Optimal Migration

Author : Nikita Chernetsov
Publisher : Springer Science & Business Media
Page : 188 pages
File Size : 43,7 Mb
Release : 2012-04-18
Category : Science
ISBN : 9783642290206

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Passerine Migration by Nikita Chernetsov Pdf

Most birds cannot cover the distance between their breeding and winter quarters in one hop. They have to make multiple flights alternated with stopovers. Which factors govern the birds’ decisions to stop, to stop for how long, when to resume flight? What is better – to accumulate much fuel and to make long flights for many hundreds of kilometres, or to travel in small steps? Is it necessary to find habitats similar to the breeding ones or other habitats would do? Are long migratory flights indeed so costly energetically as usually assumed? This monograph summarizes our current knowledge on the ecology of songbird migrants during migratory stopovers and on their behaviour.​

Author : Eberhard Gwinner
Publisher : Springer Science & Business Media
Page : 436 pages
File Size : 44,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642745423

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Bird Migration by Eberhard Gwinner Pdf

E. GWINNER! The phenomenon of bird migration with its large scale dimensions has attracted the attention of naturalists for centuries. Worldwide billions of birds leave their breeding grounds every autumn to migrate to areas with seasonally more favor able conditions. Many of these migrants travel only over a few hundred kilo meters but others cover distances equivalent to the circumference of the earth. Among these long-distance migrants are several billion birds that invade Africa every autumn from their West and Central Palaearctic breeding areas. In the Americas and in Asia the scope of bird migration is of a similar magnitude. Just as impressive as the numbers of birds are their achievements. They have to cope with the enormous energetic costs of long-distance flying. particularly while crossing oceans and deserts that do not allow replenishment of depleted fat reserves. They have to appropriately time the onset and end of migrations. both on a daily and annual basis. And finally. they have to orient their migratory movements in space to reach their species- or population-specific wintering and breeding grounds, irrespective of the variable climatic conditions along their migratory routes.

Author : Christian Dustmann
Publisher : Unknown
Page : 36 pages
File Size : 52,8 Mb
Release : 2001
Category : Electronic
ISBN : CORNELL:31924091532055

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Return Migration, Wage Differentials, and the Optimal Migration Duration by Christian Dustmann Pdf

Author : Nathan R. Senner,Yolanda E. Morbey,Brett K. Sandercock
Publisher : Frontiers Media SA
Page : 426 pages
File Size : 52,9 Mb
Release : 2020-06-29
Category : Electronic
ISBN : 9782889638116

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Flexibility in the Migration Strategies of Animals by Nathan R. Senner,Yolanda E. Morbey,Brett K. Sandercock Pdf

Author : Christian Dustmann,Oliver Kirchkamp
Publisher : Unknown
Page : 44 pages
File Size : 48,5 Mb
Release : 2001
Category : Electronic
ISBN : CORNELL:31924088100825

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The Optimal Migration Duration and Activity Choice After Re-migration by Christian Dustmann,Oliver Kirchkamp Pdf

Author : Ivan Maggini,Lucy Alice Hawkes,Arne Hegemann,Matthew Jason Noakes
Publisher : Frontiers Media SA
Page : 196 pages
File Size : 44,7 Mb
Release : 2022-10-18
Category : Science
ISBN : 9782832502761

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Ecophysiological Adaptations Associated With Animal Migration by Ivan Maggini,Lucy Alice Hawkes,Arne Hegemann,Matthew Jason Noakes Pdf

Author : Slobodan Djajić,Alexandra Brausmann
Publisher : Cambridge Scholars Publishing
Page : 497 pages
File Size : 50,6 Mb
Release : 2024-03-25
Category : Social Science
ISBN : 9781036402235

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Economics of Undocumented Migration by Slobodan Djajić,Alexandra Brausmann Pdf

Undocumented international migration is an increasingly important political, social and economic issue. The articles collected in this volume provide a framework for the study of some key decisions that potential migrants are confronted with when considering a move abroad. This includes the timing of departure, the method of financing the move, the choice between documented and undocumented modes of entry, the optimal duration of the stay abroad, how much to save, etc. The various chapters illustrate how decisions of migrants are shaped not only by immigration policies and enforcement measures of the host country, but also by their own personal characteristics and the economic environment they face at home and abroad. At the macroeconomic level, the focus is on the analysis of the effectiveness of immigration policies in controlling the inflow and the stock of undocumented aliens. The question of international cooperation between the host and transit countries is also examined.

