Comparative Analysis of Mourning Dove Population Change in North America

2010 ◽  
Vol 74 (5) ◽  
pp. 1059-1069 ◽  
Author(s):  
John R. Sauer ◽  
William A. Link ◽  
William L. Kendall ◽  
David D. Dolton
Keyword(s):  
Comparative Analysis ◽  
North America ◽  
Population Change ◽  
Mourning Dove

scholarly journals Comparative analysis of the anatomical structure of heartwood and sapwood selected Gymnocladus canadensis Lam. trees in Srpska Crnja

2011 ◽  
Vol 63 (3) ◽  
pp. 831-836
Author(s):  
Dragica Vilotic ◽  
Mirjana Sijacic-Nikolic ◽  
Danijela Miljkovic ◽  
Mirjana Ocokoljic ◽  
M. Rebic
Keyword(s):  
Comparative Analysis ◽  
North America ◽  
Anatomical Structure ◽  
Microscopic Structure ◽  
Capillary System

This paper shows the results obtained from the study of the macroscopic-microscopic structure (capillary system) in the growth stem of Gymnocladus canadensis Lam. originating from North America, which grows in ?Muzljanski rit? in the area of Srpska Crnja. Gymnocladus canadensis Lam. falls under the ring-porous species according to its porosity, with large tracheas in its early zone. The early zone trachea lumens, contained in the sapwood, reach dimensions of up to 160 ?m, while early zone trachea lumens in the growth stem rings of the sapwood reach dimensions of up to 120 ?m. Examination of the microscopic structure of this tree show good properties of the tree.

Scientific advice on species at risk: a comparative analysis of status assessments of polar bear, Ursus maritimus

2009 ◽  
Vol 17 (NA) ◽  
pp. 45-51 ◽  
Author(s):  
Jeffrey A. Hutchings ◽  
Marco Festa-Bianchet
Keyword(s):  
Comparative Analysis ◽  
Polar Bear ◽  
Population Change ◽  
The United States ◽  
Ursus Maritimus ◽  
Scientific Basis ◽  
Scientific Advice ◽  
Species Status ◽  
Public Policy Decisions ◽  
Abundance And Distribution

The assessment of species believed to be at heightened risk of extinction must be underpinned by scientific evaluations of past and predicted changes in abundance and distribution. When these assessments are communicated to society and (or) government, they provide an informed scientific basis for public policy decisions pertaining to the protection of biodiversity. The provision of advice for high-profile species can be particularly challenging as different interest groups may seek to over- or under-play a species' degree of endangerment. Those challenges are highlighted here by a comparative analysis of assessments of polar bear (Ursus maritimus) undertaken recently in Canada, the United States, and by the World Conservation Union (IUCN). Perceived differences in these assessments can be partly attributable to differences in the species status categories used by different organizations, the nature and application of assessment criteria, and the legislative responsibilities of those undertaking the assessments. Our analysis also highlights differences in how status assessments have informed the scientific basis for discordant projections of the future magnitude of polar bear habitat and population change. We conclude that evaluations of the scientific merits associated with any species status are hindered by imperfect understanding of differences in assessment protocols. Scientific advice potentially informed, but ultimately undermined, by personal and institutional biases serves neither decision-makers nor society well.

Comparative Colonialism and Collections-Based Archaeological Research

Museum Worlds ◽  
2016 ◽  
Vol 4 (1) ◽  
pp. 4-17 ◽  
Author(s):  
Julia A. King
Keyword(s):  
Comparative Analysis ◽  
North America ◽  
Early Modern ◽  
Chesapeake Bay ◽  
Indigenous People ◽  
Archaeological Research ◽  
Critical Dialogue ◽  
Good Shape ◽  
Archaeological Collections ◽  
Source Of Information

ABSTRACTLegacy collections are an increasingly valued source of information for researchers interested in the study and interpretation of colonialism in the Chesapeake Bay region of North America. Through the reexamination of 34 archaeological collections ranging in date from 1500 through 1720, researchers, including the author, have been able to document interactions among Europeans, Africans, and indigenous people in this part of the early modern Atlantic. We could do this only because we turned to existing collections; no single site could reveal this complex story. This article summarizes the major findings from this work and describes the pleasures and challenges of comparative analysis using existing collections. Collections-based research can also be used to inform fieldwork, so the legacy collections of tomorrow are in as good shape as possible. Indeed, collections-based work reveals the need for a critical dialogue concerning the methods, methodology, and ethics of both collections and field-based research.

Ideas, Institutions and the Policies of Governments: a Comparative Analysis: Parts I and II

1973 ◽  
Vol 3 (3) ◽  
pp. 291-313 ◽  
Author(s):  
Anthony King
Keyword(s):  
Decision Making ◽  
Comparative Analysis ◽  
North America ◽  
Western Europe ◽  
Welfare States ◽  
Decision Making Processes

This paper is about the things governments do and why they do them. It is written in the belief that, while we know quite a lot about decision-making processes in individual countries, we do not know nearly enough about why the governments of different countries make different decisions and pursue different policies. The countries of North America and western Europe are often described as ‘welfare states’, the implication being that the governments of all of them do broadly similar things in broadly similar ways. As we shall see, however, these broad similarities conceal important, wide divergences. These divergences deserve to be explained.

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