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Seasonal migration to high latitudes results in major reproductive benefits in an insect

Chapman, Jason W.; Bell, James R.; Burgin, Laura E.; Reynolds, Donald R.; Pettersson, Lars LU ; Hill, Jane K.; Bonsall, Michael B. and Thomas, Jeremy A. (2012) In Proceedings of the National Academy of Sciences 109(37). p.14924-14929
Abstract
Little is known of the population dynamics of long-range insect migrants, and it has been suggested that the annual journeys of billions of nonhardy insects to exploit temperate zones during summer represent a sink from which future generations seldom return (the “Pied Piper” effect). We combine data from entomological radars and ground-based light traps to show that annual migrations are highly adaptive in the noctuid moth Autographa gamma (silver Y), a major agricultural pest. We estimate that 10–240 million immigrants reach the United Kingdom each spring, but that summer breeding results in a fourfold increase in the abundance of the subsequent generation of adults, all of which emigrate southward in the fall. Trajectory simulations... (More)
Little is known of the population dynamics of long-range insect migrants, and it has been suggested that the annual journeys of billions of nonhardy insects to exploit temperate zones during summer represent a sink from which future generations seldom return (the “Pied Piper” effect). We combine data from entomological radars and ground-based light traps to show that annual migrations are highly adaptive in the noctuid moth Autographa gamma (silver Y), a major agricultural pest. We estimate that 10–240 million immigrants reach the United Kingdom each spring, but that summer breeding results in a fourfold increase in the abundance of the subsequent generation of adults, all of which emigrate southward in the fall. Trajectory simulations show that 80% of emigrants will reach regions suitable for winter breeding in the Mediterranean Basin, for which our population dynamics model predicts a winter carrying capacity only 20% of that of northern Europe during the summer. We conclude not only that poleward insect migrations in spring result in major population increases, but also that the persistence of such species is dependent on summer breeding in high-latitude regions, which requires a fundamental change in our understanding of insect migration. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
windborne migration, source-sink dynamics
in
Proceedings of the National Academy of Sciences
volume
109
issue
37
pages
14924 - 14929
publisher
National Acad Sciences
external identifiers
  • wos:000309208000048
  • scopus:84866277487
ISSN
1091-6490
DOI
10.1073/pnas.1207255109
project
BECC
language
English
LU publication?
yes
id
ca9b8e77-4b4e-4548-83c6-3e88df603cc0 (old id 3165278)
alternative location
http://www.pnas.org/content/109/37/14924.abstract
date added to LUP
2012-11-12 12:49:11
date last changed
2017-10-22 03:20:16
@article{ca9b8e77-4b4e-4548-83c6-3e88df603cc0,
  abstract     = {Little is known of the population dynamics of long-range insect migrants, and it has been suggested that the annual journeys of billions of nonhardy insects to exploit temperate zones during summer represent a sink from which future generations seldom return (the “Pied Piper” effect). We combine data from entomological radars and ground-based light traps to show that annual migrations are highly adaptive in the noctuid moth Autographa gamma (silver Y), a major agricultural pest. We estimate that 10–240 million immigrants reach the United Kingdom each spring, but that summer breeding results in a fourfold increase in the abundance of the subsequent generation of adults, all of which emigrate southward in the fall. Trajectory simulations show that 80% of emigrants will reach regions suitable for winter breeding in the Mediterranean Basin, for which our population dynamics model predicts a winter carrying capacity only 20% of that of northern Europe during the summer. We conclude not only that poleward insect migrations in spring result in major population increases, but also that the persistence of such species is dependent on summer breeding in high-latitude regions, which requires a fundamental change in our understanding of insect migration.},
  author       = {Chapman, Jason W. and Bell, James R. and Burgin, Laura E. and Reynolds, Donald R. and Pettersson, Lars and Hill, Jane K. and Bonsall, Michael B. and Thomas, Jeremy A.},
  issn         = {1091-6490},
  keyword      = {windborne migration,source-sink dynamics},
  language     = {eng},
  number       = {37},
  pages        = {14924--14929},
  publisher    = {National Acad Sciences},
  series       = {Proceedings of the National Academy of Sciences},
  title        = {Seasonal migration to high latitudes results in major reproductive benefits in an insect},
  url          = {http://dx.doi.org/10.1073/pnas.1207255109},
  volume       = {109},
  year         = {2012},
}