The salivary gland chromosomes of Prosimulium multidentatum Twinn and three forms included in Prosimulium magnum (Dyar and Shannon) (Diptera:Simuliidae)

1969 ◽  
Vol 47 (5) ◽  
pp. 943-949 ◽  
Author(s):  
P. O. Ottonen ◽  
Ramachandran Nambiar
Keyword(s):  
New York ◽  
Salivary Gland ◽  
Great Lakes ◽  
Sex Chromosomes ◽  
Species Complex ◽  
New York State ◽  
Great Lakes Region ◽  
Southern Ontario ◽  
York State ◽  
The Third

Further study of the morphology of salivary gland chromosome complements within the range described for Prosimulium magnum showed the species to consist of three cytologically distinct populations. The first two forms are without sex chromosomes, (1) a form analogous to the species chromosomal standard, P. magnum, (2) a form which is differentiated by the fixed inversion IIS-25, but (3) the third form has cytological XcYc sex determination. In the Great Lakes region these three forms of the P. magnum complex and P. multidentatum are sympatric in three separate areas, Michigan, Southern Ontario, and Western New York State. Natural hybrids between the forms have so far been obtained only infrequently, and the known hybrids are described. Some chromosomal aspects of speciation are discussed in relation to the present observations on the species complex.

scholarly journals Great Plains Ladies’-tresses (Spiranthes magnicamporum) in the lower Great Lakes region and a new record for New York State

2015 ◽  
Vol 129 (2) ◽  
pp. 183
Author(s):  
Daniel F. Brunton
Keyword(s):  
New York ◽  
Great Lakes ◽  
Great Plains ◽  
New Records ◽  
New York State ◽  
The United States ◽  
Great Lakes Region ◽  
Long Distance ◽  
York State ◽  
Glacial Relict

Six populations of Great Plains Ladies’-tresses (Spiranthes magnicamporum Sheviak) have recently been discovered in three locations east of the lower Great Lakes region of Canada and the United States. The possible occurrence of S. cernua × magnicamporum hybrids was detected at one New York site. These discoveries are from both natural alvar and disturbed meadow and shore sites. The new records suggest that S. magnicamporum occurs more widely than was suspected previously, its presence perhaps masked by its similarity to the common S. cernua (L.) Richard. Eastern occurrences may represent a combination of post-glacial relict populations, responses to climate change, and the results of long-distance dispersal events. These range extensions constitute the most easterly known populations of S. magnicamporum in North America. They also represent new records for New York State (including Jefferson and St. Lawrence Counties) and for the City of Ottawa in Ontario.

THE SALIVARY GLAND CHROMOSOMES OF TWO SIBLING SPECIES OF BLACK FLIES INCLUDED IN EUSIMULIUM AUREUM FRIES

1958 ◽  
Vol 36 (1) ◽  
pp. 23-44 ◽  
Author(s):  
Robert W. Dunbar
Keyword(s):  
New York ◽  
Salivary Gland ◽  
Sibling Species ◽  
New York State ◽  
Chromosomal Polymorphism ◽  
Distinct Species ◽  
Black Flies ◽  
Southern Ontario ◽  
York State ◽  
Wide Range

Two closely related dichromosomic sibling species of Eusimulium "aureum" were segregated cytologically in populations sampled from the Toronto area. The known range of these two so far included southern Ontario and Quebec, and New York State. Both siblings have extremely similar salivary gland chromosomes but they differ by four homozygously rearranged regions, all in the first chromosome, and in the degree of chromosomal polymorphism. Although sympatric over a wide range, the two siblings do not interbreed as evidenced by the failure to find critical heterozygous loops for the interspecific inversions, and the absence of common intraspecific inversions. Therefore the siblings represent two biologically distinct species.

The Judicial Council of the State of New York; Its Objectives, Methods, and Accomnlishments. I

1941 ◽  
Vol 35 (5) ◽  
pp. 933-940
Author(s):  
Leonard S. Saxe
Keyword(s):  
New York ◽  
New York State ◽  
The State ◽  
York State ◽  
The Third ◽  
The Law ◽  
Substantive Law

The Judicial Council and Its Objectives. My assignment is to implement Professor Sunderland's brilliant primer on judicial councils by a more specific presentation utilizing the experiences of the New York State Judicial Council. Of the three elements that enter into a consideration of the judicial branch of government, the first—the substantive law, the law of rights and duties—is not within the province of the judicial council either in New York or elsewhere. The second element—the machinery of justice—is the principal field of the judicial council. If the council does its work well in that field, attention cannot fail to be focused upon the third and most important element—also part of a judicial council's problems—the judicial personnel.

