scholarly journals Local positivity of linear series on surfaces

2018 ◽  
Vol 12 (1) ◽  
pp. 1-34 ◽  
Author(s):  
Alex Küronya ◽  
Victor Lozovanu
Keyword(s):  
Linear Series

Allozyme Frequencies in a Linear Series of Song Dialect Populations

Evolution ◽  
1982 ◽  
Vol 36 (5) ◽  
pp. 1020 ◽  
Author(s):  
Myron Charles Baker ◽  
Daniel B. Thompson ◽  
Gregory L. Sherman ◽  
Michael A. Cunningham ◽  
Diana F. Tomback
Keyword(s):  
Linear Series ◽  
Song Dialect

The Arrangement of Bristles in Drosophila1

Development ◽  
1961 ◽  
Vol 9 (4) ◽  
pp. 661-672
Author(s):  
J. Maynard Smith ◽  
K. C. Sondhi
Keyword(s):  
Linear Series ◽  
Two Dimensional ◽  
Constant Number ◽  
Geometrical Complexity ◽  
Hypodermal Cell ◽  
The Family ◽  
Illustrative Material

Much of the geometrical complexity of animals and plants arises by the repetition of similar structures, often in a pattern which is constant for a species. In an earlier paper (Maynard Smith, 1960) some of the mechanisms whereby a constant number of structures in a linear series might arise were discussed. In this paper an attempt is made to extend the argument to cases where such structures are arranged in two-dimensional patterns on a surface, using the arrangement of bristles in Drosophila as illustrative material. The bristles of Drosophila fall into two main classes, the microchaetes and the macrochaetes. A bristle of either type, together with its associated sensory nervecell, arises by the division of a single hypodermal cell. The macrochaetes are larger, and constant in number and position in a species, and in most cases throughout the family Drosophilidae.

Linear Series

1978 ◽  
pp. 161-198
Author(s):  
Robert J. Walker
Keyword(s):  
Linear Series

scholarly journals Biologic aspects of different species of Pachodynerus (Hymenoptera; Vespidae; Eumeninae)

2010 ◽  
Vol 70 (3) ◽  
pp. 623-629 ◽  
Author(s):  
MLT. Buschini ◽  
CE. Buss
Keyword(s):  
Mortality Rates ◽  
Linear Series ◽  
Nest Architecture ◽  
Southern Brazil ◽  
Biological Aspects ◽  
Nesting Activity

The aim of this study was to compare biological aspects of the Pachodynerus species occurring in the Parque Municipal das Araucárias, Guarapuava, Paraná, Southern Brazil. It was carried from December 2001 to December 2004. Forty one nests belonging to 5 species were collected, of which 17 Pachodynerus guadulpensis, 15 Pachodynerus sp., 1 Pachodynerus argentinus, 1 Pachodynerus ca guadulpensis and 7 Pachodynerus nasidens. The nesting activity of Pachodynerus sp., P. argentinus and P. guadulpensis occurred in similar periods, from December to March, with the exception of P.guadulpensis, that built one nest in October. Pachodynerus ca guadulpensis nested in March and P. nasidens from January to April. The nests of Pachodynerus species present a very similar architecture, comprising a linear series of cylindrical cells that fit perfectly into each other forming a continuous tube. With these results we were able to conclude that, even though Pachodynerus species present common characteristics, such as nest architecture, nesting activities and habitats in which they occur, the used resources, mortality rates, etc., vary among groups of species occurring in different regions.

XII.—The Avian Ulna: Its Quill - Knobs

1942 ◽  
Vol 61 (2) ◽  
pp. 138-148 ◽  
Author(s):  
George H. Edington ◽  
Agnes E. Miller
Keyword(s):  
Linear Series ◽  
Points Of Interest ◽  
Subsequent Publication ◽  
Outline Drawing

The presence upon the ulna of many birds of a row of smaller or greater tuberosities, their variety in size and conformation, and the presence of other appearances on the surface of the ulna suggested that an investigation of these variations and of the development of the structures might yield points of interest.Owen (1848) was apparently the first (we have been unable to consult Brandt's paper, quoted by Gadow) to draw attention to these ulnar markings, related to the quills of the secondary remiges. In that year he published a schematic outline drawing of the avian forelimb. Neither in this nor in a subsequent publication (1849), however, did he describe the linear series of markings on the ulna shown in the drawing; but in 1866 he stated that “on the ulnar and anconal sides of the shaft are the rows of quill-knobs (in Raptores) for the secondaries; the anconal row is most marked in longipennate Natatores, and is the only row in many birds.” He mentioned also that this character is wanting in the flightless and some other birds. Pl. I, fig. 1, will be seen to correspond closely with his description.

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