scholarly journals Updating movement estimates for American black ducks (Anas rubripes)

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1787 ◽  
Author(s):  
Orin J. Robinson ◽  
Conor P. McGowan ◽  
Patrick K. Devers
Keyword(s):  
Atlantic Coast ◽  
The United States ◽  
Future Research ◽  
Harvest Management ◽  
Anas Rubripes ◽  
Management Actions ◽  
The North ◽  
Movement Data ◽  
Continental Population ◽  
American Black

Understanding migratory connectivity for species of concern is of great importance if we are to implement management aimed at conserving them. New methods are improving our understanding of migration; however, banding (ringing) data is by far the most widely available and accessible movement data for researchers. Here, we use band recovery data for American black ducks (Anas rubripes) from 1951–2011 and analyze their movement among seven management regions using a hierarchical Bayesian framework. We showed that black ducks generally exhibit flyway fidelity, and that many black ducks, regardless of breeding region, stopover or overwinter on the Atlantic coast of the United States. We also show that a non-trivial portion of the continental black duck population either does not move at all or moves to the north during the fall migration (they typically move to the south). The results of this analysis will be used in a projection modeling context to evaluate how habitat or harvest management actions in one region would propagate throughout the continental population of black ducks. This analysis may provide a guide for future research and help inform management efforts for black ducks as well as other migratory species.

scholarly journals Cold Climate Winegrape Cultivar Sensitivity to Sulfur in the Northern Great Plains Region of the United States

2017 ◽  
Vol 27 (2) ◽  
pp. 235-239
Author(s):  
Nagehan D. Köycü ◽  
John E. Stenger ◽  
Harlene M. Hatterman-Valenti
Keyword(s):  
United States ◽  
Great Plains ◽  
The United States ◽  
Organic Production ◽  
Cold Climate ◽  
Future Research ◽  
Northern Great Plains ◽  
Research Station ◽  
Injury Incidence ◽  
The North

Elemental sulfur is commonly applied for powdery mildew (Erysiphe necator) protection on winegrape (Vitis sp.). The product may be used in a diversified, integrated disease management system to help prevent fungicide resistance to products with other modes of action. Additionally, sulfur may be used as a control option in organic systems. Applications of sulfur have been known to cause phytotoxic injury to susceptible winegrape cultivars, particularly those stemming from fox grape (Vitis labrusca) parentage. To improve recommendations to producers in the northern Great Plains region of the United States, a comparison of injury incidence and severity, as well as effects on yield characteristics was undertaken for 13 regional cultivars exposed to three sulfur rates (0, 2.4, and 4.8 lb/acre a.i.) at a North Dakota State University Research Station near Absaraka, ND. Overall, four cultivars (Bluebell, Baltica, Sabrevois, and King of the North) of the 13 cultivars tested showed phytotoxic symptoms. Injury severity and incidence of these cultivars differed between years and across rates. ‘Bluebell’ showed consistent and severe sulfur injury symptoms. Injury to the other three susceptible cultivars tended to vary by the given environment, with King of the North generally showing the lowest injury response. Injury symptoms were not found to be associated with the overall yield or cluster weight. Results suggest that alternative spray programs that exclude sulfur-based fungicides should be recommended for ‘Bluebell’, ‘Baltica’, ‘Sabrevois’, and ‘King of the North’, whereas sulfur-based fungicides may be applied to ‘Alpenglow’, ‘ES 12-6-18’, ‘Frontenac’, ‘Frontenac Gris’, ‘La Crescent’, ‘Marquette’, ‘Somerset Seedless’, ‘St. Croix’, and ‘Valiant’. Observations on fruit ripening in 2014 suggest that future research is needed to determine if a reduction of fruit quality may occur in some seasons with repeated sulfur applications or with successive annual sulfur applications for susceptible cultivars if used in an organic production system.

scholarly journals The North Atlantic Coast Fisheries Arbitration

1911 ◽  
Vol 5 (1) ◽  
pp. 1-31 ◽  
Author(s):  
Robert Lansing
Keyword(s):  
United States ◽  
North Atlantic ◽  
Atlantic Coast ◽  
The United States ◽  
Arbitral Tribunal ◽  
The Past ◽  
The North ◽  
The Hague ◽  
The North Atlantic ◽  
Constant Source

The Arbitral Tribunal of the Permanent Court at The Hague, by its award of the 7th of last September, in the case of the North Atlantic Coast Fisheries, brought to a close a controversy which in its various phases has been an almost constant source of vexatious dispute between the United States and Great Britain for the past seventy years.A treaty, granting exceptional rights, such as that which this Tribunal was called upon to consider, is peculiarly susceptible to different interpretations as the course of time brings new conditions not contemplated by its negotiators. The relations of the parties are changed. A liberty which at the date of the treaty was considered indispensable may become worthless, while one which was deemed insignificant may in years assume a place of vital importance to the beneficiaries under the grant. This change of conditions and of the value of rights has been especially true of the liberties acquired by the United States for its inhabitants under the first article of the Treaty of October 20, 1818.

scholarly journals Epidemiology of a Phocine Distemper Virus Outbreak Along the North Atlantic Coast of the United States

2017 ◽  
Vol 43 (3) ◽  
pp. 254-263 ◽  
Author(s):  
Jennifer L. Siembieda ◽  
Ailsa J. Hall ◽  
Frances M. D. Gulland ◽  
Teri Rowles ◽  
Mendy Garron ◽  
...  
Keyword(s):  
United States ◽  
North Atlantic ◽  
Atlantic Coast ◽  
The United States ◽  
The North ◽  
Phocine Distemper Virus ◽  
The North Atlantic

Towards operational quantification of GHG exchange in heterogeneous agricultural landscapes and experimental plots

2020 ◽  
Author(s):  
Bart Kruijt ◽  
Reinder Nouta ◽  
Cor Jacobs ◽  
Merit van den Berg ◽  
Christian Fritz ◽  
...  
Keyword(s):  
Land Use ◽  
Eddy Covariance ◽  
Agricultural Landscape ◽  
Test Site ◽  
Agricultural Landscapes ◽  
Future Research ◽  
Management Actions ◽  
The North ◽  
Eddy Covariance Measurements ◽  
Regional Authorities

<p>With the increasing  need to mitigate rising atmospheric greenhouse gas (GHG) concentrations more attention is being directed at the quantification  of the GHG exchange characteristics of heterogenous landscape assemblages that vary in land cover and land use.   Whilst emission-limiting or uptake-enhancing management actions are often being proposed for specific land use most remain to be experimentally tested and  validated at the landscape scale. This is a challenge because the typical size of different landscape elements  (fields, afforested areas and unmanaged land at hectare scale) or experimental fields where emission reduction measures are being tested, is at the lower limit of what micrometeorological techniques such as eddy covariance measurements can deal with. With large heterogeneity the use  of chamber measurements is also limited. The investments to be made in equipment are a challenge for operational monitoring of GHG budgets.</p><p>To address this we assess the feasibility of several options to acquire appropriate data in a way that is achievable for stakeholders, such as land managers and regional authorities. We use existing and new flux data from an agricultural landscape in the North of the Netherlands  to: 1) compare paired eddy covariance (EC) data and automatic chamber (AC) data to test the representativity of small footprints. Results from a test site on drained meadows show almost identical CO<sub>2</sub> fluxes. Future research should compare grass length and soil moisture of EC- and AC footprints; 2) test simplified alternatives to EC, such as those relying on concentration variances. Data from the peat meadow site suggest that time-averaged fluxes can be estimated in an empirical way with reasonable accuracy from concentration variances; 3) analyze the value of information gathered with mobile, roving/temporary EC approaches interpolated with gap filling models. The indications are  that the values and variability of fluxes is largely  conserved and predictable within seasons In all these analyses, we will consider the tradeoffs between the need for accuracy and pragmatism in operational practice.</p>

scholarly journals Exploring Winery Visitors in the Emerging Wine Regions of the North Central United States

