remains sparse. Our research investigated the extent to which ALAN influences
-
Estimating the genetic diversity and potential influence of habitat segregation in Channel Catfish Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-10-01 Francesco H. Janzen, Gabriel Blouin-Demers
Individual habitat preference can reduce intraspecific competition for resources and may differ between age groups, sexes, and adult phenotypes. The Channel Catfish Ictalurus punctatus is a widespread species occurring in diverse freshwater habitats. This species displays breeding philopatry, returning to nesting sites occupied in previous years. Larger Channel Catfish tend to nest in the main channels
-
Assessing captive spawning strategies for supplementation production of Delta Smelt Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-28 Melanie E. F. LaCava, Isoline M. Donohue, Mary E. Badger, Tien-Chieh Hung, Luke Ellison, Md Moshiur Rahman, Kerry Kelvas, Amanda J. Finger, Evan W. Carson
To support the declining wild population of Delta Smelt, a conservation hatchery has expanded its mission from maintaining a backup population as insurance against extinction to also producing fish for release into the wild. The substantially higher production demands require a balance between producing large numbers of fish while adhering to conservation genetic principles that maximize retention
-
Seasonal spatial ecology of Lake Trout in Lake Erie Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-25 Tyler R. Funnell, Travis O. Brenden, Richard Kraus, Tom MacDougall, James Markham, Charles Murray, Jason Robinson, Christopher S. Vandergoot
Lake Trout Salvelinus namaycush are native coldwater apex predators that play an important role in maintaining ecosystem functionality and diversity in the Laurentian Great Lakes. Following population collapses, rehabilitation efforts were widely initiated in the Great Lakes to reestablish self-sustaining Lake Trout populations. Lake Erie may pose a challenge to these rehabilitation efforts due to
-
Reconciling zoogeography and genetics: Origins of deepwater Cisco Coregonus artedi (sensu lato) in the Great Lakes Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-22 Randy L. Eshenroder, Andy J. Breckenridge, Peter C. Jacobson
We propose that deepwater Cisco Coregonus artedi (sensu lato) survived Wisconsin ice advances through introgression with shallow-water Cisco ~65 ka followed by expression of introgressed genomic fragments after the last retreat of ice from the Great Lakes ~15 ka.
-
Genetic population structure of introduced and native lineages of kokanee in a large impounded watershed Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-21 Paige W. Breault, Mike Wetklo, Arne R. Langston, Randy J. Zemlak, Ruth E. Withler, J. Mark Shrimpton
The kokanee Oncorhynchus nerka (nonanadromous life-history form of Sockeye Salmon) uses lacustrine habitat in watersheds draining into the north Pacific Ocean. Kokanee also have been widely introduced into reservoirs following impoundment of rivers consequent to the construction of hydroelectric dams. Genetically divergent subpopulations of kokanee should be identified and evaluated when implementing
-
Demographic and genetic consequences of a steelhead supplementation program Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-16 Christian T. Smith, Racheal Headley, Matt Smith, Benjamen M. Kennedy, John Holmes, Melissa Nehmens, Brice Adams, Matthew Piteo, Jennifer Von Bargen
Supplementation of naturally spawning populations by the addition of hatchery-spawned individuals is commonly conducted for recovery of threatened and endangered populations and to support harvest opportunities. Our objective was to evaluate whether the use of a juvenile captive broodstock and an integrated paradigm could increase returns of steelhead, the anadromous form of Rainbow Trout Oncorhynchus
-
Movement of Paddlefish once past a lock-and-dam structure on the Alabama River Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-16 Byron D. Thomas, Dennis R. DeVries, Russell A. Wright, Matthew J. Catalano
Movement of fish past dams can be facilitated by dedicated fish passage structures, navigational locks, and crested spillways, with the efficacy of a passage structure depending strongly on the nature of the system (height of the dam, flow rate, etc.) and the fish's behavior and swimming capability. However, once the fish have passed a dam, whether by using a mitigation structure or due to active translocation
-
Eulachon migration patterns in the lower Fraser River revealed through acoustic telemetry Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-09-10 Christopher W. Burns, Pascale Gibeau, David Robichaud, Cameron McCulloch, Julio Novoa, Krystal Lockert
The Fraser River in British Columbia, Canada, historically supported productive Indigenous, recreational, and commercial fisheries for Eulachon Thaleichthys pacificus. Although Eulachon spend most of their lives in the marine environment, they spawn in freshwater and it is hypothesized that habitat degradation in the Fraser River has contributed to population decline. A greater understanding of Eulachon
-
Influence of invasive bigheaded carps on abundance of Gizzard Shad in the Tennessee River Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-08-17 Spencer VanderBloemen, Leandro E. Miranda, Greg G. Sass, Michael Colvin, Nicky Faucheux
The Tennessee River basin and its cascade of reservoirs are home to some of the most diverse freshwater fish assemblages in the world. This unique system is threatened by the ongoing invasion of Silver Carp Hypophthalmichthys molitrix and Bighead Carp H. nobilis, hereafter referred to together as “bigheaded carps.” Bigheaded carps may directly compete for food resources with native clupeid species
-
Long-term patterns of fish community structure and decline in native species in a Colorado River reservoir, Arizona and Nevada Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-08-03 Aaron A. Burgad, Brian R. Kesner, Paul C. Marsh
The Colorado River has undergone substantial anthropogenic modifications, and a suite of nonnative species have been introduced since the 1800s; consequently, native fish communities are severely imperiled. We examined temporal patterns in fish community structure in Lake Mohave (i.e., lower Colorado River basin) over 40 years from 1980 to 2020.
