2026-09-22T03:13:42Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/21443 2023-07-10 col_2142_5131 col_2142_14771 col_2142_97958 com_2142_5130 com_2142_685 com_2142_397 com_2142_8803 com_2142_10683

Philipp, David P. Kindler, Pawel Marcin 2011-05-07T13:08:48Z 2011-05-07T13:08:48Z 10000-01-01 1990 "The bluegill (Lepomis macrochirus), has a complex mating system which includes two male life histories--delayed maturity involving ""parental"" breeding behavior and precocious maturity involving ""cuckoldry"". Unlike cuckolders, members of the parental life history build nests and provide parental care to the offspring. The research presented in this thesis was performed to elucidate the role of hormones in the expression of reproductive behaviors among male bluegill. The first experiment determined the association of 11-ketotestosterone (11KT) and testosterone (T), two important androgen hormones regulating reproduction in teleost fish, with reproduction in both types of male bluegill. The second study assessed the role of these androgens in the expression of prespawning and parental care behaviors by parental males. Therefore, the effect of exogenously added 11KT, T, or an antiandrogen--cyproterone acetate (CYA) on such behaviors was investigated through observations and underwater tests of treated male bluegill. Finally, the third study investigated the involvement of prolactin (PRL), a protein hormone associated with the expression of parental behaviors in some vertebrates, with the hormonal regulation of parental care behaviors in nesting parental male bluegill. Specifically, the effects of exogenously added bromocriptine, a known prolactin-release inhibitor, on these fish was investigated in the wild. The results of these three studies established that parental and cuckolder male bluegill differ not only in their reproductive behaviors but also in physiological functions affecting reproduction. Second, they indicated that the mechanism regulating prespawning behaviors is complex and involves interactions between environmental, social, and physiological factors. Third, they demonstrated that 11KT is directly involved in the expression of spawning behavior characteristic of the parental males. Fourth, they provided evidence that, as in birds and mammals, PRL may be an important regulator of parental care behavior in fish. Thus, the involvement of PRL in the expression of parental care behavior in higher vertebrates may have its ancestral origin in fish." Made available in DSpace on 2011-05-07T13:08:48Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9026230.pdf: 3916335 bytes, checksum: 3c3f9b3e6fd5fdee513988b47ce704dc (MD5) Previous issue date: 1990 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:50:49Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:23:15-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission ETDs are only available to UIUC Users without author permission U of I Only AAI9026230 (UMI)AAI9026230 http://hdl.handle.net/2142/21443 eng Copyright 1990 Kindler, Pawel Marcin Biology, Animal Physiology Biology, Zoology Agriculture, Fisheries and Aquaculture Role of 11-ketotestosterone, testosterone, and prolactin in the expression of reproductive behaviors by male bluegill text Animal Sciences Animal Sciences University of Illinois at Urbana-Champaign Dissertation Ph.D.