期刊
CONSERVATION PHYSIOLOGY
卷 9, 期 -, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/conphys/coab032
关键词
Danaus plexippus; insect migration; pollinator conservation; radio tracking
资金
- Natural Sciences and Engineering Research Council (NSERC) [2015-06783]
- Canada First Research Excellence Fund [000054]
- Ontario Ministry of Agriculture, Food and Rural Affairs [030267]
- Environment and Climate Change Canada
- NSERC Alexander Graham Bell Canada Graduate Scholarship (CGS D)
- Ontario Graduate Scholarship
- Weston Family Foundation
- Food from Thought: Agricultural Systems for a Healthy Planet Initiative
Research indicates that captive-reared monarch butterflies may experience temporary disorientation, but proper orientation is likely to be established after exposure to natural skylight cues.
Eastern North American migratory monarch butterflies (Danaus plexippus) have faced sharp declines over the past two decades. Captive rearing of monarch butterflies is a popular and widely used approach for both public education and conservation. However, recent evidence suggests that captive-reared monarchs may lose their capacity to orient southward during fall migration to their Mexican overwintering sites, raising questions about the value and ethics of this activity undertaken by tens of thousands of North American citizens, educators, volunteers and conservationists each year. We raised offspring of wild-caught monarchs on swamp milkweed (Asclepias incarnata) indoors at 29 degrees C during the day and 23 degrees C at night (similar to 77% RH, 18L:6D), and after eclosion, individuals were either tested in a flight simulator or radio tracked in the wild using an array of automated telemetry towers. While 26% (10/39) of monarchs tested in the flight simulator showed a weakly concentrated southward orientation, 97% (28/29) of the radio-tracked individuals that could be reliably detected by automated towers flew in a south to southeast direction from the release site and were detected at distances of up to 200 km away. Our results suggest that, although captive rearing of monarch butterflies may cause temporary disorientation, proper orientation is likely established after exposure to natural skylight cues.
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