-
What makes anglers happy: A sentiment analysis of Walleye angler forums in the United States Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-07-28 Kirsten Vacura, Edward Camp, Paul Venturelli
We hypothesized online text can provide insight into the satisfaction of anglers who post on online forums.
-
Stray compositions of hatchery-origin Chinook Salmon and steelhead in natural spawning populations of the upper Columbia watershed Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-07-25 Todd N. Pearsons, Mark D. Miller
One of the biggest concerns of operating hatchery salmonid programs is high straying of returning adults into nontarget populations and the possible homogenization of genetic diversity among populations caused by spawning of stray fish. The composition of hatchery-origin stray Chinook Salmon Oncorhynchus tshawytscha and steelhead O. mykiss relative to the natural spawning populations, termed “recipient
-
Using state-space models to estimate recreational angling effort and infer processes that regulate angler dynamics Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-07-22 Joshua L. McCormick, John W. Heckel
State-space models are a flexible modeling approach and are often fit to ecological time series data exhibiting temporal autocorrelation. Traditionally, angler effort data collected using on-site creel surveys are analyzed using design-based methods. With some exceptions, state-space models are rarely used to model creel survey data that are also generally a time series of temporally autocorrelated
-
The effect of temperature and acute hypoxia/hyperoxia exposure on swimming performance and kinematics of Freshwater Drum Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-07-01 Colin Laubach, Dennis R. DeVries, Russell A. Wright, David L. Smith
Altered temperature and dissolved oxygen (DO) regimes in the tailwaters below dams can cause stress to fish. Despite their widespread distribution in rivers across North America, Freshwater Drum Aplodinotus grunniens have received little attention relative to the effects of these potential stressors. Quantifying fish swimming performance and kinematics in simulated tailwater conditions can help to
-
Influence of habitat and other factors on Largemouth Bass abundance in Lake Okeechobee, Florida Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-30 Charles G. Hanlon, Alyssa Jordan
Submerged aquatic vegetation (SAV) is an important part of shallow lake ecosystems. It provides protective cover and foraging habitat for age-0 and juvenile Largemouth Bass Micropterus salmoides and other small fish, creates structure and habitat for macroinvertebrates and other fauna, and can influence the physical environment by stabilizing sediments and reducing water column turbidity.
-
Using fish hard-part microchemistry and genetics to quantify population impacts of low-use lock-and-dam structures on the Alabama River Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-26 Garret J. Kratina, Dennis R. DeVries, Russell A. Wright, Eric Peatman, Steven J. Rider, Honggang Zhao
We used two approaches, fish hard-part microchemistry and genetics, to quantify effects of low-use lock-and-dam structures on riverine fish movement. Each approach varied in temporal scope, with microchemistry addressing effects within a lifetime and genetics addressing effects across generations.
-
Seasonal migration cues differ for dual-spawning Atlantic Sturgeon in the Great Pee Dee River Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-09 Colby D. Denison, Amy Cottrell, Troy M. Farmer, Dewayne A. Fox, David M. Hood, William C. Post, Gregory Sorg, Ellen Waldrop, Brandon K. Peoples
We investigated environmental variables associated with spawning migration behavior for a dual-spawning population of endangered Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus in the Great Pee Dee River, South Carolina.
