نتایج جستجو برای: Founder effect

تعداد نتایج: 1647862  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان - دانشکده دامپزشکی 1393

تشخیص لنگش های بند سوم که از مهترین علت های لنگش در اسب می باشد نیاز به فهم یافته های نرمال رادیوگرافی بند سوم دارد. از آنجایی که تاکنون اطلاعات دقیقی در مورد اندازه ها و زوایای بند سوم در اسب عرب خون داخلی به دست نیامده و مقایسه ای با نژادهای دیگر اسب ها صورت نگرفته است. در این تحقیق سعی شده است که خصوصیات بیومتریک بند سوم دست اسب عرب اصیل توسط رادیولوژی مورد بررسی قرار گیرد. در این تحقیق 10 ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1976
D B Mertz D A Cawthon T Park

This report reexamines experimentally the problem of competitive indeterminacy in mixed-species populations of the flour beetles, Tribolium confusum and T. castaneum. Indeterminacy takes the form of alternative competitive outcomes: in some replicate cultures one species exterminates the other with a probability, say p, whereas in others, the opposing species wins with a complementary probabili...

2009
Gerry Segal Dan Borgia

The authors investigated the effect of founders’ human capital on the performance of their small firms. In our model, founder human capital had two dimensions: (1) level of education and (2) industry managerial experience. The authors hypothesized that higher levels of founder education and more years of founder industry managerial experience led to better firm performance. A survey of founder-...

Journal: :American Journal of Physical Anthropology 1969

2015
Inger Greve Alsos Dorothee Ehrich Pernille Bronken Eidesen Heidi Solstad Kristine Bakke Westergaard Peter Schönswetter Andreas Tribsch Siri Birkeland Reidar Elven Christian Brochmann

Long-distance dispersal (LDD) processes influence the founder effect on islands. We use genetic data for 25 Atlantic species and similarities among regional floras to analyse colonization, and test whether the genetic founder effect on five islands is associated with dispersal distance, island size and species traits. Most species colonized postglacially via multiple dispersal events from sever...

2008
Lijun Xia Zengquan Li Feng Liu Qifeng Zhang Tianyu Zhang LIJUN XIA

In emerging markets, the deviation between the ultimate controlling shareholders’ voting rights and their cash flow rights (hereafter “DVC”) in the listed firms is quite prevalent. DVC could be introduced due to the ultimate controlling shareholders’ opportunistic incentives, as well as by their incentives to improve firm efficiency. This study uses 229 listed firms ultimately controlled by ind...

2016
Ninja Karikoski Satu Sankari Catherine McGowan

................................................................................................ 5 ACKNOWLEDGEMENTS .......................................................................... 7 CONTENTS ................................................................................................ 9 LIST OF ORIGINAL PUBLICATIONS ..................................................... 12 ABBREVIAT...

Journal: :Evolution; international journal of organic evolution 2015
Benjamin M Peter Montgomery Slatkin

The gradual loss of diversity and the establishment of clines in allele frequencies associated with range expansions are patterns observed in many species, including humans. These patterns can result from a series of founder events occurring as populations colonize previously unoccupied areas. We develop a model of an expanding population and, using a branching process approximation, show that ...

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