Publikation: Simple rules guide dragonfly migration
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Every year billions of butterflies, dragonflies, moths and other insects migrate across continents, and considerable progress has been made in understanding population-level migratory phenomena. However, little is known about destinations and strategies of individual insects. We attached miniaturized radio transmitters (ca 300 mg) to the thoraxes of 14 individual dragonflies (common green darners, Anax junius) and followed them during their autumn migration for up to 12 days, using receiver-equipped Cessna airplanes and ground teams. Green darners exhibited distinct stopover and migration days. On average, they migrated every 2.9+/-0.3 days, and their average net advance was 58+/-11 km in 6.1+/-0.9 days (11.9+/-2.8 km d-1) in a generally southward direction (186+/-52 degrees). They migrated exclusively during the daytime, when wind speeds were less than 25 km h-1, regardless of wind direction, but only after two nights of successively lower temperatures (decrease of 2.1+/-0.6 degrees C in minimum temperature). The migratory patterns and apparent decision rules of green darners are strikingly similar to those proposed for songbirds, and may represent a general migration strategy for long-distance migration of organisms with high self-propelled flight speeds.
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WIKELSKI, Martin, David MOSKOWITZ, James S. ADELMAN, Jim COCHRAN, David S. WILCOVE, Michael L. MAY, 2006. Simple rules guide dragonfly migration. In: Biology Letters. 2006, 2(3), pp. 325-329. ISSN 1744-9561. eISSN 1744-957X. Available under: doi: 10.1098/rsbl.2006.0487BibTex
@article{Wikelski2006-09-22Simpl-42346,
year={2006},
doi={10.1098/rsbl.2006.0487},
title={Simple rules guide dragonfly migration},
number={3},
volume={2},
issn={1744-9561},
journal={Biology Letters},
pages={325--329},
author={Wikelski, Martin and Moskowitz, David and Adelman, James S. and Cochran, Jim and Wilcove, David S. and May, Michael L.}
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<dcterms:abstract xml:lang="eng">Every year billions of butterflies, dragonflies, moths and other insects migrate across continents, and considerable progress has been made in understanding population-level migratory phenomena. However, little is known about destinations and strategies of individual insects. We attached miniaturized radio transmitters (ca 300 mg) to the thoraxes of 14 individual dragonflies (common green darners, Anax junius) and followed them during their autumn migration for up to 12 days, using receiver-equipped Cessna airplanes and ground teams. Green darners exhibited distinct stopover and migration days. On average, they migrated every 2.9+/-0.3 days, and their average net advance was 58+/-11 km in 6.1+/-0.9 days (11.9+/-2.8 km d<sup>-1</sup>) in a generally southward direction (186+/-52 degrees). They migrated exclusively during the daytime, when wind speeds were less than 25 km h<sup>-1</sup>, regardless of wind direction, but only after two nights of successively lower temperatures (decrease of 2.1+/-0.6 degrees C in minimum temperature). The migratory patterns and apparent decision rules of green darners are strikingly similar to those proposed for songbirds, and may represent a general migration strategy for long-distance migration of organisms with high self-propelled flight speeds.</dcterms:abstract>
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