A morphological comparison of muskrats (Ondatra zibethicus) from Newfoundland and New Brunswick

1982 ◽  
Vol 60 (9) ◽  
pp. 2235-2238 ◽  
Author(s):  
Michael D. Rigby ◽  
William Threlfall
Keyword(s):  
New Brunswick ◽  
Multivariate Techniques ◽  
Ondatra Zibethicus ◽  
Morphological Comparison ◽  
Skull Measurements ◽  
Valid Taxon

Adult muskrats (Ondatra zibethicus) from Newfoundland (N = 44) and New Brunswick (N = 21) were measured and data obtained were analyzed using multivariate techniques. On the basis of skull measurements it was possible to accurately predict (P < 0.01) the site of origin of individual animals. Size differences were related to the availability of preferred foodstuffs. Ondatra zibethicus obscurus is considered a valid taxon for the Newfoundland muskrat.

Morphological Comparison of Two Northwest Atlantic Redfishes, Sebastes fasciatus and S. mentella, and Techniques for Their Identification

1986 ◽  
Vol 43 (4) ◽  
pp. 781-787 ◽  
Author(s):  
T. J. Kenchington
Keyword(s):  
Rapid Method ◽  
Morphological Data ◽  
Multivariate Techniques ◽  
Scotian Shelf ◽  
Morphological Comparison ◽  
Large Samples ◽  
Fin Ray ◽  
Field Identification ◽  
Rational Management ◽  
Electrophoretic Techniques

A knowledge of the taxonomy of the Atlantic redfishes, Sebastes spp., and techniques for their field identification are essential prerequisites for rational management of their fishery, but both remain poorly known. Through analysis of a set of morphological data for Sebastes fasciatus and S. mentella of the Scotian Shelf, using multivariate techniques, I examined the potential of 15 characters as field identifiers. Although the species are significantly different, they cannot be fully separated using these characters. I suggest that electrophoretic techniques are needed for precise identifications, although a rapid method for determining the species compositions of large samples, using anal fin ray counts, could be developed.

Meristic Differences in Spawning Populations of American Shad, Alosa sapidissima: Evidence for Homing to Tributaries in the St. John River, New Brunswick

1975 ◽  
Vol 32 (5) ◽  
pp. 653-660 ◽  
Author(s):  
James E. Carscadden ◽  
William C. Leggett
Keyword(s):  
New Brunswick ◽  
Multivariate Analyses ◽  
River System ◽  
Genetic Component ◽  
American Shad ◽  
Multivariate Techniques ◽  
Meristic Characters ◽  
Alosa Sapidissima ◽  
Meristic Counts

Univariate and multivariate analyses were performed on five meristic characters of American shad, Alosa sapidissima, spawning in the Miramichi, St. John, Connecticut, and Hudson rivers. In 71% of the comparisons, significant differences in mean numbers of meristic characters existed between river populations and between tributaries within the St. John River system. Comparisons of populations using multivariate techniques revealed that percentage of overlap of meristic characters was low (< 1% in most comparisons). It is suggested that shad not only home to their natal river but also to their natal tributary. The results suggest that in shad, meristic counts are strongly influenced by a genetic component.

Ultrastructure and Morphology of the Neurospora Crassa Cell Wall Mutants, Slime And Slime X, Using Tem and Sem

1976 ◽  
Vol 34 ◽  
pp. 54-55
Author(s):  
Karen S. Howard ◽  
H. D. Braymer ◽  
M. D. Socolofsky ◽  
S. A. Milligan
Keyword(s):  
Cell Wall ◽  
Neurospora Crassa ◽  
Wild Type ◽  
Morphological Comparison ◽  
Small Areas ◽  
Solid Media ◽  
Thin Sectioning ◽  
X Cells ◽  
Mutant Cells ◽  
Isolated Cell

The recently isolated cell wall mutant slime X of Neurospora crassa was prepared for ultrastructural and morphological comparison with the cell wall mutant slime. The purpose of this article is to discuss the methods of preparation for TEM and SEM observations, as well as to make a preliminary comparison of the two mutants.TEM: Cells of the slime mutant were prepared for thin sectioning by the method of Bigger, et al. Slime X cells were prepared in the same manner with the following two exceptions: the cells were embedded in 3% agar prior to fixation and the buffered solutions contained 5% sucrose throughout the procedure.SEM: Two methods were used to prepare mutant and wild type Neurospora for the SEM. First, single colonies of mutant cells and small areas of wild type hyphae were cut from solid media and fixed with OSO4 vapors similar to the procedure used by Harris, et al. with one alteration. The cell-containing agar blocks were dehydrated by immersion in 2,2-dimethoxypropane (DMP).

Book Reviews

2014 ◽  
Vol 2 (1) ◽  
pp. 80-95
Author(s):  
Ulrike Flader ◽  
Vera Ecarius-Kelly ◽  
Clemence SCALBERT-YÜCEL ◽  
Michael M. Gunter ◽  
Tozun Bahcheli ◽  
...  
Keyword(s):  
New Brunswick ◽  
Economic Impacts ◽  
Publishing House ◽  
Rutgers University ◽  
Ashgate Publishing ◽  
Kurdish Question ◽  
Newcastle Upon Tyne

Cengiz Gunes and Welat Zeydanlıoğlu (eds.), The Kurdish Question in Turkey: New Perspectives on Violence, Representation and Reconciliation, London: Routledge, 2014, 288 pp., (ISBN: 978-0-415-83015-7).Almas Heshmati and Nabaz T. Khayyat, Socio-Economic Impacts of Landmines in Southern Kurdistan, Newcastle upon Tyne: Cambridge Scholars Publishing, 2013, 341 pp., (ISBN: 978-1-4438-4198-6).Estelle Amy de la Bretèque, Paroles Mélodisées: Récits épiques et lamentations chez les Yézidis d’Arménie (Melodised speech. Heroic songs and laments among the Yezidis of Armenia), Paris: Classiques Garnier, 2013, 230pp., (ISBN: 978-2-8124-0787-1).Diane E. King, Kurdistan on the Global Stage: Kinship, Land, and Community in Iraq, New Brunswick and London: Rutgers University Press, 2014. 286 pp., (ISBN: 9780813563534).Michael M. Gunter and Mohammed M.A. Ahmed (eds.), The Kurdish Spring: Geopolitical Changes and the Kurds, Costa Mesa: Mazda Publishers, 2013, 344 pp., (ISBN: 978-1568592725).Derya Bayır, Minorities and Nationalism in Turkish Law, Surrey: Ashgate Publishing House, 2013, 314 pp., (ISBN: 9781409420071).

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