EXPERIMENTS IN BIRD MIGRATION. II. REVERSED MIGRATION
نویسندگان
چکیده
منابع مشابه
Experiments In Migration Mapping
Migration maps represent patterns of geographical movement by arrows or bands between places, using information arriving in “from-to” tables. In the most interesting cases the tables are of large size, suggesting that computer assistance would be useful in the preparation of the maps. A computer program prepared for this purpose shows that graphical representation is feasible for tables as larg...
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The exploration of animal migration has entered a new era with individual-based tracking during multiple years. Here, we investigated repeated migratory journeys of a long-distance migrating bird, the marsh harrier Circus aeruginosus, in order to analyse the variation within and between individuals with respect to routes and timing. We found that there was a stronger individual repeatability in...
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Spatiotemporal information on bird migration is of invaluable use to scientists and society alike, but so far no sensor networks have been established that can monitor bird movement continuously over large areas. In aviation bird migration information is important for improving flight safety. Especially military low level flying has a high risk of en-route bird strikes and spatial bird migratio...
متن کاملElderly Migration and Its Correlates in Iran
Objectives: When it comes to migration, the migration of young people comes to mind and the migration of the older adults is ignored. While, migration after retirement is an important and increasing phenomenon. The reasons and destinations of migration of the older persons are different from those of the young. Young people usually migrate to urban destinations and further distances with more ...
متن کاملWeather and bird migration Norman Elkins
© British Birds 98 • May 2005 • 238-256 ABSTRACT Bird migration in and through Britain and Ireland shows great variation, both seasonally and annually. Much depends on atmospheric conditions, which can equally hinder and assist migration, both on a broad scale (the distribution, extent, intensity and movement of pressure patterns), and at a local level (temporal and spatial changes in wind, vis...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1930
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.16.7.520