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Brawn, Jeffrey D. Jeffrey K. Conner Pfennig, Karin Susan 2015-09-25T22:43:07Z 2015-09-25T22:43:07Z 10000-01-01 1999 1999 A second controversial topic in understanding how sexual selection works is explaining why males often form breeding aggregations. This behavior seems paradoxical, because, by clustering with competitors, males may reduce their reproductive success. I examined male aggregation behavior in spadefoot toads. In phonotaxis experiments, males associated with a stimulus simulating a conspecific calling male, when given a choice between conspecific and heterospecific calls. When males were presented with different conspecific calls, poor-condition males associated with the stimulus preferred by females, whereas good-condition males associated with the stimulus not preferred by females. Thus, although males aggregate with conspecifics, they adjust their positions relative to competitors depending on their condition, thereby potentially enhancing their reproductive success. Made available in DSpace on 2015-09-25T22:43:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9944966.pdf: 5179809 bytes, checksum: f2be811d6867314aceabaab93c839ef4 (MD5) Previous issue date: 1999 Embargo set by: Seth Robbins for item 86687 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 105 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999. http://hdl.handle.net/2142/85406 (MiAaPQ)AAI9944966 eng Biology, Zoology The Evolution of Mate Choice in Spadefoot Toads text Biology Biology University of Illinois at Urbana-Champaign Dissertation Ph.D.