Habitat use by Harlequin Ducks breeding in Hebron Fiord, Labrador

1998 ◽  
Vol 76 (5) ◽  
pp. 897-901 ◽  
Author(s):  
Michael S Rodway
Keyword(s):  
Vegetation Cover ◽  
Benthic Invertebrate ◽  
Breeding Habitat ◽  
Habitat Characteristics ◽  
Habitat Requirements ◽  
North American Population ◽  
American Population ◽  
Invertebrate Fauna ◽  
Chironomid Larvae ◽  
Harlequin Ducks

Understanding of breeding habitat requirements is vital to recovery plans for the endangered eastern North American population of Harlequin Ducks (Histrionicus histrionicus). I compared habitat characteristics and benthic invertebrate fauna between streams in Hebron Fiord, Labrador, used and unused by Harlequin Ducks in 1996. Used streams were narrower, had higher pH and temperature, a larger substrate, steeper shorelines, and greater vegetation cover on islands and shorelines than unused streams. Greater numbers of invertebrates were recovered from kick samples, simuliid larvae and plecopteran nymphs were more frequent, and chironomid larvae and emphemeropteran nymphs were less frequent in used than in unused streams. Results from this study will help focus future survey and conservation efforts.

scholarly journals PREVALENCE AND PREDICTORS OF PREMATURE DISCONTINUATION OF CLOPIDOGREL AFTER DRUG-ELUTING STENT IMPLANTATION IN A NORTH AMERICAN POPULATION

2011 ◽  
Vol 57 (14) ◽  
pp. E1924
Author(s):  
Ana Laynez Carnicero ◽  
Michael A. Gaglia ◽  
Kohei Wakabayashi ◽  
Rafael Romaguera ◽  
Gabriel Maluenda ◽  
...  
Keyword(s):  
North American ◽  
Stent Implantation ◽  
Drug Eluting Stent ◽  
North American Population ◽  
American Population ◽  
Drug Eluting

scholarly journals Left-Sided Sigmoid Diverticulitis Presenting as Right-Sided Thigh Abscess

2013 ◽  
Vol 97 (4) ◽  
pp. 285-287 ◽  
Author(s):  
Patrick Bates Murphy ◽  
Paul Belliveau
Keyword(s):  
Diverticular Disease ◽  
Gastrointestinal Symptoms ◽  
Sigmoid Diverticulitis ◽  
North American Population ◽  
American Population ◽  
The North ◽  
Colocutaneous Fistula ◽  
Atypical Presentations ◽  
Thigh Abscess ◽  
Uncommon Complication

Abstract Acquired diverticular disease of the colon is very common in the North American population. Atypical presentations are usually due to complications and rarely the predominant complaint may be related to an associated fistula. Thigh abscesses due to colocutaneous fistula represent an uncommon complication of sigmoid diverticulitis. In rare cases, a thigh abscess may be the only symptom, but gas in the thigh should raise the index of suspicion for bowel pathology. We report the second known case of a left-sided sigmoid diverticulitis leading to an isolated right thigh abscess with no gastrointestinal symptoms.

Chronic Fatigue Immune Dysfunction Syndrome: An Epidemic?

PEDIATRICS ◽  
1992 ◽  
Vol 89 (4) ◽  
pp. 802-803
Author(s):  
J. VAN AERDE
Keyword(s):  
Chronic Fatigue Syndrome ◽  
Disease Control ◽  
Immune Dysfunction ◽  
Chronic Fatigue ◽  
Myalgic Encephalomyelitis ◽  
North American Population ◽  
American Population ◽  
The North ◽  
Fatigue Syndrome ◽  
Minor Criteria

To the Editor.— Chronic Fatigue Immune Dysfunction Syndrome (CFIDS) or Myalgic Encephalomyelitis (M.E.) is a debilitating neuroimmune disorder which is taking on epidemic proportions. Some estimates indicate that 5% of the North American population might become affected this decade. Smith et al1 confuse the symptom of "chronic fatigue" with the disease "chronic fatigue syndrome" The terminology is mixed up throughout the entire paper, but the authors clearly report on the symptom only. According to the Centers for Disease Control (CDC), the patient has to meet two major and eight minor criteria to be diagnosed with CFIDS.

C.P.3.01 LGMD2I in a North American population

2007 ◽  
Vol 17 (9-10) ◽  
pp. 869
Author(s):  
C. Feener ◽  
P. Kang ◽  
E. Estrella ◽  
B. Darras ◽  
A. Amato ◽  
...  
Keyword(s):  
North American ◽  
North American Population ◽  
American Population

scholarly journals Habitat Type Influences Danaus plexippus (Lepidoptera: Nymphalidae) Oviposition and Egg Survival on Asclepias syriaca (Gentianales: Apocynaceae)

2019 ◽  
Vol 48 (3) ◽  
pp. 675-684 ◽  
Author(s):  
Andrew Myers ◽  
Christie A Bahlai ◽  
Douglas A Landis
Keyword(s):  
Oviposition Preference ◽  
Habitat Type ◽  
Danaus Plexippus ◽  
Agricultural Landscapes ◽  
Breeding Habitat ◽  
North American Population ◽  
Asclepias Syriaca ◽  
Egg Predation ◽  
Row Crops ◽  
Predation Rates

AbstractAs agricultural practices intensify, species once common in agricultural landscapes are declining in abundance. One such species is the monarch butterfly (Danaus plexippus L.), whose eastern North American population has decreased approximately 80% during the past 20 yr. One hypothesis explaining the monarch’s decline is reduced breeding habitat via loss of common milkweed (Asclepias syriaca L.) from agricultural landscapes in the north central United States due to the adoption of herbicide-tolerant row crops. Current efforts to enhance monarch breeding habitat primarily involve restoring milkweed in perennial grasslands. However, prior surveys found fewer monarch eggs on common milkweed in grassland versus crop habitats, indicating potential preference for oviposition in row crop habitats, or alternatively, greater egg loss to predation in grasslands. We tested these alternative mechanisms by measuring oviposition and egg predation on potted A. syriaca host plants. Our study revealed that habitat context influences both monarch oviposition preference and egg predation rates and that these patterns vary by year. We found higher monarch egg predation rates during the first 24 h after exposure and that much of the predation occurs at night. Overall, we documented up to 90% egg mortality over 72 h in perennial grasslands, while predation rates in corn were lower (10–30% mortality) and more consistent between years. These findings demonstrate that weekly monarch egg surveys are too infrequent to distinguish oviposition habitat preferences from losses due to egg predation and suggest that monarch restoration efforts need to provide both attractive and safe habitats for monarch reproduction.

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