2020 ◽  
Vol 12 (4) ◽  
pp. 1642 ◽  
Author(s):  
Jenni Soo-Hee Lee ◽  
Dan McCole ◽  
Don Holecek
Keyword(s):  
United States ◽  
Structural Equation ◽  
Online Survey ◽  
The United States ◽  
Equation Modeling ◽  
Future Research ◽  
Wine Quality ◽  
The North ◽  
Central United States ◽  
E Mail

Most of the pioneering studies related to wineries were conducted in famous wine regions, the results of which were not especially applicable to the small and emerging wineries in the United States. These wineries rely heavily on visitors’ on-site purchases; this highlights the importance of understanding winery visitors’ behaviors. This study explored the sequential relationships among winery visitors’ pre-trip characteristics (motivation, wine involvement), on-site experiences (perceived value), and post-trip evaluations (satisfaction, place attachment, winery loyalty). Intercepted winery visitors provided their e-mail addresses and were sent an online survey. Partial-least-squares structural equation modeling results showed that leisure-motivated and low wine-involved visitors perceive more diverse values in their winery experiences. Visitors’ perceived services, social benefits, and wine-quality values contributed to the positive post-trip evaluations. Winery owners stand to benefit from this research by being able to design winery experiences that are highly valued. Limitations are discussed and future research is suggested.

scholarly journals SEASONAL CHANGES IN BEACHES OP THE NORTH ATLANTIC COAST OF THE UNITED STATES

1964 ◽  
Vol 1 (9) ◽  
pp. 15 ◽  
Author(s):  
John M. Darling
Keyword(s):  
United States ◽  
Rhode Island ◽  
North Atlantic ◽  
Seasonal Changes ◽  
East Coast ◽  
Atlantic Coast ◽  
The United States ◽  
Beach Profile ◽  
The North ◽  
Seasonal Basis

Seasonal changes of eight Atlantic Ocean beaches along the East Coast of the United States from southern New Jersey to Rhode Island have been under study since September 1962. These beaches are surveyed at frequent intervals repeating profile lines perpendicular to the shoreline, spaced to indicate any major changes occurring to the beach shape or dimensions with as much assurance as is reasonably possible. Correlation of changes in beach profile with tide and wave data is being made. Changes in the beach profiles to date indicate variations on a seasonal basis.

scholarly journals A Survey of Cannabis Use in a Large US-Based Cohort of People with Multiple Sclerosis

2021 ◽  
Vol 23 (6) ◽  
pp. 245-252
Author(s):  
Amber Salter ◽  
Robert J. Fox ◽  
Gary Cutter ◽  
Ruth Ann Marrie ◽  
Kate E. Nichol ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Sleep Problems ◽  
Safety Data ◽  
The United States ◽  
Cannabis Use ◽  
Future Research ◽  
Research Committee ◽  
The North ◽  
American Research ◽  
Lower Education

Abstract Background: As cannabis products become increasingly accessible across the United States, it is important to understand the contemporary use of cannabis for managing multiple sclerosis (MS) symptoms. Methods: We invited participants with MS from the North American Research Committee on Multiple Sclerosis (NARCOMS) Registry (aged 18 years or older) to complete a supplemental survey on cannabis use between March and April 2020. Participants reported cannabis use, treated symptoms, patterns, preferences, methods of use, and the factors limiting use. Findings are reported using descriptive statistics. Results: Of the 6934 participants invited, 3249 responded. Of the respondents, 31% reported having ever used cannabis to treat MS symptoms, with 20% currently using cannabis. The remaining 69% had never used cannabis for MS symptoms, for reasons including not enough data about efficacy (40%) and safety (27%), and concerns about legality (25%) and cost (18%). The most common symptoms current users were attempting to treat were spasticity (80%), pain (69%), and sleep problems (61%). Ever users (vs never users) were more likely to be younger, be non-White, have lower education, reside in the Northeast and West, be unemployed, be younger at symptom onset, be currently smoking, and have higher levels of disability and MS-related symptoms (all P < .001). Conclusions: Despite concerns about insufficient safety and efficacy data, legality, and cost, almost one-third of NARCOMS Registry respondents report having tried nonprescription cannabis products in an attempt to alleviate their symptoms. Given the lack of efficacy and safety data on such products, future research in this area is warranted.

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