Genetic Determination of Migration Strategies in Large Soaring Birds: Evidence from Hybrid Eagles

Overview

Journal Proc Biol Sci

Specialty Biology

Date 2018 Aug 17

PMID 30111595

Citations 6

Authors

Ulo Vali

Pawel Mirski

Urmas Sellis

Mindaugas Dagys

Grzegorz Maciorowski

Affiliations

Soon will be listed here.

Abstract

The relative contributions of genetic and social factors in shaping the living world are a crucial question in ecology. The annual migration of birds to their wintering grounds and back provides significant knowledge in this field of research. Migratory movements are predominantly genetically determined in passerine birds, while in large soaring birds, it is presumed that social (cultural) factors play the largest role. In this study, we show that genetic factors in soaring birds are more important than previously assumed. We used global positioning system (GPS)-telemetry to compare the autumn journeys and wintering ranges of two closely related large raptorial bird species, the greater spotted eagle and the lesser spotted eagle , and hybrids between them. The timing of migration in hybrids was similar to that of one parental species, but the wintering distributions and home range sizes were similar to those of the other. Tracking data were supported by habitat suitability modelling, based on GPS fixes and ring recoveries. These results suggest a strong genetic influence on migration strategy via a trait-dependent dominance effect, although we cannot rule out the contribution of social interactions.

Citing Articles

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