-
Evaluating the influence of environmental and biological factors on migration behavior and residence duration of wild subyearling Chinook Salmon in a fjord estuary using miniature acoustic transmitters Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-07 Stephanie A. Lingard, Arthur L. Bass, Katrina V. Cook, Michelle Fortier, Geoffrey G. Price, Scott G. Hinch
Seaward migration and early marine residence are periods of high mortality in the lifecycle of Pacific salmon Oncorhynchus spp. The conservation of these species requires knowledge of habitat use patterns during early life to address survival bottlenecks. Using new miniaturized transmitters (V3 307-kHz tag; Innovasea Systems), we investigated the association between biological and environmental factors
-
A bioenergetics-based index of habitat suitability: Spatial dynamics of foraging constraints and food limitation for a rare estuarine fish Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-07 William E. Smith, Matthew L. Nobriga
Habitat suitability models can guide restoration efforts in freshwater and estuarine ecosystems by synthesizing important habitat attributes in a single index. Several important elements of the foraging arena of Delta Smelt Hypomesus transpacificus, a small, zooplanktivorous fish, were quantified using a model that combined bioenergetics with physical habitat attributes. We applied the model to evaluate
-
Opposing growth trends in juvenile and mature Humpback Whitefish within the upper Tanana River drainage, Alaska, revealed using otolith biochronology Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-06-05 Katie A. Drew, Randy J. Brown
Within areas of Alaska, Humpback Whitefish Coregonus pidschian are an important subsistence resource for many Alaska Native communities. Recently, Humpback Whitefish in the upper Tanana River drainage were reported to be smaller at a given age and reach smaller maximum sizes than fish sampled 20 years ago. The objective of this study was to identify the factors that influence annual growth of Humpback
-
A flooded future for River Chub? Future impacts of climate change and urbanization on reproduction of a keystone native fish species Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-05-05 Stanley J. Kemp, Mary J. Kemp
Predicted impacts of climate change in the eastern United States are pervasive and complex, including increased precipitation, increased frequency of heavy precipitation events, and altered seasonality of rainfall. This will potentially lead to increased flooding frequency and severity. The River Chub Nocomis micropogon is an important keystone and engineer species in the eastern United States, primarily
-
Use of environmental DNA to assess American Eel distribution, abundance, and barriers in a river–canal system Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-05-03 Scott D. George, Barry P. Baldigo, Christopher B. Rees, Meredith L. Bartron, John J. Wiley, Daniel S. Stich, Scott M. Wells, Dylan R. Winterhalter
The American Eel Anguilla rostrata historically was one of the most common fish species in Atlantic coast watersheds, but extensive dam construction and other factors caused a widespread population decline. One of the watersheds where American Eels have declined considerably is the Mohawk River in eastern and central New York. Recent attempts to characterize the distribution and abundance of American
-
River connectivity increases the diversity of fish communities in gravel pit lakes Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-04-18 Audrey R. Laiveling, Christopher N. Lorentz, Michael T. Booth
Off-channel floodplain features are important components of a river system that provide habitat and boost regional species pools, but river–floodplain connectivity is disrupted by anthropogenic activities. The Campbell Lakes in Harrison, Ohio, are formerly isolated gravel pits along the Whitewater River and are connected to the river through flooding-related erosion. The lakes were first stocked with
-
Effects of bigheaded carp on larval Freshwater Drum diets Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-04-16 Nathan A. Tillotson, Michael J. Weber, Clay L. Pierce
We investigated foraging success, diet composition, and the abundances of various prey taxa in the diets of larval Freshwater Drum Aplodinotus grunniens across a gradient of bigheaded carp (Bighead Carp Hypophthalmichthys nobilis and Silver Carp H. molitrix) relative abundance and in relation to zooplankton density, temperature, discharge, and larval fish densities in the upper Mississippi River (UMR)
-
Evaluating Muskellunge catch-and-release mortality at elevated summer water temperature Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-04-15 Ian Taylor Booth, Kyle J. Hartman, Derek Crane, Jeff Hansbarger, Jordan Weeks, Josh Henesy, Heather Walsh, Jeff Williams
Fisheries managers and anglers have expressed concerns regarding warmwater angling mortality, representing a need to evaluate mortality rates at various water temperatures and multiple latitudes. Up to 97% of Muskellunge Esox masquinongy caught by anglers are released, and previous research on catch and release (C&R) for Muskellunge has suggested relatively low mortality rates (0–5%). However, those
