Temporal variation in prey consumed by big brown bats (Eptesicus fuscus) in a maternity colony

Citation
Bj. Verts et al., Temporal variation in prey consumed by big brown bats (Eptesicus fuscus) in a maternity colony, NW SCI, 73(2), 1999, pp. 114-120
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
NORTHWEST SCIENCE
ISSN journal
0029-344X → ACNP
Volume
73
Issue
2
Year of publication
1999
Pages
114 - 120
Database
ISI
SICI code
0029-344X(199905)73:2<114:TVIPCB>2.0.ZU;2-C
Abstract
We hypothesized that prey consumed by bats in maternity colonies differed b y season and perhaps by time of day during postnatal development of young. Such was based on information that availability of prey to aerial-foraging bats differs spatially and temporally, some bats are selective of prey, and activity of lactating females varies with stage of development of young an d their demands for energy. We identified prey in fecal samples collected a t 2400 and 0600 h at weekly intervals from beneath two clusters of big brow n bats (Eptesicus fuscus) in a maternity colony in a barn in Benton County, Oregon during postnatal development of young. Only consumption of moths (L epidoptera) differed significantly by week; neither percent frequency nor a verage percent volume for any taxon of prey differed significantly by time of day. The overwhelming preponderance of caddisflies (Trichoptera) consume d possibly obscured variation in frequency and volume of other taxa of prey eaten. A maternity colony more distant from a single abundant, highly desi rable, source of easily captured prey possibly would exhibit greater differ ences in prey consumed during postnatal development of young.