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Using isotopic variance to detect long-distance dispersal and philopatry in birds: An example with Ovenbirds and American redstarts Open Access

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Author or creator
Hobson, K.A.
Wassenaar, L.I.
Bayne, E.M.
Additional contributors
Subject/Keyword
feathers
dispersal
philopatry
deuterium
carbon-13
stable isotopes
source-sink populations
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Understanding movement so f individualb irdsb etweenb reedings ites (breeding dispersal) or between natal sites and the site of first breeding (natal dispersal) is crucial to the modelingo f populationd ynamics.U nfortunatelyt,h ese aspectso f demographya rep oorly understoodf or avian species in general, and for migratorys ongbirdsi n particularT. his is because it is often impossible to sample broadly enough to relocate marked birds that have moved. We used stable-hydrogen(8 D) and carbon( 613C)is otope analyseso f the featherso f 139 American Redstarts (Setophaga ruticilla) and 193 Ovenbirds (Seiurus aurocapillus) to evaluate evidence for individuals molting feathers at locations other than their breeding sites from the previous year. We sampled outer rectrices from breeding populations at three extensive boreal forest sites (Prince Albert National Park and Duck Mountain, Saskatchewan, and Lac La Biche, Alberta) and at three isolated forest tracts (Cypress Hills, and Moose Mountain, Saskatchewan, and Turtle Mountain, Manitoba) in western Canada. Based on outliera nalysiso f 6D measurementsw, e found evidence for long-distanced ispersalr anging from 0-29% of individuals. For both species, second-year birds had higher variance in 6D values suggestingt hey had a higher probabilityo f originatingf rom elsewherec omparedt o after-second-yeabr irds.
Date created
2004
License information
Rights
© The Cooper Ornithological Society 2004
Citation for previous publication
KA Hobson, LI Wassenaar and EM Bayne. "Using isotopic variance to detect long-distance dispersal and philopatry in birds: An example with Ovenbirds and American redstarts." Condor 106 (2004): 732-743.
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File title: Using Isotopic Variance to Detect Long-Distance Dispersal and Philopatry in Birds: An Example with Overbirds and American Redstarts
Page count: 12
File language: en
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