Early Fall Migration of the Purple Martin

The Auk ◽  
1947 ◽  
Vol 64 (1) ◽  
pp. 140-141 ◽  
Author(s):  
Alexander Sprunt,
Keyword(s):  
Early Fall ◽  
Purple Martin

Purple Martin (Progne subis)

2013 ◽  
Author(s):  
Charles R. Brown ◽  
Scott Tarof
Keyword(s):  
Progne Subis ◽  
Purple Martin

scholarly journals Decrease in Enteroviral Meningitis - An Unexpected Benefit of COVID-19 Mitigation?

2020 ◽  
Author(s):  
Kami D Kies ◽  
Amber S Thomas ◽  
Matthew J Binnicker ◽  
Kelli L Bashynski ◽  
Robin Patel
Keyword(s):  
Cerebrospinal Fluid ◽  
Laboratory Testing ◽  
Clinical Microbiology ◽  
Late Summer ◽  
Mitigation Strategies ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Testing Data ◽  
Early Fall ◽  
Enteroviral Meningitis

Abstract Enteroviral meningitis is seasonal, typically exhibiting a rise in prevalence in late summer/early fall. Based on clinical microbiology laboratory testing data of cerebrospinal fluid, the expected August/September/October peak in enteroviral meningitis did not occur in 2020, possibly related to COVID-19 mitigation strategies.

SEEDLING PUBESCENCE AS A GENETIC MARKER IN SMOOTH BROMEGRASS (BROMUS INERMIS LEYSS.)

1980 ◽  
Vol 60 (4) ◽  
pp. 1163-1170 ◽  
Author(s):  
R. P. KNOWLES
Keyword(s):  
Genetic Marker ◽  
North American ◽  
Inbred Lines ◽  
Bromus Inermis ◽  
Mass Selection ◽  
Smooth Bromegrass ◽  
Leaf Stage ◽  
Temperature Conditions ◽  
Early Fall ◽  
Controlled Crosses

Seedlings of a group of North American cultivars of smooth bromegrass were examined at the three-leaf stage for pubescence under greenhouse conditions. Southern strains showed 90–98% strongly pubescent seedlings while northern strains had 60–70% strongly pubescent seedlings. Saratoga, although considered southern in type, was less pubescent than all other cultivars except Polar. The degree of pubescence was greater in spring and early fall plantings than in winter plantings, indicating that pubescence depends on good light and temperature conditions. Strains nearly pure for strong pubescence were formed by repeated cycles of mass selection. Few inbred lines showed uniformity for pubescent or smooth seedlings. Pure-breeding smooth stocks were more difficult to produce than highly pubescent strains. Controlled crosses showed partial dominace for pubescence and little difference between reciprocals. Adjacent plantings of pubescent and smooth seedling stocks showed as much as 45% off-type seedlings from seed produced at the interface of plots. Contamination declined to 10% or less at 10 m from the border.

Density, growth, and change in density of coho salmon and rainbow trout in three Lake Michigan tributaries

1983 ◽  
Vol 61 (5) ◽  
pp. 1120-1127 ◽  
Author(s):  
L. M. Carl
Keyword(s):  
Rainbow Trout ◽  
Growth Rates ◽  
Lake Michigan ◽  
Coho Salmon ◽  
Daily Growth ◽  
Salmon Fry ◽  
Daily Change ◽  
Early Fall ◽  
Growth And Change ◽  
Downstream Movement

Coho salmon spawning peaked in the late fall. Spawning densities ranged from fewer than 5 coho salmon per hectare up to 90 fish per hectare. Subyearling coho salmon densities ranged from 10 to 60 fish per 100 m2 in June and dropped to 5–20 fish by early fall. Coho salmon fry increased in length from 40 mm in early May, to over 120 mm by smolt out-migration in the following April. Coho salmon instantaneous daily change in density coefficients ranged from 0.004 to 0.019 and were dependent on initial coho density. Daily coho salmon growth rates ranged from 0.38 to 0.60 mm per day and were not dependent on initial coho salmon density. Downstream movement of rainbow trout fry began in May, and continued into July. In the spring 10–20 yearlings and one to five 2-year-olds per 100 m2 were present. Most fry emerged in June at a size of 25 mm and grew to 85 mm by fall. Daily growth rates varied from 0.23 to 0.45 mm per day for yearling rainbow trout and were not correlated with rainbow trout density.