The Visually Impaired Driver in New York State

1979 ◽  
Vol 73 (6) ◽  
pp. 228-232
Author(s):  
Norman J. Weiss
Keyword(s):  
New York ◽  
Visually Impaired ◽  
Low Vision ◽  
New York State ◽  
Lens System ◽  
York State ◽  
The Third ◽  
Road Signs ◽  
Third Phase ◽  
Usual Manner

Describes a three-part driving program for low vision persons. Potential trainees are first interviewed to detect problems that may interfere with success. Suitable candidates are then trained to quickly detect and recognize objects through a bioptic lens system. In the third phase, a mobility instructor gives training in various aspects of the automobile and driving, and the trainee is quizzed on road signs and markings while riding as a passenger. Students successfully completing all three phases may then go on to obtain a Learner's Permit and take driving lessons in the usual manner.

Supernormal fluid pressures in sedimentary rocks of southern Ontario – western New York State

1992 ◽  
Vol 29 (1) ◽  
pp. 80-93 ◽  
Author(s):  
K. G. Raven ◽  
K. S. Novakowski ◽  
R. M. Yager ◽  
R. J. Heystee
Keyword(s):  
New York ◽  
Sedimentary Rock ◽  
New York State ◽  
Sedimentary Rocks ◽  
Fluid Pressure ◽  
Gas Migration ◽  
Southern Ontario ◽  
York State ◽  
Monitoring Wells ◽  
Pressure Transducers

Fluid pressures up to 1.7 times greater than hydrostatic have been measured in argillaceous Paleozoic rocks of low permeability in southern Ontario and western New York State. These supernormal formation fluid pressures were measured at depths of 50–310 m using submersible pressure transducers with straddle packers and multiple-packer casings isolating the test intervals. Measurements were obtained over periods of 7–46 months following casing installations. The pressure measurements from 11 monitoring wells are compiled and supporting hydrogeologic data for 5 selected wells are used as examples to illustrate the occurrence of supernormal fluid pressures in the Ordovician, Silurian, and Devonian sedimentary sequence of southern Ontario and western New York State. Possible explanations for the occurrence of supernormal fluid pressures in sedimentary rock are evaluated considering the available geologic and hydrogeologic information obtained from the monitoring wells. Based on this review, it is hypothesized that gas migration and accumulation from deeper distant sources via permeable vertical pathways is the most plausible explanation for the observed fluid pressures, although secondary contributions from local neotectonic activity are also possible. The implications of such supernormal fluid pressures on regional groundwater flow in sedimentary rocks and related activities such as waste disposal in sedimentary rock are briefly discussed. Key words : supernormal fluid pressure, sedimentary rocks, gas migration.

scholarly journals A Case Study of Anomalous Snowfall with an Alberta Clipper

2017 ◽  
Vol 2017 ◽  
pp. 1-14
Author(s):  
Scott M. Rochette ◽  
Patrick S. Market ◽  
Chad M. Gravelle ◽  
Thomas A. Niziol
Keyword(s):  
New York ◽  
Great Lakes ◽  
New York State ◽  
Vertical Motion ◽  
Limited Time ◽  
Heavy Snowfall ◽  
York State ◽  
Fast Motion

An Alberta clipper moved over western New York state on 11-12 January 2004, producing snowfall amounts of up to 27 cm in portions of the region during a roughly 12-h period. In addition, lightning and thunder were reported. Such systems, known primarily for their fast motion and relatively dry nature, are not generally associated with significant snowfalls. A postmortem analysis of this event, following an ingredients-based methodology, revealed that as the weak low approached the lower Great Lakes, it came under the influence of coupled 300-hPa jets that produced enhanced divergence and significant upward vertical motion over western New York, resulting in the enhanced convective snowfall over the region for a limited time. Instability and possible enhancement via the Great Lakes are also investigated, which show that while there was at least modest instability over the region during the time of heavy snowfall, lake enhancement was unlikely.

Sign in / Sign up

Export Citation Format

Share Document