Oogenesis in a North American population of Aedes (Finlaya) togoi (Theobald) (Diptera: Culicidae)

1985 ◽  
Vol 63 (9) ◽  
pp. 2168-2171 ◽  
Author(s):  
Kathryn M. McGinnis ◽  
Reinhart A. Brust
Keyword(s):  
North American ◽  
Blood Meal ◽  
Blood Feeding ◽  
North American Population ◽  
American Population ◽  
Female Population ◽  
Host Seeking ◽  
Laboratory Colony ◽  
Aedes Togoi

The expression of autogeny in Aedes togoi and its timing are highly variable. Autogenous females, fed 10% sucrose and maintained at 24 °C with a photoperiod of 17.5 h light: 6.5 h dark, developed mature eggs between 5 and 30 days after eclosion. The percent autogeny in a population from Vancouver, B.C., collected as larvae from the field (P1 generation) was 42% ([Formula: see text] eggs/female); the percent autogeny in the laboratory F2 generation, unselected for autogeny, was 40% ([Formula: see text] eggs/female). In the laboratory colony, the process of maturing follicles to the egg stage was frequently delayed. Some females (8%) had mature oocytes on day 5, while 20, 27, and 44% of the female population had mature oocytes on days 6, 8, and 15, respectively. The presence of mature oocytes does not inhibit blood feeding: 17–26% of the females containing mature oocytes took blood, and embarked on a new round of oogenesis. The ovaries of these females contained two separate cohorts of primary follicles, viz., mature oocytes developed autogenously and oocytes developing as a result of the blood meal. Most of the autogenous females with mature oocytes (57–83%) refused blood. This indicates that the presence of mature follicles is a deterrent to feeding and probably to host-seeking. Mating had no effect on the proportion of females that was autogenous.

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

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 Relationship Among Breeding, Molting, and Wintering Areas of Male Barrow's Goldeneyes (Bucephala Islandica) in Eastern North America

The Auk ◽  
2002 ◽  
Vol 119 (3) ◽  
pp. 676-684 ◽  
Author(s):  
Michel Robert ◽  
Réjean Benoit ◽  
Jean-Pierre L. Savard
Keyword(s):  
North American ◽  
River Estuary ◽  
North American Population ◽  
American Population ◽  
Adult Males ◽  
Breeding Area ◽  
The North ◽  
Bucephala Islandica ◽  
The Mean ◽  
St Lawrence River

Abstract Little is known of the eastern North American population of Barrow's Goldeneyes (Bucephala islandica), which was recently listed as “of special concern” in Canada. In 1998 and 1999, we marked 18 adult males wintering along the St. Lawrence River, Québec, with satellite transmitters to document their breeding, molting, and wintering distribution and phenology, and to describe timing and routes of their spring, molt, and fall migrations. Thirteen males moved inland from the St. Lawrence River to breed; the spring migration averaged 5.9 days, and birds arrived on breeding areas on average 9 May. All breeding areas were inland, on the north shore of the St. Lawrence River estuary and gulf. Breeding areas averaged 64.8 km from the St. Lawrence corridor. Males stayed on their respective breeding area a mean of 34.5 days, and left on average 11 June. Twelve males were tracked to their molting areas, one of which stayed on its wintering area until 5 June and flew directly to its molting area. Their molt migration averaged 18.6 days, and the mean arrival date on molting areas was 30 June. All molting areas were located north and averaged 986 km from breeding areas. Four males molted in Hudson Bay, four in Ungava Bay, two in northern Labrador, one on Baffin Island, and one inland, near the Québec–Labrador border. The mean length of stay on the molting areas was 105.3 days, and the mean date of departure from molting areas was 4 October. All goldeneyes for which the radio still functioned during fall migration returned to winter in the St. Lawrence River estuary, on average 6 November. Our results refute the idea that the main breeding area of the eastern North American population of Barrow's Goldeneyes is located in northern Québec and Labrador and rather indicate that it is in the boreal forest just north of the St. Lawrence River estuary and gulf. They also indicate that Barrow's Goldeneye males undertake a genuine molt migration, and highlight the importance of molting areas because birds stayed there approximately four months each year.

scholarly journals Cystic fibrosis carrier screening in a North American population

2013 ◽  
Vol 16 (7) ◽  
pp. 539-546 ◽  
Author(s):  
Val V. Zvereff ◽  
Hawazin Faruki ◽  
Marcia Edwards ◽  
Kenneth J. Friedman
Keyword(s):  
Cystic Fibrosis ◽  
North American ◽  
Carrier Screening ◽  
North American Population ◽  
American Population ◽  
Cystic Fibrosis Carrier ◽  
Cystic Fibrosis Carrier Screening

scholarly journals Replication of the LINGO1 gene association with essential tremor in a North American population

2010 ◽  
Vol 18 (7) ◽  
pp. 838-843 ◽  
Author(s):  
Lorraine N Clark ◽  
Naeun Park ◽  
Sergey Kisselev ◽  
Eileen Rios ◽  
Joseph H Lee ◽  
...  
Keyword(s):  
Essential Tremor ◽  
North American ◽  
North American Population ◽  
American Population ◽  
Gene Association
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