Long‐term increases in shell thickness in Elliptio complanata (Bivalvia: Unionidae) in the freshwater tidal Hudson River

2021 ◽  
Author(s):  
David L. Strayer ◽  
Stephen K. Hamilton ◽  
Heather M. Malcom
Keyword(s):  
Shell Thickness ◽  
Hudson River ◽  
Elliptio Complanata

scholarly journals Long‐term variability and density dependence in Hudson River Dreissena populations

2019 ◽  
Vol 65 (3) ◽  
pp. 474-489 ◽  
Author(s):  
David L. Strayer ◽  
David T. Fischer ◽  
Stephen K. Hamilton ◽  
Heather M. Malcom ◽  
Michael L. Pace ◽  
...  
Keyword(s):  
Density Dependence ◽  
Hudson River

Interannual and long-term variation in the nearshore fish community of the mesohaline Hudson River estuary

Estuaries ◽  
2004 ◽  
Vol 27 (4) ◽  
pp. 659-669 ◽  
Author(s):  
Thomas P. Hurst ◽  
Kim A. McKown ◽  
David O. Conover
Keyword(s):  
Fish Community ◽  
River Estuary ◽  
Hudson River ◽  
Hudson River Estuary ◽  
Term Variation

scholarly journals Genomic analyses of Northern snakehead (Channa argus) populations in North America

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e4581 ◽  
Author(s):  
Carlee A. Resh ◽  
Matthew P. Galaska ◽  
Andrew R. Mahon
Keyword(s):  
United States ◽  
Invasive Species ◽  
River Basin ◽  
Hudson River ◽  
The United States ◽  
Aquatic Invasive Species ◽  
Potomac River ◽  
Potomac River Basin ◽  
Channa Argus

Background The introduction of northern snakehead (Channa argus; Anabantiformes: Channidae) and their subsequent expansion is one of many problematic biological invasions in the United States. This harmful aquatic invasive species has become established in various parts of the eastern United States, including the Potomac River basin, and has recently become established in the Mississippi River basin in Arkansas. Effective management of C. argus and prevention of its further spread depends upon knowledge of current population structure in the United States. Methods Novel methods for invasive species using whole genomic scans provide unprecedented levels of data, which are able to investigate fine scale differences between and within populations of organisms. In this study, we utilize 2b-RAD genomic sequencing to recover 1,007 single-nucleotide polymorphism (SNP) loci from genomic DNA extracted from 165 C. argus individuals: 147 individuals sampled along the East Coast of the United States and 18 individuals sampled throughout Arkansas. Results Analysis of those SNP loci help to resolve existing population structure and recover five genetically distinct populations of C. argus in the United States. Additionally, information from the SNP loci enable us to begin to calculate the long-term effective population size ranges of this harmful aquatic invasive species. We estimate long-term Ne to be 1,840,000–18,400,000 for the Upper Hudson River basin, 4,537,500–45,375,000 for the Lower Hudson River basin, 3,422,500–34,225,000 for the Potomac River basin, 2,715,000–7,150,000 for Philadelphia, and 2,580,000–25,800,000 for Arkansas populations. Discussion and Conclusions This work provides evidence for the presence of more genetic populations than previously estimated and estimates population size, showing the invasive potential of C. argus in the United States. The valuable information gained from this study will allow effective management of the existing populations to avoid expansion and possibly enable future eradication efforts.

