Birds of Indian Subcontinent

Fledging Success in Experimentally Manipulated Broods of House Wrens

Publication Type:Journal Article
Year of Publication:1993
Authors:Arnold, TW
Journal:The Wilson Bulletin
Date Published:1993
ISBN Number:00435643
Keywords:Aedon, Troglodytes, Troglodytes aedon, Troglodytes troglodytes, Troglodytidae
Abstract:I manipulated brood size in a population of box-nesting House Wrens (Troglodytes aedon) to determine if fledging success was limited by the ability of parents to provision nestlings. Enlarged broods produced significantly more fledged young than did control or reduced broods, but fledglings from enlarged broods weighed 6-7% less than fledglings from other broods. Fledging success was unrelated to original clutch size, but parents that laid large clutches fledged heavier offspring. These results do not support the brood-provisioning hypothesis. Brood size in House Wrens may be limited by post-fledging survival or interseasonal costs of reproduction, but I was unable to assess these factors in this study.
Short Title:The Wilson Bulletin
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith