=LDR 22 4500 =001 4006 =082 04$a2009 DER =100 1\$aDermody, Brian =245 10$aOptimal foraging strategies in ephemeral habitats: a vulture case study =260 \\$aDublin :$bUniversity of Dublin, Trinity College,$c2009 =650 \0$aTheses =852 \\$bFreeman Library$h2009 DER