From Catastrophe to Recovery: Stories of Fishery Management Success

2019 ◽  
Keyword(s):  
Striped Bass ◽  
Fishery Management ◽  
Hudson River ◽  
Management Plan ◽  
Lessons Learned ◽  
Juvenile Abundance ◽  
Spawning Stock ◽  
Long Term Monitoring ◽  
Term Monitoring

<i>Abstract</i>.—The Striped Bass <i>Morone saxatilis</i> is an extremely important commercial and recreational species with a coastal migratory stock in the United States referred to as “Atlantic Striped Bass” managed by the Atlantic States Marine Fisheries Commission (ASMFC). Atlantic Striped Bass has four major contributing stocks, including the Chesapeake Bay, which comprises 70–90%, and the Hudson River, the Delaware River, and the Albemarle Sound/Roanoke River (A/R). The collapse of Atlantic Striped Bass in the late 1970s precipitated federal funding and legislation like the Emergency Striped Bass Study for research on causative factors of the decline and potential management recommendations. The 1981 ASMFC Interstate Fishery Management Plan (ISFMP) for Atlantic Striped Bass was nonmandatory and mostly ineffective until the 1984 Atlantic Striped Bass Conservation Act provided regulatory authorities to the ASMFC and the federal government to close fisheries in states out of compliance with ISFMPs. Restrictions and moratoria on harvest imposed in several states reduced mortality, and under favorable environmental conditions and given Striped Bass life history, multiple years of good recruitment occurred. This allowed target thresholds for female spawning stock biomass to be achieved and the ASMFC to declare recoveries of Atlantic Striped Bass stocks from 1995 to 1998. Regulation of river flows was particularly important for the A/R stock recovery, and this stock is presented as a case study. During the 20+ years following recovery, long-term monitoring by states in support of adaptive management was primarily supported by the stable, nonappropriated funding of the Sport Fish Restoration Act. Monitoring includes spawning stock characterization and biomass estimation, juvenile abundance surveys, cooperative coastwide tagging, and harvest data collection. Future issues facing the recovered Atlantic Striped Bass include interspecies effects of relatively high abundance, management of stocks separately instead of as a single coastal stock, and ecosystem-based fisheries management. Key lessons learned in the Atlantic Striped Bass recovery are that high societal value of the species provided the political impetus to create and fund the recovery program, coordination of management and enforcement efforts among all jurisdictions was essential for this migratory species, and fully funded long-term monitoring programs are critical to adaptive population management.

scholarly journals Susceptibility of Ixodes scapularis (Acari: Ixodidae) to Permethrin Under a Long-Term 4-Poster Deer Treatment Area on Shelter Island, NY

2021 ◽  
Author(s):  
James C Burtis ◽  
Joseph D Poggi ◽  
Beau Payne ◽  
Scott R Campbell ◽  
Laura C Harrington
Keyword(s):  
Ixodes Scapularis ◽  
Hudson River ◽  
Tick Control ◽  
Treatment Area ◽  
Hudson Valley ◽  
Laboratory Colony ◽  
Management Area ◽  
Pressure Resistance ◽  
Tick Vectors

Abstract Pesticide resistance in medically significant disease vectors can negatively impact the efficacy of control efforts. Resistance research on ticks has focused primarily on species of veterinary significance that experience relatively high degrees of control pressure. Resistance in tick vectors of medical significance has received little attention, in part because area-wide pesticide applications are not used to control these generalist tick species. One of the few effective methods currently used for area-wide control of medically important ticks, including Ixodes scapularis Say (Acari: Ixodidae), is deployment of 4-poster devices. Deer self-apply a topical acaricide (permethrin) while feeding on corn from the devices. A 4-poster program using permethrin has been deployed on Shelter Island, NY to control I. scapularis populations since 2008. We collected engorged female ticks from deer in this management area and a location in the Mid-Hudson River Valley, NY without area-wide tick control. Larvae were reared from egg masses and their susceptibility to permethrin was tested. Larvae originating from a long-term laboratory colony were used as a susceptible baseline for comparison. Compared against the laboratory colony, resistance ratios at LC-50 for Shelter Island and Hudson Valley I. scapularis were 1.87 and 1.51, respectively. The susceptibilities of the field populations to permethrin were significantly lower than that of the colony ticks. We provide the first data using the larval packet test to establish baseline susceptibility for I. scapularis to permethrin along with information relevant to understanding resistance emergence in tick populations under sustained control pressure from 4-poster devices.

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