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Author Kirkpatrick, J.F.; Wiesner, L.; Kenney, R.M.; Ganjam, V.K.; Turner, J.W. openurl 
  Title Seasonal variation in plasma androgens and testosterone in the North American wild horse Type Journal Article
  Year 1977 Publication The Journal of endocrinology Abbreviated Journal J Endocrinol  
  Volume 72 Issue 2 Pages 237-238  
  Keywords Androgens/*blood; Animals; Horses/*blood; Male; *Seasons; Testosterone/*blood  
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  Corporate Author Thesis  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0022-0795 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:845536 Approved no  
  Call Number (up) refbase @ user @ Serial 148  
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Author Kirkpatrick, J.F.; Vail, R.; Devous, S.; Schwend, S.; Baker, C.B.; Wiesner, L. openurl 
  Title Diurnal variation of plasma testosterone in wild stallions Type Journal Article
  Year 1976 Publication Biology of reproduction Abbreviated Journal Biol Reprod  
  Volume 15 Issue 1 Pages 98-101  
  Keywords Animals; *Circadian Rhythm; Horses/*blood; Male; Montana; Sexual Behavior, Animal; Species Specificity; Testosterone/*blood  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0006-3363 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:986195 Approved no  
  Call Number (up) refbase @ user @ Serial 149  
Permanent link to this record
 

 
Author Dzieweczynski, T.L.; Eklund, A.C.; Rowland, W.J. doi  openurl
  Title Male 11-ketotestosterone levels change as a result of being watched in Siamese fighting fish, Betta splendens Type Journal Article
  Year 2006 Publication General and comparative endocrinology Abbreviated Journal Gen Comp Endocrinol  
  Volume 147 Issue 2 Pages 184-189  
  Keywords Aggression; Animals; Female; Fishes/*blood; Male; Nesting Behavior; *Social Behavior; Social Environment; Testosterone/*analogs & derivatives/blood  
  Abstract This study investigated the effects of nesting status and the presence of an audience on 11-ketotestosterone (11KT) levels in male Siamese fighting fish, Betta splendens. Prior studies have demonstrated that both nesting status, an indicator of territory-holding power and reproductive state, and the sex of a conspecific audience lead to differences in male behavior during aggressive encounters. Since behavioral changes have already been demonstrated, we chose to investigate whether 11KT levels were also influenced by nesting status and audience presence as 11KT both stimulates, and is stimulated by, reproductive and aggressive behaviors in male teleosts. Male 11KT levels were measured from water samples taken from containers holding fish both before and after interaction. Males interacted under three treatment conditions: no audience, female audience, and male audience. Within these treatments were two nest paradigms: both males had nests or neither male had a nest. 11KT levels varied depending on nesting status and audience type. In general, 11KT levels were lower in interacting males when a female audience was present or when males had nests. Overall, 11KT showed increases or decreases as aggression increased or decreased, as shown by already established behavioral findings [see Dzieweczynski T.L., Green T.M., Earley R.L., Rowland W.J., 2005. Audience effect is context dependent in Siamese fighting fish, Betta splendens. Behav. Ecol. 16, 1025-1030; Doutrelant, C., McGregor, P.K., Oliveira, R.F., 2001. Effect of an audience on intrasexual communication in male Siamese fighting fish (Betta splendens). Behav. Ecol. 12, 283-286.]. Our results suggest that 11KT levels are influenced by reproductive status, as indicated by nest ownership, and audience presence and are most likely modulated by territorial behavior and social environment.  
  Address Department of Psychology, University of New England, Biddeford, ME 04005, USA. tdzieweczynski@une.edu  
  Corporate Author Thesis  
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  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0016-6480 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:16473353 Approved no  
  Call Number (up) refbase @ user @ Serial 502  
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