scholarly journals Annual Pronghorn Survival of a Partially Migratory Population

2020 ◽  
Vol 84 (6) ◽  
pp. 1114-1126 ◽  
Author(s):  
Paul F. Jones ◽  
Andrew F. Jakes ◽  
Daniel R. Eacker ◽  
Mark Hebblewhite
Keyword(s):  
Migratory Population

Habitat Use by the Reintroduced Eastern Migratory Population of Whooping Cranes

2019 ◽  
pp. 307-325 ◽  
Author(s):  
Jeb A. Barzen ◽  
Anne E. Lacy ◽  
Hillary L. Thompson ◽  
Andrew P. Gossens
Keyword(s):  
Habitat Use ◽  
Whooping Cranes ◽  
Migratory Population

scholarly journals A STUDY ON MIGRATORY POPULATION IN INDIA: SOME SELECTED STATES

2020 ◽  
Vol 8 (6) ◽  
pp. 163-168
Author(s):  
Anjan Chakravarty
Keyword(s):  
West Bengal ◽  
Rural And Urban ◽  
Population Migrations ◽  
Unity In Diversity ◽  
Migratory Population ◽  
Diverse Culture ◽  
Inter State

India is the motherland of diverse culture, beliefs and traditions. Indians have lived through ages with the maxim “Unity in Diversity”. In this so varied nature of population, migrations intra-state and inter-state, as well as, international from bordering countries have affected the characteristics of the inhabitants. In this study, we are aiming to assess the nature of population India has, both in rural and urban categories and how these two categories of population are correlated with each other and try to analyze factors which create an impact on the character of the population. We have selected four states, namely, Gujarat, Maharashtra, Bihar and West Bengal for the purpose of our learning.  

scholarly journals Migration confers winter survival benefits in a partially migratory songbird

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Daniel Zúñiga ◽  
Yann Gager ◽  
Hanna Kokko ◽  
Adam Michael Fudickar ◽  
Andreas Schmidt ◽  
...  
Keyword(s):  
Empirical Evidence ◽  
Breeding Success ◽  
Empirical Data ◽  
Radio Telemetry ◽  
Theoretical Models ◽  
Seasonal Migration ◽  
Survival Models ◽  
Fitness Benefits ◽  
Migratory Population ◽  
Migratory Songbird

To evolve and to be maintained, seasonal migration, despite its risks, has to yield fitness benefits compared with year-round residency. Empirical data supporting this prediction have remained elusive in the bird literature. To test fitness related benefits of migration, we studied a partial migratory population of European blackbirds (Turdus merula) over 7 years. Using a combination of capture-mark-recapture and radio telemetry, we compared survival probabilities between migrants and residents estimated by multi-event survival models, showing that migrant blackbirds had 16% higher probability to survive the winter compared to residents. A subsequent modelling exercise revealed that residents should have 61.25% higher breeding success than migrants, to outweigh the survival costs of residency. Our results support theoretical models that migration should confer survival benefits to evolve, and thus provide empirical evidence to understand the evolution and maintenance of migration.

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