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dc.contributor.authorHovick, Torre J.
dc.contributor.authorMiller, James R.
dc.contributor.authorKoford, Rolf R.
dc.contributor.authorEngle, David M.
dc.contributor.authorDebinski, Diane M.
dc.date.accessioned2018-12-04T17:05:02Z
dc.date.available2018-12-04T17:05:02Z
dc.date.issued2011-05
dc.identifier.citationTorre James Hovick, James R. Miller, Rolf R. Koford, David M. Engle, and Diane M. Debinski. "Postfledging Survival of Grasshopper Sparrows in Grasslands Managed with Fire and Grazing" Condor Vol. 113 Iss. 2 (2011) p. 429 - 437en_US
dc.identifier.issn1938-5129
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/15050
dc.description.abstractMore accurate estimates of survival after nestlings fledge are needed for population models to be parameterized and population dynamics to be understood during this vulnerable life stage. The period after fledging is the time when chicks learn to fly, forage, and hide from predators. We monitored postfledging survival, causespecific mortality, and movements of Grasshopper Sparrows (Ammodramus savannarum) in grassland managed with fire and grazing. In 2009, we attached radio transmitters to 50 nestlings from 50 different broods and modeled their survival in response to climatic, biological, and ecological variables. There was no effect of treatment on survival. The factor most influencing postfledging survival was age; no other variable was significant. The majority of chicks (74%) died within 3 days of radio-transmitter attachment. We attributed most mortality to mesopredators (48%) and exposure (28%). Fledglings' movements increased rapidly for the first 4 days after they left the nest and were relatively stable for the remaining 10 days we tracked them. On average, fledglings took flight for the first time 4 days after fledging and flew ≥10 m 9 days after fledging. Our data show that the Grasshopper Sparrow's survival rates may be less than most models relying on nest-success estimates predict, and we emphasize the importance of incorporating estimates of survival during the postfledging period in demographic models.en_US
dc.description.sponsorshipJ. E. Weaver Grant from the Nebraska Chapter of the Nature Conservancy; A. Bergstrom award from the Association of Field Ornithologists; Grant from the Iowa Department of Natural Resources small-grants program; United States Department of Agriculture’s National Research Initiative Grant.; Iowa State Wildlife Grants program grant T-1-R-15en_US
dc.language.isoenen_US
dc.rightsThis Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).en_US
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en_US
dc.titlePostfledging Survival of Grasshopper Sparrows in Grasslands Managed with Fire and Grazingen_US
dc.typeArticleen_US
mus.citation.extentfirstpage429en_US
mus.citation.extentlastpage437en_US
mus.citation.issue2en_US
mus.citation.journaltitleCondoren_US
mus.citation.volume113en_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.identifier.doi10.1525/cond.2011.100135en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentEcology.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage6en_US


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