Author : Siegfried Berninghaus,Hans G. Seifert-Vogt
Publisher : Springer Science & Business Media
Page : 124 pages
File Size : 49,8 Mb
Release : 2013-06-29
Category : Political Science
ISBN : 9783662027226

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International Migration Under Incomplete Information by Siegfried Berninghaus,Hans G. Seifert-Vogt Pdf

It is the main purpose of the book to give a logically consistent foundation of migration decision making under incomplete information in a unified framework. Decision rules for migration are derived from a general model of Stochastic Dynamic Programming and the properties of temporary migration equilibria are discussed as well. Finally, some hints are given for esti- mating the theoretical models which are elaborated in the book. Many results concerning the properties of optimal migration policies and of temporary migration equilibria are new. For example, it is demonstrated that less information about a country might it make more attractive for immigration, and conditions are analyzed that imply the existence of a significant stream of migrants even between identical countries in a temporary equilibrium state. The book is written for the mathematically oriented reader in economics, operations research or econometrics who is interested in application of Stochastic Dynamic Programming to an important field of research in population economics.

Author : Peter Berthold,Eberhard Gwinner,Edith Sonnenschein
Publisher : Springer Science & Business Media
Page : 601 pages
File Size : 48,9 Mb
Release : 2013-03-09
Category : Science
ISBN : 9783662059579

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Avian Migration by Peter Berthold,Eberhard Gwinner,Edith Sonnenschein Pdf

P. Berthold and E. Gwinnd Bird migration is an intriguing aspect of the living world - so much so that it has been investigated for as long, and as thoroughly, as almost any other natural phenomenon. Aristotle, who can count as the founder of scientific ornithology, paid very close attention to the migrations of the birds he ob served, but it was not until the reign of Friedrich II, in the first half of the 13th century, that reliable data began to be obtained. From then on, the data base grew rapidly. Systematic studies of bird migration were introduced when the Vogelwarte Rossitten was founded, as the first ornithological biological observation station in the world (see first chapter "In Memory of Vogelwarte Rossitten"). This area later received enormous impetus when ex perimental research on the subject was begun: the large-scale bird-ringing experiment initiated in Rossitten in 1903 by Johannes Thienemann (who was inspired by the pioneering studies of C. C. M. Mortensen), the experiments on photoperiodicity carried out by William Rowan in the 1920s in Canada and retention and release experiments performed by Thienemann in the 1930s in Rossitten, the first experimental study on the orientation of migratory birds. After the Second World War, migration research, while continuing in the previous areas, also expanded into new directions such as radar ornithology, ecophysiology and hormonal control mechanisms, studies of evolution, ge netics, telemetry and others.

Author : Karima Kourtit,Bruce Newbold,Peter Nijkamp,Mark Partridge
Publisher : Springer Nature
Page : 572 pages
File Size : 49,8 Mb
Release : 2020-12-07
Category : Business & Economics
ISBN : 9783030482916

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The Economic Geography of Cross-Border Migration by Karima Kourtit,Bruce Newbold,Peter Nijkamp,Mark Partridge Pdf

This handbook presents a collection of high-quality, authoritative scientific contributions on cross-border migration, written by a carefully selected group of recognized migration experts from around the globe. In recent years, cross-border migration has become an important and intriguing issue, from both a scientific and policy perspective. In the ‘age of migration’, the volume of cross-border movements of people continues to rise, while the nature of migration flows – in terms of the determinants, length of stay, effects on the sending and host countries, and legal status of migrants – is changing dramatically. Based on a detailed economic-geographical analysis, this handbook studies the motives for cross-border migration, the socio-economic implications for sending countries and regions, the locational choice determinants for cross-border migrants, and the manifold economic-geographic consequences for host countries and regions. Given the complexity of migration decisions and their local or regional impacts, a systematic typology of migrants (motives, legal status, level of education, gender, age, singles or families, etc.) is provided, together with an assessment of push factors in the place of origin and pull factors at the destination. On the basis of a solid analytical framework and reliable empirical evidence, it examines the impacts of emigration for sending areas and of immigration for receiving areas, and provides a comprehensive discussion of the policy dimensions of cross-border migration.