DEVELOPMENT AND YIELD OF CANADIAN WESTERN RED SPRING AND CANADA PRAIRIE SPRING WHEATS AS AFFECTED BY DELAYED SEEDING IN THE BROWN AND DARK BROWN SOIL ZONES OF SASKATCHEWAN

1990 ◽  
Vol 70 (3) ◽  
pp. 639-660 ◽  
Author(s):  
H. W. CUTFORTH ◽  
C. A. CAMPBELL ◽  
D. JUDIESCH ◽  
R. M. DePAUW ◽  
J. M. CLARKE ◽  
...  
Keyword(s):  
Protein Concentration ◽  
Grain Quality ◽  
Frost Damage ◽  
Wheat Cultivars ◽  
Brown Soil ◽  
Soil Zone ◽  
Seeding Date ◽  
Optimum Period ◽  
Early Fall ◽  
The Difference

Historically, research has identified the optimum period of seeding Canadian Western Red Spring (CWRS) wheat in the Brown soil zone to be between late April and mid-May, and approximately mid-May in the Dark Brown soil zone. The recent development and release of new spring wheat cultivars with significantly different genetic makeup (Canada Prairie Spring (CPS) wheats) prompted this study to determine if the established criteria were valid for them. Seeding date experiments involving one CWRS wheat (Neepawa) and three CPS wheats (HY320, HY355, HY912) were carried out at Swift Current (1984–1988) and at Regina and Scott (1985–1988). Although significant seeding date × cultivar interactions occurred for several of the characteristics measured (e.g., yield, protein concentration), no cultivar consistently responded differently than the others. However, the difference in days to reach maturity between the later maturing CPS cultivars and the CWRS cultivar, Neepawa, generally increased with delayed seeding making the CPS cultivars more susceptible to early fall frost damage which could decrease their yields and grain quality. Our results showed no reason to change recommendations for seeding dates in either soil zone, and both types of wheat can be treated similarly except that late seeding for CPS wheats should be avoided.Key words: Seeding date, grain yield, GDD, protein, wheat

Performance of Indigenous, Exotic, and Hybrid Strains of Brook Trout (Salvelinus fontinalis) in Waters of the Adirondack Mountains, New York

1981 ◽  
Vol 38 (12) ◽  
pp. 1701-1707 ◽  
Author(s):  
Dwight A. Webster ◽  
William A. Flick
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Hybrid Vigor ◽  
Superior Performance ◽  
Adirondack Mountains ◽  
Wild Strains ◽  
Early Fall ◽  
Survival And Growth ◽  
Wild Trout

Eleven year-classes of wild, domestic, and wild × domestic hybrid strains of brook trout (Salvelinus fontinalis) were stocked in a 0.19-ha Adirondack pond. Comparative survival and growth were assessed upon drainage in early fall. Rearing native wild strains to maturity in a hatchery, or domestic strains in a natural environment, did not consistently or materially affect survival of progeny, suggesting that superior performance of wild strains was largely inherent. Interstrain hybrids of wild × domestic showed survivals equivalent to the wild parents, but hybrids of two Canadian strains gave evidence of heterosis in both survival and net yield. Supplementary observations in other waters also indicated that one strain (Assinica) may be less adaptable to Adirondack conditions than the other (Temiscamie).Key words: brook trout, wild trout, domesticated trout, interstrain hybrid trout, survival, growth, heterosis, hybrid vigor

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