Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"Long distance migration"”.
-
Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… hereafter ‘sage-grouse’) population with the longest-known annual migration, a 240-km journey between summer range in north central Montana, USA, and Saskatchewan, Canada, to winter range north of the Missouri River. We learned more about grouse migration by asking: Do birds fly quickly …
-
Conserving Montana's sagebrush highway: long distance migration in sage-grouse
… hereafter ‘sage-grouse’) population with the longest-known annual migration, a 240-km journey between summer range in north central Montana, USA, and Saskatchewan, Canada, to winter range north of the Missouri River. We learned more about grouse migration by asking: Do birds fly quickly …
-
Using Light-Level Geolocation to Investigate the Carry-Over Effects of Long-Distance Migration on the Reproductive Success of Dunlin (Calidris Alpina Hudsonia)
Avian migration strategies can have lasting effects on individual fitness in subsequent seasons. These carry-over effects are difficult to study in migratory species because of the geographical separation between breeding and non-breeding sites. I used light-level geolocation to examine, for the …
-
The genetics and movement of ecologically important migratory Hoverflies
Migration is a diverse and widespread phenomenon occurring throughout the animal kingdom on all continents of the earth. Insects are the most numerous terrestrial migrants, far surpassing vertebrates in terms of biomass and abundance, and have profound impacts on ecosystem processes, such as …
-
The effects of regional weather patterns on the migration of birds and Lepidoptera to a coastal migration “hotspot” in East Kent and possible changes in occurrence in response to global climate change
The phenomenon of long-distance migration is an important strategy for the survival of many species by maximising chances of breeding success in different climates. By analysing past literature covering the effects of weather on migration, a research gap was found that related to understanding …
-
Internal migration in Malaysia:Spatial and temporal analysis
… world countries claimed that rural to urban migration was the result of rapid urbanisation in many developing countries. With the hypothesis that migration, especially rural to urban migration, is the dominant factor for urbanisation in Malaysia, a study is undertaken to investigate whether …
-
Aspects of the ecology of migrant shorebirds (Aves: Charadrii) at the Berg River estuary, South Africa
… to offset any additional risks incurred in long-distance migration.
-
The interaction between migration and disease in the Fall Armyworm, 'Spodoptera frugiperda'
Every year billions of insects undertake long-distance seasonal migrations, moving hundreds of tonnes of biomass across the globe and providing key ecological services. Yet we know very little about the complex migratory movements of these tiny animal migrants and less still about what causes their …
-
Perceptions of emigration in southern Scotland, c1770 - c1830
… the personal and public reactions to the emigration taking place in the Border region of Scotland at the turn of the nineteenth century. Separated into four parts—the landed, the church, the press and the families left behind—it explores the perceptions of each group and the motives and …
-
Population dynamics in first millennium BCE Italy: mobility and ancestry at Fermo, Marche
<p class="MsoNormal">Human migration is a crucial component in the formation of a community and a fundamental aspect of the socio-politic dynamic of a group. Exploring human migration in prehistoric contexts implies many challenges due to the absence of written documents or information other than …
-
Patterns of evolution in a young species, the Baltic seaweed Fucus radicans
… showed that rare sexual events, occasional long-distance migration and somatic mutations of large clones contribute new genotypic variation in populations of F. radicans. We further analysed the genetic structure of Fucus from areas not earlier investigated along the Finnish and Russian …
-
Breeding and migration ecology of bar-headed goose Anser indicus and swan goose Anser cygnoides in Asia
… the semiarid northern region of East Asia, are long distant migrants. They depend on availability of lake, river, and wetland habitats on their breeding and wintering grounds and need suitable staging and stopover sites along their flight routes to complete their migration. Waterfowl in this …
-
Species response to shifting and variable climates
… that allow us to assess the interplay of long-distance migration versus refugial persistence in biome development since the LGM. In this case, genetic analysis of chloroplast microsatellites from sampling populations on both sides of the disjunction revealed a long-standing isolation …
-
Migration Plasticity as an Adaptation to Climate Change: The Spatial Distribution and Abundance of a Subset of Neotropical Migrant Landbirds Wintering in the Northeastern United States
… to be just as, if not more important as the long-term global warming trend on the distribution of these wintering bird populations. In the second chapter, Christmas Bird Count-style counts conducted in November, December and February on Block Island, Rhode Island across eighteen winters (1995 …