Author : Slobodan Djajic
Publisher : Routledge
Page : 296 pages
File Size : 54,7 Mb
Release : 2005-07-27
Category : Business & Economics
ISBN : 9781134557875

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International Migration by Slobodan Djajic Pdf

This book provides a contemporary perspective on a broad range of international migration problems. It considers recent immigration trends and policies, examining migrant behaviour, illegal immigration and links between migration and trade.

Author : Klaus F. Zimmermann
Publisher : Springer Science & Business Media
Page : 269 pages
File Size : 51,9 Mb
Release : 2012-12-06
Category : Political Science
ISBN : 9783642581564

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Migration and Economic Development by Klaus F. Zimmermann Pdf

Klaus F. Zimmermann Migration has become a topic of substantial interest in Europe in recent years. Part of this interest is driven by the important political changes in East Europe and the potential threat of large East-West migration waves. However, due to the large differences in economic development a substantial migration pressure is also expected from the South of Europe as of other parts of the world. The global migration potential towards the higher developed areas has reached about 80 to 100 million people. Thereof, about 60 million would like to move permanently, 20 million temporarily and about 15 million are refugees and asylum seekers and approximately 30 million are iIIegals. The book consists of eight papers which are allocated to five parts: Theoretical Models (Part I), Performance of Migrants (Part 11), Migration Within Developing Countries (Part IV) and Immigration Policy (Part V)' Each paper begins with a brief summary of its content. Part I, Theoretical Models, contains first "A Microeconomic Zlmm.r-mann VI Model of Migration" by Siegfried Berninghaus and Hans-GUnther Seifert-Vogt. They study migration decision making under incomplete information and apply it to empirically relevant phenomena. The second paper by Gerhard Schmitt-Rink "Migration and International Factor Price Equalization" demonstrates that international migration tends to equalize national factor prices and factor shares even in the absence of international trade. In Part II, Performance of Migrants, Lucie Merkle and Klaus F.

Author : S. Ghatak,A. Sassoon
Publisher : Springer
Page : 194 pages
File Size : 47,7 Mb
Release : 2001-09-12
Category : Social Science
ISBN : 9780230523128

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Migration and Mobility by S. Ghatak,A. Sassoon Pdf

People move, individually and collectively, for a combination of economic, social, political and cultural reasons. The impact of migration on the individuals concerned, their families, the countries they leave and the societies they join raises issues that are hotly contested by academics, policymakers and politicians. By using a wide variety of analytical approaches the contributors to this book reveal the complexity and significance of this increasingly important phenomenon in Western European countries, which links these societies to the wider world. They engage directly with the challenge which human mobility represents by examining the reasons for migration, the contribution and needs of those migrating, and the ways in which public debate about migration may be manipulated for political reasons.

Author : E.J. Milner-Gulland,John M. Fryxell,Anthony R.E. Sinclair
Publisher : Oxford University Press
Page : 280 pages
File Size : 46,6 Mb
Release : 2011-01-13
Category : Mathematics
ISBN : 9780199568994

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Animal Migration by E.J. Milner-Gulland,John M. Fryxell,Anthony R.E. Sinclair Pdf

Migration is a fascinating phenomenon that can contribute to the fundamental structuring of ecosystems. This seminal volume synthesises insights from both mathematical modelling and empirical research in order to generate a unified understanding of the mechanisms underlying migration.

Author : Hillel Rapoport
Publisher : World Bank Publications
Page : 39 pages
File Size : 46,8 Mb
Release : 2004
Category : Developing countries
ISBN : 8210379456XXX

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Skilled Migration by Hillel Rapoport Pdf

"Docquier and Rapoport focus on the consequences of skilled migration for developing countries. They first present new evidence on the magnitude of migration of skilled workers at the international level and then discuss its direct and indirect effects on human capital formation in developing countries in a unified stylized model. Finally they turn to policy implications, with emphasis on migration and education policy in a context of globalized labor markets. This paper-- a product of the Trade Team, Development Research Group-- is part of a larger effort in the group to measure and understand the implication of the brain drain as part of the International Migration and Development Program"-- World Bank web site.