dc.contributor.author |
Pugh, Lashale D. |
en_US |
dc.contributor.author |
Youngstown State University. Dept. of Biology. |
en_US |
dc.date.accessioned |
2011-01-31T14:18:25Z |
|
dc.date.accessioned |
2019-09-08T02:30:39Z |
|
dc.date.available |
2011-01-31T14:18:25Z |
|
dc.date.available |
2019-09-08T02:30:39Z |
|
dc.date.created |
2002 |
en_US |
dc.date.issued |
2002 |
en_US |
dc.identifier |
51524364 |
en_US |
dc.identifier.other |
b19036632 |
en_US |
dc.identifier.uri |
http://jupiter.ysu.edu/record=b1903663 |
en_US |
dc.identifier.uri |
http://hdl.handle.net/1989/6209 |
|
dc.description |
viii, 71 leaves : ill. ; 29 cm. |
en_US |
dc.description |
Thesis (M.S.)--Youngstown State University, 2002. |
en_US |
dc.description |
Includes bibliographical references (leaves 63-68). |
en_US |
dc.description.abstract |
Acadian Flycatchers (Empidonax virescens) at the Ravenna Training and
Logistics Site in northeast Ohio were observed to detennine if prey choice affects
reproductive success. Arthropods fed to nestlings by specialist pairs (n=3 nests) and
generalist pairs (n=5 nests) were identified using videotaped feedings of 7, 8, 9 and 10
day old nestlings. Specialists were classified as adult pairs for which 50% or more of the
prey fed to nestlings consisted of a particular order or arthropods. Prey quality was
detennined by size, with each food item being classified as small (0 - 5 mm), medium
(>5 - 10 mm), or large (> 10 mm). Nestlings were weighed at 10 days of age as a
measure of reproductive success.
For 4,727 feeding attempts, 1,715 (36%) prey were identified to order and 3,633
(77%) prey were sized. The predominant arthropods in the nestling diet were Dipterans
(45%), Lepidopterans (21 %), Hymenoptera (8%) and Phalangida (7%). Specialists
tended to feed young less often than generalists, yet there was no difference in average
nestling weight between specialist nests and generalist nests. Specialists fed prey from 5
- 9 orders whereas generalists fed prey from 7 - 11 orders. Specialists fed more large
prey to nestlings and generalists fed more small and medium prey to nestlings. Therefore,
it appears that the quality of prey may be more important than the quantity of prey fed to
nestlings. In addition, specialists tended to spend more time at the nest when feeding,
which would be adaptive for nest defense. These results suggest that a benefit of being
selective may be a reduced risk of predation at the nest. |
en_US |
dc.description.statementofresponsibility |
by Lashale D. Pugh. |
en_US |
dc.language.iso |
en_US |
en_US |
dc.relation.ispartofseries |
Master's Theses no. 0771 |
en_US |
dc.subject.classification |
Master's Theses no. 0771 |
en_US |
dc.subject.lcsh |
Acadian flycatcher. |
en_US |
dc.title |
Variation in nestling provisioning behavior in Acadian flycatchers (empidonax virescens) / |
en_US |
dc.type |
Thesis |
en_US |