-
Vital rates of a burgeoning population of Humpback Chub in western Grand Canyon Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-04-14 Maria Dzul, Charles B. Yackulic, Mariah Giardina, David R. Van Haverbeke, Michael Yard
The Colorado River ecosystem has experienced habitat alterations and nonnative species invasions; as a result, many of its native species have had extirpations, abundance declines, and range constrictions. Despite these pitfalls, the Humpback Chub Gila cypha has persisted and in the last 10–15 years has expanded its range to become abundant in western Grand Canyon, a river segment in which it had been
-
Can spatial and temporal differences in fish assemblage structure inform conservation of an endangered sucker in a large western reservoir? Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-04-14 Casey A. Pennock, Brandon Albrecht, Ronald J. Rogers, Mark C. McKinstry
Conversion of lotic to lentic habitat after river impoundment can lead to habitat loss and threats from introduced species to native aquatic organisms. Some native species can persist in reservoirs despite these alterations. Some of the largest reservoirs in North America were constructed in the Colorado River basin and are used by endangered Razorback Sucker Xyrauchen texanus. This species successfully
-
Timing and route of migration of mature female blue crabs in a large, wind-driven estuary Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-03-30 Geoffrey W. Bell, David B. Eggleston
Quantify the timing of mature female blue crab Callinectes sapidus migration and the routes they take in the Croatan, Albemarle, and Pamlico Estuarine System (CAPES) in North Carolina, USA.
-
Can thermal refuges save salmonids? Simulation of cold-pool benefits to salmonid populations Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-03-11 Steven F. Railsback, Bret C. Harvey
The literature on thermal refuges has focused on when fish use what kinds of refuge, but we address how refuge availability and characteristics affect population abundance and persistence under warming.
-
Distribution and straying of minijack Chinook Salmon released from a captive broodstock hatchery program Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-03-09 Todd N. Pearsons, Peter J. Graf, Timothy N. Taylor
Production of Chinook Salmon Oncorhynchus tshawytscha in hatcheries can unintentionally produce large numbers of age-1 males, termed "minijacks," which pose ecological and genetic risks to target and nontarget populations. We evaluated the postrelease distribution of minijacks produced in a hatchery captive broodstock program targeting the White River in the Columbia River basin between 2010 and 2015
-
Resiliency of Apache Trout habitats in a warmer and drier climate future Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-03-04 Daniel C. Dauwalter, Rosalinda Gonzalez, Tim Gatewood, Zachary S. Beard, Zachary Jackson
The Southwest has the hottest and driest climate in the United States, and projections show that it will only get hotter and drier into the 2100s. The Apache Trout Oncorhynchus apache is native to the Southwest and is currently listed as threatened under the U.S. Endangered Species Act. Our goals were to understand how climate factors influence the distribution of juvenile Apache Trout (<125 mm TL)
-
Molecular phylogenetic and population genetic relationships of a putative species of sucker (Catostomus sp.) from Surprise Valley in the Great Basin, USA Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-02-14 Matthew A. Campbell, Mary E. Badger, Nick Buckmaster, Andrew B. Starostka, Travis Hawks, Amanda J. Finger
The ichthyofaunal diversity of the Great Basin is incompletely characterized, with the Wall Canyon Sucker Catostomus sp. being one potential species. The Wall Canyon Sucker is limited in distribution to the Wall Canyon drainage of Surprise Valley, Washoe County, Nevada, USA. It was first documented and collected by C. L. Hubbs and R. R. Miller in 1934, and no species description has been published
-
The effects of environmental and biological factors on the length of Atlantic Salmon age-1+ parr in three Maine drainages Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-02-02 Athena Ryan, John F. Kocik, Ernest J. Atkinson, Nathan B. Furey
Atlantic Salmon Salmo salar in the United States have been the focus of recovery efforts for over 150 years, but long-term analyses of juvenile demographics are limited. We examined how parr size (fork length [FL]) varied across three Maine drainages (East Machias, Narraguagus, and Sheepscot rivers) during 1980–2014 and was affected by habitat and biological variables using a long-term electrofishing
-
Genomic evaluation of native Walleye in the Appalachian region and the effects of stocking Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-02-02 Andrew Johnson, Katherine Zipfel, Eric Hallerman, Wade Massure, Peter Euclide, Amy Welsh
Create a quicker and more accurate genetic assignment tool for Walleye Sander vitreus broodstock in the Eastern Highlands region and to quantify genetic diversity of four Walleye populations using next-generation sequencing.
-
Bioenergetics model for the nonnative Redside Shiner Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-22 Rachelle C. Johnson, David A. Beauchamp, Julian D. Olden
Redside Shiner Richardsonius balteatus has expanded from its native range in the Pacific Northwest region of North America to establish populations in six other western states. This expansion has fueled concerns regarding competition between Redside Shiner and native species, including salmonids. We developed a bioenergetic model for Redside Shiner, providing a powerful tool to quantify its trophic
-
Comparison of traditional and geometric morphometrics using Lake Huron ciscoes of the Coregonus artedi complex Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-18 Benjamin E. Martin, Brian O'Malley, Randy L. Eshenroder, Yu-Chun Kao, Chris M. Olds, Timothy P. O'Brien, Chris L. Davis
Here we determine how traditional morphometrics (TM) compares with geometric morphometrics (GM) in discriminating among morphologies of four forms of ciscoes of the Coregonus artedi complex collected from Lake Huron.
-
The effect of reducing dietary lipid and food availability on precocious male maturation in Chinook Salmon: A production-scale hatchery experiment Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-10 Deborah L. Harstad, Donald A. Larsen, Lance Clarke, Dina K. Spangenberg, Robert Hogg, Brett Requa, Brian R. Beckman
Age of maturation in Chinook Salmon Oncorhynchus tshawytscha is phenotypically plastic, influenced by both genotype and environmental factors, including the availability and composition of the diet. Salmon hatchery programs often rear fish under accelerated growth regimes using high-lipid diets that can result in earlier age at maturity, including increased prevalence of age-2 males (minijacks). The
-
Association of an endemic leuciscid, the Sandhills Chub, with microhabitat features and watershed-level habitat characteristics Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-09 Garrett M. Herigan, Derek P. Crane, Mark C. Scott
Habitat alteration is the greatest threat to fishes globally, and freshwater fishes are particularly vulnerable to habitat alteration because freshwater ecosystems are more closely integrated with the human landscape than marine ecosystems. Headwater streams comprise the majority of stream length within a watershed and provide unique habitats for a variety of aquatic organisms, thus contributing to
-
Spatial and temporal variation in exploitation rates of the Louisiana blue crab spawning stock Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-06 Helen D. Olmi-Graham, M. Zachary Darnell
Blue crabs Callinectes sapidus support one of our nation's most valuable fisheries, and Louisiana has led national landings from 2012 to 2021. Fishery-independent estimates of abundance have declined in recent years; in 2015, the Louisiana spawning stock biomass reached the lowest point ever recorded. Management efforts for the blue crab spawning stock have been hindered by incomplete knowledge of
-
A comparison of methods for estimating juvenile salmon habitat capacity to assist with restoration planning and evaluation Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-05 Philip Roni, Meghan J. Camp, Kristin Connelly, Kai Ross, Hans Berge
A variety of analytical approaches have been developed in recent years to estimate salmon Oncorhynchus spp. freshwater habitat capacity to assist with planning and evaluating habitat restoration. We compared and contrasted seven different methods for estimating juvenile Chinook Salmon O. tshawytscha habitat rearing capacity (total number of fish that a given area of habitat can support), abundance
-
Hatchery supplementation increases potential spawning stock of Rio Grande Silvery Minnow after population bottlenecks Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2023-01-05 Thomas P. Archdeacon, Robert K. Dudley, W. Jason Remshardt, William Knight, Manuel Ulibarri, Eric J. Gonzales
Supplementation of imperiled wild fish stocks with captively raised fish is a commonly used conservation tool. Programs designed to maintain or improve fish populations through supplementation should be evaluated to determine whether they are meeting conservation objectives. The Rio Grande Silvery Minnow Hybognathus amarus is a small-bodied, endangered minnow endemic to the Rio Grande basin of the
-
Swimming depths and water temperatures encountered by radio-archival-tagged Chinook Salmon during their spawning migration in the Yukon River basin Trans. Am. Fish. Soc. (IF 1.4) Pub Date : 2022-12-22 John H. Eiler, Michele M. Masuda, Allison N. Evans
Historically, Chinook Salmon Oncorhynchus tshawytscha have supported important fisheries throughout the Yukon River basin, but dramatic declines in abundance since the late 1990s have resulted in smaller returns, severe reductions in harvests, and difficulties in meeting escapement goals. These observations coincide with major climatic changes in the northern Pacific, characterized by a general warming