scholarly journals Cytogenetic studies in North American minnows(Cyprinidae). VII. Karyotypes of 13 species from the southern united states.

CYTOLOGIA ◽  
1981 ◽  
Vol 46 (1/2) ◽  
pp. 105-115 ◽  
Author(s):  
J. R. Gold ◽  
W. D. Womac ◽  
F. H. Deal ◽  
J. A. Barlow, Jr.
Keyword(s):  
United States ◽  
North American ◽  
Southern United States ◽  
Cytogenetic Studies

CONTACT TOXICITY OF 17 INSECTICIDES TO LARVAE OF DIORYCTRIA AMATELLA (LEPIDOPTERA: PYRALIDAE)

1980 ◽  
Vol 112 (5) ◽  
pp. 521-523 ◽  
Author(s):  
Gary L. DeBarr ◽  
Vicki H. Fedde
Keyword(s):  
United States ◽  
North American ◽  
Laboratory Tests ◽  
Insect Pests ◽  
Southern United States ◽  
Contact Toxicity ◽  
Southern Pine ◽  
Lepidoptera Pyralidae

Moths of the genus Dioryctria are important insect pests of North American conifers (Baker 1972). Of the species that occur in the southern United States, e.g., D. clarioralis (Walker), D. disclusa (Heinrich), and D. ebeli Mutuura and Munroe, the southern pine coneworm, Dioryctria amatella (Hulst), is the most destructive (Ebel et al. 1975). Our paper reports the results of laboratory tests aimed at determining the relative toxicities of commercially available or promising experimental insecticides to D. amatella larvae.

scholarly journals Impacts of the Atlantic Multidecadal Variability on North American Summer Climate and Heat Waves

2018 ◽  
Vol 31 (9) ◽  
pp. 3679-3700 ◽  
Author(s):  
Yohan Ruprich-Robert ◽  
Thomas Delworth ◽  
Rym Msadek ◽  
Frederic Castruccio ◽  
Stephen Yeager ◽  
...  
Keyword(s):  
United States ◽  
North Atlantic ◽  
North American ◽  
Heat Waves ◽  
Southern United States ◽  
Atlantic Multidecadal Variability ◽  
Multidecadal Variability ◽  
Northern Mexico ◽  
The North ◽  
North American Climate

The impacts of the Atlantic multidecadal variability (AMV) on summertime North American climate are investigated using three coupled global climate models (CGCMs) in which North Atlantic sea surface temperatures (SSTs) are restored to observed AMV anomalies. Large ensemble simulations are performed to estimate how AMV can modulate the occurrence of extreme weather such as heat waves. It is shown that, in response to an AMV warming, all models simulate a precipitation deficit and a warming over northern Mexico and the southern United States that lead to an increased number of heat wave days by about 30% compared to an AMV cooling. The physical mechanisms associated with these impacts are discussed. The positive tropical Atlantic SST anomalies associated with the warm AMV drive a Matsuno–Gill-like atmospheric response that favors subsidence over northern Mexico and the southern United States. This leads to a warming of the whole tropospheric column, and to a decrease in relative humidity, cloud cover, and precipitation. Soil moisture response to AMV also plays a role in the modulation of heat wave occurrence. An AMV warming favors dry soil conditions over northern Mexico and the southern United States by driving a year-round precipitation deficit through atmospheric teleconnections coming both directly from the North Atlantic SST forcing and indirectly from the Pacific. The indirect AMV teleconnections highlight the importance of using CGCMs to fully assess the AMV impacts on North America. Given the potential predictability of the AMV, the teleconnections discussed here suggest a source of predictability for the North American climate variability and in particular for the occurrence of heat waves at multiyear time scales.

NOTES ON SOME TROPICAL NOCTUIDS IN NORTH AMERICA

1937 ◽  
Vol 69 (10) ◽  
pp. 218-219
Author(s):  
A. Glenn Richards
Keyword(s):  
United States ◽  
North America ◽  
North American ◽  
Southern United States ◽  
Tropical Species ◽  
The North

The following notes are written to place on record certain authentic records of tropical species taken in the southern United States. Most of these species are not at present recorded in the North American lists. Unless otherwise stated all specimens are in the author's collection.

Invasion of the exotic cladoceran Daphnia lumholtzi into North American reservoirs

1995 ◽  
Vol 52 (1) ◽  
pp. 151-160 ◽  
Author(s):  
John E. Havel ◽  
William R. Mabee ◽  
John R. Jones
Keyword(s):  
United States ◽  
Population Dynamics ◽  
North America ◽  
North American ◽  
Late Summer ◽  
Southern United States ◽  
Daphnia Lumholtzi ◽  
Distributional Patterns ◽  
History Of

Daphnia lumholtzi, a large cladoceran native to Africa, Asia, and Australia, has recently invaded reservoirs of the southern United States. We examined its distribution, history of invasion, and population dynamics in Missouri reservoirs. Surveys detected the species in 7 of 112 reservoirs in 1992 and 11 of 119 reservoirs in 1993. Analysis of quantitative zooplankton samples from two reservoirs over a 7-year period indicated that D. lumholtzi first reached detectable densities in 1990 and persisted during 1991–1993. Population maxima typically occurred in late summer, with the species absent from the plankton during winter and spring. Based on its current distributional patterns, D. lumholtzi appears to be capable of colonizing most reservoirs in the southern regions of North America.

Benjamin Henry Latrobe and the nomenclature of two North American fishes

1987 ◽  
Vol 14 (1) ◽  
pp. 85-88
Author(s):  
CHARLOTTE M PORTER
Keyword(s):  
United States ◽  
North American ◽  
The United States ◽  
American Shad ◽  
New Name ◽  
The Common ◽  
Fish Louse

A curious error affects the names of three North American clupeids—the Alewife, American Shad, and Menhaden. The Alewife was first described by the British-born American architect, Benjamin Henry Latrobe in 1799, just two years after what is generally acknowledged as the earliest description of any ichthyological species published in the United States. Latrobe also described the ‘fish louse’, the common isopod parasite of the Alewife, with the new name, Oniscus praegustator. Expressing an enthusiasm for American independence typical of his generation, Latrobe humorously proposed the name Clupea tyrannus for the Alewife because the fish, like all tyrants, had parasites or hangers-on.

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